“…The included studies investigated the techniques of both micromechanical and chemical bonding of ceramics to dental hard tissues. Among the methods applied to achieve micromechanical bonding, there were different kinds of mechanical treatments such as APA [ 7 , 16 , 17 , 18 , 20 , 21 , 23 , 26 , 27 , 28 , 29 , 30 , 31 , 33 ], tribochemical silica coating [ 7 , 16 , 17 , 19 , 21 , 22 , 23 , 24 , 26 , 30 , 33 ], laser irradiation [ 26 , 27 , 28 ], and wet hand grinding [ 16 ]. The second approach utilized for micromechanical bonding was a chemical-based one which involved the use of various acid solutions to etch the conditioned surface [ 7 , 16 , 17 , 20 , 22 , 25 , 27 , 28 , 30 , 31 , 32 , 33 ].…”