Background: Semi-precision attachments require repeated replacements and servicing in use, so it is important to understand the time frame of this wear and its possible replacement for better patient compliance. This study was aimed to assess the retention strength and fatigue resistance of Rhein OT caps and Ceka sagix attachment in the patients.

Materials and Methods: Those patients who had tooth supported overdentures incorporating Sagix and Rhein attachments were shortlisted and classified based on the time frame of denture insertion into 0, 1, 2, 3, and 4 years. An indigenous retention tester equipment (KS Enterprises, Bengaluru, India) was fabricated and calibrated to measure the force required to displace the overdenture giving the value of its retention which was further compared with the value of retention strength of newly inserted overdentures using both Sagix and Ceka attachment systems individually. Results: The values were noted and subjected to statistical analysis for evaluating the retention loss and development of fatigue. Repeated measures of ANOVA were used which provided a statistically significant relation between the retention values of both the attachment systems on tooth supported overdentures when compared with the time period of its use in the oral cavity.

Conclusion: Sagix and Rhein attachment systems showed adequate retention values up to the period of 2-3-year with a subsequent reduction in the retention values but no component fracture of the attachment systems.