NDLI: Measurements of the Residual Stresses Due to Cement Polymerization for Cemented Hip Implants

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Nun˜o, Natalia Plamondon, Dominic
Copyright Year	2003
Abstract	In cemented hip implant, the polymethyl methacrylate (PMMA) also called bone cement is used as grouting material between the implant and the bone. During the operation, the bone cement still in a liquid form is inserted between the femoral component and the bone. During polymerisation of the cement, residual stresses are generated in the bulk cement. The process of cement curing is a complex solidification phenomenon where transient stresses are generated and the residual stresses vary with different boundary conditions during curing (Ahmed et al., 1982). In particular, normal stresses are generated at the implant-PMMA interface resulting in a press-fit problem. The cement does not have a chemical bond with the stem nor the bone, however it fills completely the space between the two and serves to distribute the load being transferred from the stem to the bone. An experiment has been devised to measure directly the residual stresses of the bone cement to reproduce the in-vivo behaviour of the prosthesis. An idealized prosthesis (19-mm diameter) is used. A subminiature load cell (9.5-mm diameter) is inserted inside the stem to measure directly the radial residual stresses of the PMMA on the stem. Bone cement polymerizes between the stem and the synthetic bone (40-mm outside diameter). The tests are conducted at body temperature of 37°C.
Sponsorship	Bioengineering Division
Starting Page	291
Ending Page	292
Page Count	2
File Format	PDF
ISBN	0791837106
DOI	10.1115/IMECE2003-43979
Volume Number	Advances in Bioengineering
Conference Proceedings	ASME 2003 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2003-11-15
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Hip joint prostheses Prostheses Cements (adhesives) Temperature Polymerization Residual stresses Stress Solidification Transients (dynamics) Grouting Boundary-value problems Bone Hardening (curing) Press fits
Content Type	Text
Resource Type	Article

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Effect of Tapered Geometry on the Load Transfer of an Idealized Cemented Hip Implant

Effect of Tapered Geometry on the Load Transfer of an Idealized Cemented Hip Implant

Residual Stresses in Self-Curing Bone Cement During Hip Arthroplasty

Simulation of the Residual Stresses Generated Due to Cement Polymerization in a THA

Transient and Residual Stresses and Displacements in Self-Curing Bone Cement—Part II: Thermoelastic Analysis of the Stem Fixation System

Transient and Residual Stresses and Displacements in Self-Curing Bone Cement—Part I: Characterization of Relevant Volumetric Behavior of Bone Cement

Thermal Curing and Strength of PMMA Bone Cement

The Role of Stress Concentrations in the Bone Cement Mantle

Interaction Between Bone Cement Cracking and Non-Slip Implant Interfaces

Measurements of the Residual Stresses Due to Cement Polymerization for Cemented Hip Implants

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