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The International Journal of Prosthodontics



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Int J Prosthodont 30 (2017), No. 2     21. Mar. 2017
Int J Prosthodont 30 (2017), No. 2  (21.03.2017)

Page 136-138, doi:10.11607/ijp.5089, PubMed:28267820

Evaluation of the Mechanical Behavior and Marginal Accuracy of Stock and Laser-Sintered Implant Abutments
Alonso-Pérez, Raquel / Bartolomé, José F. / Ferreiroa, Alberto / Salido, María P. / Pradíes, Guillermo
Purpose: The aim of this study was to evaluate the marginal accuracy and mechanical behavior of implant-supported crowns restored with original stock abutments and nonoriginal computer-aided design/computer-assisted manufacture laser-sintered abutments.
Materials and Methods: A total of 26 implants were divided in two groups (n = 13 each) as follows: implants connected to original stock abutments (OS) and implants connected to nonoriginal laser-sintered abutments (LS). Of these, 10 samples were cross-sectioned to measure the marginal accuracy under a scanning electron microscope. In addition, 16 samples were used to study the mechanical behavior. Two tests were performed: (1) static load and (2) dynamic load after thermocycling with artificial saliva.
Results: OS exhibited the best marginal accuracy; however, the LS gap was within the clinically acceptable range of marginal discrepancy. No significant differences were found in the mechanical tests.
Conclusions: Both abutments are acceptable alternatives to restore implants, although the original abutments showed better fit than nonoriginals.