Knee Surg Relat Res.  2013 Mar;25(1):19-24. 10.5792/ksrr.2013.25.1.19.

Clinical Outcome of IM-Guided Total Knee Arthroplasty with Inappropriate Femoral Resection in Coronal Plane

• Moon YW
• Han JH
• Lee KH
• Jang SW
• Seo JG

• KMID: 2223321
• DOI: http://doi.org/10.5792/ksrr.2013.25.1.19

Abstract

PURPOSE
The purpose of this study was to evaluate clinical results and accuracy of femoral cutting in the coronal plane in total knee arthroplasty (TKA) using a fixed length intramedullary guide.
MATERIALS AND METHODS
From 2005 to 2008, 101 patients (154 knees) underwent TKA (NexGen LPS implant). The minimal follow-up period was 3 years (mean, 4.4 years). The patients were divided into two groups (group 1, 94< or =alpha angle<98; group 2, 94>alpha, 98< or =alpha). Mechanical axis deviation (MAD), patellar tilting angle (PTA), Knee Society Knee Score (KSKS), and Knee Society Function Score (KSFS) were measured in both groups.
RESULTS
There were 120 knees in group 1 and 34 knees in group 2. There was no significant intergroup difference in the postoperative MAD (group 1, 1.59degrees; group 2, 1.91degrees). The number of outliers with > or =2degrees MAD was 65 in group 1 and 24 in group 2. The mean PTA, KSKS, and KSFS were 10.17degrees, 96.0, and 96.6, respectively, in group 1 and 11.58degrees, 84.5, and 85.5, respectively, in group 2.
CONCLUSIONS
The percentage of coronal alignment outliers was relatively high (34 in 154 cases, 22%) after TKA using a fixed length intramedullary guide. However, there was no statistically significant intergroup difference in clinical results (KSKS, p=0.67; KSFS, p=0.56).

Keyword

Total knee arthroplasty; Intramedullary guide; Mechanical axis deviation; Alpha angle

MeSH Terms

Adenine Nucleotides
Arthroplasty
Axis, Cervical Vertebra
Follow-Up Studies
Humans
Knee
Mycophenolic Acid
Adenine Nucleotides
Mycophenolic Acid