Influence factors of segmental range of motion after cervical artificial disc replacement
Wang Han;Tian Wei;Department of Spine Surgery,Beijing Jishuitan Hospital;
Objective To investigate influence factors of segmental range of motion after cervical artificial disc replacement. Methods Data of 57 patients( 68 prostheses) with cervical disc herniation or degenerative cervical spinal canal stenosis( spinal cord or mixed type) treated in Beijing Jishuitan Hospital from March 2004 to April 2007 were retrospectively analyzed in this study. Follow-up time was longer than7 years. Before surgery,3 months after surgery and at the final follow-up time,clinical effect evaluation and imaging assessments were analyzed respectively. After screening out the factors that may cause the loss of segmental range of motion,the binary Logistic regression analysis was performed. Thus,the key factors affecting the loss of segmental range of motion were screened out. Results At the final follow-up time,57 patients were obtained satisfactory clinical results. The mean segmental range of motion at final followup time( 7. 8 °) had no difference with the data before surgery( 8. 8 °). Binary Logistic regression analysis showed that,the prosthesis range of motion would decrease if the patient has a lower range of motion before surgery( 7 °),an older age( 55 years),a larger disc insertion angle( -2 ° or 2 °)or an in-appropriate disc insertion depth( -3. 4 mm or 3. 4 mm). Other factors had no significant contribution. Conclusion The long-term clinical effect of cervical arthroplasty is satisfactory,and the segmental mobility of replacement is preserved. The range of motion after surgery will be affected by preoperative mobility,age of patient and surgical techniques.
【CateGory Index】： R687.3