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Maxillary implant overdentures retained by use of bars or locator attachments: 1-year findings from a randomized controlled trial

Boven, G. C., Meijer, H. J. A., Vissink, A. & Raghoebar, G. M., Jan-2020, In : Journal of Prosthodontic Research. 64, 1, p. 26-33 8 p.

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  • Maxillary implant overdentures retained by use of bars or locator attachments 1-year findings from a randomized controlled trial

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Purpose: Comparison of outcomes of maxillary implant overdentures retained by use of either locator attachments or bars in a 1-year randomized controlled trial.

Methods: Fifty edentulous participants received four maxillary implants. They were allocated to two groups (n = 25) differing in type of prosthetic attachment used to retain the maxillary prosthesis: either locator attachments or bars were applied. After one year, implant and overdenture survival was assessed. Peri-implant hygiene (Plaque-index, presence of calculus), soft tissue conditions (Gingiva-index, Sulcus Bleeding-index and pocket probing depth) and patient satisfaction (oral health impact profile (OHIP-49), denture complaints questionnaire and general satisfaction score (GSS)) were compared. The peri-implant bone level was estimated using intra-oral radiographs (student T-test).

Results: Implant survival was 96.7% in the locator group and 97.9% in the bar group. No overdentures had to be remade. Patient satisfaction was significantly greater in the bar group when rated by OHIP-49 sum score and by GSS. When comparing the denture complaints questionnaire and the separate OHIP-49 item scores, no significant difference was found. There was not a significant difference in hygiene and soft tissue conditions. Marginal bone loss was estimated 0.58 +/- 0.71 mm for locators and 0.31 +/- 0.47 mm for bars.

Conclusions: Maxillary overdentures on four implants retained by bars or locators were compared. Bone loss was within an acceptable range for both groups after 1 year. However, less bone was lost in the bar group. Even though both treatment options improved patient satisfaction, bars seem to be particularly beneficial with regard to OHIP-49 sum score. (C) 2019 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalJournal of Prosthodontic Research
Volume64
Issue number1
Early online date11-Jun-2019
Publication statusPublished - Jan-2020

    Keywords

  • Dental implant, Maxilla, Overdenture, Attachment systems, Bar, Locator, MARGINAL BONE LOSS, QUALITY-OF-LIFE, MANDIBULAR OVERDENTURES, STRESS-DISTRIBUTION, CLINICAL-TRIAL, SATISFACTION, PATIENT, SYSTEMS, PERFORMANCE, PROSTHESES

ID: 85453356