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 type | Interventional |
|---|---|
| Ages | 55 Years to 70 Years |
| Sex | All |
| Enrollment | 28 (estimated) |
| Sponsor | Ain Shams University Academic / other |
| Locations | 2 sites (Cairo and 1 other locations) |
| Status | Recruiting |
| Started | November 29, 2025 |
| Main results expected | March 31, 2026 |
| Study ends | April 15, 2026 |
| Registry record updated | December 30, 2025 |
| Trial ID | NCT07256106 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
- Principal investigator: Ahmed Mohamed, MD — Faculty of dentistry, ain shams university
- Study coordinator: ahmed mohamed, MD
- Email: ahmedmostafa@dent.asu.edu.eg
- Phone: 01111191337
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.