Metal vs plastic: which guide places cheekbone implants more accurately?
NCT ID NCT07551024
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at people who have lost a lot of bone in their upper jaw and need special cheekbone (zygomatic) implants to support false teeth. Researchers want to see if using a metal surgical guide is more accurate than a plastic one when placing these implants. Each participant will get implants on both sides of their jaw—one side with a metal guide and the other with a plastic guide—so the accuracy can be compared directly.
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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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About 4 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Nov 2025
- Expected to finish
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Jun 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 years and older
- 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 ≥18 years with severely atrophic maxilla. * Acquired maxillary defects resulting from trauma, pathology, or previous surgical resection. * Indicated for zygomatic implant-supported fixed prosthesis. * Sufficient mouth opening for zygomatic implants placement. * Patients willing to sign informed consent and attend follow-ups. Exclusion Criteria: * Uncontrolled systemic disease affecting healing (e.g., uncontrolled diabetes, etc). * Heavy smokers * Previous radiotherapy or bisphosphonate therapy. * Active sinus or nasal infection. * Severe parafunctional habits (e.g., bruxism). * Pregnant or lactating women. * Patients with psychiatric disorders affecting compliance.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Future University in Egypt
RECRUITINGNew Cairo, Cairo Governorate, 11835, Egypt
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Other studies related to the condition(s) this trial covers.
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