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Clinical Performance of Implant Supported Mandibular Overdentures With Cantilever Bar and Stud Attachments: A Retrospective Study Publisher Pubmed



Nejatidanesh F1 ; Bonakdarchian H2 ; Savabi G1 ; Bonakdarchian M3 ; Atash R4 ; Savabi O5
Authors
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Authors Affiliations
  1. 1. Dental Materials Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Stomatology and Dentistry, Erasmus Hospital, Universite Libre de Bruxelles, Brussels, Belgium
  5. 5. Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Clinical Implant Dentistry and Related Research Published:2022


Abstract

Background: Treatment of edentulous patients with implant-supported over-dentures improves denture's retention and stability. Published data concerning implant-supported overdenture with cantilever bars that claimed that can affect the survival and bone loss of implants are scarce. Purpose: The purpose of this study was to evaluate 5-year clinical performance of mandibular implant-supported over-dentures with different attachment systems. Materials and methods: In this retrospective study, 103 patients who had received mandibular over-dentures supported by two implants were evaluated in a 5-year follow up. Studied groups were patients with Spherblock ball attachment (58 patients), Dolder bar with cantilever (36 patients), and Locator attachment (9 patients). Marginal bone-loss around implants, prosthetic complications, soft tissue status of the implants (gingival index, plaque index, pocket depth, and bleeding on probing) were used to compare studied groups. Visual Analogue Scale (VAS) criteria was used to assay patient's satisfaction. One-way ANOVA, Scheffe, Kruskal–Wallis, Mann–Whitney, and Fisher's exact tests, were used for the data analysis (α = 0.05). Results: One hundred and three patients (46 male, 57 female, mean age 64.7 ± 8.6) with 206 implants (Strauman) were studied. The implant survival rate was 100% with mean bone loss of 0.22 mm around implants in 5 years. Prosthetic complications including attachment wear and denture fracture occurred more often with ball attachments. The number of attachment replacement, and post insertion appointments were significantly less in patients with bar attachments (p < 0.05). Pocket depth and gingival index were less in the ball attachment (p < 0.05). Conclusion: Mandibular overdenture supported by two implants can be considered a successful treatment in edentulous patients. The frequency of prosthetic complication is higher in unsplinted than splinted superstructures. © 2022 Wiley Periodicals LLC.
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