Permanent Mandibular

Canine

By Dr Nesreen Nabil

1.The chronology of the tooth.2.The morphology of the tooth.3.Its clinical consideration.4.Points of difference with the upper

canine.

At the end of this lecture you must know:

General characteristics of the permanent

canines•All canines are the “Cornerstone” of the mouth•Extra bulk of bone on the labial portion of root called Canine eminence which help to support facial muscles•Longest root of any teeth making the canines the most stable teeth •In function, support the incisors and the premolars (makes for a smooth transition)•Longest tooth cervicoinsically

Chronology

• 1st. Evidence of calcification:• Crown completed:• Eruption:• Root completion:

4 -5 monthes6 -7 years.9 – 10 years.12 – 14 years.

MorphologyLabial Aspect:

( Facial Aspect )I ) Crown:

1. geometric outline: 2. surface outlines: - mesial outline: ( including

contact area ) - Distal outline: ( including

contact area )

- cervical outline: - incisal outline: ( including

cusp tip ) 3. surface describtion:II) Root: 1. Mesial outline: 2. Distal outline: 3. Apex: 4. surface describtion:

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MorphologyLingual Aspect: I ) Crown: 1. geometric outline: 2. surface outlines: - mesial outline: ( including

contact area ) - Distal outline: ( including

contact area )

- cervical outline: - incisal outline: ( including

cusp tip ) 3. surface describtion:II) Root: 1. Mesial outline: 2. Distal outline: 3. Apex: 4. surface describtion:

MorphologyMesial Aspect:

( Proximal Aspect )I ) Crown:

1. geometric outline: 2. surface outlines: - Labial outline: ( including crest

of curvature )

- Lingual outline: ( including crest of curvature )

- Cervical outline: 3. surface describtion.II) Root: 1. Labialal outline. 2. Lingual outline. 3. Apex. 4. surface describtion.

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MorphologyDistal Aspect:

( Proximal Aspect )I ) Crown:

1. geometric outline: 2. surface outlines: - Labial outline ( including crest of

curvature )

- Lingual outline ( including crest of curvature )

- cervical outline. 3. surface describtion.II) Root: 1. Labial outline. 2. Lingual outline. 3. Apex. 4. surface describtion.

MorphologyIncisal Aspect: 1. geometric outline: 2. dimensions. 3. surface outlines: - Labial outline. - Lingual outline. - cusp tip and cusp slopes. 3. surface describtion.

Clinical consideration

So we must choose conservative treatment as first choice as we can to preserve the normal facial shape

1. Anatomical

2. Esthetical

This tooth don’t appear much as the upper canine but its esthetic must be considered.

3. Variations of the mandibular canine

ShapeOn occasion, the root is bifurcated near its tip. The double root may, or may not be accompanied by deep depressions in the root.

SizeOn occasion, the root is unusually long or unusually short.

Position

The canine may be malposed or impacted.