The average self-reported wear rate in the FPS group in months 1 , 2 , and 3 were 94.9 % ( 13 patients ; 93.1 % to 98.7 % ) , 95.6 % ( 10 patients ; 92.3 % to 99.4 % ) , and 94.8 % ( 11 patients ; 82.8 % to 99.6 % ) , respectively .