Dental quotes for jaw pain and grinding use several names for things that look alike in the hand. The useful question is not what it is called but what job it does, and whether that job matches your problem.
NIDCR, part of the US National Institutes of Health, says intraoral appliances fit over the teeth, protect them and may help with habits such as clenching, and that they do not change the teeth or bite. It lists the names you will meet on paperwork: nightguards, splints, stabilization appliances and occlusal splints. Because evidence for many TMD treatments is limited, NIDCR says experts recommend conservative care and avoiding treatments that permanently change the joints, teeth or bite.
| Family | What it does | Typically used for |
|---|---|---|
| Stabilization splint | Hard, full-arch, gives an even biting surface so no single tooth contact steers the jaw | Muscle pain, sleep grinding with tooth wear, or both |
| Anterior repositioning splint | Holds the lower jaw slightly forward | Selected disc-displacement cases with clicking or locking |
| Soft guard | Cushions the teeth | Short-term protection; softer materials wear faster |
| Special-purpose appliance | Built for another target, such as sleep-related breathing | Referred cases |
The guide to TMJ splint types adds a key point: a stabilization splint made and monitored properly is reversible and does not move teeth, which is why it is the usual first choice.
MedlinePlus describes bruxism as grinding the teeth by sliding them back and forth, by day or at night, and notes that sleep grinding is often a bigger problem because it is harder to control. It can wear teeth down and strain the jaw muscles and joint. A guard spreads the force and protects teeth and restorations. It does not switch off the muscle activity, a distinction the bruxism treatment overview stresses: protecting teeth, reducing pain and improving sleep are three different targets that need different tools.
A custom guard is made from an impression or an intraoral scan and adjusted so the bite contacts are even. Hard acrylic lasts and cleans easily; soft or dual-laminate guards feel better at first but wear faster. The custom night guard walkthrough covers the fitting and review visits.