Comparison of Tibial Insert Polyethylene Damage in Rotating Hinge and Highly Constrained Total Knee Arthroplasty: A Retrieval Analysis

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• 作者：Kamal Bali ; MBBS ; MS ; DNB^a ; Douglas D. Naudie ; MD ; FRCSC^a ; James L. Howard ; MD ; MSc ; FRCSC^a ; Richard W. McCalden ; MD ; MPhil(Edin) ; FRCSC^a ; Steven J. MacDonald ; MD ; FRCSC^a ; Matthew G. Teeter ; PhD^a ; ^b ; ^c ;
• 关键词：polyethylene wear ; rotating hinge ; constrained liner ; damage ; instability
• 刊名：The Journal of Arthroplasty
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：31
• 期：1
• 页码：290-294
• 全文大小：416 K

文摘

This study compared the damage scores and damage patterns in 19 tibial inserts from rotating hinge (RH) implants with 19 inserts from highly constrained (HC) implants. Each insert was divided into 16 damage zones and each zone was subjectively graded from a scale of 0–3 for seven different damage modes. The overall damage scores were comparable for the two groups (RH: 64.1 ± 15.4; HC: 66.1 ± 29.0; P = 0.59). The HC group, however, had greater post damage (compared to the post-hole of RH) while the RH group had greater backside damage. The pattern of damage was also different, with burnishing and cold flow being more common in HC group while pitting, scratching and embedded debris were more common in the RH group.