Mandibular Overdentures Retained by Four Locator Attachments Versus Four-Implant Bar Attachments

This 10-year retrospective study investigates residual ridge changes in edentulous patients treated with mandibular overdentures (ODs) retained by either four Locator attachments or a four-implant bar system. Although two-implant ODs are well established, four-implant configurations may offer enhanced stability and function. Locator and bar attachments are commonly used, but their long-term effects on bone resorption patterns-especially posterior mandibular and anterior maxillary resorption-remain unclear. By standardizing implant positions, this study aims to directly compare the two systems to help guide clinicians in selecting the most effective attachment type for long-term success.

NCT Number	NCT07093853
Lead Sponsor	Menoufia University Collaborators: Mansoura University
Conditions	Bone Loss
Enrollment	22 participants
Start Date	2024-01-01
Primary Completion	2025-08-01 (estimated)
Study Completion	2025-10-01 (estimated)
Updated on ClinicalTrials.gov	2025-07-30