“…Later, long-term surveys demonstrated, however, a marked tendency to develop severe synovitis and cyst formation caused by silicone particles destroying the joint (Kaarela et al, 1998; Kato et al, 1986; Schuind et al, 2008; Viljakka et al, 1987; Viljakka et al, 1995), and SLA was abandoned several years ago. Today, other methods of operative treatment have been adopted (Allan et al, 2001; Backaert et al, 1985; Mariconda et al, 2013; Ueba et al, 1999; Werber et al, 2013; Yajima et al, 2004; Zeplin and Ziegler, 2013). We found 20 years ago that in certain circumstances, silicone cyst formation had not developed even 20 years after SLA (Viljakka et al, 1995).…”