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- Title
In Vitro Cyclic Dislodging Test on Retentive Force of Two Types of Female Parts of SFI-Bar.
- Authors
Ling Wei; Qinwei Ma; Xiaotong Qin; Shaoxia Pan; Wei, Ling; Ma, Qinwei; Qin, Xiaotong; Pan, Shaoxia
- Abstract
<bold>Purpose: </bold>This study aimed to compare the difference in mechanical behavior between two types of female-part clips of the Stress-Free Implant Bar (SFI-Bar) system during simulation of insertion-removal cycles.<bold>Materials and Methods: </bold>A total of 10 samples simulating SFI-Bar-attachment-retained implant overdentures were fabricated and randomly divided into two groups (n = 5). One group used E-clips (Elitor alloy) as the female part of the SFI-Bar, and the other used T-clips (all titanium grade IV with red nylon inserts). A total of 14,000 insertion-removal cycles were carried out on each sample. Retentive forces from each cycle were recorded for analysis.<bold>Results: </bold>Significant differences were found between the two groups (P < .05).<bold>Conclusion: </bold>The retentive force of E-clips increased as the number of dislodging cycles increased, suggesting that some adjustment may be needed to lower this part's retentive force. T-clips with changeable nylon inserts were deformed after about 4,200 insertion-removal cycles, which interfered with insertion. This indicated that T-clips may need replacement after 2 to 3 years of clinical use.
- Subjects
DENTAL implants; OVERLAY dentures; TITANIUM; EDENTULOUS mouth; MANDIBLE; MATERIAL fatigue; ACRYLIC resins; CYCLIC loads; DENTURE equipment; DENTAL metallurgy; COMPARATIVE studies; DENTAL materials; DENTURES; MATERIALS testing; RESEARCH methodology; MEDICAL cooperation; NYLON; RESEARCH; STATISTICAL sampling; TIME; EVALUATION research; PHYSIOLOGIC strain; EQUIPMENT &; supplies
- Publication
International Journal of Prosthodontics, 2016, Vol 29, Issue 3, p293
- ISSN
0893-2174
- Publication type
journal article
- DOI
10.11607/ijp.4769