Mandibular Implant Overdenture With OT Cap Bar vs Bar Attachment

Starting soon · Not applicable

Conditions studied: Edentulous Mandible, Implant-Supported Overdentures

In brief

This clinical study is being conducted at Cairo University to evaluate two different types of attachments used with implant-supported dentures in the mandible. Patients who have lost all their teeth in the lower jaw receive implants to help hold their dentures in place. This study compares two types of attachments for connecting the denture to the implants: 1. Bar attachment only, which is a traditional method. 2. Bar with OT Cap attachment, which is a newer design that includes a small sphere (cap) to help with retention and comfort. The purpose of this study is to find out which attachment type works better in terms of: 1. How well the denture stays in place (retention) 2. How much bone is lost around the implants over time (crestal bone loss) 3. How much the attachment parts wear out (cap wear) 4. How satisfied the patients are with their dentures The study is a randomized controlled trial. This means participants will be randomly assigned to one of the two groups (bar-only or bar with OT Cap). All participants will receive complete dentures and three dental implants in the lower jaw. Follow-up will include measurements of denture retention and cap wear at the time the denture is inserted and again after 6 months. Bone loss will be checked with digital X-rays, and patient satisfaction will be assessed using a short questionnaire. The study will include 22 participants (11 in each group), aged 30 to 65, who are healthy and have enough bone in the jaw to support implants. This study is designed to help dentists and patients make better decisions about which type of implant attachment provides better long-term results and patient comfort.

Key facts

Study ID: NCT07067190
Run by: Maisa Mohamed Farid Shaaban
People needed: 22
Starts: 2026-09-01
Expected to finish: 2027-03-01
Last updated by the study team: 2026-03-18

Who can join

Age: 30 and older, up to 65. Sex: any. Healthy volunteers: accepted.

You may qualify if…

Completely edentulous healthy patients
Age between 30 and 65 years
Adequate bone volume in the anterior and premolar-molar region (minimum 11 mm)
Adequate inter-arch space (12-14 mm)

You may not qualify if…

Severe maxillomandibular skeletal discrepancy
Parafunctional habits (e.g., clenching, bruxism)
Temporomandibular joint disorders
Heavy smokers (≥20 cigarettes/day)
History of head and neck radiation
History of chemotherapy
Systemic conditions that may interfere with healing or bone quality (e.g., uncontrolled diabetes, osteoporosis, bisphosphonate therapy)
Drug abuse or alcohol dependence

Where it is running

Faculty of Oral and Dental Medicine, Cairo University — Cairo, Cairo Governorate, Egypt

Full record on ClinicalTrials.gov

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