| Early Clinical Results after Bryan Cervical Artificial Disc Replacement |
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Yong-Woo Lee, M.D., Young-Sun Chung, M.D., Jung-Yong Ahn, M.D., Ryoong-Huh, M.D., Sang-Sup Chung, M.D. |
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Department of Neurosurgery, Pochon CHA University College of Medicine, Seongnam, Korea |
| Early Clinical Results after Bryan Cervical Artificial Disc Replacement |
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Yong-Woo Lee, M.D., Young-Sun Chung, M.D., Jung-Yong Ahn, M.D., Ryoong-Huh, M.D., Sang-Sup Chung, M.D. |
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| Abstract |
Objective: The purpose of this study is to evaluate whether intervertebral cervical disc prosthesis can provide relief of objective neurological symptoms and signs and provide motion preservation. This study is also investigated to know whether early complications associated with implantation of prosthesis occur or not.
Methods: From July 2004 to January 2005, a total of ten Bryan cervical prostheses were implanted in nine patients. The authors retrospectively reviewed clinical and radiographic outcomes in all patients who received the Bryan cervical prosthesis replacement. The patients underwent preoperative and multiple postoperative assessments(4 weeks, 3 months and 6 months). According to the Visual Analogue Scale(VAS) and modified Odom's criteria, preoperative symptoms and disability scores were significantly improved in 6 months in all patients.
Results: Among 9 patients, there were 5 males and 4 females. Age ranged from 34 to 55 years with an average age of 45.2 years. Overall, 8 single-level procedures and 1 two-level implantation were performed. The preoperative VAS averaged 7±0.7, and the postoperative VAS averaged 1.1±0.9 at 6 months. At the 4 week postoperative follow-up, three patients were rated as good according to modified Odom's criteria. At 3 and 6 months after operation, the scores were rated as excellent or good for all patients who had been followed. The measured mean range of motion (ROM) for patients at 4 weeks, 3 months and 6 months after operation was 2.3±0.8, 4.6±1.5 and 6.6±1.2, respectively.
Conclusion: Bryan cervical artificial disc replacement can alleviate neurological symptoms with efficacy while preserving normal neck motion for a 6 month period. Even though clinical improvement and stability of the prosthesis were obtained for 6 months, long-term follow-up studies will be necessary to assess the prolonged safety and stability of the devices. |
| Keywords:
Bryan cervical artificial disc.Cervical spondylosis.Early results |
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