Figure 2
From: A retrospective analysis of trends in primary knee arthroplasty in Germany from 2008 to 2018

(a) All performed regular total knee arthroplasty procedures from 2008 to 2018. (b) All performed partial knee arthroplasty procedures from 2008 to 2018. (c) All performed semi-constrained and constrained total knee arthroplasty procedures from 2008 to 2018 (black = semi-constrained; grey = constrained).