On examination of a 7 years old child , only six permanent teeth are p resent. Which of the following is
most likely to be true?
1. Four of the permanent teeth are molars
2. The child has a delayed eruption
3. At least tour of the teeth are perma nent incisors
4. Three permanent teeth are mandibular and the other three are maxillary
Dental AnatomyAnswer: 1
Which of the following is true regarding maxillary molars?
1. Curve inward more sharply from the medial plane on the buccal than do the mandibular molars
2. By their arrangement and design allow room for the powerful masseter muscle.
3. Are set somewhat lingual to the premolars
4. Show a convergence of their buccal surfaces mesially
Dental AnatomyAnswer: 2
Which of the following devices accurately locates the hinge axis position of the mandible? 1. Kinematic facebow 2. Arbitrary facebow 3. Wax recording device 4. Average value facebow
Dental AnatomyAnswer: 1
Which of the following describes the anatomic progression from mandibular first to third molars? 1. The roots become more divergent. 2. The crowns and roots become longer. 3. The crowns and roots become shorter. 4. The crowns become longer, but the roots get shorter.
Dental AnatomyAnswer: 3
The last permanent incisor to erupt are most likely the
1. mandibular centrals
2. maxilary laterals
3. maxillary third molars
4. maxillary centrals
Dental AnatomyAnswer: 2
Mandibular premolars differ from maxillary premolars in that, mandibular premolars have all of the following characteristics, except
1. have crowns much more rounded and lingual cusp not so strongly developed.
2. have roots much less flattened mesiodistally and seldom bifurcated
3. they are wider mesiodistally
4. have crowns tilted to the lingual in relation to the long axis of the root
Dental AnatomyAnswer: 3
Which of the following is the first formed portion of the dentin? 1. Circumpulpal 2. Intertubular 3. Transparent 4. Mantle
Dental AnatomyAnswer: 4
Which of the following anatomic facts should be considered before scaling a permanent maxillary canine?
1 Presence of proximal groove on dis tal surface
2. Presence of proximal groove on me sial surface
3. Presence of a mesial development depression on the crown
4. Presence of proximal grooves on both mesial and distal surfaces
