Knee Surg Relat Res.  2018 Dec;30(4):334-340. 10.5792/ksrr.18.020.

Comparison of Clinical Results and Risk of Patellar Injury between Attune and PFC Sigma Knee Systems

• Song SJ
• Kang SG
• Park CH
• Bae DK

• KMID: 2438114
• DOI: http://doi.org/10.5792/ksrr.18.020

Abstract

PURPOSE
The purposes of this study were to compare clinical results after total knee arthroplasty (TKA) using the Attune and PFC Sigma knee designs and to investigate whether the use of the Attune prosthesis increased the risk of patellar injury in Asian patients.
MATERIALS AND METHODS
Three hundred knees that underwent TKA using Attune (group A) were compared to 300 knees that underwent TKA using PFC Sigma (group B). The Knee Society Knee Score (KS) and Function Score (FS), and range of motion (ROM) were compared. The residual patellar thickness was compared to evaluate the risk of patellar injury.
RESULTS
The postoperative KS and ROM of group A were better than those of group B (93.1 vs. 88.8, p < 0.001 and 131.4° vs. 129.0°, p=0.008, respectively). The postoperative FS did not differ significantly between the two groups (80.9 vs. 78.7, p=0.427). The residual patella was thinner in group A (14.8 mm vs. 15.7 mm, p=0.003), which made up a higher proportion of the high-risk group for patellar fractures with a residual thickness of < 12 mm (7.5% vs. 2.1%, p=0.003).
CONCLUSIONS
TKA using the Attune prosthesis provided more favorable clinical results than TKA using PFC Sigma. However, the risk of injury in the residual patella was increased with use of the Attune prosthesis in Asian patients.

Keyword

Knee; Arthroplasty; Patella; Injury; Risk

MeSH Terms

Arthroplasty
Arthroplasty, Replacement, Knee
Asian Continental Ancestry Group
Humans
Knee*
Patella
Prostheses and Implants
Range of Motion, Articular