The mechanical effect of the existing cement mantle on the in-cement femoral revision
| Autor: | Parnell Keeling, Alex Lennon, Patrick Kenny, Peter O'Reilly, Patrick J. Prendergast |
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| Rok vydání: | 2012 |
| Předmět: |
Reoperation
musculoskeletal diseases medicine.medical_specialty Surface Properties Revision procedure Test group Biophysics Statistical difference Femoral stem Biomimetic Materials Elastic Modulus Tensile Strength Cement mantle medicine Humans Orthopedics and Sports Medicine Femur Cementation Revision hip arthroplasty Orthodontics Cement business.industry Bone Cements technology industry and agriculture Adhesiveness equipment and supplies Surgery surgical procedures operative Preclinical testing business |
| Zdroj: | Clinical Biomechanics. 27:673-679 |
| ISSN: | 0268-0033 |
| DOI: | 10.1016/j.clinbiomech.2012.02.009 |
| Popis: | Background Cement-in-cement revision hip arthroplasty is an increasingly popular technique to replace a loose femoral stem which retains much of the original cement mantle. However, some concern exists regarding the retention of the existing fatigued and aged cement in such cement-in-cement revisions. This study investigates whether leaving an existing fatigued and aged cement mantle degrades the mechanical performance of a cement-in-cement revision construct. Methods Primary cement mantles were formed by cementing a polished stem into sections of tubular steel. If in the test group, the mantle underwent conditioning in saline to simulate ageing and was subject to a fatigue of 1 million cycles. If in the control group no such conditioning or fatigue was carried out. The cement-in-cement procedure was then undertaken. Both groups underwent a fatigue of 1 million cycles subsequent to the revision procedure. Findings Application of a Mann–Whitney test on the recorded subsidence (means: 0.51, 0.46, n = 10 + 10, P = 0.496) and inducible displacement (means: 0.38, 0.36, P = 0.96) revealed that there was no statistical difference between the groups. Interpretation This study represents further biomechanical investigation of the mechanical behaviour of cement-in-cement revision constructs. Results suggest that pre-revision fatigue and ageing of the cement may not be deleterious to the mechanical performance of the revision construct. Thus, this study provides biomechanical evidence to back-up recent successes with this useful revision technique. |
| Databáze: | OpenAIRE |
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