Comparison Between OT-Equator Versus Ball and Socket Attachment Systems in Implant-Retained Mandibular Complete Overdentures

This study compares two different attachment systems, OT Equator and Ball and Socket, used to retain mandibular complete overdentures supported by a single dental implant. The study aims to evaluate and compare the retention of the two attachment systems over a 12-month follow-up period. The study will help determine whether one attachment system provides better and more stable retention of the overdenture over time.

Inclusion Criteria: * Completely edentulous patients * Non smokers * Patients free from intra oral diseases that may affect implant overdenture prognosis * Patients free from systemic conditions that may influence bone resorption or implant success * Able and willing to comply with study visits and follow up schedule Exclusion Criteria: * Smokers or tobacco users * Presence of active oral lesions, infections, or mucosal pathology * Systemic diseases affecting bone metabolism (e.g., uncontrolled diabetes, osteoporosis requiring bisphosphonates) * History of head and neck radiation * Severe parafunctional habits (e.g., bruxism) * Inability to attend follow up appointments or provide informed consent