A. Within the incisor thirds
B. At the junction of middle and cervical thirds
C. At the linguo cervical ridges
D. Immediately incisal to cingulam
✅ The correct answer is option A. Within the incisor thirds.
Oral Anatomy
First evidence of calcification of maxillary permanent central incisors occurs at_____________?
A. 3-4 months
B. 10-12 months
C. 2-3 years
D. 3-4 years
✅ The correct answer is option A. 3-4 months.
Which of the following is not a structural element of the temporomandibular joint ?
A. Sigmoid notch
B. Articular disc
C. Capsular ligament
D. Joint cavities
✅ The correct answer is option A. Sigmoid notch.
All of the following muscles are elevators of the mandible except______________?
A. Digastric
B. Massetor
C. Medial pterygoid
D. Temporalis
✅ The correct answer is option A. Digastric.
The most common curvature of the palatal root of maxillary first molar is_____________?
A. Facial
B. Lingual
C. Distal
D. Mesial
✅ The correct answer is option A. Facial.
In primates; a tooth with single conical cusp and single root is seen in________________?
A. Haplodont
B. Heterodont
C. Acrodont
D. Thecodont
✅ The correct answer is option A. Haplodont.
The usual order of appearance of the primary teeth in the mouth is____________?
A. Central incisors, first molars, lateral incisors, second molars, canines
B. Central incisors, lateral incisors, canines, second molars, first molars
C. Central incisors, lateral incisors, first molars canines, second molars
D. Central incisors, lateral incisors, first molars second molars, canines
✅ The correct answer is option C. Central incisors, lateral incisors, first molars canines, second molars.
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
✅ The correct answer is option C. Lateral incisor and canine.
The largest mesiodistal diameter in primary dentition is____________?
A. Mandibular 1st molar
B. Mandibular2nd molar
C. Maxillary 2nd molar
D. None of the above
✅ The correct answer is option B. Mandibular2nd molar.
In occlusion the teeth have_______________?
A. Cusp to cusp contact
B. Edge to edge contact
C. Marginal contact
D. Surface to surface contact
✅ The correct answer is option D. Surface to surface contact.