Canines

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Canines

  1. 1. CANINESCANINESDR. SYED SADATULLAHDR. SYED SADATULLAHIBNSINA NATIONAL COLLEGEIBNSINA NATIONAL COLLEGEJEDDAHJEDDAH
  2. 2. IntroductionCanines are very long and stable teethThere are four canines placed at the corner of the mouth andhence called the ‘corner stones’ of the dentitionThey have a single pointed cusp (also called cuspids)Maxillary canine erupts between 10-12 years and mandibularcanine erupts between 9-10 years of age
  3. 3. Maxillary CanineLabial aspect The crown of maxillary canine is narrower mesiodistally thanthat of maxillary central incisor.• The incisal aspect has a large cusp with a pointed cusp tip• It has two slopes (cusp ridges), the mesial slope being shorterthan the distal slope• The labial surface is smooth and bulky in the middle becauseof the labial ridge
  4. 4. Labial aspectLabial ridgeCusp tipDistal cuspridge Mesial CuspRidge
  5. 5. Lingual aspect• The crown and root are narrower lingually• The cingulum is well developed, large and sometimes pointedlike a cusp• Occasionally a well developed lingual ridge is seen thatdivides the lingual fossa into mesial and distal lingual fossae• Heavy marginal ridges are associated with well formedcingulum and fossae
  6. 6. Lingual aspectCingulumDistal marginal ridgeDistal lingual fossaLingual ridgeMesial marginal ridgeMesial lingual fossa
  7. 7. Mesial aspect• From the mesial aspect canine looks similar but bulkier thanmaxillary central incisor• Maxillary canine is the widest anterior tooth labiolingually• The cervical line curvature is towards the cusp (incisally)• The contact area is near the junction of the incisal and middlethird
  8. 8. Mesial aspect
  9. 9. Distal aspect• Distal surface is very similar to the mesial surface• The cervical line exhibits less curvature• The contact are is near the middle thirdDistal aspect
  10. 10. Incisal aspect• The labiolingual dimension is greater than the mesiodistaldimension• The cusp tip is labial to the centre of the crown labiolinguallyand mesial to the centre mesiodistally• The labial ridge and the cingulum are very noticeable fromthis aspectIncisal aspect
  11. 11. Root – only oneThe root is the longest and strongest of all the teeth in thedentitionThe mesial and distal surfaces of the root have developmentaldepressions.2.5 1.57.08.05.57.517.010.0Curvature of CervicalLineM DLabiolingualDiameter atCervical LineLabiolingualDiameter atCrest of CurvatureMesiodistalDiameter atCervical LineMesiodistalDiameter atContact AreaRootLengthCrownLengthAverage Dimensions in millimeters
  12. 12. Mandibular CanineLabial aspect Mandibular canines are similar to maxillary canines exceptthat they are slightly narrower mesiodistally Mesial outline of the crown is straight and inline with themesial outline of the root The mesial cusp ridge is smaller than the distal cusp ridge
  13. 13. Lingual aspect The lingual surface of the crown is smooth and flat simulatingthe surface of mandibular lateral incisor Cingulum is less prominent and marginal ridges are lessdistinctMesial and Distal aspects These aspects are very similar and the cervical line curvesmore on the mesial aspect The contact area on mesial aspect is in the incisal third and alittle higher on the distal third
  14. 14. Incisal aspect Like maxillary canine the labiolingual dimension is more thanthe mesiodistal dimension The cusp tip appears inclined in a lingual directionRoot The root is shorter by 1 or 2 mm The developmental depression is more pronounced on thelower canine
  15. 15. Labial aspect Lingual aspectMesial aspect Distal aspectIncisal aspect

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