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Sagittal alignment comparison of Bryan disc arthroplasty with ProDisc-C arthroplasty: a prospective, randomized controlled clinical trial

STUDY DESIGN: A prospective, randomized study of the radiographic outcomes in patients undergoing single-level cervical arthroplasty with Bryan disc and ProDisc-C prosthesis. OBJECTIVE: The purpose of this trial was to compare the alignment changes of Bryan disc arthroplasty (modified techniques) with ProDisc-C arthroplasty. SUMMARY OF BACKGROUND DATA: Aggravation of kyphosis is the known challenge after Bryan disc arthroplasty. Both Bryan disc arthroplasty with modified techniques and ProDisc-C arthroplasty were reported to avoid the postoperative local kyphosis. There have been no studies comparing the alignment changes after Bryan disc arthroplasty with ProDisc-C arthroplasty. METHODS: We conducted a randomized controlled clinical trial enrolling patients with cervical disc disease. Ultimately 20 patients received Bryan disc arthroplasty with modified surgical techniques and 26 patients received ProDisc-C arthroplasty. Functional spinal unit (FSU) and overall cervical alignment (Cobb angle of C2/7) were compared at final follow-up. RESULTS: (1) FSU angle: the FSU angle was maintained for the Bryan disc group (from 0.8 to 0.6 degrees) without statistical significance; the FSU angle increased 2.9 degrees for the ProDisc-C group (from -0.3 to 2.6 degrees) with statistical significance. (2) Overall alignment: the overall alignments did not change for both Bryan disc and ProDisc-C groups. CONCLUSIONS: Bryan disc arthroplasty with modified techniques can maintain the lordosis of FSU, whereas ProDisc-C arthroplasty can restore the lordosis of FSU. For the patients with preoperative FSU kyphosis, ProDisc-C arthroplasty may be a better choice to restore the lordosis

Keywords : Adult,Arthroplasty,Cervical Vertebrae,China,diagnostic imaging,Diskectomy,Female,Humans,Intervertebral Disc,Kyphosis,Lordosis,Male,methods,Middle Aged,Patients,Prospective Studies,Radiculopathy,Radiography,Spondylosis,surgery,Total Disc Replacement,Treatment Outcome,, Alignment,Comparison,Bryan,Disc, shoulder injection

Date of Publication : 2011 Aug

Authors : Yanbin Z;Yu S;Zhongqiang C;Zhongjun L;

Organisation : Department of Orthopedic Surgery, Peking University Third Hospital, Beijing, China

Journal of Publication : J Spinal Disord Tech

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/21150665

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Sagittal Alignment Comparison of Bryan Disc Arthroplasty With ProDisc-C Arthroplasty A Prospective, Randomized Controlled Clinical Trial | Artificial Disc Replacement | Spine Center in Portland Oregon | OHSU

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