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Denture clasp wear: do zirconia abutments outlast natural teeth?

NCT ID NCT07708558

Knowledge-focused Sponsor: Mansoura 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 16, 2026 · Last updated Jul 17, 2026 · Updated 1 time

Summary

This study looks at how much the plastic clasps on a type of partial denture wear down when they rub against either natural teeth or zirconia caps. Ten adults with missing back teeth on both sides of the lower jaw will be split into two groups. Researchers will use special microscopes to check the clasp surfaces when the dentures are first placed, then again after 6 and 12 months. The goal is to see which type of tooth support causes less wear, helping dentists make better choices for long-lasting dentures.

What this could mean

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

Active substance
PEEK removable partial denture framework with either natural tooth abutments or zirconia full-coverage abutments
What this could lead to
If successful, this study could help dentists choose better materials for partial dentures, potentially reducing wear and improving denture longevity.
What could go wrong
This is a small, early-stage study with only 10 participants, so results may not apply broadly. The findings are observational and do not test a treatment.

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

10 people

The number who actually took part.

Started

Mar 2024

Finished

Mar 2025

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 50 years

Sex

Anyone

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: Adults aged 40-50 years. Mandibular Kennedy Class I partial edentulism. Bilateral distal extension edentulous areas. Presence of healthy canines and first premolars suitable as abutment teeth. Adequate oral hygiene and healthy periodontal condition. Adequate interarch space for removable partial denture fabrication. Ability and willingness to attend all scheduled follow-up visits and provide written informed consent. Exclusion Criteria: Systemic diseases or medications that could affect bone or soft tissue healing. Active periodontal disease or poor oral hygiene. Severe parafunctional habits (e.g., bruxism or clenching). Smoking. Pregnancy or lactation. Allergy or hypersensitivity to any study materials. Inability to comply with study procedures or follow-up visits.

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As listed by the trial registrant

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

Partial edentulism Partial edentulism class 1

Contacts and locations

Locations

  • Faculty of dentistry Mansoura university

    Al Mansurah, Egypt

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