“…There are also some reports indicating that the flexion angle could be optimized by the development of TKA components through thickening posterior femoral condyle (Lee et al, 2011;Kim et al, 2016;Yang et al, 2016;Darmanto et al, 2022a), creating a single radius system (Shimizu et al, 2014;Jin et al, 2020;Darmanto et al, 2021;Clary et al, 2013), creating a medial pivot system (Samy et al, 2018;Kim et al, 2017b;French et al, 2020;Carvalho Júnior et al, 2017;Darmanto et al, 2022b), setting up posterior tibial slope (Shi et al, 2013;Darmanto et al, 2022a;Hohmann and Bryant, 2007;Fujito et al, 2018;Massin and Gournay, 2006), and creating a postcam stabilizer mechanism (Ohno et al, 2016;Kosse et al, 2020;Yagishita et al, 2012), (Sanz-Ruiz et al, 2016;Seon et al, 2011;Tamaki et al, 2013). In the market, each prolific company has its characteristic in the development of TKA components.…”