Strain Analysis of the Proximal Femur After Total Hip Replacement PDF Download
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Author: DS. Hungerford
Publisher:
ISBN:
Category : Alloys
Languages : en
Pages : 15
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Book Description
Strain analysis of human cadaver femora after cemented total hip arthroplasty (THA) has demonstrated a reduction in stress transfer along the proximal femur. The principal objective of this study was to determine the effect of the cementless application of a pressfit, porous-coated prosthesis on the strain experienced by the proximal femur. Using the photoelastic coating technique (PECT), five human cadaver specimens were subjected to strain analysis before and after cementless arthroplasty with a PCA total hip prosthesis. After total hip replacement, the strain magnitudes were reduced for all points along the medial border when the femur was subjected to loading conditions. A reduction of the level of strain experienced by the calcar ranged from 34.7 to 43.7% under loads ranging from 750 to 2000 N--a considerably smaller reduction than that reported by previous investigators. The region of the greater trochanter was the only area of the lateral surface to demonstrate an increase in strain magnitude after THA; the other, more distal points laterally experienced a reduced level of strain. Increases in strain magnitude, although not statistically significant, were detected along the anterior aspect of the femora. Significant decreases in strain were observed at the two more distal points posteriorly, with no significant change proximally. As this investigation is an evaluation only of the immediate effect of the design of the prosthesis in achieving a press fit, and the specimens are without the benefit of bony ingrowth, additional studies are necessary to determine the effect of biologic ingrowth on the distribution of strain within the proximal femur.
Author: DS. Hungerford
Publisher:
ISBN:
Category : Alloys
Languages : en
Pages : 15
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Book Description
Strain analysis of human cadaver femora after cemented total hip arthroplasty (THA) has demonstrated a reduction in stress transfer along the proximal femur. The principal objective of this study was to determine the effect of the cementless application of a pressfit, porous-coated prosthesis on the strain experienced by the proximal femur. Using the photoelastic coating technique (PECT), five human cadaver specimens were subjected to strain analysis before and after cementless arthroplasty with a PCA total hip prosthesis. After total hip replacement, the strain magnitudes were reduced for all points along the medial border when the femur was subjected to loading conditions. A reduction of the level of strain experienced by the calcar ranged from 34.7 to 43.7% under loads ranging from 750 to 2000 N--a considerably smaller reduction than that reported by previous investigators. The region of the greater trochanter was the only area of the lateral surface to demonstrate an increase in strain magnitude after THA; the other, more distal points laterally experienced a reduced level of strain. Increases in strain magnitude, although not statistically significant, were detected along the anterior aspect of the femora. Significant decreases in strain were observed at the two more distal points posteriorly, with no significant change proximally. As this investigation is an evaluation only of the immediate effect of the design of the prosthesis in achieving a press fit, and the specimens are without the benefit of bony ingrowth, additional studies are necessary to determine the effect of biologic ingrowth on the distribution of strain within the proximal femur.
Author: Charles Rivière
Publisher: Springer Nature
ISBN: 3030242439
Category : Medical
Languages : en
Pages : 346
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Book Description
This open access book describes and illustrates the surgical techniques, implants, and technologies used for the purpose of personalized implantation of hip and knee components. This new and flourishing treatment philosophy offers important benefits over conventional systematic techniques, including component positioning appropriate to individual anatomy, improved surgical reproducibility and prosthetic performance, and a reduction in complications. The techniques described in the book aim to reproduce patients’ native anatomy and physiological joint laxity, thereby improving the prosthetic hip/knee kinematics and functional outcomes in the quest of the forgotten joint. They include kinematically aligned total knee/total hip arthroplasty, partial knee replacement, and hip resurfacing. The relevance of available and emerging technological tools for these personalized approaches is also explained, with coverage of, for example, robotics, computer-assisted surgery, and augmented reality. Contributions from surgeons who are considered world leaders in diverse fields of this novel surgical philosophy make this open access book will invaluable to a wide readership, from trainees at all levels to consultants practicing lower limb surgery
Author: David Patrick Brennan
Publisher:
ISBN:
Category :
Languages : en
Pages : 358
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Book Description
Author: James V. Bono
Publisher: Springer Science & Business Media
ISBN: 1461214068
Category : Medical
Languages : en
Pages : 660
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Book Description
An in-depth understanding of a comprehensive approach to the management of radius fractures and their complications. The authors -- world renowned experts in the field -- present practical, clinical information from their extensive experience in the treatment of these fractures. Topics include the authors' classification as well as decision- making and tactics in the conservative and operative management of all types of radius fractures. Topics covered include: bending fractures of the metaphysis, shearing and compression fractures of the joint surface, avulsion fractures, radio-carpal fracture and dislocation, combined fractures, high velocity injury and malunions. In addition, chapters deal with surgical techniques and approach as well as with complications. With over 500 illustrations, this is the definitive volume on these challenging fractures, their complete treatment, and the management of complications.
Author: Edward Charles Jauch
Publisher:
ISBN:
Category : Artificial hip joints
Languages : en
Pages : 242
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Book Description
Author: Hans-Holger Bleß
Publisher: Springer
ISBN: 3662559188
Category : Medical
Languages : en
Pages : 144
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Book Description
This book is published open access under a CC BY 4.0 license. White Paper on Joint Replacement This White Paper details the status of hip and knee arthroplasty care in Germany. Hip and knee replacements are amongst the most frequently performed procedures and usually become necessarily due to age-related wear of the joint, osteoarthritis and fractures of the femoral neck. In light of demographic change, demands with regard to standards of care and the procedures are likely to rise. Contents • This White Paper contains information on indications, procedures, health economic aspects and the healthcare system stakeholders involved. • It portrays current developments with regard to the prevalence of hip and knee arthroplasty, the healthcare situation and quality of care within the chain of medical care. • This book is complemented by a chapter assessing the current situation from an expert perspective with contributions from renowned experts in the fields of science, medical technology and medical practice. This book addresses people involved in shaping and representing the healthcare system from a variety of fields including medical professions, health insurances and health sciences as well as journalists and patient representatives.
Author: Shinichi Imura
Publisher: Springer Science & Business Media
ISBN: 4431682376
Category : Medical
Languages : en
Pages : 327
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Book Description
This volume is the arranged monograph based on the Hip Biomechanics Symposium held on November 1992 in Fukui, Japan. It consists of six major sections: loading, gait analysis, total hip arthroplasty, osteotomies, motion analysis, and stem designs for stability. The most important aim of the volume is to overview the current research outcomes in the biomechanical approaches to adult hip diseases. Each of these sections brings together many of the leading researchers in this field. The information found here will be of benefit to orthopedic surgeons and researchers in the related areas.
Author: Jorge O. Galante
Publisher: Lippincott Williams & Wilkins
ISBN:
Category : Medical
Languages : en
Pages : 566
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Book Description
The proceedings of the Eighth Annual Bristol-Myers Squibb/Zimmer Othopaedic Symposium, held in Chicago, November 1993, begin with an analysis of revision hip surgery from a clinical perspective utilizing information from the Swedish Hip Registry, followed by 54 papers in sections devoted to mechanisms of failure (particulates/biological events), bone remodeling, bone grafting and substitutes, diagnostic techniques, clinical evaluation of revision surgery, socioeconomic issues, surgical approaches and cement and component removal, clinical results of revision surgery, acetabular reconstruction, femoral reconstruction, new technologies, massive grafts in femoral reconstruction, and infection. Annotation copyright by Book News, Inc., Portland, OR
Author: Mark A. Gomez
Publisher:
ISBN:
Category : Arthroplasty
Languages : en
Pages : 108
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Book Description
Author: J. Charnley
Publisher: Springer Science & Business Media
ISBN: 364267013X
Category : Medical
Languages : en
Pages : 383
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Book Description
The theme of this work is the application of the engmeermg theory of frictional torque to total hip replacement. The author adhered tenaciously to this theory, involving the use of a small-diameter femoral head, throughout the epoch when the large-diame ter, metal-to-metal design dominated the field. During that considerable period general satisfaction with the early results rendered criticisms of the large-diameter head unwelcome. There was a formidable array of counter criticism: the small head would pierce a film of synovial fluid; the small head would wear the socket too rapidly; the small head would always have a high risk of dislocation; detachment of the trochanter, to achieve precise orientation for the small head, was unacceptable. But all these objections have now been largely overcome. Lubrication of high molecular weight polyethylene (HMWP) on metal is now accepted as being mainly by the boundary regime with thick fluid films playing no part. We now know that HMWP can indeed tolerate the very high stresses imposed by the small head and in tribological theory there may even be some advantage in high stress. Dislocation is now known not to be an automatic sequel to the small head.
