NDLI: Cortical Bone Viscoelasticity and Fixation Strength of Press-Fit Femoral Stems: An Model

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Norman, T. L. Ackerman, E. S. Smith, T. S. Gruen, T. A. Yates, A. J. Blaha, J. D. Kish, V. L.
Copyright Year	2006
Abstract	Cementless total hip femoral components rely on press-fit for initial stability and bone healing and remodeling for secondary fixation. However, the determinants of satisfactory press-fit are not well understood. In previous studies, human cortical bone loaded circumferentially to simulate press-fit exhibited viscoelastic, or time dependent, behavior. The effect of bone viscoelastic behavior on the initial stability of press-fit stems is not known. Therefore, in the current study, push-out loads of cylindrical stems press-fit into reamed cadaver diaphyseal femoral specimens were measured immediately after assembly and 24h with stem-bone diametral interference and stem surface treatment as independent variables. It was hypothesized that stem-bone interference would result in a viscoelastic response of bone that would decrease push-out load thereby impairing initial press-fit stability. Results showed that push-out load significantly decreased over a 24h period due to bone viscoelasticity. It was also found that high and low push-out loads occurred at relatively small amounts of stem-bone interference, but a relationship between stem-bone interference and push-out load could not be determined due to variability among specimens. On the basis of this model, it was concluded that press-fit fixation can occur at relatively low levels of diametral interference and that stem-bone interference elicits viscoelastic response that reduces stem stability over time. From a clinical perspective, these results suggest that there could be large variations in initial press-fit fixation among patients.
Starting Page	13
Ending Page	17
Page Count	5
File Format	PDF
ISSN	01480731
e-ISSN	15288951
Journal	Journal of Biomechanical Engineering
Volume Number	128
Issue Number	1
DOI	10.1115/1.2133766
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	2005-05-06
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bone Power presses Stability Stress Viscoelasticity
Content Type	Text
Resource Type	Article
Subject	Physiology (medical) Biomedical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Cortical Bone Viscoelasticity and Fixation Strength of Press-Fit Femoral Stems: A Finite Element Model

Effects of Fit and Bonding Characteristics of Femoral Stems on Adaptive Bone Remodeling

An Analytical Approach to Study the Intraoperative Fractures of Femoral Shaft During Total Hip Arthroplasty

The Effect of Under-Reaming on the Cup/Bone Interface of a Press Fit Hip Replacement

The Influence of Stress Frequency on the Fatigue Strength of Cortical Bone

High Speed Fracture Fixation: Assessing Resulting Fixation Stability and Fastener Withdrawal Strength

Residual Stress Around the Cortical Surface in Bovine Femoral Diaphysis

Biomechanical Factors Affecting Fracture Stability and Femoral Bursting in Closed Intramedullary Rod Fixation of Femur Fractures

Spatial Micromovements of Uncemented Femoral Components After Torsional Loads

Cortical Bone Viscoelasticity and Fixation Strength of Press-Fit Femoral Stems: An Model

Similar Documents

Cortical Bone Viscoelasticity and Fixation Strength of Press-Fit Femoral Stems: A Finite Element Model

Effects of Fit and Bonding Characteristics of Femoral Stems on Adaptive Bone Remodeling

An Analytical Approach to Study the Intraoperative Fractures of Femoral Shaft During Total Hip Arthroplasty

The Effect of Under-Reaming on the Cup/Bone Interface of a Press Fit Hip Replacement

The Influence of Stress Frequency on the Fatigue Strength of Cortical Bone

High Speed Fracture Fixation: Assessing Resulting Fixation Stability and Fastener Withdrawal Strength

Residual Stress Around the Cortical Surface in Bovine Femoral Diaphysis

Biomechanical Factors Affecting Fracture Stability and Femoral Bursting in Closed Intramedullary Rod Fixation of Femur Fractures

Spatial Micromovements of Uncemented Femoral Components After Torsional Loads

Cortical Bone Viscoelasticity and Fixation Strength of Press-Fit Femoral Stems: An Model