After 48 months of clinical service , 21 restorations in 16 patients ( 9 luted with Definite , 12 with Variolink ; 2 placed by operator A and 19 by operator B ) had to be replaced due to inlay fracture ( n = 11 ) , tooth fracture ( n = 4 ) , hypersensitivities ( n = 3 ) , or marginal gap formation ( n = 3 ) .
