Canines Canine Maxillary Canine The labiolingual measurement of
Canines
尖 牙 (Canine)
Maxillary Canine The labiolingual measurement of the crown is about 1 mm greater than that of the maxillary central incisor. The mesiodistal measurement is approximately 1 mm less.
Labial Aspect
Lingual Aspect
Mesial Aspect Distal Aspect
Root
Labial Aspect
Lingual Aspect
Mesial Aspect Distal Aspect
Root
Premolar
前磨牙 Premolar
Maxillary first premolar Characteristics: 1 buccolingual measurement>mesiodistal measurement. 2 Broader contact areas 3 Contact areas more nearly at the same level 4 Less curvature of the cervical line mesially and distally. 5 Shorter crown, cervico-occlusally when compared with anterior teeth.
Occlusal Aspect: • • Six-sided or hexagonal figure Cusp: buccal cusp , lingual cusp Ridge : marginal ridge, cusp ridge Fossa: mesial triangular fossa, distal triangular • Developmental groove: central development groove,
Labial Aspect Lingual Aspect
Mesial Aspect
Distal Aspect
Root
Maxillary second premolar The maxillary second premolar is less angular, giving a more rounded effect to the crown from all aspects. It has a single root.
Labial Aspect
Lingual Aspect
Mesial Aspect
Distal Aspect
Labial Aspect
Lingual Aspect
Distal Aspect
Labial Aspect
Lingual Aspect
Mesial Aspect
Distal Aspect
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