ABPD REVIEW Exam | Questions and Answers
Verified Solutions | Latest 2026/2027 Update
Pass Guaranteed
Q: Weeks at time of initiation?
Answer: 6-8
Q: Defect of initiation -->
Answer: Supernumary teeth Missing (agenesis) of teeth
Q: % of supernumaries that erupt
Answer: 25%
Q: Prevalence of supernumary teeth
Answer: 0.1-3.8% LOWER in primary teeth 5x more common in permanent teeth
Q: __% of supernumaries are in the maxilla
Answer: 90%
Q: Most common supernumary?
Answer: Mesiodens
Q: Two kinds of supernumary teeth?
Answer: Rudimentary Supplemental
Q: Syndromes associated with supernumary teeth?
Answer: Hallerman-Streiff Apert's Oro-facial-digital syndrome Cleidocranial Dysplasia Gardern's
Cleft palate Sturge Weber Down syndrome Crouzons
Q: Incidence of congenital agenesis?
Answer: 1.5-10% in Permanenet (<1% Primary) (more common than supernum)
Q: Most common congenitally missing tooth
Answer: 3rd Molars Mandibular 2nd premolars Maxillary Laterals Maxillary 2nd Premolars
Q: Syndromes associated with tooth agenesis
Answer: Cleft palate Ectodermal dysplasia Downs Ellis van Crevald (Chondroectodermal
dysplasia) Oro-Facial-Digital Hallerman-Streiff Crouzons
, Q: Clinical symptoms of Oro-Facial- Digital
Answer: Missing/asymmetry with digits Think frenal attachments Anomalous anterior teeth
Hypoplasia of alar cartilage
Q: Syndromes that manifest as Hypo and Hyperdontia
Answer: Hallerman Streiff Oro facial digital Crouzons Down
Q: Lit: Agenesis of mandibular centrals is also associated with _____ agenesis in males
Answer: Laterals
Q: Lit: Hyper or hypodontia is associated with delayed dental development?
Answer: Hypodontia
Q: Proliferation defects
Answer: (Cap stage) Defects in size -Fusion -Gemination -Macrodontia -Microdontia
Q: Incidence of both fusion and gemination is? AD/AR/Non hereditary?
Answer: 0.5% AD
Q: Bell - Histodifferentiation defects -- >?
Answer: Amelogenesis Imperfecta Dentinogenesis Imperfecta
Q: AI Type I vs II - AD? AR?
Answer: Type I - AD Type II - AR
Q: Advance Bell - Morphogenesis defects --> ?
Answer: Dens in dente Dens Evaginatus Taurodontism Dilaceration (Defects in form/shape)
Q: Most common tooth for dens in dente
Answer: Maxillary permanent lateral incisor
Q: Most common tooth for dens evaginatus
Answer: Common in Max incisors Laterals 50% Centrals 30% (Most in PERM)
Q: Dens evaginatus associated with what syndromes?
Answer: Sturge webber Rubinstein - Taybi Syndrome
Q: Syndromes associated with Taurodontism?
Answer: Klienfelter's Ectodermal dysplasia Down syndrome Hypotrichosis Oro-facial-Digital
Syndrome Amelogenesis Imperfecta
Q: Lit: Are missing teeth and/or supernumary teeth assocaited with taurodontism?
Answer: Missing teeth ARE related Supernumary are NOT related
Verified Solutions | Latest 2026/2027 Update
Pass Guaranteed
Q: Weeks at time of initiation?
Answer: 6-8
Q: Defect of initiation -->
Answer: Supernumary teeth Missing (agenesis) of teeth
Q: % of supernumaries that erupt
Answer: 25%
Q: Prevalence of supernumary teeth
Answer: 0.1-3.8% LOWER in primary teeth 5x more common in permanent teeth
Q: __% of supernumaries are in the maxilla
Answer: 90%
Q: Most common supernumary?
Answer: Mesiodens
Q: Two kinds of supernumary teeth?
Answer: Rudimentary Supplemental
Q: Syndromes associated with supernumary teeth?
Answer: Hallerman-Streiff Apert's Oro-facial-digital syndrome Cleidocranial Dysplasia Gardern's
Cleft palate Sturge Weber Down syndrome Crouzons
Q: Incidence of congenital agenesis?
Answer: 1.5-10% in Permanenet (<1% Primary) (more common than supernum)
Q: Most common congenitally missing tooth
Answer: 3rd Molars Mandibular 2nd premolars Maxillary Laterals Maxillary 2nd Premolars
Q: Syndromes associated with tooth agenesis
Answer: Cleft palate Ectodermal dysplasia Downs Ellis van Crevald (Chondroectodermal
dysplasia) Oro-Facial-Digital Hallerman-Streiff Crouzons
, Q: Clinical symptoms of Oro-Facial- Digital
Answer: Missing/asymmetry with digits Think frenal attachments Anomalous anterior teeth
Hypoplasia of alar cartilage
Q: Syndromes that manifest as Hypo and Hyperdontia
Answer: Hallerman Streiff Oro facial digital Crouzons Down
Q: Lit: Agenesis of mandibular centrals is also associated with _____ agenesis in males
Answer: Laterals
Q: Lit: Hyper or hypodontia is associated with delayed dental development?
Answer: Hypodontia
Q: Proliferation defects
Answer: (Cap stage) Defects in size -Fusion -Gemination -Macrodontia -Microdontia
Q: Incidence of both fusion and gemination is? AD/AR/Non hereditary?
Answer: 0.5% AD
Q: Bell - Histodifferentiation defects -- >?
Answer: Amelogenesis Imperfecta Dentinogenesis Imperfecta
Q: AI Type I vs II - AD? AR?
Answer: Type I - AD Type II - AR
Q: Advance Bell - Morphogenesis defects --> ?
Answer: Dens in dente Dens Evaginatus Taurodontism Dilaceration (Defects in form/shape)
Q: Most common tooth for dens in dente
Answer: Maxillary permanent lateral incisor
Q: Most common tooth for dens evaginatus
Answer: Common in Max incisors Laterals 50% Centrals 30% (Most in PERM)
Q: Dens evaginatus associated with what syndromes?
Answer: Sturge webber Rubinstein - Taybi Syndrome
Q: Syndromes associated with Taurodontism?
Answer: Klienfelter's Ectodermal dysplasia Down syndrome Hypotrichosis Oro-facial-Digital
Syndrome Amelogenesis Imperfecta
Q: Lit: Are missing teeth and/or supernumary teeth assocaited with taurodontism?
Answer: Missing teeth ARE related Supernumary are NOT related
