Abstract
INTRODUCTION
Patellofemoral compilcations are among the most frequently observed adverse events after total knee arthroplasty. The posterior location with Femoral component of conventional TKA in AP alignment cause paradoxical movement, but, guide motion TKA (Journey.2.BCS) with anterior post-cam remain a correct AP alignment. The purpose of this study was to investigate patellofemoral (PF) contact stress between Bi-Cruciate Substituting TKA (Journey.2.BCS) and CR TKA (Journey.CR).
METHODS
We evaluated 22 knees with medial compartment osteoarthritis who underwent. Simultaneous bilateral TKA. The prospective randomized study was to measure intraoperative PF contact stress by a patellofemoral sensor (Kyowa Co., Ltd., Tokyo, Japan) comparing the identical Bi-Cruciate Substituting or CR Journey.2 total knee prostheses implanted bilaterally in the same patient.
RESULTS
The PF contact stress showed significantly greater at CR TKA than at BCS TKA in 120 and 140 degrees of flextion (p=0.04, p=0.018). and showed no significant correlations with postoperative flextion angles.
DISCUSSION AND CONCLUSION
In guide motion TKA, CR prosthesis increases PF contact stress than Bi-Cruciate Substituting prosthesis. The femoral rollback with medial pivot motion at CR TKA decreases more as the BCS TKA. Increased PF contact stress in guided motion TKA is not necessarily decrease postoperative flextion angle.
