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Mandibular Overdentures Retained by Four Locator Attachments Versus Four-Implant Bar Attachments
Sponsor: Menoufia University
Summary
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.
Official title: Residual Ridge Changes in Mandibular Overdentures Retained by Four Locator Attachments Versus Four-Implant Bar Attachments: A 10-Year Retrospective Study
Key Details
Gender
All
Age Range
40 Years - 70 Years
Study Type
OBSERVATIONAL
Enrollment
22
Start Date
2024-01-01
Completion Date
2025-10-01
Last Updated
2025-07-30
Healthy Volunteers
Not specified
Conditions
Interventions
Four Locator Attachments, Four Bar Attachment System
This study retrospectively evaluated two types of implant-retained mandibular overdenture attachment systems placed in edentulous patients over a 10-year period. All patients received four dental implants placed in the interforaminal region (lateral incisor and first premolar areas). In the Locator group, each implant was restored with an individual Locator attachment, allowing for independent retention and easier hygiene access. In the Bar group, the four implants were splinted together with a rigid metal bar, and the overdenture was attached using clips that engaged the bar, offering splinted support and enhanced load distribution. Both interventions were designed to support mandibular overdentures and were compared in terms of their long-term effects on posterior mandibular ridge resorption, marginal bone loss around implants, and anterior maxillary ridge resorption.
Locations (1)
Faculty of Dentistry
Al Mansurah, Menoufia, Egypt