Mandibular second premolar

Study entry

Location

Socket of the alveolar part of the mandible, between the first premolar and the first molar.

Structure

Larger than the first and with two or three cusps (the lingual one may split in two). A single root, almost always with one canal. It erupts at about 11 to 12 years.

Neighborhood

The apex lies near the mental foramen, situated just below the second premolars.

Blood supply

Inferior alveolar artery, branch of the maxillary, which runs in the mandibular canal and gives a branch to each root; the veins accompany the artery.

Innervation

Inferior dental plexus, formed by the inferior alveolar nerve (CN V3), which runs in the mandibular canal.

Lymphatics

The lymphatic vessels of the tooth and gum drain mainly into the submandibular lymph nodes.

Clinical

It is one of the teeth most often missing from agenesis. In surgery and anesthesia of the inferior alveolar nerve, the mental foramen is the point of attention at this level.

Source: cap. 8, «Dientes»; tabla 8-13 B (erupción de los dientes permanentes)

Other structures in this region

• Maxillary central incisor
• Maxillary lateral incisor
• Maxillary canine
• Maxillary first premolar
• Maxillary second premolar
• Maxillary first molar
• Maxillary second molar
• Maxillary third molar