Publication:

Comparative study of early functional outcome between cruciate retaining knee and 3D knee: who is more satisfied?

Background With growing demand on quality of life, there is drastic increase in total knee arthroplasty (TKA) surgeries and accordingly there is increase in research on TKA design to get the best possible outcome. Commonly known TKA designs are PCL substituting or retaining, fixed bearing or mobile bearing. Now the scientific research shifted to center of rotation of angulation (CORA) of knee i.e. medial or lateral pivot. 3D knee is based on lateral pivot system and designed to match the natural knee. The purpose of this study is to compare 3D knee with cruciate retaining (CR) knee functionally and also to assess the patient’s level of satisfaction.

Methods 20 patients each included in 3D knee and CR knee group from June 2016 to June 2018 who satisfied the inclusion and exclusion criteria. Patients were followed up for 1 year. Their functional outcome assessed using knee society score (KSS) part 1 and 2. Also patient’s knee range of motion documented separately.

Results Postoperatively there is improvement in knee society score in both the groups. 3D knee showed significant better KSS score than CR knee groups in first 3 months but as the patients followed up for 1 year both groups reached similar KSS score and also similar knee range of motion.

Conclusions 3D knee showed satisfactory outcome when compared with CR knee and definitely provides a step ahead in search of natural knee.