Denture anchors compared: are Glue-On attachments better than clasps?
NCT ID NCT07160660
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how satisfied people are with two types of removable partial dentures: those held in place by adhesive attachments (glued to healthy teeth) and those using traditional metal clasps. Researchers will also check how well each option works over time. About 250 patients who received these dentures between 2001 and 2025 at the University of Basel will fill out a satisfaction survey and have a routine dental exam. This is an observational study, meaning no new treatments or procedures are being tested.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 250 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Dec 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.
Who is studied
This is a retrospective study including all available patients who received an extracoronal adhesive attachment at the University Center for Dental Medicine Basel (UZB) between 2001 and 2025 and a comparable group (same observation group, age and distribution of abutment teeth) with a comparable sample size who received a clasp-retained RPD. Eligible cases will be identified using the relevant billing code entered into the internal billing system
- 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.
Show the full entry requirements Hide 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: * Signed informed consent. * Patients with at least one extracoronal adhesive attachment for anchoring an RPD and patients with clasp-retained RPD during a 25-year period (2001 - 2025) at the Department for Reconstructive Dentistry or the affiliated student course. * The attachment or clasp must have been in place for a minimum of six months at the time of clinical follow-up. * Sufficient availability of medical/dental records * Age ≥18 years at time of initial treatment. * Ability to attend a clinical follow-up appointment. Exclusion Criteria: * Patients unable to provide informed consent. * Incomplete or missing documentation of the prosthetic treatment. * Attachments or clasps inserted less than six months ago. * Inability to attend the follow-up appointment or language barriers preventing study understanding.
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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
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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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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Universitäres Zentrum für Zahnmedizin Basel - Klinik für Rekonstruktive Zahnmedizin
Basel, Basel, 4058, Switzerland