Why would you use a hard night guard?

Why would you use a hard night guard?

• A. Increase loading by 85%
• B. No effect on loading
• C. Decrease loading by 85%
• D. Decrease jaw opening

Answer: (C)

A hard night guard works by protecting the teeth and TMJ during parafunctional activity (like grinding and clenching) by providing a rigid, stable surface that distributes bite forces over a larger area. Instead of two teeth crashing directly together with high peak forces, the guard creates a barrier and a well-distributed contact, which significantly reduces the impulse transmitted to the joints and supporting structures. This redistribution and cushioning can dramatically cut the stress on the TMJ—often described as a substantial reduction in loading, around 85% in some clinical contexts. This reduction in joint loading helps lessen wear on the teeth and can ease muscle strain and jaw pain associated with bruxism. The goal isn’t primarily to reduce how wide you can open your mouth; rather, the guard sits on the teeth, establishes a stable occlusal relationship, and minimizes harmful movements during sleep.

A hard night guard works by protecting the teeth and TMJ during parafunctional activity (like grinding and clenching) by providing a rigid, stable surface that distributes bite forces over a larger area. Instead of two teeth crashing directly together with high peak forces, the guard creates a barrier and a well-distributed contact, which significantly reduces the impulse transmitted to the joints and supporting structures. This redistribution and cushioning can dramatically cut the stress on the TMJ—often described as a substantial reduction in loading, around 85% in some clinical contexts.

This reduction in joint loading helps lessen wear on the teeth and can ease muscle strain and jaw pain associated with bruxism. The goal isn’t primarily to reduce how wide you can open your mouth; rather, the guard sits on the teeth, establishes a stable occlusal relationship, and minimizes harmful movements during sleep.