title: Evaluation of the Mechanical Behavior and Marginal Accuracy of Stock and Laser-Sintered Implant Abutments.
abstract: OBJECTIVE
  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.
  
  
  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.
authors.forename: Raquel
authors.initials: R
authors.lastname: Alonso-Pérez
authors.forename: José F
authors.initials: JF
authors.lastname: Bartolomé
authors.forename: Alberto
authors.initials: A
authors.lastname: Ferreiroa
authors.forename: María P
authors.initials: MP
authors.lastname: Salido
authors.forename: Guillermo
authors.initials: G
authors.lastname: Pradíes
mesh_terms: D002858:Chromium Alloys; D003035:Cobalt; D017076:Computer-Aided Design; D003442:Crowns; D059605:Dental Implant-Abutment Design; D018772:Dental Marginal Adaptation; D003799:Dental Stress Analysis; D066298:In Vitro Techniques; D007834:Lasers; D013499:Surface Properties; D014025:Titanium; D019415:Torque
chemical_list: D002858:Chromium Alloys; D003035:Cobalt; D014025:Titanium