Clinical and radiographic outcomes of computer-navigated total knee arthroplasty are not adversely affected by body mass index

Ken Lee Puah; William Yeo; Mann Hong Tan

doi:10.1016/j.jor.2019.11.002

Clinical and radiographic outcomes of computer-navigated total knee arthroplasty are not adversely affected by body mass index

J Orthop. 2019 Nov 12:19:54-58. doi: 10.1016/j.jor.2019.11.002. eCollection 2020 May-Jun.

Authors

Ken Lee Puah¹, William Yeo¹, Mann Hong Tan¹

Affiliation

¹ Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.

Abstract

Aim: To study the effect of obesity on clinical and radiographic outcomes of computer-navigated knee arthroplasty.

Materials and methods: 117 patients underwent primary computer-navigated total knee arthroplasty. Eight were lost to follow-up and 8 had incomplete data.

Results: Eighty-four (83.2%) female, 17 (16.8%) male patients age 65.3 ± 6.9 years with a pre-operative BMI 27.2 ± 4.1 (18.6-40.0) kg/m², 7.3 ± 0.98 years follow-up. Forty-two (41.6%) had a BMI>27.5 kg/m² indicative of obesity in Singapore. Post-operative radiographic alignment, 2-year Oxford knee scores and ROM were not significantly associated with BMI.

Conclusion: BMI is not a determinant of functional scores when computer navigation is used.

Keywords: Computer navigation; Knee arthroplasty; Obesity.