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Screw count showdown: does one less screw save jawbone?

NCT ID NCT07360015

Knowledge-focused Sponsor: Ain Shams University 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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether using 3 screws instead of 4 to attach a full lower-jaw dental bridge affects bone loss around the implants. Fourteen men with no teeth in their lower jaw and no major health issues are being followed with X-rays over time. The goal is to see if fewer screws can still keep the bone healthy.

What this could mean

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

Active substance
OT Equator abutments with 3 or 4 screws
What this could lead to
If this trial succeeds, it could help dentists choose the best number of screws to minimize bone loss around dental implants.
What could go wrong
This is a very small study (14 men) and only measures bone changes on X-rays. It may not apply to women or people with health conditions.

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

14 people

The number who actually took part.

Started

Dec 2024

Expected to finish

Feb 2026

An estimate. End dates often move.

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

40 to 65 years

Sex

Male participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * completely edentulous patients * male patients * free from any systemic diseases * no history of recent administration of chemotherapy or radiotherapy * no history of para-functional habits Exclusion Criteria: * female patients * diabetic patients and patients with bone metabolism diseases * history of recent administration of chemotherapy or radiotherapy * history of para-functional habits * Heavy smokers. * Heavy consumption of Alcohol

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Conditions

The condition(s) this trial relates to.

osteonecrosis of the jaw

As listed by the trial registrant

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

Bone loss in jaw

Contacts and locations

Locations

  • Faculty of Oral and Dental Medicine - Egyptian Russian University

    Cairo, 11829, Egypt

More trials for these conditions

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