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Volume 8 , Issue 6
November/December 1995

Pages 511-516

Inaccurate Fit of Implant Superstructures. Part 1: Stresses Generated on the Superstructure Relative to the Size of Fit Discrepancy


PMID: 8595110

The laboratory study used a photoelastic-coating technique investigate the relationship between the magnitude and location of discrepancies of fit and the maount of distribution of surface stresses on an implant superstructure. For the test superstructure involving four abutments and a signle fit discrepancy, maximum surface stress was found over the intermediate abutment, regardless of the location of the fit error. The results show a positive relationship between the size of the fit discrepancy and the magnitude of stress on the superstructure of gaps of up to 104 um at an end abutment and 55 um at an intermediate abutment, when the gold screws were tightened at 10-Ncm torque. o t

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