| Field | Value |
|---|---|
| ID | OA-0323 |
| Type | bruxism_TMD |
| Category | bruxism_TMD |
| Fixed/removable | removable |
| Primary function | muscle deprogramming; centric relation recording; TMD diagnosis |
| Malocclusion target | TMD; occlusal dysfunction; pre-restorative diagnosis |
| Inventor | Lucia (Lucia jig, 1960s); Kois (Kois deprogrammer) |
| First year | 1960s |
| Period | modern |
| Status | current |
| Wear duration | short-term (hours to days) |
| Uses TADs | no |
A deprogrammer is a small anterior-only occlusal device that contacts only the lower anterior teeth (incisors/canines), disengaging all posterior teeth from occlusion. This bilateral disocclusion of the posterior teeth causes the elevator muscles (masseter, temporalis, medial pterygoid) to relax — eliminating the muscle engrams (learned bite patterns) that keep the mandible in a habitual (possibly strained) position. After muscle relaxation, the mandibular condyles can seat fully in the glenoid fossa in their physiologic centric relation position. The deprogrammer is used short-term (worn for a few hours to a few days) to relax the muscles before taking a centric relation bite record for restorative treatment planning, full-mouth reconstruction, or TMD appliance fabrication.
Anterior-only contact disengages the posterior teeth. With only the incisors/canines touching the anterior platform, the posterior elevator muscles receive minimal stimulation and progressively relax from their habitual contraction pattern. After 5–20 minutes of wear (or up to several days for chronic muscle tension), the condyles can be guided into centric relation. The deprogrammer does not reposition the mandible — it simply removes the occlusal interferences and muscle tension that prevent the natural centric relation position from being recorded. A centric relation bite record taken after deprogramming is significantly more reproducible than one taken without.
Pre-restorative diagnosis before full-mouth reconstruction, implants, veneers, or crown-and-bridge cases; TMD diagnosis — establishing centric relation to compare with maximum intercuspation (if these differ, the patient has a centric slide that may contribute to symptoms); patients with significant occlusal wear requiring reconstruction at a new vertical dimension; orthodontic treatment planning to verify that the planned occlusal outcome aligns with centric relation; neuromuscular dentistry protocols; pre-splint fabrication to ensure the splint is made at a correct physiologic jaw position.
Short-term only — not a therapeutic device for long-term wear (only disengages posterior teeth). Should not be used as a night guard (insufficient protection for bruxism). Patients may initially feel uncomfortable with the change in bite. Requires clinician training in centric relation recording technique to utilize effectively.
surface of upper anterior teeth
only
mandibular condyle's closure arc
bow
The deprogrammer platform must be precisely flat — any incline creates a directional guide that defeats the purpose of freeing the mandible. Thermoplastic resin fabrication is fastest (chairside); lab-fabricated acrylic versions provide a more durable and precisely fitted platform. The Gelb variant suggests a more complex design — possibly combined with posterior elements for a different therapeutic position. NORD is a neuromuscular orthotic variant with broader coverage.
anterior platform.
coverage.
bruxism/migraine prevention.
repositioning appliance for longer-term use.
Shop](https://royaldentshop.com/products/lucia-jig-anterior-deprogrammer)
Education](https://www.speareducation.com/spear-review/2015/09/muscle-deprogramming-a-source-of-confusion)
IJPREMS 2025](https://www.ijprems.com/uploadedfiles/paper/issue3march2025/38995/final/finijprems1742024324.pdf)
relation recording, fabrication, business notes.