“…The studies included in the review varied with the type of conduction, material compared and form of applied material. Type of conduction: in vivo [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 14 , 15 , 16 , 17 , 18 , 20 , 21 , 22 , 23 , 25 , 26 , 27 , 28 , 64 , 65 , 66 ] or in vitro [ 19 , 24 , 29 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 ], type of surgery, and whether there was a material compared [ 3 , 6 , 8 , 9 , 10 , 11 , 13 , 14 , 15 , 16 , 18 , 21 , 24 , 26 , 27 , 28 ,…”