Hard palate

The hard palate forms the anterior two-thirds of the palate and separates the oral cavity from the nasal cavity. It provides a rigid surface important for mastication, speech, and swallowing.

Structure

The hard palate is formed by:

• Palatine processes of the maxillae (anterior three-quarters)

• Horizontal plates of the palatine bones (posterior one-quarter)

These bones meet at the:

• Median palatine suture in the midline

• Transverse palatine suture between maxilla and palatine bones

Mucosal Features

The hard palate is covered by tightly adherent mucoperiosteum and contains:

• Palatine raphe, which is a midline mucosal ridge

• Transverse palatine folds (rugae), which are irregular ridges aiding food manipulation

• Incisive papilla, which is a mucosal elevation over the incisive fossa behind the maxillary incisors

Openings

• Incisive foramen: Transmits the nasopalatine nerve and branches of the greater palatine vessels.

• Greater palatine foramen: Located posterolaterally near the third molar; transmits the greater palatine nerve and vessels.

• Lesser palatine foramina: Transmit lesser palatine nerves and vessels to the soft palate.

Blood Supply

Mainly from branches of the maxillary artery:

• Greater palatine artery

• Sphenopalatine artery

• Ascending palatine branch of facial artery

Innervation

Sensory innervation is from branches of the maxillary nerve (CN V2):

• Nasopalatine nerve: anterior hard palate

• Greater palatine nerve: posterior hard palate