The effects of superstructure fit and loading on individual implant units: Part 2. The effects of loading a superstructure with varying degrees of fit.
This study investigated force transmission in an implant supported bridge with varying degrees of fit. The project utilised an in vitro model of five implant fixtures mounted linearly and rigidly. These supported a well-fitting cast gold superstructure via implant abutments fitted with strain gauges so as to function as force transducers. Gaps of 10-110 microns were created at the middle and one terminal abutment and loads of 50N applied over the cantilever and 230N between the terminal abutments. Force distribution was uneven, compression, tension and torque observed, and loading of the cantilever noted to generate large forces.
Isa
Z M
ZM
Department of Prosthetic Dentistry, Eastman Dental Institute for Oral Health Care Sciences, London, UK.
Hobkirk
J A
JA
D001732:Bite Force; D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D008422:Materials Testing; D017755:Prosthesis Fitting; D019415:Torque
D015921:Dental Implants