NBDE Dental Anatomy Misc Exam Questions and
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? - Answers-Ankylosis
PDL
.How is Ankylosis Initiated? - Answers-Infection or trauma to the PDL
.The excessive formation of cementum around the root of a tooth after the tooth has
erupted. - Answers-Hypercementosis
.How is hypercementosis initiated? - Answers-Trauma, metabolic dysfunction, or
periapical inflammation
.The fusion or growing together of two adjacent teeth at the root through the cementum
only. - Answers-Concrescence
.Supernumary tooth between the maxillary centrals - Answers-Mesiodens
.How does the max. arch generally compare with the mand. arch? - Answers-It is
slightly longer
.The sum of the M-D diameter of the maxillary teeth is about _____. - Answers-128 mm
.The sum of the M-D diameter of the mandibular teeth is about _____. - Answers-126
mm
.In general the primary arch is more _____ than the permanent arch. - Answers-Circular
.The abnormal or pathologic wearing away of tooth structure by mechanical means. -
Answers-Attrition
.Caused by the use of a hard toothbrush and/or a horizontal brushing stroke and/or a
gritty dentrifice. - Answers-Toothbrush Abrasion
.What features most often occurs from toothbrush abrasion? - Answers-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? -
Answers-Occlusal Abrasion
, .What features does occlusal abrasion result in? - Answers-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. - Answers-Attrition (Bruxism)
.What are the most noticeable effects of attrition? - Answers-Polished facets
flat incisal edges
discolored tooth surface
exposed dentin
.Where do facets from attrition usually develop? - Answers-linguoincisal of Max. central
incisors
facioincisal of mand. canines
linguoincisal of max. canines
.The loss of tooth structure from chemical or non-mechanical means - Answers-Erosion
.What does erosion result from? - Answers-Drinking acidic liquids or eating acidic foods.
Bulimic individuals do to stomach acids
.What surfaces are most affected in erosion? - Answers-Smooth (esp. Lingual) and
occlusal surfaces
.What vitamin deficiency can be involved in cleft lip/ palate/ - Answers-Vitamin B folic
acid
.What are the chemical agents capable of causing developmental abnormalities in utero
called? - Answers-Teratogens
.Developmental abnormalities is related to the _____ and _____ of teratogen
involvement. - Answers-Type, Time
.What is the length of time in which the fetus is most sensitive to teratogen attack? -
Answers-First trimester
.What teratogens are associated with cleft lip and palate? - Answers-Aspirin, valium,
dilantin, smoking
.What teratogens are associated with Microcephaly, hydrocephaly, microphthalmia? -
Answers-Cytomegalovirus, toxoplasma
.What teratogens are associated with Central mid-face discrepency? - Answers-Ethyl
alcohol
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? - Answers-Ankylosis
PDL
.How is Ankylosis Initiated? - Answers-Infection or trauma to the PDL
.The excessive formation of cementum around the root of a tooth after the tooth has
erupted. - Answers-Hypercementosis
.How is hypercementosis initiated? - Answers-Trauma, metabolic dysfunction, or
periapical inflammation
.The fusion or growing together of two adjacent teeth at the root through the cementum
only. - Answers-Concrescence
.Supernumary tooth between the maxillary centrals - Answers-Mesiodens
.How does the max. arch generally compare with the mand. arch? - Answers-It is
slightly longer
.The sum of the M-D diameter of the maxillary teeth is about _____. - Answers-128 mm
.The sum of the M-D diameter of the mandibular teeth is about _____. - Answers-126
mm
.In general the primary arch is more _____ than the permanent arch. - Answers-Circular
.The abnormal or pathologic wearing away of tooth structure by mechanical means. -
Answers-Attrition
.Caused by the use of a hard toothbrush and/or a horizontal brushing stroke and/or a
gritty dentrifice. - Answers-Toothbrush Abrasion
.What features most often occurs from toothbrush abrasion? - Answers-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? -
Answers-Occlusal Abrasion
, .What features does occlusal abrasion result in? - Answers-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. - Answers-Attrition (Bruxism)
.What are the most noticeable effects of attrition? - Answers-Polished facets
flat incisal edges
discolored tooth surface
exposed dentin
.Where do facets from attrition usually develop? - Answers-linguoincisal of Max. central
incisors
facioincisal of mand. canines
linguoincisal of max. canines
.The loss of tooth structure from chemical or non-mechanical means - Answers-Erosion
.What does erosion result from? - Answers-Drinking acidic liquids or eating acidic foods.
Bulimic individuals do to stomach acids
.What surfaces are most affected in erosion? - Answers-Smooth (esp. Lingual) and
occlusal surfaces
.What vitamin deficiency can be involved in cleft lip/ palate/ - Answers-Vitamin B folic
acid
.What are the chemical agents capable of causing developmental abnormalities in utero
called? - Answers-Teratogens
.Developmental abnormalities is related to the _____ and _____ of teratogen
involvement. - Answers-Type, Time
.What is the length of time in which the fetus is most sensitive to teratogen attack? -
Answers-First trimester
.What teratogens are associated with cleft lip and palate? - Answers-Aspirin, valium,
dilantin, smoking
.What teratogens are associated with Microcephaly, hydrocephaly, microphthalmia? -
Answers-Cytomegalovirus, toxoplasma
.What teratogens are associated with Central mid-face discrepency? - Answers-Ethyl
alcohol
