PURPOSE: The effect of two levels of prosthesis misfit on prosthetic screw stability was evaluated. MATERIALS AND METHODS: Two levels of vertical discrepancies--100 and 175 microns--were introduced between an implant-supported complete denture and the terminal abutment. An implant-supported complete denture without vertical discrepancy served as a control. Cyclic load was delivered vertically on the cantilever portion of the prosthesis next to the terminal abutment for 48 hours for each trial. A total of seven sets of new screws were tested for each level of fit. RESULTS: The results revealed significant prosthetic screw instability at both the 100- and 175-micron levels of discrepancy. CONCLUSION: Vertical discrepancies of 100 and 175 microns introduced between an implant-supported fixed complete denture and the terminal abutment resulted in significant prosthetic screw instability.
PURPOSE: The effect of two levels of prosthesis misfit on prosthetic screw stability was evaluated. MATERIALS AND METHODS: Two levels of vertical discrepancies--100 and 175 microns--were introduced between an implant-supported complete denture and the terminal abutment. An implant-supported complete denture without vertical discrepancy served as a control. Cyclic load was delivered vertically on the cantilever portion of the prosthesis next to the terminal abutment for 48 hours for each trial. A total of seven sets of new screws were tested for each level of fit. RESULTS: The results revealed significant prosthetic screw instability at both the 100- and 175-micron levels of discrepancy. CONCLUSION: Vertical discrepancies of 100 and 175 microns introduced between an implant-supported fixed complete denture and the terminal abutment resulted in significant prosthetic screw instability.
Authors: Rafael L X Consani; Leonardo G Sonehara; Marcelo F Mesquita; Valentim A R Barão; Conrado R Caetano Journal: J Oral Biol Craniofac Res Date: 2015-07-15
Authors: Cleide Gisele Ribeiro; Maria Luiza Cabral Maia; Susanne S Scherrer; Antonio Carlos Cardoso; H W Anselm Wiskott Journal: J Appl Oral Sci Date: 2011-07-01 Impact factor: 2.698