Temporomandibular Joint (TMJ)

The chewing system is made up of four distinct parts: the TMJs (the jaw joint), muscles that move the lower jaw, back teeth, and front teeth. All parts must work in harmony to avoid any break down of the chewing system. A healthy chewing system is free of signs and symptoms of breakdown in the TMJs, teeth, and their supporting structure: the gum and bone, with peaceful musculature.

Signs and symptoms of breakdown include:

• Pain and tenderness of the TMJs
• Clicking or popping of the TMJs
• Tender or sore muscles
• Headaches
• Worn teeth
• Loose teeth
• Fractured teeth
• Aggravation of periodontal disease

For the chewing system to work properly there are two basic principles that need to be in place:

1. The TMJs need to be able to seat properly and all teeth should hit evenly. As the lower jaw moves, the front teeth should immediately engage and slide across each other.
2. As this happens, the back teeth should immediately separate so they can not grind on each other.

These principles keep the muscles from becoming hyperactive and result in a chewing system that is functioning properly with less stress placed on it.

The end result is a healthier, less stressed chewing system where teeth are not wearing down or being fractured. Thus, fillings and restorations last longer and the jaw and its muscles are comfortable.