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Test Bank For Organic Chemistry 6th Edition By Brown
Original price was: $25.00.$20.00Current price is: $20.00.
Test Bank For Oral Pathology for the Dental Hygienist 6th Edition By Ibsen RDH MS
Original price was: $25.00.$20.00Current price is: $20.00.
Test Bank For Oral Pathology for the Dental Hygienist 6th Edition By Ibsen RDH MS
Chapter 5: Developmental Disorders
Test Bank
MULTIPLE CHOICE
1.Which term describes a disorder present at and existing from the time of birth?
a. Anomaly c. Congenital
b. Inherited d. Developmental
ANS: C
Feedback
A An anomaly is a marked deviation from normal that can be the result of congenital or hereditary defects.
B Inherited disorders are caused by abnormalities in the genetic makeup transmitted from parent to offspring.
C Correct! A congenital disorder is present at and existing from the time of birth.
D Developmental disorders occur when failure or disturbances occur during the complex series of cell division, multiplication, or differentiation.
REF: 155-156
2.Which term describes partial anodontia or the lack of one or more teeth?
a. Anodontia c. Hypodontia
b. Ankylosed d. Gemination
ANS: C
Feedback
A Anodontia is the congenital lack of teeth.
B Ankylosed teeth are those fused to alveolar bone, usually retained deciduous teeth.
C Correct! Hypodontia defines partial anodontia or the lack of one or more teeth.
D Gemination occurs when a single tooth germ attempts to divide, resulting in the incomplete formation of two teeth.
REF: 155 | 169
3.Which epithelial lined tract is a developmental anomaly located in the corners of the mouth?
a. Commissural lip pit c. Fistula
b. Angular cheilitis d. Congenital lip pit
ANS: A
Feedback
A Correct! The commissural lip pits are epithelial lined blind tracts located in the corners of the mouth.
B Angular cheilitis is often caused by Candida organisms. It appears as erythema or fissuring at the labial commissures.
C A fistula is a drainage tract from an area of infection.
D A congenital lip pit occurs near the midline of the vermilion boarder of the lip, and it appears as a depression.
REF: 159
4.The formation of dentin is called:
a. amelogenesis. c. dens in dente.
b. dentinogenesis. d. odontogenesis.
ANS: B
Feedback
A Amelogenesis is the formation of enamel.
B Correct! Dentinogenesis is the formation of dentin.
C Dens in dente is a developmental anomaly called a tooth within a tooth.
D Odontogenesis is tooth development in the human embryo.
REF: 155 | 157
5.The first branchial arch divides into two maxillary processes and the:
a. mandibular process. c. median nasal process.
b. frontal process. d. globular process.
ANS: A
Feedback
A Correct! The first branchial arch divides into two maxillary processes and the mandibular process.
B The frontal process is a structure above the first branchial arch.
C The median nasal process develops from the frontal process.
D The globular process develops from the median nasal process.
REF: 156
6.The body of the tongue develops from the:
a. frontal process. c. second branchial arch.
b. first branchial arch. d. third branchial arch.
ANS: B
Feedback
A The frontal process is above the first branchial arch.
B Correct! The body of the tongue develops from the first branchial arch.
C The second and third branchial arches form the base of the tongue.
D The third and second branchial arches form the base of the tongue.
REF: 156
7.Which term defines the joining of two adjacent teeth by cementum only?
a. Twinning c. Cementogenesis
b. Concrescence d. Fusion
ANS: B
Feedback
A Twinning occurs when a single tooth germ begins to divide, resulting in the incomplete formation of two teeth.
B Correct! Concrescence is the joining of two or more adjacent teeth by cementum.
C Cementogenesis is the formation of cementum.
D Fusion is the union of two adjacent tooth germs.
REF: 155 | 172
8.Odontogenesis in the human embryo occurs at:
a. 3 weeks. c. 5 months.
b. 5 weeks. d. 1 month.
ANS: B
Feedback
A The face begins proliferation and differentiation at 3 weeks.
B Correct! Odontogenesis in the human embryo occurs at 5 weeks.
C Formation of hard dental tissues begins at 5 months.
D There is no initial odontogenesis at 1 month in utero.
REF: 157
9.
This patient exhibits an extensive adhesion of the tongue to the floor of the mouth caused by the short lingual frenum. You suspect:
a. ankyloglossia. c. lingual thyroid.
b. frenectomy. d. total ankyloglossia.
ANS: A
Feedback
A Correct! Ankyloglossia is an extensive adhesion of the tongue to the floor of the mouth caused by a short lingual frenum.
B A frenectomy is a surgical procedure performed to remove a portion of the lingual frenum in the treatment of ankyloglossia.
C Lingual thyroid is a smooth nodular mass at the base of the tongue posterior to the circumvallate papillae and near the midline.
D Total ankyloglossia rarely occurs.
REF: 158
10.Clinically the lingual thyroid nodule appears as a smooth nodular mass:
a. at the base of the dorsal tongue posterior to the circumvallate papillae.
b. on the anterior ventral tongue.
c. on the lateral borders of the middle third of the tongue.
d. anterior to the circumvallate papillae.
ANS: A
Feedback
A Correct! Clinically the lingual thyroid nodule appears as a smooth nodular mass at the base of the dorsal tongue, posterior to the circumvallate papillae.
B The lingual thyroid nodule is not found on the anterior ventral tongue.
C The lingual thyroid nodule is not found on the lateral borders of the middle third of the tongue.
D The lingual thyroid nodule is not found anterior to the circumvallate papillae.
REF: 159
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