NEW 2025 NBDE PART 1 EXAM
QUESTIONS WITH CORRECT ANSWERS
Dilaceration is a significant angulation or curvature in a tooth's root and crown
that is hypothesized to occur from trauma during development.
Hutchinson's Incisors (Syphilitic Hypoplasia) - ANSWER When an incisor is
born without the middle lobe due to a prenatal syphilis infection.
Mulberry Molars (Syphilitic Hypoplasia) - ANSWER: Syphilitic infection
during development causes occlusal table constriction and disordered surface
morphology.
Turner's Tooth (Turner's Hypoplasia) - ANSWER A permanent tooth erupts
into the mouth with a hypocalcification area as a result of an abscessed or
traumatized primary tooth.
Because it is hypocalcified, it is more susceptible to caries.
Anodontia/hypodontia/
Oligodontia/hyperdontia; anything with
Dontia is a genetic aetiology during the LAMINA stage.
Hyperdontia is characterized by the presence of extra teeth.
Hypodontia - ANSWER: Too few teeth. The most frequent teeth are third
molars, second premolars, and MX laterals.
(Total) Anodontia: all teeth are congenitally absent. Has a genetic basis.
Partial Anodontia - ANSWER: One or more missing teeth.
Hereditary factors prevent the beginning of tooth buds.
, The most common missing teeth are the third molars, maxillary lateral incisors,
and mandibular 2nd premolars.
Canines are the least common missing teeth.
Oligiodontia - ANSWER: Six or more congenitally absent teeth, except the
third molars
aberrant tooth size - ANSWER: Caused by distance at the bell stage of
morphodifferentiation.
The most prevalent cause is genetic (all with
Dontia has a genetic etiology.
True Macrodontia - Answer: ALL teeth are enlarged.
False Macrodontia - ANSWER: One or a few teeth are overly huge.
Most typically observed in canines, incisors, and mandibular third molars.
True Microdontia - ANSWER: All teeth are unusually tiny. A rare condition.
Observed in cases of growth hormone deficiency dwarfism.
Answer: False microdontia is the most prevalent tooth size abnormality.
♣ Teeth appear smaller than normal.
♣ Typically affects maxillary lateral incisors (Peg lateral) and maxillary third
molars.
Microdontia - Teeth are too tiny. Most typically, a peg lateral incisor. False
microdontia primarily affects permanent maxillary laterals (peg laterals).
Dental Fluorosis - ANSWER: Mottled enamel
Enamel hypomaturation caused by excessive fluoride consumption during the
formation process.
Forms caries-resistant teeth.
QUESTIONS WITH CORRECT ANSWERS
Dilaceration is a significant angulation or curvature in a tooth's root and crown
that is hypothesized to occur from trauma during development.
Hutchinson's Incisors (Syphilitic Hypoplasia) - ANSWER When an incisor is
born without the middle lobe due to a prenatal syphilis infection.
Mulberry Molars (Syphilitic Hypoplasia) - ANSWER: Syphilitic infection
during development causes occlusal table constriction and disordered surface
morphology.
Turner's Tooth (Turner's Hypoplasia) - ANSWER A permanent tooth erupts
into the mouth with a hypocalcification area as a result of an abscessed or
traumatized primary tooth.
Because it is hypocalcified, it is more susceptible to caries.
Anodontia/hypodontia/
Oligodontia/hyperdontia; anything with
Dontia is a genetic aetiology during the LAMINA stage.
Hyperdontia is characterized by the presence of extra teeth.
Hypodontia - ANSWER: Too few teeth. The most frequent teeth are third
molars, second premolars, and MX laterals.
(Total) Anodontia: all teeth are congenitally absent. Has a genetic basis.
Partial Anodontia - ANSWER: One or more missing teeth.
Hereditary factors prevent the beginning of tooth buds.
, The most common missing teeth are the third molars, maxillary lateral incisors,
and mandibular 2nd premolars.
Canines are the least common missing teeth.
Oligiodontia - ANSWER: Six or more congenitally absent teeth, except the
third molars
aberrant tooth size - ANSWER: Caused by distance at the bell stage of
morphodifferentiation.
The most prevalent cause is genetic (all with
Dontia has a genetic etiology.
True Macrodontia - Answer: ALL teeth are enlarged.
False Macrodontia - ANSWER: One or a few teeth are overly huge.
Most typically observed in canines, incisors, and mandibular third molars.
True Microdontia - ANSWER: All teeth are unusually tiny. A rare condition.
Observed in cases of growth hormone deficiency dwarfism.
Answer: False microdontia is the most prevalent tooth size abnormality.
♣ Teeth appear smaller than normal.
♣ Typically affects maxillary lateral incisors (Peg lateral) and maxillary third
molars.
Microdontia - Teeth are too tiny. Most typically, a peg lateral incisor. False
microdontia primarily affects permanent maxillary laterals (peg laterals).
Dental Fluorosis - ANSWER: Mottled enamel
Enamel hypomaturation caused by excessive fluoride consumption during the
formation process.
Forms caries-resistant teeth.
