Dental Anatomy: Permanent Canines

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Questions and Answers

Where is the mesial contact area located on a mandibular canine?

In the cervical third

Near the apical foramen

Closer to the incisal edge (correct)

In the middle third

Which of the following best describes the distal surface of a mandibular canine?

It tends to show a slight depression near the cervical area, and has a more rounded incisal edge (correct)

It is straighter than the mesial surface and has a contact area closer to the incisal edge

It is convex and has a contact area located at the junction of the incisal and middle thirds

It has a more pronounced labial ridge than the mesial surface

What is the primary function of canine teeth?

Cutting and slicing food

Tearing and holding food (correct)

Mixing and churning food

Grinding and crushing food

What is the shape of the incisal edge of a mandibular canine?

Asymmetrical diamond-shaped (C) Signup and view all the answers

What makes the canines considered the 'cornerstones' of the dental arch?

Their position and role in guiding the bite and maintaining dental stability. (B) Signup and view all the answers

Which statement accurately describes the labiolingual width of the mandibular canine?

It is greater than the mesiodistal width (C) Signup and view all the answers

Compared to the maxillary canine, which of the following is true about the mandibular canine?

Has a blunter cusp tip and exhibits a flatter labial surface (B) Signup and view all the answers

When does the enamel of the canine teeth complete formation?

6-7 years (D) Signup and view all the answers

Which of the following is a characteristic of the labial surface of the maxillary canine?

Convex with a pronounced middle labial ridge. (A) Signup and view all the answers

What is the most accurate description of the lingual surface of a mandibular canine?

Concave, with well-developed anatomy (C) Signup and view all the answers

What is the approximate root length of a mandibular canine?

17 mm (B) Signup and view all the answers

What is a distinguishing feature of the lingual surface of maxillary canines?

A concave surface with a prominent cingulum and fossae (A) Signup and view all the answers

Where is the contact area located on the mesial surface of maxillary canines?

At the junction of the incisal and middle thirds. (A) Signup and view all the answers

What is a key characteristic of the labial surface of the mandibular canine?

Convex with a pronounced middle labial ridge (D) Signup and view all the answers

How does the profile of the mesial surface compare to the distal surface of the maxillary canine?

The mesial profile is straighter compared to the convex distal profile. (B) Signup and view all the answers

Which surface of the maxillary canine has a contact area located in the middle third?

Distal surface. (D) Signup and view all the answers

What characteristic distinguishes the incisal edge of the maxillary canine?

Symmetrical and slightly more elongated in the mesiodistal direction. (B) Signup and view all the answers

What is the root shape of maxillary canines?

Long, conical, and tapering toward the apex. (D) Signup and view all the answers

What is a common clinical challenge associated with maxillary canines?

Impaction may require orthodontic or surgical intervention. (A) Signup and view all the answers

How do maxillary canines contribute to occlusion?

They act as a cornerstone of the arch, providing canine guidance. (A) Signup and view all the answers

What is the mesiodistal diameter of the crown of a maxillary canine?

7 mm (A) Signup and view all the answers

Why might maxillary canines pose restorative challenges?

Their prominent roots require careful endodontic treatment. (D) Signup and view all the answers

What is a notable feature of the crown of a maxillary canine compared to the maxillary canine?

Less pronounced labial ridge. (A) Signup and view all the answers

How does the maxillary canine affect facial aesthetics?

Plays a crucial role in smile aesthetics. (A) Signup and view all the answers

Study Notes

Permanent Canines

Canines are designed to tear and hold food.
They are the cornerstone of the dental arch.
They contribute to the aesthetics and stability of the mouth.
They are the longest teeth and roots in the mouth.
The initiation of development is 4-5 months.
The completion of enamel development is 6-7 years.
Eruption: Maxillary – 11-12 years, Mandibular – 9-10 years.
Root completion: Maxillary – 13-15 years, Mandibular – 12-14 years.
Maxillary numbering system: Universal – 6, Left – 11, Palmer – 3, International - 13.
Mandibular numbering system: Universal – 22, Left – 27, Palmer – 3, International – 33.
Maxillary canine crown: Convex with a pronounced middle labial ridge. Mesial slope is shorter than distal, sharp cusp tip. Prominent esthetic and functional role.
Maxillary canine lingual surface: Concave with well-developed anatomy. Features: prominent cingulum, marginal ridges and fossae. Deep grooves are prone to decay.
Maxillary canine mesial surface: Triangular with well-defined CEJ curvature. Features: contact area at the junction of the incisal and middle thirds.
Maxillary canine distal surface: Similar to the mesial but more convex. Features: contact area located in the middle third.
Maxillary canine incisal edge: Asymmetrical diamond-shaped outline. Cusp tip is centered labiolingually and slightly mesial to the center. Mesial appears bulkier than the distal. Pronounced labial ridge is visible. Labiolingual width is greater than mesiodistal. Provides tearing and guiding functions in occlusion.
Maxillary canine root features: Long, conical, tapering towards the apex. Oval cross section, possible longitudinal grooves. Long root ensures stability.
Maxillary canine dimensions: Crown length – 10 mm, Root length – 17 mm, Mesiodistal diameter – 7.5 mm, Labiolingual diameter – 8 mm.
Maxillary canine clinical relevance: Impaction and Eruption challenges. The maxillary canine is the second most frequently impacted tooth after third molars. This occurs due to its long eruption path and delayed eruption compared to other teeth. Impaction may require orthodontic or surgical intervention. Esthetic and functional importance. Plays a crucial role in smile esthetics due to its prominent position and unique shape. Contributes to facial symmetry and support for the upper lip. Guidance in occlusion. Acts as a cornerstone of the arch, providing canine guidance during lateral movements of the jaw. Protects posterior teeth from excessive wear during excursive movements. Periodontal concerns. Pronounced labial convexity and prominent cingulum can make plaque removal challenging. Restorative challenges. Large, prominent roots require careful endodontic treatment. Restorative or prosthetic work should preserve the canine’s esthetic and functional integrity.

Mandibular Canines

Mandibular canine abutment for prothetics: Strong and well-anchored roots make mandibular canines excellent abutments for bridges and removable partial dentures.
Mandibular canine root morphology challenges: Roots are often curved distally and may have longitudinal grooves, complicating root canal therapy and extraction. Bifurcated roots are rare but possible, adding to complexity during treatment.
Mandibular canine wear patterns: More prone to wear due to involvement in lateral movements, less prominent cusp tips. Occlusal wear may flatten the cusp over time, requiring monitoring in older patients.
Mandibular canine esthetics: Less critical to esthetics than maxillary canines.
Mandibular canine orthodontic considerations: Often used as anchor points in orthodontic treatments due to their strong root structure.

General

Both maxillary and mandibular canines are essential for guiding the bite.
Maxillary canines play a more prominent role due to a longer root and more pronounced cusp.

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Description

This quiz covers the essential features and characteristics of permanent canines in human dental anatomy. Participants will learn about their role, development stages, eruption timelines, and numbering systems. Test your knowledge on the function and aesthetics of these crucial teeth!