In vitro stress analyses of dental implants supporting screw-retained and cement-retained prostheses.
A photoelastic and strain gauge analysis was performed to evaluate the stress transferred to implants through the provisional-cement-retained, the permanent-cement-retained, and the screw-retained prostheses. The deflections of the prostheses at the time of the loading were also measured. In the single crown test, the provisional-cement-retained crowns transferred less stress. In the two-unit fixed partial denture test, there were no differences between the three different prostheses. In the two-implant supported distal cantilevered prostheses, the screw-type and the permanent-cement-retained prostheses developed more stress around the apex of both implants. The permanent-cement-retained prostheses acted almost the same as the screw-type.
Kim
W D
WD
Boston University Goldman School of Dental Medicine, USA.
Jacobson
Z
Z
Nathanson
D
D
D001718:Birefringence; D002484:Cementation; D003442:Crowns; D000044:Dental Abutments; D017268:Dental Prosthesis Retention / Q000295:instrumentation / Q000379:methods*; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed