Dental Anatomy: Tooth Surfaces

Teeth Surfaces

Introduction

The normal human mouth has approximately 28 to 32 teeth. Each tooth has five surfaces that are identified differently based on whether the tooth is posterior (molars and premolars) or anterior.

Posterior Teeth (Molars and Premolars)

Posterior teeth, which include molars and premolars, have the following surfaces:

• Occlusal: This is the biting surface of the tooth, which is the top surface used for chewing and grinding food.
• Buccal: The side of the tooth that faces the cheek is referred to as the buccal surface.
• Lingual: The surface that faces the tongue is known as the lingual surface.
• Mesial: The portion of the tooth that is oriented towards the front of the mouth.
• Distal: The part of the tooth that points towards the back of the mouth.

While teeth also have roots, the primary focus here is on the surfaces of the teeth.

Anterior Teeth

Anterior teeth share similar surfaces with posterior teeth, but with slight differences in terminology:

• Facial/Labial: In anterior teeth, the buccal surface is referred to as either facial or labial, indicating the side facing the lips or the front of the face.
• Incisal Edge: Instead of an occlusal surface, anterior teeth have an incisal edge, which is the biting surface on the incisal teeth. The incisal edge is used for tearing and cutting food, unlike the occlusal surface, which is used for chewing and grinding.

Function

The occlusal surfaces of posterior teeth are adapted for chewing and grinding food, while the incisal edges of anterior teeth are designed for tearing and cutting food.