• Chang Hyun Oh, KimDo YeonDYDepartment of Neurosurgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea., JiGyu YeulGYDepartment of Neurosurgery, Yonsei University College of Medicine, Seoul, Korea., Yeo Ju Kim, Seung Hwan Yoon, Dongkeun Hyun, Eun Young Kim, Hyeonseon Park, and Hyeong-Chun Park.
• Department of Neurosurgery, Guro Teun Teun Hospital, Seoul, Korea.
• Yonsei Med. J. 2014 Jul 1; 55 (4): 1072-9.

PurposeClinical outcomes and radiologic results after cervical arthroplasty have been reported in many articles, yet relatively few studies after cervical arthroplasty have been conducted in severe degenerative cervical disc disease.Materials And MethodsSixty patients who underwent cervical arthroplasty (Mobi-C®) between April 2006 and November 2011 with a minimum follow-up of 18 months were enrolled in this study. Patients were divided into two groups according to Pfirrmann classification on preoperative cervical MR images: group A (Pfirrmann disc grade III, n=38) and group B (Pfirrmann disc grades IV or V, n=22). Visual analogue scale (VAS) scores of neck and arm pain, modified Oswestry Disability Index (mODI) score, and radiological results including cervical range of motion (ROM) were assessed before and after surgery.ResultsVAS and mean mODI scores decreased after surgery from 5.1 and 57.6 to 2.7 and 31.5 in group A and from 6.1 and 59.9 to 3.7 and 38.4 in group B, respectively. In both groups, VAS and mODI scores significantly improved postoperatively (p<0.001), although no significant intergroup differences were found. Also, cervical dynamic ROM was preserved or gradually improved up to 18 months after cervical arthroplasty in both groups. Global, segmental and adjacent ROM was similar for both groups during follow-up. No cases of device subsidence or extrusion were recorded.ConclusionClinical and radiological results following cervical arthroplasty in patients with severe degenerative cervical disc disease were no different from those in patients with mild degenerative cervical disc disease after 18 months of follow-up.

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