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Taurodontism

Mendelian MONDO:0010098 hereditary disease tooth disorder

Taurodontism is a developmental dental anomaly of multirooted teeth defined by enlarged pulp chambers, apical displacement of the pulpal floor, and reduced cervical constriction. It is observed as an isolated trait and in syndromic contexts, with documented genetic associations involving WNT10A-, DLX3-, and KCTD1-related disorders and emerging mechanistic evidence for Axin1-AKT1-mTORC1-Shh dysregulation in Hertwig epithelial root sheath.

0
Mappings
0
Definitions
1
Inheritance
5
Pathophysiology
0
Histopathology
5
Phenotypes
4
Genes
1
Treatments
3
Subtypes
3
Differentials
3
Datasets
3
Trials
👪

Inheritance

1
Autosomal dominant inheritance in AIHHT-associated taurodontism HP:0000006
AD inheritance is documented in AIHHT forms that include taurodontism.
Autosomal dominant inheritance
Show evidence (1 reference)
PMID:15666299 SUPPORT Human Clinical
"Amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT) is an autosomal dominant (AD) trait associated with enamel defects and enlarged pulp chambers."
Directly supports AD inheritance in a taurodontism-associated condition.
◆

Subtypes

3
Hypotaurodontism
Mild taurodont morphology with apically displaced pulpal floor.
Show evidence (1 reference)
PMID:37128323 SUPPORT Human Clinical
"According to morphology, hypotaurodonts were the most common (60.39%) among taurodontic teeth."
Supports hypotaurodontism as a recognized and common subtype.
Mesotaurodontism
Intermediate taurodont morphology between hypo- and hypertaurodont forms.
Show evidence (1 reference)
PMID:278704 SUPPORT Human Clinical
"three types of taurodontism (meso-, hypo- and hypertaudodontism) were defined in biometric terms, using radiographic features of molar morphology."
Establishes mesotaurodontism as one of the canonical radiographic subtypes.
Hypertaurodontism
Severe taurodont morphology with marked apical displacement of furcation.
Show evidence (1 reference)
PMID:278704 SUPPORT Human Clinical
"Hypertaurodontism was found only in three cases, in the third molars."
Confirms hypertaurodontism as a distinct severe subtype.
⚙

Pathophysiology

5
Failed invagination of Hertwig epithelial root sheath diaphragm
Taurodont morphology is linked to altered root-sheath invagination, shifting furcation apically and expanding the pulp chamber in multirooted teeth.
epithelial cell link
odontogenesis link
tooth root link
Show evidence (1 reference)
PMID:18363703 SUPPORT Human Clinical
"Taurodontism can be defined as a change in tooth shape caused by the failure of Hertwig's epithelial sheath diaphragm to invaginate at the proper horizontal level."
Directly supports the canonical mechanism involving altered Hertwig sheath invagination.
Epithelial WNT10A-dependent root furcation failure
Loss of epithelial WNT10A signaling disrupts furcation formation and drives taurodont-like root morphology, implicating epithelial-mesenchymal signaling defects in root development.
epithelial cell link odontoblast link
epithelial cell proliferation link odontogenesis link
tooth root link
Show evidence (1 reference)
PMID:31914354 SUPPORT Model Organism
"our study provides the first in vivo evidence that epithelial Wnt10a guides root furcation formation and plays a crucial role in controlling the organized proliferation of adjacent mesenchymal cells by regulating proper Wnt4 expression during root furcation morphogenesis."
Supports a specific epithelial WNT10A mechanism in root furcation morphogenesis.
WNT10A-associated molar crown and root dysmorphology in humans
Human WNT10A variants are associated with taurodont root morphology, supporting a gene-dosage influenced mechanism affecting crown and root development.
odontoblast link
odontogenesis link
calcareous tooth link
Show evidence (2 references)
PMID:25629078 SUPPORT Human Clinical
"WNT10A heterozygotes exhibited molar root taurodontism and mild tooth agenesis (with incomplete penetrance) in their permanent dentitions."
Supports human genotype-phenotype association between WNT10A variation and taurodontism.
PMID:25629078 SUPPORT Human Clinical
"We conclude that molar crown and root dysmorphologies are caused by WNT10A defects and that the severity of the tooth agenesis correlates with the number of defective WNT10A alleles."
Supports causative role of WNT10A defects in root dysmorphology including taurodontism.
Axin1-AKT1-mTORC1-Shh translational dysregulation in HERS
Axin1-dependent control of AKT1-mTORC1 signaling in Hertwig epithelial root sheath regulates selective Shh translation and root morphogenesis; dysregulation produces defective roots.
epithelial cell link
regulation of translation link epithelial cell proliferation link
tooth root link
Show evidence (2 references)
DOI:10.1242/dev.202899 SUPPORT Model Organism
"Further studies reveal that Axin1 in the HERS negatively regulates the AKT1-mTORC1 pathway through binding to AKT1, leading to inhibition of ribosomal biogenesis and mRNA translation."
Establishes the upstream molecular mechanism in HERS.
DOI:10.1242/dev.202899 SUPPORT Model Organism
"Sonic hedgehog (Shh) protein, a morphogen essential for root development, is over-synthesized by upregulated mTORC1 activity upon Axin1 inactivation."
Links translational dysregulation to altered Shh morphogen output.
KCTD1-associated WNT-SHH-BMP signaling perturbation
Pathogenic KCTD1 variants segregate with taurodontism and related root anomalies, implicating altered WNT-SHH-BMP signaling control in human dental morphogenesis.
epithelial cell link
odontogenesis link
tooth root link
Show evidence (2 references)
DOI:10.3390/ijms25105179 SUPPORT Human Clinical
"The variants segregated with the dental anomalies in all nine patients from the two families."
Supports genetic segregation of KCTD1 variants with dental anomaly phenotypes including taurodontism.
DOI:10.3390/ijms25105179 SUPPORT In Vitro
"Functional studies on the p.Arg241Gln variant are consistent with an impact on β-catenin levels and canonical WNT signaling."
Supports mechanistic perturbation of WNT pathway signaling downstream of KCTD1 variation.
⬡

Causal Graph

graph LR
    Abnormal_dental_pulp_morphology["Abnormal dental pulp morphology"]
    Axin1_AKT1_mTORC1_Shh_translational_dysregulation_in_HERS["Axin1-AKT1-mTORC1-Shh translational dysregulation in HERS"]
    Tooth_agenesis["Tooth agenesis"]
    Abnormal_dental_root_morphology["Abnormal dental root morphology"]
    KCTD1_associated_WNT_SHH_BMP_signaling_perturbation["KCTD1-associated WNT-SHH-BMP signaling perturbation"]
    Epithelial_WNT10A_dependent_root_furcation_failure["Epithelial WNT10A-dependent root furcation failure"]
    Failed_invagination_of_Hertwig_epithelial_root_sheath_diaphragm["Failed invagination of Hertwig epithelial root sheath diaphragm"]
    Taurodontia["Taurodontia"]

    Failed_invagination_of_Hertwig_epithelial_root_sheath_diaphragm --> Abnormal_dental_pulp_morphology
    Epithelial_WNT10A_dependent_root_furcation_failure --> Taurodontia
    Axin1_AKT1_mTORC1_Shh_translational_dysregulation_in_HERS --> Abnormal_dental_root_morphology
    KCTD1_associated_WNT_SHH_BMP_signaling_perturbation --> Tooth_agenesis

    style Abnormal_dental_pulp_morphology fill:#fef3c7
    style Axin1_AKT1_mTORC1_Shh_translational_dysregulation_in_HERS fill:#dbeafe
    style Tooth_agenesis fill:#fef3c7
    style Abnormal_dental_root_morphology fill:#fef3c7
    style KCTD1_associated_WNT_SHH_BMP_signaling_perturbation fill:#dbeafe
    style Epithelial_WNT10A_dependent_root_furcation_failure fill:#dbeafe
    style Failed_invagination_of_Hertwig_epithelial_root_sheath_diaphragm fill:#dbeafe
    style Taurodontia fill:#fef3c7
●

Phenotypes

5
Taurodontia VERY_FREQUENT HP:0000679
Show evidence (1 reference)
PMID:18363703 SUPPORT Human Clinical
"An enlarged pulp chamber, apical displacement of the pulpal floor, and no constriction at the level of the cementoenamel junction are the characteristic features."
Provides defining morphological features of taurodontia.
Abnormal dental pulp morphology VERY_FREQUENT HP:0006479
Show evidence (1 reference)
PMID:34897365 SUPPORT Human Clinical
"Taurodontism is a continuous anatomical variation of permanent and primary posterior teeth represented by an enlargement of the pulp cavity."
Directly supports enlarged pulp cavity as a core phenotype.
Abnormal dental root morphology VERY_FREQUENT HP:0006486
Show evidence (1 reference)
PMID:31914354 SUPPORT Model Organism
"Wnt10a knockout in the whole tissue (EIIa-Cre;Wnt10aflox/flox) and in dental epithelium (K14-Cre;Wnt10aflox/flox) led to an absence of or apically located root furcation in molars of mice, a phenotype that resembled taurodontism."
Supports altered root furcation architecture as a central morphology.
Tooth agenesis OCCASIONAL HP:0009804
Show evidence (1 reference)
DOI:10.3390/ijms25105179 SUPPORT Human Clinical
"Clinical findings of the patients included taurodontism, unseparated roots, long roots, tooth agenesis, a supernumerary tooth, torus palatinus, and torus mandibularis."
Human family data supports tooth agenesis as a co-occurring phenotype in some taurodontism-associated genotypes.
Supernumerary tooth OCCASIONAL HP:0011069
Show evidence (1 reference)
DOI:10.3390/ijms25105179 SUPPORT Human Clinical
"Clinical findings of the patients included taurodontism, unseparated roots, long roots, tooth agenesis, a supernumerary tooth, torus palatinus, and torus mandibularis."
Human family data supports supernumerary tooth as a co-occurring phenotype.
🧬

Genetic Associations

4
WNT10A (Susceptibility)
Show evidence (1 reference)
PMID:25629078 SUPPORT Human Clinical
"WNT10A heterozygotes exhibited molar root taurodontism and mild tooth agenesis (with incomplete penetrance) in their permanent dentitions."
Supports association of WNT10A variation with taurodontism phenotype in humans.
DLX3 (Syndromic association)
Show evidence (1 reference)
PMID:15666299 SUPPORT Human Clinical
"Amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT) is an autosomal dominant (AD) trait associated with enamel defects and enlarged pulp chambers."
Supports DLX3-linked syndromic context for taurodontism.
KCTD1 (Susceptibility)
Show evidence (1 reference)
DOI:10.3390/ijms25105179 SUPPORT Human Clinical
"Whole exome sequencing identified two unrelated families with rare (p.Arg241Gln) or novel (p.Pro243Ser) variants in KCTD1."
Provides direct human genetic association evidence for KCTD1 in taurodontism-associated phenotypes.
AXIN1 (Mechanistic association)
Show evidence (2 references)
DOI:10.1242/dev.202899 SUPPORT Model Organism
"Here, we show that Axin1, a scaffold protein that negatively regulates canonical Wnt signaling, is strongly expressed in the HERS."
Supports AXIN1 involvement in the key epithelial compartment for root morphogenesis.
DOI:10.1242/dev.202899 SUPPORT Model Organism
"Axin1 ablation in the HERS of mice leads to defective root development, but in a manner independent of canonical Wnt signaling."
Demonstrates mechanistic dependency of root development on Axin1 in vivo.
💊

Treatments

1
Endodontic treatment with canal-focused planning MAXO:0000004
Endodontic therapy is feasible but requires careful canal identification and modified procedural strategy in taurodont teeth.
Show evidence (2 references)
PMID:12775010 SUPPORT Human Clinical
"Endodontic treatment of a taurodont tooth is challenging, because it requires special care in handling and identifying the number of root canals."
Supports the need for tailored endodontic procedural planning.
PMID:18363703 SUPPORT Human Clinical
"In performing root canal treatment on such teeth, one should appreciate the complexity of the root canal system, canal obliteration and configuration, and the potential for additional root canal systems."
Supports specific technical considerations for treatment in taurodont teeth.
🔀

Differential Diagnoses

3

Conditions with similar clinical presentations that must be differentiated from Taurodontism:

Hypomaturation-hypoplastic amelogenesis imperfecta with taurodontism Not Yet Curated MONDO:0007093
Overlapping Features AIHHT can present with taurodont molars similar to isolated taurodontism, but includes inherited enamel pathology and broader amelogenesis imperfecta features.
Distinguishing Features
  • Enamel defects are expected in AIHHT, whereas isolated taurodontism may occur without generalized enamel disease.
  • AIHHT is a defined autosomal dominant syndromic dental phenotype linked to DLX3-associated amelogenesis imperfecta.
Show evidence (1 reference)
PMID:15666299 SUPPORT Human Clinical
"Amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT) is an autosomal dominant (AD) trait associated with enamel defects and enlarged pulp chambers."
Supports overlap via taurodontism and distinction via enamel-defect syndrome context.
Tricho-dento-osseous syndrome Not Yet Curated MONDO:0008592
Overlapping Features TDO shares taurodontism and enamel abnormalities with AIHHT-spectrum disease but is differentiated by hair and osseous manifestations.
Distinguishing Features
  • Non-dental findings in TDO include hair phenotype changes and osseous abnormalities.
  • Taurodontism may overlap, but systemic ectodermal/skeletal findings support TDO over isolated taurodontism.
Show evidence (1 reference)
PMID:10466415 SUPPORT Human Clinical
"While enamel hypoplasia and taurodontism appear to be present in all TDO cases, non-dental features may be absent, with approximately half of TDO cases losing the kinky/curly hair phenotype seen in infancy by adolescence, and in almost 20% of cases, osseous changes are not evident."
Supports overlap in taurodontism but identifies distinguishing syndromic features for TDO.
Klinefelter syndrome MONDO:0006823
Overlapping Features Taurodontism may occur as part of chromosomal syndrome presentations such as XXY Klinefelter syndrome rather than as an isolated dental anomaly.
Distinguishing Features
  • Chromosomal and endocrine phenotype (XXY syndrome) distinguishes Klinefelter syndrome from isolated taurodontism.
  • Taurodontism is a frequent associated anomaly in Klinefelter syndrome rather than the sole defining diagnosis.
Show evidence (1 reference)
PMID:745217 SUPPORT Human Clinical
"Taurodont molars were observed in 6 of the 31 cases (19.4%), a significantly higher rate than among the controls."
Supports Klinefelter syndrome as a syndromic context where taurodontism can present and require differential consideration.
📊

Related Datasets

3
Effect of epithelial depletion of Wnt10a on gene expression alteration during tooth root furcation development geo:GSE228411
Bulk RNA-seq of molar epithelium from furcation region after epithelial Wnt10a ablation, directly probing molecular programs linked to taurodontism-like root furcation defects.
mouse BULK RNA SEQ n=6 GPL24247
molar epithelium from furcation region link
Conditions: K14-Cre;Wnt10aflox/flox Wnt10aflox/flox control
Show evidence (1 reference)
GEO:GSE228411 SUPPORT Model Organism
"In our previous study, the knockout of Wnt10a in dental epithelium resulted in the occurrence of taurodontism and root furcation defects, suggesting that epithelial Wnt10a was a pivotal signal to guide root furcation patterning."
Directly links this dataset to taurodontism-relevant root furcation biology.
Notum Regulates the Cusp and Root Patterns in Mouse Molar geo:GSE255946
Bulk RNA-seq of Notum-deficient mouse molar tooth germs to study Wnt-feedback regulation of cusp and root patterning with root fusion phenotypes.
mouse BULK RNA SEQ n=8 GPL24247
maxillary and mandibular molar tooth germs
Conditions: Notum knockout wild-type control
Show evidence (1 reference)
GEO:GSE255946 SUPPORT Model Organism
"Notum-deficient mice exhibited enlarged secondary EKs, resulting in broader cusp tips, altered cusp patterns, and reduced concavity in crown outline."
Supports a root/crown patterning model relevant to developmental mechanisms that overlap taurodont root morphology.
Arid1a-Plagl1-Hh signaling is indispensable for differentiation-associated cell cycle arrest of tooth root progenitors [RNA-Seq] geo:GSE166358
Bulk RNA-seq profiling in mouse tooth-root progenitor perturbation models highlighting Hh-linked root developmental arrest mechanisms.
mouse BULK RNA SEQ n=6 GPL19057
tooth root progenitor tissue
Conditions: Gli1-CreER;Arid1afl/fl conditional knockout control
Show evidence (1 reference)
GEO:GSE166358 SUPPORT Model Organism
"We show that loss of Arid1a impairs the differentiation-associated cell cycle arrest of tooth root progenitors through Hh signaling regulation, leading to shortened roots."
Supports root-development signaling mechanisms relevant to taurodontism pathobiology.
🔬

Clinical Trials

3
NCT01746121 NOT_APPLICABLE TERMINATED
Observational clinical and molecular characterization study of amelogenesis imperfecta cohorts, including genotype-phenotype work relevant to taurodontism-associated AI contexts.
Show evidence (1 reference)
clinicaltrials:NCT01746121 SUPPORT Human Clinical
"In this research protocol the investigators explore the phenotype including the enamel ultrastructure and the genotype of a cohort of patients presenting AI."
Supports ongoing clinical-genetic characterization in AI populations that overlap with taurodontism syndromic differentials.
NCT03810859 NOT_APPLICABLE UNKNOWN
Whole-exome sequencing study for inherited anomalies of mineralized tooth tissues to discover pathogenic variants relevant to complex dental phenotypes.
Show evidence (1 reference)
clinicaltrials:NCT03810859 SUPPORT Human Clinical
"ExoDent specifically aims to discover new genes and new mutations causing isolated amelogenesis imperfecta (AI) and dentinogenesis imperfecta (DI) and other dentin anomalies."
Provides trial-level evidence for active genomic discovery in dental anomalies that can include taurodont-like root phenotypes.
NCT07250906 NOT_APPLICABLE RECRUITING
Prospective pediatric study evaluating functional and psychosocial impact of veneer rehabilitation in amelogenesis imperfecta.
Show evidence (1 reference)
clinicaltrials:NCT07250906 SUPPORT Human Clinical
"This project aims to evaluate the impact of anterior veneer treatment on oral health-related quality of life in children with amelogenesis imperfecta (AI)."
Supports active interventional dental management research in AI populations that are relevant to taurodontism-associated differential care pathways.
{ }

Source YAML

click to show 
name: Taurodontism
creation_date: "2026-02-20T13:49:27Z"
updated_date: "2026-02-20T15:02:30Z"
description: >-
  Taurodontism is a developmental dental anomaly of multirooted teeth defined by
  enlarged pulp chambers, apical displacement of the pulpal floor, and reduced
  cervical constriction. It is observed as an isolated trait and in syndromic
  contexts, with documented genetic associations involving WNT10A-, DLX3-, and
  KCTD1-related disorders and emerging mechanistic evidence for Axin1-AKT1-mTORC1-Shh dysregulation in Hertwig epithelial root sheath.
category: Mendelian
disease_term:
  preferred_term: taurodontism
  term:
    id: MONDO:0010098
    label: taurodontism
parents:
- hereditary disease
- tooth disorder
synonyms:
- Taurodontia
- Bull teeth
- large pulp chambers in the molars
has_subtypes:
- name: Hypotaurodontism
  description: Mild taurodont morphology with apically displaced pulpal floor.
  evidence:
  - reference: PMID:37128323
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "According to morphology, hypotaurodonts were the most common (60.39%) among taurodontic teeth."
    explanation: Supports hypotaurodontism as a recognized and common subtype.
- name: Mesotaurodontism
  description: Intermediate taurodont morphology between hypo- and hypertaurodont forms.
  evidence:
  - reference: PMID:278704
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "three types of taurodontism (meso-, hypo- and hypertaudodontism) were defined in biometric terms, using radiographic features of molar morphology."
    explanation: Establishes mesotaurodontism as one of the canonical radiographic subtypes.
- name: Hypertaurodontism
  description: Severe taurodont morphology with marked apical displacement of furcation.
  evidence:
  - reference: PMID:278704
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Hypertaurodontism was found only in three cases, in the third molars."
    explanation: Confirms hypertaurodontism as a distinct severe subtype.
prevalence:
- population: Recent human populations (meta-analysis)
  percentage: 11.8
  evidence:
  - reference: PMID:34897365
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The meta-analyses were performed with a random model, calculating a weighted-mean prevalence of 11.8%."
    explanation: Provides pooled prevalence estimate from recent human studies.
- population: Adult dental cohort in Northwest China
  percentage: 29.14
  evidence:
  - reference: PMID:37128323
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Taurodontism was detected in 169 patients, with a prevalence of 29.14%, of which 27.24% were males and 30.65% were females."
    explanation: Provides cohort-based prevalence estimate in a defined population.
- population: Saudi CBCT cohort
  percentage: 8
  evidence:
  - reference: DOI:10.5144/0256-4947.2021.232
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Taurodontism was seen in 24 (8%) of the study participants and in 71 teeth (3.9%)."
    explanation: Provides a population-specific prevalence estimate from a CBCT cohort.
progression:
- phase: Odontogenesis and root furcation morphogenesis
  notes: Developmental anomaly emerges during root furcation formation in multirooted teeth.
  evidence:
  - reference: PMID:31914354
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Wnt10a knockout in the whole tissue (EIIa-Cre;Wnt10aflox/flox) and in dental epithelium (K14-Cre;Wnt10aflox/flox) led to an absence of or apically located root furcation in molars of mice, a phenotype that resembled taurodontism."
    explanation: Supports developmental timing of pathogenesis during root furcation morphogenesis.
- phase: HERS translational signaling dysregulation
  notes: Dysregulated AKT1-mTORC1 signaling in Hertwig epithelial root sheath perturbs Shh output and root patterning.
  evidence:
  - reference: DOI:10.1242/dev.202899
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Axin1 ablation in the HERS of mice leads to defective root development, but in a manner independent of canonical Wnt signaling."
    explanation: Defines a distinct mechanistic phase within root development where HERS signaling dysregulation drives pathology.
pathophysiology:
- name: Failed invagination of Hertwig epithelial root sheath diaphragm
  description: >-
    Taurodont morphology is linked to altered root-sheath invagination, shifting
    furcation apically and expanding the pulp chamber in multirooted teeth.
  cell_types:
  - preferred_term: epithelial cell
    term:
      id: CL:0000066
      label: epithelial cell
  biological_processes:
  - preferred_term: odontogenesis
    term:
      id: GO:0042476
      label: odontogenesis
  locations:
  - preferred_term: tooth root
    term:
      id: UBERON:0003677
      label: tooth root
  downstream:
  - target: Abnormal dental pulp morphology
    description: Altered root sheath morphogenesis produces enlarged pulp chambers.
    evidence:
    - reference: PMID:18363703
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "An enlarged pulp chamber, apical displacement of the pulpal floor, and no constriction at the level of the cementoenamel junction are the characteristic features."
      explanation: Connects failed root-sheath patterning to pulp-chamber enlargement.
  evidence:
  - reference: PMID:18363703
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Taurodontism can be defined as a change in tooth shape caused by the failure of Hertwig's epithelial sheath diaphragm to invaginate at the proper horizontal level."
    explanation: Directly supports the canonical mechanism involving altered Hertwig sheath invagination.
- name: Epithelial WNT10A-dependent root furcation failure
  description: >-
    Loss of epithelial WNT10A signaling disrupts furcation formation and drives
    taurodont-like root morphology, implicating epithelial-mesenchymal signaling
    defects in root development.
  cell_types:
  - preferred_term: epithelial cell
    term:
      id: CL:0000066
      label: epithelial cell
  - preferred_term: odontoblast
    term:
      id: CL:0000060
      label: odontoblast
  biological_processes:
  - preferred_term: epithelial cell proliferation
    term:
      id: GO:0050673
      label: epithelial cell proliferation
  - preferred_term: odontogenesis
    term:
      id: GO:0042476
      label: odontogenesis
  locations:
  - preferred_term: tooth root
    term:
      id: UBERON:0003677
      label: tooth root
  downstream:
  - target: Taurodontia
    description: Furcation failure yields classic taurodont root-trunk morphology.
    evidence:
    - reference: PMID:31914354
      supports: SUPPORT
      evidence_source: MODEL_ORGANISM
      snippet: "Wnt10a knockout in the whole tissue (EIIa-Cre;Wnt10aflox/flox) and in dental epithelium (K14-Cre;Wnt10aflox/flox) led to an absence of or apically located root furcation in molars of mice, a phenotype that resembled taurodontism."
      explanation: Demonstrates causal link between WNT10A perturbation and taurodont-like morphology.
  evidence:
  - reference: PMID:31914354
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "our study provides the first in vivo evidence that epithelial Wnt10a guides root furcation formation and plays a crucial role in controlling the organized proliferation of adjacent mesenchymal cells by regulating proper Wnt4 expression during root furcation morphogenesis."
    explanation: Supports a specific epithelial WNT10A mechanism in root furcation morphogenesis.
- name: WNT10A-associated molar crown and root dysmorphology in humans
  description: >-
    Human WNT10A variants are associated with taurodont root morphology,
    supporting a gene-dosage influenced mechanism affecting crown and root
    development.
  cell_types:
  - preferred_term: odontoblast
    term:
      id: CL:0000060
      label: odontoblast
  biological_processes:
  - preferred_term: odontogenesis
    term:
      id: GO:0042476
      label: odontogenesis
  locations:
  - preferred_term: calcareous tooth
    term:
      id: UBERON:0001091
      label: calcareous tooth
  evidence:
  - reference: PMID:25629078
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "WNT10A heterozygotes exhibited molar root taurodontism and mild tooth agenesis (with incomplete penetrance) in their permanent dentitions."
    explanation: Supports human genotype-phenotype association between WNT10A variation and taurodontism.
  - reference: PMID:25629078
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "We conclude that molar crown and root dysmorphologies are caused by WNT10A defects and that the severity of the tooth agenesis correlates with the number of defective WNT10A alleles."
    explanation: Supports causative role of WNT10A defects in root dysmorphology including taurodontism.
- name: Axin1-AKT1-mTORC1-Shh translational dysregulation in HERS
  description: >-
    Axin1-dependent control of AKT1-mTORC1 signaling in Hertwig epithelial root
    sheath regulates selective Shh translation and root morphogenesis;
    dysregulation produces defective roots.
  cell_types:
  - preferred_term: epithelial cell
    term:
      id: CL:0000066
      label: epithelial cell
  biological_processes:
  - preferred_term: regulation of translation
    term:
      id: GO:0006417
      label: regulation of translation
  - preferred_term: epithelial cell proliferation
    term:
      id: GO:0050673
      label: epithelial cell proliferation
  locations:
  - preferred_term: tooth root
    term:
      id: UBERON:0003677
      label: tooth root
  downstream:
  - target: Abnormal dental root morphology
    description: Dysregulated HERS translational control contributes to defective root development.
    evidence:
    - reference: DOI:10.1242/dev.202899
      supports: SUPPORT
      evidence_source: MODEL_ORGANISM
      snippet: "Importantly, either haploinsufficiency of the mTORC1 subunit Rptor or pharmacological inhibition of Shh signaling can rescue the root defects in Axin1 mutant mice."
      explanation: Rescue experiments support a causal link from pathway dysregulation to root morphological defects.
  evidence:
  - reference: DOI:10.1242/dev.202899
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Further studies reveal that Axin1 in the HERS negatively regulates the AKT1-mTORC1 pathway through binding to AKT1, leading to inhibition of ribosomal biogenesis and mRNA translation."
    explanation: Establishes the upstream molecular mechanism in HERS.
  - reference: DOI:10.1242/dev.202899
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Sonic hedgehog (Shh) protein, a morphogen essential for root development, is over-synthesized by upregulated mTORC1 activity upon Axin1 inactivation."
    explanation: Links translational dysregulation to altered Shh morphogen output.
- name: KCTD1-associated WNT-SHH-BMP signaling perturbation
  description: >-
    Pathogenic KCTD1 variants segregate with taurodontism and related root
    anomalies, implicating altered WNT-SHH-BMP signaling control in human
    dental morphogenesis.
  cell_types:
  - preferred_term: epithelial cell
    term:
      id: CL:0000066
      label: epithelial cell
  biological_processes:
  - preferred_term: odontogenesis
    term:
      id: GO:0042476
      label: odontogenesis
  locations:
  - preferred_term: tooth root
    term:
      id: UBERON:0003677
      label: tooth root
  downstream:
  - target: Tooth agenesis
    description: KCTD1 variant-associated developmental dysregulation can co-occur with reduced tooth number.
    evidence:
    - reference: DOI:10.3390/ijms25105179
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "Clinical findings of the patients included taurodontism, unseparated roots, long roots, tooth agenesis, a supernumerary tooth, torus palatinus, and torus mandibularis."
      explanation: Links pathway-associated KCTD1 phenotypes to downstream developmental outcomes including tooth agenesis.
  evidence:
  - reference: DOI:10.3390/ijms25105179
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The variants segregated with the dental anomalies in all nine patients from the two families."
    explanation: Supports genetic segregation of KCTD1 variants with dental anomaly phenotypes including taurodontism.
  - reference: DOI:10.3390/ijms25105179
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "Functional studies on the p.Arg241Gln variant are consistent with an impact on β-catenin levels and canonical WNT signaling."
    explanation: Supports mechanistic perturbation of WNT pathway signaling downstream of KCTD1 variation.
phenotypes:
- name: Taurodontia
  description: >-
    Defining radiographic phenotype with enlarged pulp chambers and apical
    displacement of pulpal floor/furcation in multirooted teeth.
  phenotype_term:
    preferred_term: Taurodontia
    term:
      id: HP:0000679
      label: Taurodontia
  frequency: VERY_FREQUENT
  diagnostic: true
  evidence:
  - reference: PMID:18363703
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "An enlarged pulp chamber, apical displacement of the pulpal floor, and no constriction at the level of the cementoenamel junction are the characteristic features."
    explanation: Provides defining morphological features of taurodontia.
- name: Abnormal dental pulp morphology
  description: Taurodontism is characterized by an enlarged pulp cavity/chamber.
  phenotype_term:
    preferred_term: Abnormal dental pulp morphology
    term:
      id: HP:0006479
      label: Abnormal dental pulp morphology
  frequency: VERY_FREQUENT
  diagnostic: true
  evidence:
  - reference: PMID:34897365
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Taurodontism is a continuous anatomical variation of permanent and primary posterior teeth represented by an enlargement of the pulp cavity."
    explanation: Directly supports enlarged pulp cavity as a core phenotype.
- name: Abnormal dental root morphology
  description: Root furcation is displaced apically with altered root-trunk configuration.
  phenotype_term:
    preferred_term: Abnormal dental root morphology
    term:
      id: HP:0006486
      label: Abnormal dental root morphology
  frequency: VERY_FREQUENT
  evidence:
  - reference: PMID:31914354
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Wnt10a knockout in the whole tissue (EIIa-Cre;Wnt10aflox/flox) and in dental epithelium (K14-Cre;Wnt10aflox/flox) led to an absence of or apically located root furcation in molars of mice, a phenotype that resembled taurodontism."
    explanation: Supports altered root furcation architecture as a central morphology.
- name: Tooth agenesis
  description: Reduced tooth number is an associated phenotype in KCTD1-associated dental anomaly presentations including taurodontism.
  phenotype_term:
    preferred_term: Tooth agenesis
    term:
      id: HP:0009804
      label: Tooth agenesis
  frequency: OCCASIONAL
  evidence:
  - reference: DOI:10.3390/ijms25105179
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Clinical findings of the patients included taurodontism, unseparated roots, long roots, tooth agenesis, a supernumerary tooth, torus palatinus, and torus mandibularis."
    explanation: Human family data supports tooth agenesis as a co-occurring phenotype in some taurodontism-associated genotypes.
- name: Supernumerary tooth
  description: Additional teeth can co-occur in genetically associated dental anomaly spectra that include taurodontism.
  phenotype_term:
    preferred_term: Supernumerary tooth
    term:
      id: HP:0011069
      label: Supernumerary tooth
  frequency: OCCASIONAL
  evidence:
  - reference: DOI:10.3390/ijms25105179
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Clinical findings of the patients included taurodontism, unseparated roots, long roots, tooth agenesis, a supernumerary tooth, torus palatinus, and torus mandibularis."
    explanation: Human family data supports supernumerary tooth as a co-occurring phenotype.
genetic:
- name: WNT10A
  gene_term:
    preferred_term: WNT10A
    term:
      id: hgnc:13829
      label: WNT10A
  association: Susceptibility
  notes: WNT10A variants are associated with taurodont root morphology in human kindreds.
  evidence:
  - reference: PMID:25629078
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "WNT10A heterozygotes exhibited molar root taurodontism and mild tooth agenesis (with incomplete penetrance) in their permanent dentitions."
    explanation: Supports association of WNT10A variation with taurodontism phenotype in humans.
- name: DLX3
  gene_term:
    preferred_term: DLX3
    term:
      id: hgnc:2916
      label: DLX3
  association: Syndromic association
  notes: DLX3 variants are linked to autosomal dominant AIHHT/TDO conditions that include taurodontism.
  evidence:
  - reference: PMID:15666299
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT) is an autosomal dominant (AD) trait associated with enamel defects and enlarged pulp chambers."
    explanation: Supports DLX3-linked syndromic context for taurodontism.
- name: KCTD1
  gene_term:
    preferred_term: KCTD1
    term:
      id: hgnc:18249
      label: KCTD1
  association: Susceptibility
  notes: KCTD1 variants are associated with isolated dental anomalies including taurodontism and root defects.
  evidence:
  - reference: DOI:10.3390/ijms25105179
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Whole exome sequencing identified two unrelated families with rare (p.Arg241Gln) or novel (p.Pro243Ser) variants in KCTD1."
    explanation: Provides direct human genetic association evidence for KCTD1 in taurodontism-associated phenotypes.
- name: AXIN1
  gene_term:
    preferred_term: AXIN1
    term:
      id: hgnc:903
      label: AXIN1
  association: Mechanistic association
  notes: Axin1 controls AKT1-mTORC1-Shh signaling in HERS and is required for normal root development in mouse models.
  evidence:
  - reference: DOI:10.1242/dev.202899
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Here, we show that Axin1, a scaffold protein that negatively regulates canonical Wnt signaling, is strongly expressed in the HERS."
    explanation: Supports AXIN1 involvement in the key epithelial compartment for root morphogenesis.
  - reference: DOI:10.1242/dev.202899
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Axin1 ablation in the HERS of mice leads to defective root development, but in a manner independent of canonical Wnt signaling."
    explanation: Demonstrates mechanistic dependency of root development on Axin1 in vivo.
inheritance:
- name: Autosomal dominant inheritance in AIHHT-associated taurodontism
  inheritance_term:
    preferred_term: Autosomal dominant inheritance
    term:
      id: HP:0000006
      label: Autosomal dominant inheritance
  description: AD inheritance is documented in AIHHT forms that include taurodontism.
  evidence:
  - reference: PMID:15666299
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT) is an autosomal dominant (AD) trait associated with enamel defects and enlarged pulp chambers."
    explanation: Directly supports AD inheritance in a taurodontism-associated condition.
treatments:
- name: Endodontic treatment with canal-focused planning
  description: >-
    Endodontic therapy is feasible but requires careful canal identification and
    modified procedural strategy in taurodont teeth.
  treatment_term:
    preferred_term: surgical procedure
    term:
      id: MAXO:0000004
      label: surgical procedure
  evidence:
  - reference: PMID:12775010
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Endodontic treatment of a taurodont tooth is challenging, because it requires special care in handling and identifying the number of root canals."
    explanation: Supports the need for tailored endodontic procedural planning.
  - reference: PMID:18363703
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "In performing root canal treatment on such teeth, one should appreciate the complexity of the root canal system, canal obliteration and configuration, and the potential for additional root canal systems."
    explanation: Supports specific technical considerations for treatment in taurodont teeth.
epidemiology:
- name: Broadly variable prevalence across populations
  description: Reported prevalence varies widely across study methods and populations.
  evidence:
  - reference: PMID:34897365
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Prevalence ranges between 0.1% and 48% in the literature."
    explanation: Summarizes substantial inter-study prevalence variability.
- name: Sex distribution
  description: Studies report no clear sex predominance in recent cohorts.
  evidence:
  - reference: PMID:37128323
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The chi-square test showed that there was no significant difference between males and females (P > 0.05)."
    explanation: Supports lack of significant sex difference in cohort prevalence.
- name: Maxillary predominance
  description: Taurodontism tends to be observed more frequently in maxillary molars in several CBCT cohorts.
  evidence:
  - reference: PMID:37128323
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Taurodonts were significantly more common in the maxilla (9.06%) than in the mandible (5.15%) (P < 0.001), and the maxillary second molar (25.18%) was the most common tooth affected."
    explanation: Supports anatomical distribution pattern with maxillary predominance.
  - reference: DOI:10.5144/0256-4947.2021.232
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The maxillary molars were more commonly involved than mandibular, but the results were not statistically significant."
    explanation: Provides additional cohort evidence for maxillary predilection trend.
diagnosis:
- name: Radiographic morphometric classification (Shifman and Chanannel criteria)
  description: >-
    Morphometric radiographic criteria are used to classify hypo-, meso-, and
    hypertaurodont forms.
  evidence:
  - reference: PMID:278704
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "three types of taurodontism (meso-, hypo- and hypertaudodontism) were defined in biometric terms, using radiographic features of molar morphology."
    explanation: Establishes radiographic morphometric criteria as a diagnostic framework.
- name: Cone-beam computed tomography (CBCT) assessment
  description: CBCT supports prevalence estimation and tooth-level morphological assessment.
  evidence:
  - reference: PMID:37128323
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The aim of this retrospective study was to evaluate the prevalence of taurodontism in a group of adult dental patients in Northwest China with the aid of cone-beam computed tomography (CBCT)."
    explanation: Supports CBCT as a modality used for taurodontism assessment.
- name: CBCT as adjunct for diagnosis and treatment planning
  description: Three-dimensional CBCT supports diagnosis and procedural planning for taurodontic teeth.
  evidence:
  - reference: DOI:10.5144/0256-4947.2021.232
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "A three-dimensional cone beam computed tomography (CBCT) can aid in the diagnosis and treatment of taurodontic teeth."
    explanation: Supports CBCT use as a practical adjunct in diagnosis and planning.
differential_diagnoses:
- name: Hypomaturation-hypoplastic amelogenesis imperfecta with taurodontism
  disease_term:
    preferred_term: hypomaturation-hypoplastic amelogenesis imperfecta with taurodontism
    term:
      id: MONDO:0007093
      label: hypomaturation-hypoplastic amelogenesis imperfecta with taurodontism
  description: >-
    AIHHT can present with taurodont molars similar to isolated taurodontism,
    but includes inherited enamel pathology and broader amelogenesis imperfecta
    features.
  distinguishing_features:
  - Enamel defects are expected in AIHHT, whereas isolated taurodontism may occur without generalized enamel disease.
  - AIHHT is a defined autosomal dominant syndromic dental phenotype linked to DLX3-associated amelogenesis imperfecta.
  evidence:
  - reference: PMID:15666299
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Amelogenesis imperfecta hypoplastic-hypomaturation with taurodontism (AIHHT) is an autosomal dominant (AD) trait associated with enamel defects and enlarged pulp chambers."
    explanation: Supports overlap via taurodontism and distinction via enamel-defect syndrome context.
- name: Tricho-dento-osseous syndrome
  disease_term:
    preferred_term: tricho-dento-osseous syndrome
    term:
      id: MONDO:0008592
      label: tricho-dento-osseous syndrome
  description: >-
    TDO shares taurodontism and enamel abnormalities with AIHHT-spectrum disease
    but is differentiated by hair and osseous manifestations.
  distinguishing_features:
  - Non-dental findings in TDO include hair phenotype changes and osseous abnormalities.
  - Taurodontism may overlap, but systemic ectodermal/skeletal findings support TDO over isolated taurodontism.
  evidence:
  - reference: PMID:10466415
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "While enamel hypoplasia and taurodontism appear to be present in all TDO cases, non-dental features may be absent, with approximately half of TDO cases losing the kinky/curly hair phenotype seen in infancy by adolescence, and in almost 20% of cases, osseous changes are not evident."
    explanation: Supports overlap in taurodontism but identifies distinguishing syndromic features for TDO.
- name: Klinefelter syndrome
  disease_term:
    preferred_term: Klinefelter syndrome
    term:
      id: MONDO:0006823
      label: Klinefelter syndrome
  description: >-
    Taurodontism may occur as part of chromosomal syndrome presentations such as
    XXY Klinefelter syndrome rather than as an isolated dental anomaly.
  distinguishing_features:
  - Chromosomal and endocrine phenotype (XXY syndrome) distinguishes Klinefelter syndrome from isolated taurodontism.
  - Taurodontism is a frequent associated anomaly in Klinefelter syndrome rather than the sole defining diagnosis.
  evidence:
  - reference: PMID:745217
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Taurodont molars were observed in 6 of the 31 cases (19.4%), a significantly higher rate than among the controls."
    explanation: Supports Klinefelter syndrome as a syndromic context where taurodontism can present and require differential consideration.
clinical_trials:
- name: NCT01746121
  phase: NOT_APPLICABLE
  status: TERMINATED
  description: Observational clinical and molecular characterization study of amelogenesis imperfecta cohorts, including genotype-phenotype work relevant to taurodontism-associated AI contexts.
  evidence:
  - reference: clinicaltrials:NCT01746121
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "In this research protocol the investigators explore the phenotype including the enamel ultrastructure and the genotype of a cohort of patients presenting AI."
    explanation: Supports ongoing clinical-genetic characterization in AI populations that overlap with taurodontism syndromic differentials.
- name: NCT03810859
  phase: NOT_APPLICABLE
  status: UNKNOWN
  description: Whole-exome sequencing study for inherited anomalies of mineralized tooth tissues to discover pathogenic variants relevant to complex dental phenotypes.
  evidence:
  - reference: clinicaltrials:NCT03810859
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "ExoDent specifically aims to discover new genes and new mutations causing isolated amelogenesis imperfecta (AI) and dentinogenesis imperfecta (DI) and other dentin anomalies."
    explanation: Provides trial-level evidence for active genomic discovery in dental anomalies that can include taurodont-like root phenotypes.
- name: NCT07250906
  phase: NOT_APPLICABLE
  status: RECRUITING
  description: Prospective pediatric study evaluating functional and psychosocial impact of veneer rehabilitation in amelogenesis imperfecta.
  evidence:
  - reference: clinicaltrials:NCT07250906
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "This project aims to evaluate the impact of anterior veneer treatment on oral health-related quality of life in children with amelogenesis imperfecta (AI)."
    explanation: Supports active interventional dental management research in AI populations that are relevant to taurodontism-associated differential care pathways.
datasets:
- accession: geo:GSE228411
  title: Effect of epithelial depletion of Wnt10a on gene expression alteration during tooth root furcation development
  description: Bulk RNA-seq of molar epithelium from furcation region after epithelial Wnt10a ablation, directly probing molecular programs linked to taurodontism-like root furcation defects.
  organism:
    preferred_term: mouse
    term:
      id: NCBITaxon:10090
      label: Mus musculus
  data_type: BULK_RNA_SEQ
  sample_types:
  - preferred_term: molar epithelium from furcation region
    term:
      id: UBERON:0005176
      label: tooth enamel organ
    tissue_term:
      preferred_term: tooth enamel organ
      term:
        id: UBERON:0005176
        label: tooth enamel organ
    cell_type_term:
      preferred_term: epithelial cell
      term:
        id: CL:0000066
        label: epithelial cell
  sample_count: 6
  conditions:
  - K14-Cre;Wnt10aflox/flox
  - Wnt10aflox/flox control
  platform: GPL24247
  evidence:
  - reference: GEO:GSE228411
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "In our previous study, the knockout of Wnt10a in dental epithelium resulted in the occurrence of taurodontism and root furcation defects, suggesting that epithelial Wnt10a was a pivotal signal to guide root furcation patterning."
    explanation: Directly links this dataset to taurodontism-relevant root furcation biology.
- accession: geo:GSE255946
  title: Notum Regulates the Cusp and Root Patterns in Mouse Molar
  description: Bulk RNA-seq of Notum-deficient mouse molar tooth germs to study Wnt-feedback regulation of cusp and root patterning with root fusion phenotypes.
  organism:
    preferred_term: mouse
    term:
      id: NCBITaxon:10090
      label: Mus musculus
  data_type: BULK_RNA_SEQ
  sample_types:
  - preferred_term: maxillary and mandibular molar tooth germs
    term:
      id: UBERON:0008281
      label: tooth bud
    tissue_term:
      preferred_term: tooth bud
      term:
        id: UBERON:0008281
        label: tooth bud
  sample_count: 8
  conditions:
  - Notum knockout
  - wild-type control
  platform: GPL24247
  evidence:
  - reference: GEO:GSE255946
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Notum-deficient mice exhibited enlarged secondary EKs, resulting in broader cusp tips, altered cusp patterns, and reduced concavity in crown outline."
    explanation: Supports a root/crown patterning model relevant to developmental mechanisms that overlap taurodont root morphology.
- accession: geo:GSE166358
  title: Arid1a-Plagl1-Hh signaling is indispensable for differentiation-associated cell cycle arrest of tooth root progenitors [RNA-Seq]
  description: Bulk RNA-seq profiling in mouse tooth-root progenitor perturbation models highlighting Hh-linked root developmental arrest mechanisms.
  organism:
    preferred_term: mouse
    term:
      id: NCBITaxon:10090
      label: Mus musculus
  data_type: BULK_RNA_SEQ
  sample_types:
  - preferred_term: tooth root progenitor tissue
    term:
      id: UBERON:0003677
      label: tooth root
    tissue_term:
      preferred_term: tooth root
      term:
        id: UBERON:0003677
        label: tooth root
  sample_count: 6
  conditions:
  - Gli1-CreER;Arid1afl/fl conditional knockout
  - control
  platform: GPL19057
  evidence:
  - reference: GEO:GSE166358
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "We show that loss of Arid1a impairs the differentiation-associated cell cycle arrest of tooth root progenitors through Hh signaling regulation, leading to shortened roots."
    explanation: Supports root-development signaling mechanisms relevant to taurodontism pathobiology.
notes: >-
  OMIM entry OMIM:272700 was suggested as a starting source, but direct automated
  retrieval was blocked by OMIM anti-crawling policy in this environment. Edison
  deep-research output from taurodontism_report.md was integrated into this
  curation, prioritizing retrievable primary-source evidence.