Custom cutting guides in total knee arthroplasty
The role of custom cutting guides (CCG), also known as patient-specific instrumentation, in total knee arthroplasty (TKA) remains controversial. Originally, this technique potentially offered many benefits including: more accurate alignment, less surgical time, and reduced costs. It was hoped that this would translate into better outcomes and longer implant survivorship. In assessing the overall literature, some studies describe improved component positioning (fewer outliers) over manual alignment techniques (1-3). However, studies have demonstrated mixed results for all of the above mentioned parameters (4-6). Therefore, the role of patient-specific instrumentation remains unclear.