BACKGROUND Radiologic adjacent segment degeneration(ASDeg)can occur after spinal surgery.Adjacent segment disease(ASDis)is defined as the development of new clinical symptoms corresponding to radiographic changes adja...BACKGROUND Radiologic adjacent segment degeneration(ASDeg)can occur after spinal surgery.Adjacent segment disease(ASDis)is defined as the development of new clinical symptoms corresponding to radiographic changes adjacent to the level of previous spinal surgery.Greater pre-existing ASDeg is generally considered to result in more severe ASDis;nonetheless,whether the ASDeg status before index surgery influences the postoperative risk of revision surgery due to ASDis warrants investigation.AIM To identify possible risk factors for ASDis and verify the concept that greater preexisting ASDeg leads to more severe ASDis.METHODS Data from 212 patients who underwent posterior decompression with Dynesys stabilization from January 2006 to June 2016 were retrospectively analyzed.Patients who underwent surgery for ASDis were categorized as group A(n=13),whereas those who did not were classified as group B(n=199).Survival analysis and Cox proportional hazards models were used to compare the modified Pfirrmann grade,University of California-Los Angeles grade,body mass index,number of Dynesys-instrumented levels,and age.RESULTS The mean time of reoperation was 7.22(1.65–11.84)years in group A,and the mean follow-up period was 6.09(0.10–12.76)years in group B.No significant difference in reoperation risk was observed:Modified Pfirrmann grade 3 vs 4(P=0.53)or 4 vs 5(P=0.46)for the upper adjacent disc,University of California-Los Angeles grade 2 vs 3 for the upper adjacent segment(P=0.66),age of<60 vs>60 years(P=0.9),body mass index<25 vs>25 kg/m2(P=0.3),and sex(P=0.8).CONCLUSION Greater preexisting upper ASDeg was not associated with a higher rate of reoperation for ASDis after Dynesys surgery.Being overweight tended to increase reoperation risk after Dynesys surgery for ASDis.展开更多
目的探讨Bioflex系统治疗腰椎椎间盘退行性疾病的临床疗效。方法2007年3月～2009年4月，行椎管减压、椎间融合（视椎间盘退变程度而定）联合Bioflex系统治疗腰椎椎间盘退行性疾病患者19例。记录视觉模拟评分（visual analog scale，VAS...目的探讨Bioflex系统治疗腰椎椎间盘退行性疾病的临床疗效。方法2007年3月～2009年4月，行椎管减压、椎间融合（视椎间盘退变程度而定）联合Bioflex系统治疗腰椎椎间盘退行性疾病患者19例。记录视觉模拟评分（visual analog scale，VAS）、Oswestry功能障碍指数（Oswestry disability index，ODI）、节段活动范围（range of motion，ROM）及融合情况。结果患者均获随访，随访时间为9—25个月，平均16．8个月。术后及末次随访时患者VAS、ODI评分明显改善，与术前相比差异有统计学意义（P〈0．05）。术后和末次随访时非融合节段ROM明显减低，与术前相比差异有统计学意义（P〈0．05）；邻近节段ROM略有增加，与术前相比差异无统计学意义（P〉0．05）。融合节段的融合率为91．6％。结论使用Bioflex系统治疗腰椎椎间盘退行性疾病是一种安全、有效的新方法，它能够在提供稳定的力学环境的同时，在一定程度上保留手术节段的活动度，有利于缓解椎间盘退变，可能避免刚性内固定引起的邻近椎间盘退变。展开更多
基金The study was approved by our institutional review board,Research Ethics Committee China Medical University and Hospital,Taichung,Taiwan(Protocol No.:CMUH108-REC2-133).
文摘BACKGROUND Radiologic adjacent segment degeneration(ASDeg)can occur after spinal surgery.Adjacent segment disease(ASDis)is defined as the development of new clinical symptoms corresponding to radiographic changes adjacent to the level of previous spinal surgery.Greater pre-existing ASDeg is generally considered to result in more severe ASDis;nonetheless,whether the ASDeg status before index surgery influences the postoperative risk of revision surgery due to ASDis warrants investigation.AIM To identify possible risk factors for ASDis and verify the concept that greater preexisting ASDeg leads to more severe ASDis.METHODS Data from 212 patients who underwent posterior decompression with Dynesys stabilization from January 2006 to June 2016 were retrospectively analyzed.Patients who underwent surgery for ASDis were categorized as group A(n=13),whereas those who did not were classified as group B(n=199).Survival analysis and Cox proportional hazards models were used to compare the modified Pfirrmann grade,University of California-Los Angeles grade,body mass index,number of Dynesys-instrumented levels,and age.RESULTS The mean time of reoperation was 7.22(1.65–11.84)years in group A,and the mean follow-up period was 6.09(0.10–12.76)years in group B.No significant difference in reoperation risk was observed:Modified Pfirrmann grade 3 vs 4(P=0.53)or 4 vs 5(P=0.46)for the upper adjacent disc,University of California-Los Angeles grade 2 vs 3 for the upper adjacent segment(P=0.66),age of<60 vs>60 years(P=0.9),body mass index<25 vs>25 kg/m2(P=0.3),and sex(P=0.8).CONCLUSION Greater preexisting upper ASDeg was not associated with a higher rate of reoperation for ASDis after Dynesys surgery.Being overweight tended to increase reoperation risk after Dynesys surgery for ASDis.
文摘目的探讨Bioflex系统治疗腰椎椎间盘退行性疾病的临床疗效。方法2007年3月～2009年4月，行椎管减压、椎间融合（视椎间盘退变程度而定）联合Bioflex系统治疗腰椎椎间盘退行性疾病患者19例。记录视觉模拟评分（visual analog scale，VAS）、Oswestry功能障碍指数（Oswestry disability index，ODI）、节段活动范围（range of motion，ROM）及融合情况。结果患者均获随访，随访时间为9—25个月，平均16．8个月。术后及末次随访时患者VAS、ODI评分明显改善，与术前相比差异有统计学意义（P〈0．05）。术后和末次随访时非融合节段ROM明显减低，与术前相比差异有统计学意义（P〈0．05）；邻近节段ROM略有增加，与术前相比差异无统计学意义（P〉0．05）。融合节段的融合率为91．6％。结论使用Bioflex系统治疗腰椎椎间盘退行性疾病是一种安全、有效的新方法，它能够在提供稳定的力学环境的同时，在一定程度上保留手术节段的活动度，有利于缓解椎间盘退变，可能避免刚性内固定引起的邻近椎间盘退变。
