Wu TK, Liu H, Ding C, et al. - This study was undertaken to evaluate the impact of a preoperative segmental range of motion on patient outcomes in cervical disc arthroplasty. Researchers conducted a retrospective study including patients who had undergone cervical disc arthroplasty (CDA) between January 2008 and October 2018 applying Prestige-LP discs in our hospital. They were divided into the small-range of motion (ROM) (≤ 5.5°) and the large-ROM (> 12.5°) groups according to preoperatively index-level ROM. They assessed clinical outcomes, including the Japanese Orthopedics Association, Neck Disability Index, and Visual Analogue Scale scores. They assessed radiological parameters, including cervical lordosis, disc angle, global and segmental ROM, disc height, and complications. This study enrolled a total of 126 individuals, with a total of 132 arthroplasty segments. The findings suggested that individuals with preoperatively limited segmental ROM had severe HO, and achieved similar postoperative clinical outcomes as patients with preoperatively excessive segmental ROM. It was reported that individuals with preoperatively limited segmental ROM exhibited a postoperative increase in segmental mobility, which reduced in individuals with preoperatively excessive segmental ROM.