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Comparison of Retention and Stability of Implant-retained Overdentures Based Upon Implant Location, Number, and Distribution

出版	Ohio State University, 2012
URL	http://books.google.com.hk/books?id=MHVjkgEACAAJ&hl=&source=gbs_api

註釋Methods and Materials: An experiment was undertaken utilizing a model simulating a mandibular edentulous ridge with 11 dental implants in positions on the model approximating the tooth position in the natural dentition. A cobalt-chromium cast framework with 3 loops, acrylic resin inside the housing, and chains attached to a universal testing machine was used to measure peak load (N) required to disconnect an attachment. Four different types of attachments were used in various positions on the model in sequence. Part I of the study evaluated the effect of implant location upon retention and stability of a simulated 2 implant-retained overdenture. Part II of the study evaluated retention and stability of 1,2,3, or 4 implant-retained overdentures based upon implant number and distribution. For each group, 10 measurements were made of peak dislodging forces. Means were calculated and differences among the systems, directions, and groups were identified using a repeated measured analysis of variance at the p