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Lumbar disc rehydration in the bridged segment using the BioFlex dynamic stabilization system: A case report and literature review

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World Journal of Clinical Cases 2020年第10期8卷 1958-1965页

作者： Yong-Chao Li Xiao-Fei Feng Xiao-Dong Pang Jun Tan Bao-Gan Peng Department of Spinal Surgery The Third Medical Center of PLA General HospitalBeijing 100039China Department of Spinal Surgery Shanghai East HospitalTongji University School of MedicineShanghai 200120China Department of Orthopedics Pinghu Second People’s HospitalPinghu 314201Zhejiang ProvinceChina

BACKGROUND In recent years,the mechanical concept of intervertebral disc regeneration has become more and more popular due to the increasing awareness of the importance of preservation of spine movement.Interestingly,there is increasing evidence,however,that dynamic stabilization systems may compensate nonphysiological loads,limit pathological movement,normalize disc height and intradiscal pressure,and provide an adaptive environment for disc regeneration.CASE SUMMARY The patient was a 54-year-old man,who presented with a 10-year history of mechanical back pain,which had become progressively serious and radiated into the left lower limb with numbness 3 mo prior.He had decreased muscle strength(class IV)of the left dorsal extensor and plantar flexor.Magnetic resonance imaging scans showed L3-S1 disc degeneration and L4-L5 disc herniation.Because the patient did not respond to various conservative treatments,he underwent a posterior L4-5 discectomy with fixation of the BioFlex dynamic stabilization system(Bio-Spine,Seoul,Korea).Preoperative symptoms were relieved and lumbar function was markedly improved after the operation.L4-L5 disc rehydration of instrumented segment was noted on magnetic resonance imaging at the 2-year follow-up.CONCLUSION Rehydration of the degenerated disc in our patient indicates that the BioFlex dynamic stabilization system may promote disc regeneration.Further research is needed to provide more evidence to support lumbar disc rehydration in the bridged segment using this system.

关键词： Disc regeneration dynamic stabilization system Degenerative disc disease Magnetic resonance imaging BioFlex Case report

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Is Dynesys dynamic stabilization system superior to posterior lumbar fusion in the treatment of lumbar degenerative diseases?

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World Journal of Clinical Cases 2020年第22期8卷 5496-5500页

作者： Bao-Gan Peng Chun-Hua Gao Department of Spinal Surgery The Third Medical CenterPeople’s Liberation Army General HospitalBeijing 100039China

Dynesys,a pedicle-based dynamic stabilization system,was introduced to overcome some undesirable complications of fusion procedures.Nevertheless,the theoretical advantages of Dynesys over fusion have not been clearly confirmed.The purpose of this editorial was to compare clinical and radiological outcomes of patients who underwent Dynesys system with those who underwent posterior lumbar fusion according to the existing literature and to see if the application of the Dynesys system is superior to the traditional lumbar fusion surgery.According to published clinical reports,the short-term effects of the Dynesys dynamic stabilization system are similar to that of traditional lumbar fusion surgery.Three comparative studies of Dynesys dynamic stabilization and fusion surgery with medium-term follow-up are encouraging.However,the results from four single-treatment-arm and small-sample studies of case series with long-term follow-up were not encouraging.In the present circumstances,it is not possible to conclude that the Dynesys dynamic stabilization system is superior to fusion surgery for lumbar degenerative diseases.

关键词： dynamic stabilization system Lumbar fusion Lumbar degenerative diseases Complication

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