Knee Surg Relat Res.  2014 Sep;26(3):162-167. 10.5792/ksrr.2014.26.3.162.

Short-Term Results of Total Knee Arthroplasty with Anterior-Posterior Glide LCS Mobile-Bearing System

• Kim KT
• Kang MS
• Lim YH
• Park JW
• Wang L

• KMID: 2223274
• DOI: http://doi.org/10.5792/ksrr.2014.26.3.162

Abstract

PURPOSE
To evaluate the clinical and radiological results of total knee arthroplasty (TKA) using the anterior-posterior glide (APG) low contact stress (LCS) mobile-bearing system.
MATERIALS AND METHODS
We evaluated 130 knees in 117 patients who had undergone TKA with APG LCS mobile-bearing system between September 2005 and July 2007 and could be followed over 5 years. The mean follow-up period was 68 months. The clinical and radiological results were evaluated using the American Knee Society Scoring System, Oxford knee score and the American Knee Society Roentgenographic Evaluation and Scoring System. And we analyzed short-term postoperative complications.
RESULTS
The average range of motion of the knee joint was 107.9degrees (range, 70degrees to 135degrees) preoperatively and 125.2degrees (range, 90degrees to 135degrees) at the last follow-up. The average knee and functional scores were improved from 39.1 and 42.0 to 71.2 and 75.6, respectively, between the preoperative and last follow-up evaluation. The Oxford knee score was decreased from 42.9 preoperatively to 23.1 at the last follow-up. The femoro-tibial angle (anatomical axis) changed from 10.1degrees varus preoperatively to 3.3degrees valgus at the last follow-up. Radiolucency was observed in 14% of all cases. There were 1 case of traumatic dislocation of the polyethylene liner, 1 case of aseptic loosening and 6 cases of posterior instability because of posterior cruciate ligament (PCL) insufficiency.
CONCLUSIONS
TKA with APG LCS mobile-bearing system demonstrated relatively good short-term clinical and radiological results. However, further considerations for posterior instability associated with PCL insufficiency are needed.

Keyword

Knee; Arthroplasty; Anterior-posterior glide; Low contact stress; Mobile-bearing; Posterior instability

MeSH Terms

Arthroplasty*
Dislocations
Follow-Up Studies
Humans
Knee Joint
Knee*
Polyethylene
Posterior Cruciate Ligament
Postoperative Complications
Range of Motion, Articular
Polyethylene