Evaluation of retentive force between stud and resilient telescopic crown attachment for implant-retained mandibular overdentures

Abstract

Purpose This study aimed to evaluate the retentive force between stud and resilient telescopic crown attachments for implant-retained mandibular overdenture. Patients and methods A total of 20 male patients were selected from the Clinic of Removable Prosthodontics Department. Faculty of Dentistry, Sinai University (Kantara). Patients were divided into two equal groups. Group I (control group): patients were treated with two implants of 3.7 mm diameter and 13 mm length (in the canine regions), retaining mandibular overdentures with ball abutments, and by conventional maxillary complete dentures. Group II: patients were treated with two implants of 3.7 mm diameter and 13 mm length (in the canine regions), retaining mandibular overdentures with conical abutments with a 6° taper, and by conventional maxillary complete dentures. Retention force was recorded at the time of insertion (T0), 6 months (T6), and 12 months (T12) later. Results One-way anova revealed significant differences between the two groups in initial retention forces (T0). However, no significant difference was observed between the two groups at T6 and T12. Group II (telescopic attachment) was associated with significantly higher retention losses than Group I (ball attachment). In comparing the mean retention loss values for the two groups at different follow-up periods, significant differences were observed for both groups. Conclusion Within the limitations of this study, it can be concluded that: telescopic attachment with taper 6° can provide acceptable retention compared to ball and socket attachment during 12 months of overdenture use.