Triangular Fossa

The triangular fossa is a triangular area on the anterior surface of the maxilla.

It is separated into three equal sections:

• The middle 1/3 is Zone 3.
• The anterior 1/3 is divided into 3 equal parts.
• The posterior 1/3 has 2 equal sections.

Here are some questions and answers about the triangular fossa:

• What is the triangular fossa? The triangular fossa is a triangular area on the anterior surface of the maxilla.
• How is the triangular fossa divided? The triangular fossa is divided into three equal sections: the middle 1/3 is Zone 3, the anterior 1/3 is divided into 3 equal parts, and the posterior 1/3 has 2 equal sections.
• What is Zone 3? Zone 3 is the middle 1/3 of the triangular fossa. It is a region of high vascularity and is often used for dental implants.
• What are the contents of the triangular fossa? The contents of the triangular fossa include the infraorbital nerve, infraorbital artery, and infraorbital vein.