Component Alignment in Total Knee Replacement

Total knee replacement (TKR) is one of the most commonly performed surgical intervention providing substantial relief from pain and improvement in functional disability in patients with knee arthritis [1]. Although the survival of primary TKR s is excellent with 95% of survival at 10 years for most implants [2], approximately 20% of those who undergo TKR are not satisfied with the outcome at the end of one year assessment [3]. Restoration of knee alignment is one of the main determinants of successful outcomes after TKR [4]. Implant malalignment following primary TKA has been reported to be the primary reason for revision in 7% of revised TKR [5].