TMD Symptoms After a New Three-Unit Bridge
A 41-year-old man reports right-sided facial pain and headache for 6 months. He has limited opening of 32 mm, a right TMJ click, and tenderness of the right masseter and temporalis. He recently received a three-unit fixed partial denture from 44 to 46; the patient believes the new bridge “changed his bite.” Examination shows a heavy centric contact on 46, a 1-mm slide from retruded contact to maximum intercuspation, and no dental caries. MRI shows anterior disc displacement with reduction on the right, no degenerative joint disease. He asks you to “grind the bridge until the pain disappears.” He has no history of trauma, no systemic arthritis, and takes no medications. He clenches during work and drinks 3 cups of coffee daily.
1. What is your diagnosis and first-line management? Explain why irreversible occlusal adjustment is not the first step.
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The working diagnosis is masticatory myalgia with right temporomandibular disc displacement with reduction, with limited opening and a click but no degenerative joint disease. The heavy contact on 46 may be a contributing factor, but it is not proven to be the sole cause; his clenching and caffeine intake are also relevant.
First-line management should be reversible:
- explain the diagnosis and reassure him that this is not a joint destruction process;
- soft diet, jaw rest, and avoidance of wide opening;
- NSAIDs for a short period if medically appropriate;
- a stabilization splint for nocturnal clenching;
- physical therapy or home exercises;
- reduce caffeine and identify clenching triggers.
I would not grind the bridge first because pain can be muscular and may resolve without occlusal change; irreversible adjustment before the muscles settle can remove stable contacts and create a new problem. The 1-mm slide alone is not enough to justify grinding a new fixed prosthesis.
2. How would you evaluate the FPD 44–46 as a contributing factor, and when would you adjust it?
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I would evaluate the FPD systematically: marginal fit, proximal contacts, occlusal contacts in maximum intercuspation, and excursive movements. The reported heavy centric contact on 46 should be verified with articulating paper and, if possible, a mounted cast or intraoral scan. A 1-mm slide from retruded contact to maximum intercuspation is common and not automatically pathologic.
I would defer adjustment until the acute muscle symptoms have been treated with a splint and conservative care. If the heavy contact persists after symptoms improve, and if it is clearly creating a nonworking interference or a premature contact, I would adjust it carefully in maximum intercuspation and excursion. If the occlusion is unstable or the FPD is maladapted, remake may be preferable to repeated grinding. The patient should understand that occlusal adjustment is a refinement, not a cure for TMD.
3. Outline a 3-month follow-up plan and criteria for referral to an oral medicine/TMJ specialist.
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At follow-up I would record pain intensity, maximum opening, joint sounds, palpation tenderness, and function. I would review splint compliance, caffeine intake, and clenching awareness. If he is improving, I would continue conservative care and gradually reduce splint use. If the occlusion remains suspicious after symptoms settle, I would reassess the FPD at that point.
Referral is indicated if:
- pain or limited opening worsens despite 4–6 weeks of conservative care;
- there is persistent locking, closed lock, or a new malocclusion;
- neurologic symptoms, swelling, or systemic disease is suspected;
- imaging suggests degenerative change or another joint pathology.
I would avoid irreversible occlusal therapy, surgery, or extensive imaging without clear indications. The patient should be told that the click may persist even when pain resolves, and that the goal is function and comfort rather than a silent joint.