In universal tooth numbering system, #16 refers to ()
A. The maxillary right third molar
B. The maxillary left third molar
C. The mandibular left third molar
D. The mandibular right first molar
E. The maxillary left first molar
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Which of the following is not connected to the periodontium via the lateral accessory foramina? ()
A. The root canal
B. The intercanal anastomoses
C. The lateral canal
D. The apical ramification
E. None of the above
Which of the following descriptions of the pulp cavity of the maxillary first molar is incorrect?()
A. The buccolingual diameter of the pulp chamber is larger than the height of the pulp chamber.
B. The roof of the pulp chamber is concave and the lowest point is near the middle third of the crown.
C. The mesiobuccal and the mesiolingual pulp horns are near the middle third of the crown.
D. The distobuccal and the distolingual pulp horns are near the cervical third of the crown.
E. About 63% of the mesiobuccal root canals are bicanal or single-bicanal type.
What is the relationship between the distal surfaces of the maxillary and the mandibular deciduous second molar at the age of 4 to 6 years?()
A. The distal surface of the mandibular deciduous second molar moves to the mesial of the maxillary deciduous second molar.
B. The distal surface of the mandibular deciduous second molar will move to the distal side of the maxillary deciduous second molar.
C. The distal surfaces of the maxillary and the mandibular deciduous second molars are aligned with each other and form a vertical plane.
D. The relationship is uncertain.
E. None of the above is true.
As for the normal signs of the intercuspal occlusion, which one is NOT correct? ()
A. Each tooth contacts two teeth on the opposite jaw.
B. There is normal canine relationship.
C. The first molars are in neutral relationship.
D. There is normal overbite and overjet of anterior and posterior teeth.
E. The median lines of the upper and lower dentition are in a line and facing the maxillary labial frenum.
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