NBDE Dental Anatomy Misc. UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What is it called when a tooth is fused to the alveolar bone?
What has the tooth lost in order for this to happen? - CORRECT ANSWER - Ankylosis
PDL
How is Ankylosis Initiated? - CORRECT ANSWER - Infection or trauma to the PDL
The excessive formation of cementum around the root of a tooth after the tooth has erupted. -
CORRECT ANSWER - Hypercementosis
How is hypercementosis initiated? - CORRECT ANSWER - Trauma, metabolic
dysfunction, or periapical inflammation
The fusion or growing together of two adjacent teeth at the root through the cementum only. -
CORRECT ANSWER - Concrescence
Supernumary tooth between the maxillary centrals - CORRECT ANSWER - Mesiodens
How does the max. arch generally compare with the mand. arch? - CORRECT ANSWER -
It is slightly longer
The sum of the M-D diameter of the maxillary teeth is about _____. - CORRECT
ANSWER - 128 mm
The sum of the M-D diameter of the mandibular teeth is about _____. - CORRECT
ANSWER - 126 mm
, In general the primary arch is more _____ than the permanent arch. - CORRECT
ANSWER - Circular
The abnormal or pathologic wearing away of tooth structure by mechanical means. - CORRECT
ANSWER - Attrition
Caused by the use of a hard toothbrush and/or a horizontal brushing stroke and/or a gritty
dentrifice. - CORRECT ANSWER - Toothbrush Abrasion
What features most often occurs from toothbrush abrasion? - CORRECT ANSWER - V-
shaped wedges at the cervical margin in the canines and pre-molars
What is caused by chewing or biting hard foods or objects or chewing tobacco? - CORRECT
ANSWER - Occlusal Abrasion
What features does occlusal abrasion result in? - CORRECT ANSWER - Flattened cusps
on all posterior teeth and worn incisal edges.
The wearing away of enamel and dentin from the normal function or, more commonly, from
excessive grinding or gritting together of teeth. - CORRECT ANSWER - Attrition
(Bruxism)
What are the most noticeable effects of attrition? - CORRECT ANSWER - Polished facets
flat incisal edges
discolored tooth surface
exposed dentin
Where do facets from attrition usually develop? - CORRECT ANSWER - linguoincisal of
Max. central incisors
ACTUAL Exam Questions and CORRECT
Answers
What is it called when a tooth is fused to the alveolar bone?
What has the tooth lost in order for this to happen? - CORRECT ANSWER - Ankylosis
PDL
How is Ankylosis Initiated? - CORRECT ANSWER - Infection or trauma to the PDL
The excessive formation of cementum around the root of a tooth after the tooth has erupted. -
CORRECT ANSWER - Hypercementosis
How is hypercementosis initiated? - CORRECT ANSWER - Trauma, metabolic
dysfunction, or periapical inflammation
The fusion or growing together of two adjacent teeth at the root through the cementum only. -
CORRECT ANSWER - Concrescence
Supernumary tooth between the maxillary centrals - CORRECT ANSWER - Mesiodens
How does the max. arch generally compare with the mand. arch? - CORRECT ANSWER -
It is slightly longer
The sum of the M-D diameter of the maxillary teeth is about _____. - CORRECT
ANSWER - 128 mm
The sum of the M-D diameter of the mandibular teeth is about _____. - CORRECT
ANSWER - 126 mm
, In general the primary arch is more _____ than the permanent arch. - CORRECT
ANSWER - Circular
The abnormal or pathologic wearing away of tooth structure by mechanical means. - CORRECT
ANSWER - Attrition
Caused by the use of a hard toothbrush and/or a horizontal brushing stroke and/or a gritty
dentrifice. - CORRECT ANSWER - Toothbrush Abrasion
What features most often occurs from toothbrush abrasion? - CORRECT ANSWER - V-
shaped wedges at the cervical margin in the canines and pre-molars
What is caused by chewing or biting hard foods or objects or chewing tobacco? - CORRECT
ANSWER - Occlusal Abrasion
What features does occlusal abrasion result in? - CORRECT ANSWER - Flattened cusps
on all posterior teeth and worn incisal edges.
The wearing away of enamel and dentin from the normal function or, more commonly, from
excessive grinding or gritting together of teeth. - CORRECT ANSWER - Attrition
(Bruxism)
What are the most noticeable effects of attrition? - CORRECT ANSWER - Polished facets
flat incisal edges
discolored tooth surface
exposed dentin
Where do facets from attrition usually develop? - CORRECT ANSWER - linguoincisal of
Max. central incisors
