Mandibular Canine

Mandibular Canine

• 1.
  MANDIBULAR CANINE DR AMITHAG, BDS, MDS DEPT OF ORAL AND MAXILLOFACIAL PATHOLOGY
• 2.
  CHRONOLOGY • First evidenceof calcification : 4-5 months • Enamel completed : 6-7 yr • Eruption : 9-10yrs • Root completed : 12-14yrs
• 3.
  AVERAGE DIMENSIONS INMILLIMETERS 2.5 1.07.07.55.57.016.011.0 Curvature of Cervical Line M D Labiolingual Diameter at Cervical Line Labiolingual Diameter at Crest of Curvature Mesiodistal Diameter at Cervical Line Mesiodistal Diameter at Contact Area Root Length Crown Length
• 4.
  LABIAL ASPECT  Mandibularcanine crown is narrower mesiodistally than that of the maxillary canine ( the difference is usually about 1mm )  Mesial outline of the crown is straight and inline with the mesial outline of the root.
• 5.
  • The mesialcusp ridge is smaller than the distal cusp ridge • Cervical line labially has a semi circular curvature apically • Root - apical end is more sharply pointed
• 6.
  LINGUAL ASPECT • Lingualsurface of the crown is flatter • Cingulum – smooth and poorly developed • Lingual ridge – divides mesial and distal lingual fossa • Root – narrower - max. canine
• 7.
  MESIAL ASPECTS • Mandibularcanine has less curvature labially on the crown. • Lingual outline of the crown is curved • Cingulum is not so pronounced • Incisal portion of the crown is thinner labiolingually • The tip of the cusp is more nearly centred over the root
• 8.
  • Cervical linecurves more toward the incisal portion - more on the mesial aspect • The contact area on mesial aspect is in the incisal third • Developmental depression on the root mesially is more pronounced
• 9.
  DISTAL ASPECT • Contactarea on the distal aspect is little higher on the distal third • Curvature of the cervical line is shorter compared to the mesial aspect
• 10.
  INCISAL ASPECT • Likemaxillary canine the labiolingual dimension is more than the mesiodistal dimension • The cusp tip appears inclined in a lingual direction ROOT • The root is shorter by 1 or 2 mm than max. canine • The developmental depression is more pronounced on the lower canine
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