AI Article Synopsis
- There is currently no evidence that internal anti-rotation configurations outperform external ones in terms of marginal fit and microgap size.
- A study compared various internal and external anti-rotation implant-abutment assemblies, evaluating discrepancies and gaps using precision microscopes.
- Results showed that discrepancies varied widely, and SEM images indicated no correlation between the geometrical factors and the type of anti-rotation configuration used.
Article Abstract
To date, there is no evidence that internal anti-rotation configurations are better than external ones. As part of a study to clarify the features and advantages of internal anti-rotation configurations, the objective of the present investigation was to compare and evaluate the marginal fit and size of microgap at the implant-abutment interface for several external and internal anti-rotation configurations. To this end, three internal connection and two external hex connection implant-abutment assemblies were examined in this study. The implant-abutment interface (I-A interface) was evaluated using three geometrical factors: vertical and horizontal discrepancies and size of microgap. Marginal fit and microgap size were measured by a scanning laser microscope. The I-A interface was also observed using a scanning electron microscope. Mean vertical discrepancy ranged from 22.6 to 62.2 microm, while horizontal discrepancy ranged from -27.1 to 16.0 microm. The microgap values of all I-A interfaces assessed in this study ranged from 2.3 to 5.6 microm. In conclusion, SEM images of I-A interface suggested no relationship between the geometrical factors and the type of anti-rotation configuration.
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| http://dx.doi.org/10.4012/dmj.27.29 | DOI Listing |
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