Mandibular canine

Mandibular canines in the human mouth

The mandibular canine is one of the canine teeth located in the mandible, or lower jaw, of the human dentition. It is also known as the lower canine or cuspid. The mandibular canine is a critical component of the dental arch and plays a significant role in the occlusion and aesthetics of the oral cavity.

Anatomy

The mandibular canine is characterized by its single, pointed cusp, which is used for tearing food. It is typically longer than the other teeth in the mandibular arch, with a prominent crown and a long root. The root of the mandibular canine is usually the longest in the mandibular arch, providing stability and support.

Crown

The crown of the mandibular canine is narrower than that of the maxillary canine, with a more pronounced cingulum on the lingual surface. The mesial and distal surfaces of the crown converge towards the incisal edge, giving the tooth a characteristic pointed appearance.

Root

The root of the mandibular canine is typically single and conical, with a slight distal inclination. It is often longer than the roots of the adjacent incisors and premolars, contributing to the tooth's anchorage in the jaw.

Function

Mandibular canines play a crucial role in the mastication process. Their pointed cusps are designed to pierce and tear food, complementing the grinding action of the molars. Additionally, they help maintain the vertical dimension of the face and contribute to the canine guidance in occlusion, which protects the posterior teeth during lateral excursions of the jaw.

Development

The mandibular canines typically erupt between the ages of 9 and 10 years. They are preceded by the primary canines, which are shed to make way for the permanent teeth. The development of the mandibular canines is a critical phase in the transition from primary to permanent dentition.

Clinical Significance

Mandibular canines are often involved in orthodontic treatments due to their strategic position in the dental arch. They may be subject to impaction or malposition, requiring intervention to ensure proper alignment and function. Additionally, the long roots of the mandibular canines make them ideal candidates for dental implants and prosthetic support in cases of tooth loss.

Related Pages

• Maxillary canine
• Human tooth
• Dental anatomy
• Orthodontics