Journal article
In vitro analysis of post-fatigue reverse-torque values at the dental abutment/implant interface for a unitarian abutment design
Journal of prosthodontics, Vol.20(7), pp.503-509
10/2011
DOI: 10.1111/j.1532-849X.2011.00756.x
PMID: 21880095
Abstract
This study analyzed baseline and post-fatigue reverse-torque values (RTVs) for a specific brand control abutment relative to a third party compatible abutment. The purpose of this study was to compare the abutments' fatigue resistance to simulated function, using RTVs as an indication of residual preload at the implant/abutment interface.
Forty Straumann tissue-level implants were mounted in resin and divided into four groups (n = 10). Forty abutments were seated, 20 control and 20 third-party abutments, according to manufacturer guidelines. Ten abutments from each manufacturer were evaluated for RTV without fatigue loading, using a calibrated digital torque gauge to provide a baseline RTVs. Fatigue loading was carried out on the remaining ten specimens from each manufacturer according to ISO 14801 guidelines. A moving-magnet linear motor was used to load one specimen per sequence, alternating from 10 to 200 N at 15 Hz for 5×10(6) cycles. RTV was recorded post-fatigue loading. The results were subjected to two-sample t-testing and two-way ANOVA. Scanning electron microphotography was carried out on three specimens from both manufacturers at baseline and post-fatigue cycling to visualize thread geometry and the abutment/implant interface.
The data indicated that mean post-fatigue RTV observed for the control group was significantly higher than the third-party group (RTV 42.65 ± 6.70 N vs. 36.25 ± 2.63 N, p= 0.0161). Visual differences at the macro/microscopic level were also apparent for thread geometry, with third-party abutments demonstrating considerably greater variation in geometrical architecture than control specimens.
Within the limitations of this in vitro model, the effect of component manufacturer resulted in a significantly higher RTV in the control group (two-way ANOVA, p= 0.0032) indicating greater residual preload; however, there was no significant decrease in post-fatigue RTV for either manufacturer compared to baseline.
Details
- Title: Subtitle
- In vitro analysis of post-fatigue reverse-torque values at the dental abutment/implant interface for a unitarian abutment design
- Creators
- Paul M Cashman - Clinical Lecturer, Department of Prosthodontics, Eastman Dental Institute, University College London, London, United Kingdom. p.cashman@ucl.ac.ukRobert L SchneiderGalen B SchneiderClark M StanfordJames M ClancyFang Qian
- Resource Type
- Journal article
- Publication Details
- Journal of prosthodontics, Vol.20(7), pp.503-509
- DOI
- 10.1111/j.1532-849X.2011.00756.x
- PMID
- 21880095
- NLM abbreviation
- J Prosthodont
- ISSN
- 1059-941X
- eISSN
- 1532-849X
- Publisher
- United States
- Language
- English
- Date published
- 10/2011
- Academic Unit
- Preventive and Community Dentistry; Oral Pathology, Radiology and Medicine; Dentistry Administration; Prosthodontics; Orthopedics and Rehabilitation; Craniofacial Anomalies Research Center; Oral and Maxillofacial Surgery; Dental Research
- Record Identifier
- 9984066089302771
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