“…After reading the 70 articles selected, 39 were excluded for reasons listed in Figure 1 . The remaining 31 studies were screened for data on medical, clinical, and radiographic factors [ 5 , 7 , 8 , 9 , 10 , 11 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ].…”