Fig. 1.

Radiographic measurements. Cervical lordosis was measured in neutral position between C2 lower endplate and C7 lower endplate using Cobb technique (a). Operated segmental height was measured along the line passing through the centre of the vertebral bodies above and below the segments to be operated (b). Length of segment f = h and i = j. C2-7 ROM (between C2 lower endplate and C7 lower endplate) (c_f-c_e), operated segmental ROM (between upper endplate of cranial vertebral body and lower endplate of caudal vertebral body at operated segment) (d_f-d_e), upper segmental ROM (between lower endplate and upper endplate of upper adjacent segment disc) (e_f-e_e) and lower segmental ROM (between lower endplate and upper endplate of lower adjacent segment) (g_f-g_e) were measured on dynamic lateral radiographs using the Cobb technique