Patient based and clinical outcomes of implant telescopic attachment- retained mandibular overdentures: A 1-year longitudinal prospective study

Objective masticatory performance with the CCD and ISOD was recorded using mixing ability test. Evaluations were carried out at three different times for the CCD-ISOD patient cohort (n=17), as follows: 3 months with the new CCDs, 3 months after mandibular ISOD provision, and, at 1 year post-issue of the ISOD. Peri-implant parameters (Plaque Index, Bleeding on Probing, Periimplant Probing Depth, Gingival Recession, Width of Attached Gingiva and Implant Stability) were additionally assessed at specific intervals (at the time of abutment connection for ISOD; 6 months post issue of ISOD; 1 year post-issue ISOD) during the treatment period. The data obtained were was statistically analysed and compared using Wilcoxon signed rank test, Repeated Measure ANOVA and paired-t tests at a significance level of ÃŽ±=0.05.Objective: The purpose of this study was to evaluate the Oral health Related Quality of Life (OHRQoL), denture satisfaction and masticatory performance in edentulous patients provided with mandibular implant supported overdentures (ISODs), retained with telescopic attachments and compare them with the conventional complete dentures (CCDs). The peri-implant soft tissue changes were also evaluated at various intervals during the 1 year observation period. Materials and Method: Of the 27 selected patients who agreed to participate and received new CCDs, 17 patients further received two mandibular inter-foraminal implants and had their mandibular CCDs converted into ISODs, with telescopic attachments. Questionnaires were used to assess the OHRQoL (S-OHIP 14 [M], Shortened Oral Health Impact Profile 14 Malaysian version) and denture satisfaction at different stages of the treatment with the CCDs and the ISODs.Results: In the 17 patients who completed the protocol, significant improvements were observed in the total OHIP scores and patients’ rating of satisfaction when CCDs were modified to ISODs, after 3 months and at 1 year follow-up. Significant differences were also noted in the mixing ability indices (MAI) at both intervals post-conversion of CCD to ISOD, with the highest values observed at 1 year follow up. Statistically insignificant differences were observed for all the periimplant parameters, except for gingival recession, where significant changes were observed 3 months post-delivery of ISOD, with stabilization of values occurring at 1 year with the implant overdentures. Conclusions: Telescopic crown attachment- retained mandibular ISODs improved the OHRQoL, dental prosthesis satisfaction and masticatory performance compared to the CCDs. Perimplant soft tissue response and implant stabilty were found to be favourable at 1 year follow-up.