Mid-term efficacy and complications of Wallis interspinous dynamic stabilization system for the treatment of lumbar degenerative diseases
GU Honglin
ZHAN Shiqiang
CHANG Yunbing
ZENG Shixing
LIANG Changxiang
LIU Bin
WANG Yisheng
ZHENG Qiujian
ZENG Hui
Abstract：Objective To summarize and analyze the mid-term efficacy and complications of Wallis interspinous dynamic stabilization system for lumbar degenerative diseases (LDD). Methods From July 2008 to March 2013, 130 patients with LDD were treated by Wallis interspinous implants in Guangdong General Hospital, and clinical data of the patients were analyzed retrospectively. Symptoms were assessed by visual analogue scale (VAS), lumbar functions were evaluated according to Japanese Orthopaedic Association (JOA) score and Oswestry disability index (ODI); The disc height (DH) and range of motion (ROM) of the operated segments were determined by lumbar plane and dynamic X-ray to assess the biomechanical changes before and after the operation; Intraoperative and postoperative complications were observed and then the causes were analyzed. Results There were 127 cases had completed the follow-up and the average time was 38.4 months (13-58 months). At the final follow-up, VAS, JOA and ODI scores were better than preoperative ones (P<0.05);DH of the operated segments was (11.3 ± 1.8) cm which had no significant difference when comparing with preoperative DH [(11.4 ± 1.8) cm] (P >0.05), while ROM was less than preoperative one [(22.0 ± 10.0)° vs (25.5 ± 10.1)°, P<0.05]. The complication rate was 4.7% (6/127), in which 1 case with spacer breakage during the operation, 2 cases with disc herniation recurrence at operated segment and adjacent segment respectively, 2 cases with infections (1 case in superficial and 1 case in deep infection), and 1 case with continuous low back pain. Conclusion The application of Wallis interspinous dynamic stabilization system for LDD could achieve definite mid-term effects and safety, but proper indications should be evaluated strictly due to its potential risk of complications.
Keywords：Lumbar vertebraeDegenerative diseaseDynamic stabilization devicesIntraoperative complicationsPostoperative complicationsIndication
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 203-209 )