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Physiologic Form of Tooth and Periodontium Multiple Choice Questions
- The term” contact point” which is often used to designate the contact of teeth i the same arch is a:
A. Synonym
B. Antonym
C. Misnomer
D. Laevonomer
- The curvature of the cervical line of most teeth will be approximately:
A. 2 mm less distally than mesially
B. 1 mm less distally than mesially
C. 2 mm less lingually than buccally
D. 1 mm less lingually than buccally
- In primates; a tooth with single conical cusp and single root is seen in:
A. Haplodont
B. Heterodont
C. Acrodont
D. Thecodont
- The primary center of formation of each lobe is present in:
A. Apex of the root
B. Tip of the cusp
C. Centre of the crown
D. Centre of the tooth
- The interdental papilla is located in the:
A. Facial embrasure
B. Lingual embrasure
C. Cervical embrasure
D. Occlusal embrasure
- Protective crests of contour on buccal and lingual surfaces are found:
A. In the middle third of the lingual
B. Nearest the occlusal third of the lingual
C. In the cervical third of the buccal
D. Both A and C
- Buccal surface of posterior teeth are wider than lingual surface mesiodistally except in:
A. Maxillary first molar
B. Mandibular second premolar
C. Mandibular first molar
D. Maxillary second premolar
- Which of the following are the junctions of contact areas?
A. Distribution of occlusal stresses
B. Protection of periodontium
C. Stabilization of dental arches
D. All of the above
- Which four mandibular teeth are so aligned that when viewed from the occlusal, a straight line may be drawn bisecting the contact areas?
A. 5,6,7,8
B. 4,5,6,7
C. 3,4,5,6
D. 2.3.4.5
- Contact areas of anterior teeth which are placed in Centre of middle third:
A. Mesial contacts of maxillary lateral and canine
B. Distal contacts of maxillary centrals and laterals
C. Distal contacts of maxillary laterals and canine
D. Mesial contacts of maxillary first and second premolar
- Which of the following do not contribute to arch stability ?
A. Cusps
B. Root forms
C. Embrasures
D. Periodontal fibers
- Mesial contact area of the permanent canine is at the:
A. Middle third
B. Junction of the incisal and middle thirds
C. Junction of the middle and cedrvical thirds
D. None of the above
- Distal contact of upper first premolar is:
A. Lower than mesial contact area
B. Little cervical to junction of occlusal and middle third of crown
C. Higher than mesial contact area
D. A and B
- The contact area on the distal surface of a maxillary first premolar should be placed in:
A. Middle 3rd of proximal surface with lingual embrasure greater than the facial embrasure
B. Occlusal 3rd of proximal surface with the lingual embrasure greater than facial embrasure
C. Occlusal 3rd of proximal surface with facial embrasure greater than lingual embrasure
D. Middle 3rd with facial embrasure greater than the lingual embrasure
- The tooth that is commonly seen in an abnormal relation and contact with its adjacent teeth of the same arch is:
A. Mandibular first premolar
B. Mandibular lateral incisor
C. Maxillary central incisor
D. Maxillary lateral incisor
- Largest embrasure lies between:
A. Maxillary central incisors
B. Maxillary central and lateral incisor
C. Maxillary canine and first premolar
D. Maxillary lateral incisor and canine
- The embrasure areas in the following areas are contentious:
A. Labial and lingual
B. Lingual and Occlusal
C. Incisal and Occlusal
D. Labial and Occlusal
- All embrasure spaces are reflection of the:
A. Form of the teeth involved
B. Size of the teeth involved
C. Eruption sequence involved
D. None of the above
- The biting forces at molar region during mastication is:
A. 20 to 55 pounds
B. 30 to 75 pounds
C. 50 to 75 pounds
D. 90 to 200 pounds
- The faciolingual angulation of the upper central incisor is approximately:
A. 20°
B. 28°
C. 33°
D. 38°
- All are true about calciotraumatic line, except:
A. Due to caries
B. Due to death of odontoblastic layer
C. It remains after caries is removed
D. Because of odontoblastic migration from cell rich zone
- Posterior embrasures are generally larger on the lingual than on the facial, with the contact area within the facial moiety, except between maxillary:
A. Premolars
B. 1st and 2ndmolar
C. 1st premolar and cane
D. First molar and 2nd premolar
- The distance from the CEJ to the alveolar crest normally is:
A. 1 – 1.5 mm
B. 2 mm
C. 2 – 2.3 mm
D. 3 mm
- Which teeth show less curvature on the crown above the cervical line than any other teeth?
A. Maxillary anterior
B. Mandibular canine
C. Mandibular anteriors
D. Maxillary canine
- Which anterior teeth have both mesial and distal contact areas of at the incisal third?
A. Mandibular centrals
B. Mandibular laterals
C. Both A and B
D. None of the above
- The contact area on the distal side of a maxillary first premolar is located?
A. Middle of the middle third with buccal embrasure wider than lingual
B. Middle of the middle third with lingual embrasure wider than buccal
C. Litter cervical to the junction of occlusal and middle third of the crown with wide occlusal embrasure
D. Cervical third with buccal embrasure wider than lingual embrasure
- Generally , contact areas between posterior teeth are located in which directions from the centre of the proximal surface?
A. Facially and occlusally
B. Facially and gingivally
C. Lingually and gingivally
D. Lingually and occlusally
- An imaginary occlusal curve that contacts the buccal and lingual cusp tips of mandibular buccal teeth is called the:
A. Catenary curve
B. Curve of spee
C. Monson curve
D. Wilson curve
- The widest incisal embrasure is normally found between which of the following permanent maxillary teeth:
A. Central incisors
B. Central and lateral incisors
C. Lateral incisor and canine
D. First and 2nd premolar
- Divergence from contact area in proximal surfaces causes embrasures:
A. Facially
B. Lingually
C. Cervically
D. Facially, lingually , cervically & occlusally
- The largest embrasure in posterior teeth is the:
A. Buccal
B. Distal
C. Lingual
D. Occlusal
Physiologic Form of Tooth and Periodontium objective questions with answers pdf download online exam test