A-contacts

The A-contact refers to contacts of the buccal cusps of the upper and lower jaw. The cusps of the upper jaw tooth touch the cusp of the lower jaw tooth. The A-contact belongs to the so-called ABC-contacts. This refers to the location of antagonist contacts that ensure stable occlusion in the posterior tooth region. The antagonist is the opponent or the tooth in the opposite jawbone.

The cusps engage in the corresponding dimples of the opposite cheek teeth during chewing or chewing. This chewing process is responsible for grinding up the food in the chewing system. In order to avoid interfering contacts in the dentition, the teeth must be in contact with each other in a coordinated manner and only touch each other at the ABC contact points.