Knee Surg Relat Res.  2013 Dec;25(4):174-179. 10.5792/ksrr.2013.25.4.174.

Mid-term Results of Single-Radius Cruciate Retaining Total Knee Arthroplasty: Minimum 5 Year Follow-up

• Kim KM
• Chun KC
• Hwang JS
• Chun CH

• KMID: 2230731
• DOI: http://doi.org/10.5792/ksrr.2013.25.4.174

Abstract

PURPOSE
The single-radius design of the knee implant was introduced to improve the results of total knee arthroplasty (TKA) by reducing maximum extensor forces, and it also represents more physiologic quadriceps force pattern, which could have a positive effect on knee function after TKA. We studied mid-term results of single-radius designed cruciate retaining (CR) TKA.
MATERIALS AND METHODS
We analyzed the functional improvement and radiological osteolytic pattern after TKA using the single-radius Scorpio CR prosthesis. TKA was performed on 102 knees. The mean follow-up period was 73.8 months. For clinical assessment, the range of motion (ROM), Harris hip score, and functional outcome score were obtained preoperatively and at last follow-up.
RESULTS
The average ROM was 100.2degrees preoperatively and 121.7degrees at last follow-up. The average knee score was 59.2 points preoperatively and 92.9 points at last follow-up. The average functional outcome score was improved from 51.9 points preoperatively to 85.4 points at last follow-up. Radiolucency was observed in four knees but all were non-progressive lesions smaller than 2 mm.
CONCLUSIONS
The clinical outcome of TKA using the single-radius CR prosthesis was good during the mid-term follow-up and the incidence of osteolysis was very rare.

Keyword

Knee; Arthroplasty; Cruciate-retaining; Single-radius

MeSH Terms

Arthroplasty*
Drugs, Chinese Herbal
Follow-Up Studies*
Hip
Incidence
Knee*
Osteolysis
Prostheses and Implants
Range of Motion, Articular
Drugs, Chinese Herbal