首页 | 本学科首页   官方微博 | 高级检索  
     


The role of fluid hydrostatic pressure in bone-implant interface load transfer
Authors:Dr. Jack L. Lewis  Cary Keller  S. David Stulberg  John Steege  Michael Santare
Affiliation:(1) Rehabilitation Engineering Program Department of Orthopaedic Surgery, Northwestern University Medical School, 345 East Superior Street, Rm. 1441, Chicago, Illinois;(2) Division of Orthopaedic Surgery, University of Chicago Hospitals, 345 East Superior Street, Rm. 1441, 60611 Chicago, Illinois
Abstract:
Permeability of the soft tissue-bone system surrounding artificial joints fixed in cancellous bone was measured in four adult dogs after implants had been in place 2 months. Fluid was forced through a cavity formed by removal of the implant, the cavity was capped with a stopper to allow for pressure generation. Surface permeability of the 2-month-old implant cavity was 45 times less than the permeability of freshly drilled holes in cancellous bone. A mathematical model of a rigid implant resting on a biphasic solid-fluid layer showed the fluid carried 90% of the load when the implant cavity permeability was assumed, but only 27% when the freshly drilled permeability was used. The results suggest caution in interpreting finite-element models with bonded interfaces and suggest a possible role of the fluid in biological response at the interface.
Keywords:Implant  Interface  Fluid
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号