| | Dental Health | Toothache
Wisdom Teeth Extraction and Jaw Dislocation: Myth vs. Reality
Routine third molar extraction does not involve jaw dislocation. The temporomandibular joint (TMJ) remains intact throughout the procedure.
What Actually Happens
- Mouth opening: Achieved with a mouth prop (bite block) or retractor — typically 30–45 mm interincisal opening.
- Access: For mandibular molars, a buccal mucoperiosteal flap is reflected; bone removal (if needed) is with a surgical handpiece.
- Tooth sectioning: Often divided (crown/roots) to minimize bone removal and force.
- Elevation/Extraction: Controlled forces with elevators/forceps — not joint dislocation.
When TMJ Stress Occurs
- Prolonged wide opening: Surgeries >60–90 min can cause post-op TMJ soreness, transient trismus, or exacerbate pre-existing TMD.
- Aggressive retraction: Excessive force on the coronoid process/ramus may strain the lateral pterygoid or capsule.
- Pre-existing TMD: Patients with clicking, locking, or myofascial pain are more prone to post-op flare.
Rare Scenarios Requiring Extra Access
| Scenario | Technique | TMJ Impact |
|---|---|---|
| Deeply impacted, high ramus | Coronoidectomy (rare); extended flap; piezoelectric surgery | Temporary soreness; no dislocation |
| Ankylosed tooth / dense bone | Extended osteotomy; tooth division | More force → more post-op trismus |
| General anesthesia with nasal intubation | Throat pack; mouth prop | Controlled opening; no dislocation |