Author Preoperative radiograph used
Smith [21] OPG
Xu et al. [22] OPG + CBCT
Kim et al. [24] OPG
Neves et al. [33] MDCT
Nakayama et al. [35] OPG + CT
Hesagawa et al. [36] OPG + CT
Ghaminia et al. [43] OPG + CT
Bhat and Cariappa [44] Not indicated
Jerjes et al. [47] OPG
Kjolle et al. [48] OPG
Guerruani et al. [49] OPG
Landi et al. [50] OPG + CT + Periapical
Wang et al. [52] OPG + CT
Dolanmaz et al. [56] OPG

OPG = orthopantomography;
CT = computed tomography;
CBCT = cone-beam computed tomography;
MDCT = multi-detector computed tomography.