Custom plastic implant may offer better relief for chronic jaw dislocation
NCT ID NCT07698678
First seen Jul 13, 2026 · Last updated Jul 15, 2026 · Updated 2 times
Summary
This trial tests whether a custom-made plastic implant (ultra-high molecular weight polyethylene) works better than a standard titanium implant for people with chronic jaw dislocation. Participants have a jaw that repeatedly dislocates and has not improved with conservative treatments. The study measures changes in how wide the mouth can open, pain levels, and patient satisfaction after surgery.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- patient-specific ultra-high molecular weight polyethylene implant
- What this could lead to
- If successful, this could offer a more comfortable and effective surgical option for people with chronic jaw dislocation, potentially reducing pain and improving jaw movement.
- What could go wrong
- This is a small, early-stage trial with only 20 participants, so results may not apply to everyone. The new implant might not perform better than the standard titanium one, and surgery always carries risks like infection or implant failure.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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20 people
The number who actually took part.
- Started
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Jul 2024
- Expected to finish
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Sep 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 48 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * patients with recurrent dislocation with their maximum inter incisal opening over 55mm * longstanding dislocation of the TMJ involving both fixation for more than 3weeks and the failure of manual reduction * failure of conservative strategies such as orientation to self-limiting jaw movement and the use of chin-cap or bandage Exclusion Criteria: * patients with post-menopausal females with osteoporosis * Patient with uncontrolled systemic disease * pregnancy * psychological disorders, drug or alcohol dependency * Known allergies or sensitivities to dental materials, including Zirconia, Titanium or general anesthetic agents * Inability to return for follow up visits. * Refusal of participation from the patient
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Cairo University
Cairo, 0020, Egypt