Comparison of the Effect of Ball and Bar Attachment Designs on Retention and Stability of Mandibular Implant-Supported Overdentures
Author(s):
Abstract:
Objectives
The present study evaluated the effect of bar and ball attachment designs on retention and stability of a mandibular overdenture supported by four implants.Methods
An edentulous mandibular acrylic resin model with four implants in the anterior part of the ridge (A, B, D and E) was fabricated. A metal framework simulating the overdenture was also fabricated. Totally, 30 overdentures were divided into three groups based on the attachment design; BL: Four ball attachments in A, B, D and E positions; BB: One bar attachment between B and D positions and two ball attachments at positions A and E; BR: Bar attachments between the positions A, B, D and E with two posterior extensions. To evaluate the retention and stability of the overdenture, tensile dislodging forces were applied in three directions of vertical, oblique and anterior-posterior by a universal testing machine. One-way ANOVA and Tukeys HSD test were performed to analyze the data. All tests were carried out at 0.05 level of significance.Results
There were statistically significant differences between the groups in the peak load (PConclusion
The attachment designs affected the retention and stability of mandibular implant-supported overdenturesKeywords:
Language:
English
Published:
Journal of Dental School, Volume:35 Issue: 1, winter 2017
Pages:
41 to 52
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