Analysis of differences in bone removal during femoral box osteotomy for primary total knee arthroplasty

Graceffa, Angelo and Indelli, Pier Francesco and Basnett, Kaitlyn and Marcucci, Massimiliano (2014) Analysis of differences in bone removal during femoral box osteotomy for primary total knee arthroplasty. Joints, 2 (2). pp. 76-80. ISSN 2282-4324

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Abstract

Purpose: this study was conducted to compare the quantity of intercondylar bone removed during femoral box osteotomy for implantation of three contemporary posterior stabilized (PS) total knee arthroplasty designs: Sigma PS (DePuy), Vanguard (Biomet) and Persona (Zimmer). Methods: we compared the maximum volumetric bone resection required for the housing of the PS mechanism of these three designs. Bone removal by each PS box cutting jig was three-dimensionally measured. The differences between the three designs were analyzed by the Kruskal-Wallis test. The Mann-Whitney U-test was used for pairwise comparisons. The level of significance was set at p<0.05. Results: for small-size implants, the average box osteotomy volume of Persona was significantly smaller than the Vanguard and Sigma PS volumes (p=0.003). The mean difference between Vanguard and Sigma PS (p=0.01) was also significant. For medium size implants, the mean difference between Persona and Sigma PS (p=0.008) and the mean difference between Vanguard and Sigma PS (p=0.01) were statistically significant. For large size implants, the mean difference between Vanguard and Sigma PS (p=0.01) and the mean difference between Sigma PS and Persona (p=0.008) were statistically significant. Conclusions: irrespective of implant size, the Persona cutting jig always resected significantly less bone than did Vanguard and Sigma PS. Clinical Relevance: although this study does not establish any clinical relevance of removing more or less bone at primary TKA, its results suggest that if a PS design is indicated, it is preferable to select a model which resects less distal femoral bone.

Item Type:	Article
Uncontrolled Keywords:	Bone resection, box osteotomy, cruciate substituting, posterior stabilized, total knee arthroplasty
Subjects:	600 Tecnologia - Scienze applicate > 610 Medicina e salute (Classificare qui la tecnologia dei servizi medici) > 617 Rami vari della medicina; Chirurgia > 617.5 Medicina regionale; Chirurgia regionale
Depositing User:	Chiara D'Arpa
Date Deposited:	09 Apr 2015 13:17
Last Modified:	09 Apr 2015 13:17
URI:	http://eprints.bice.rm.cnr.it/id/eprint/10169

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