When undertaking specific mandibular surgeries—such as sagittal split ramus osteotomy (SSRO) and intraoral vertical ramus osteotomy (IVRO)—the lingula provides an essential reference point. This research was designed to map lingula location along horizontal and vertical planes relative to four distinct ramus morphologies. A total of ninety subjects—60 female, 30 male—had cone beam computed tomography images reviewed to quantify the lingula tip (Li) in reference to the anterior border (AB), posterior border (PB), sigmoid notch (SN), and inferior border (IB) of the ramus. Proportional placement of Li on both axes was denoted by the indices Li–AB/AB–PB and Li–SN/SN–IB. Four lingula categories were recognized: triangular, truncated, nodular, and assimilated. Statistical testing was applied to evaluate measurement discrepancies across the four morphological groups and between the two sexes. On average, the Li–AB span measured 18.88 mm, a distance that proved substantially larger for the truncated configuration than for each of the other three variants. The Li–PB dimension averaged 15.23 mm, with no statistically significant difference among the four shapes. The computed Li–AB/AB–PB proportion reached 55.3% overall. For the truncated form, this value was 57.2%, significantly higher than the nodular form (54%) and the assimilated form (50.4%). The Li–SN distance averaged 19.95 mm, while Li–IB stood at 31.34 mm. Across the four lingula types, neither of these two measures varied significantly. The Li–SN/SN–IB ratio averaged 38.5%. Comparing the sexes revealed no significant differences in measurements. Substantial positional variation was evident among the four lingula forms, with Li situated superoposteriorly relative to the ramus midpoint. Acknowledging lingula shape heterogeneity is therefore imperative for the safe execution of ramal SSRO and IVRO interventions.
