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New dental crown study aims to stop implants from coming loose

NCT ID NCT07456995

Disease control Sponsor: October University for Modern Sciences and Arts Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested different surface treatments on the metal base of dental implants to see which helps keep a zirconia crown attached best. Twenty-seven adults missing a lower molar received a crown, and the metal base was either left untreated, coated with silica, or coated with silica plus a primer. Over one year, researchers checked for crown breakage or loosening and gum health around the implant.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Tribochemical silica coating and Z-Prime Plus primer
What this could lead to
If successful, this could identify a simple surface treatment that makes dental crowns less likely to loosen or break.
What could go wrong
This is a small, early-stage study with only 27 participants, so results may not apply to everyone. The follow-up is only one year, so long-term benefits are unknown.

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

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

27 people

The number who actually took part.

Started

Jan 2025

Finished

Feb 2026

Lead sponsor

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

18 to 55 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18 - 55 years * Missing mandibular first molar with opposing natural teeth * Good oral hygiene and general health (ASA I or II) * Smoking ≤ 10 cigarettes/day Exclusion Criteria: * Poor oral hygiene * Severe wear facets, clenching, or bruxism * Heavy smokers (\>10 cigarettes/day)

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Conditions

The condition(s) this trial relates to.

Jaw, Edentulous, Partially Tooth Loss

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Dental implant Jaw, edentulous, partially Molar teeth Tooth loss

Contacts and locations

Locations

  • MSA University, Faculty of Dentistry

    Giza, Giza Governorate, 14512, Egypt

More trials for these conditions

Other studies related to the condition(s) this trial covers.