Evaluation of Retention force of Two Different Attachments for Mandibular Implant Supported Overdenture (A Comparative Study)

Abstract Objectives: In an in vitro study, comparing the maximum retentive force of ball and socket attachments with locator attachments for mandibular implant-supported overdentures. Background: Dental implants have revolutionized the field of prosthodontics by offering a reliable and stable solution for patients with missing teeth. Among the various types of implant-supported overdentures, mandibular implant-supported overdentures are commonly used to improve function and esthetics for individuals with total edentulism in the mandible. Retention force is a crucial factor in the success of mandibular implant-supported overdentures, as it directly impacts the stability and comfort of the prosthesis. Materials and Methods: A comparative study was conducted on two groups of patients who received mandibular implant-supported overdentures with different attachment systems. Group A: received overdentures with Ball and socket attachment system, while Group B: received overdentures with Locator implant attachment system. The retention force of each attachment system was measured using a standardized testing protocol. The measurements were taken at different time points to assess the initial and long-term retention force of the attachments. A gradual increase in tension was observed, and the maximum force required to retain was calculated. The evaluation of retention will occur at baseline (T0) and after 3 months (T1), 6 months (T2), 9 months (T3), and one year (T4) of usage. Results: The study revealed that Attachment System Ball /Ring exhibited significantly higher retention force compared to Locator implant Attachment System in the initial term assessments. This difference in retention force could be attributed to the design and material properties of the two attachment systems. Locator implant Attachment System demonstrated superior retention force at the end term of assessment. Conclusion: Both types of attachment systems; Ball/O Ring and Locator attachments are trustworthy modalities for advancement the retention and stability of implant retained mandibular over denture with superior initial stability results for the Locator attachment.