Clinical trial Recruiting at 2 sites Interventional Ages 55 to 70

Bite timing in lower overdentures supported by conventional versus mini dental implants

Official title: Evaluation of The Occlusion and Dis-Occlusion Time in Mandibular Single Overdentures Supported by Conventional Versus Mini- Dental Implants; A Parallel Blinded Randomized Clinical Trial

Run by Ain Shams University · NCT07256106 · Data updated 2026-11-12

This test will see if lower overdentures attached to two conventional implants or four mini-implants change bite contact and release times for people who have lost all lower teeth.

Quick facts

Study typeInterventional
Ages55 Years to 70 Years
SexAll
Enrollment28 (estimated)
SponsorAin Shams University
Academic / other
Locations2 sites (Cairo and 1 other locations)
StatusRecruiting
StartedNovember 29, 2025
Main results expectedMarch 31, 2026
Study endsApril 15, 2026
Registry record updatedDecember 30, 2025
Trial IDNCT07256106 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults with completely edentulous mandibular ridges, sufficient inter-arch space, a restored maxillary arch, good oral hygiene, and motivation for implant-retained overdentures.

Probably not a fit

Patients with uncontrolled systemic diseases affecting bone healing, current bisphosphonate treatment, pregnancy, inadequate bone volume, or poor oral hygiene are unlikely to benefit or may be excluded.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Twenty-eight patients with completely edentulous lower jaws will be recruited from the Prosthodontics Department at Ain-Shams University. Participants will be randomized with allocation concealment handled by a single postgraduate student to receive either an immediately loaded mandibular overdenture on two conventional implants or one on four immediately loaded mini-implants. The primary outcomes are occlusion and disocclusion times measured after prosthetic rehabilitation, with the Kapur index as a secondary outcome. Patients with conditions that may affect osseointegration (for example uncontrolled diabetes, pregnancy, or current bisphosphonate therapy) will be excluded.

Why it matters

Potential benefit: If successful, the results could help clinicians choose the implant approach that provides better bite contact timing and potentially improved comfort and function for lower overdenture wearers.

How similar studies have gone: Previous clinical reports have shown acceptable retention and outcomes for mini-implant–retained mandibular overdentures, but direct comparisons of occlusion and disocclusion time between conventional and mini-implant protocols are limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* patients with completely edentulous mandibular ridges and fully dentate or partially dentate maxillary arch restored with fixed restoration,

  * enough inter-arch space to allow for prosthetic rehabilitation with lower implant-retained overdentures
  * good oral hygiene and motivation.

Exclusion Criteria:

* The excluded patients will be patients with major systemic diseases that may affect osseointegration as uncontrolled diabetes mellitus, pregnancy, patients under bisphosphonate treatment.

Where it's running

  • Faculty of Dentistry Ain Shams University
    Cairo, Egypt
    Recruiting
  • Faculty of Dentistry Ain Shams University
    Cairo, Egypt
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.