Do I need to wear the splint all day?

No, it's usually worn only while you sleep. Because teeth grinding and clenching mainly occur during sleep, night-time wear alone can reduce the load on the joint and muscles. In severe cases, we may recommend wearing it for part of the daytime as well early in treatment, and wear time is adjusted according to your improvement. However, if your pain is worse in the morning after wearing the appliance, or your bite (the way your teeth meet) feels different, the appliance needs adjusting — please stop wearing it and come in.