The accuracy of component alignment in custom cutting blocks compared with conventional total knee arthroplasty instrumentation: prospective control trial.

Background: The purpose of this study was to assess whether custom cutting blocks improve accuracy of component alignment compared to conventional TKA instrumentation.

Methods: Eighty primary TKA patients were enrolled in an open-label randomized prospective clinical trial and were divided into two groups, 40 custom cutting blocks and 40 conventional TKA instrumentations. The primary outcome was prosthetic alignment with respect to mechanical axis and epicondylar axis.

A comparison of accuracy between step and non-step reamers of femoral intramedullary alignment system in total knee arthroplasty evaluated by computer-assisted navigation.

Limb alignment after total knee replacement has been demonstrated to be one of the most influential in determining long-term survival of the implants. Malalignment can contribute to early prosthesis failure through point loading and premature polyethelene wear. Alignment guides have been developed to improve the accuracy of femoral and tibial cuts during surgery.