19 Harley St, London, W1G 9QJ, UK

[Biomechanical study of interspinous fixational effect on the stiffness of adjacent segments]

OBJECTIVE: To discuss the effect of interspinous fixation (Wallis) on the stiffness of adjacent segments by biomechanical measurements. METHODS: The surgical segments of all 23 patients were L4/5 lumbar disc herniation with or without lumbar stenosis. Thirteen patients (experimental group) underwent interspinous (Wallis) fixation, and ten patients (control group) underwent PLIF. L3/4 and L5/S1 segmental stiffness and displacement were measured by a spine stiffness gauge (SSG) device during surgery when the vertebral plate was exposed or during spinal decompression or internal fixation. RESULTS: Stiffness of adjacent segments L3/4 and L5/S1 showed no significant difference between the L4/5 segment decompression and the exposure of the vertebral plate. After interspinous (Wallis) fixation of L4/5, the stiffness of the cephalad adjacent segment L3/4 was (45.8 +/- 10.7) N/mm, which was 20.5% more than that after exposure of the vertebral plate (P=0.025); After L4/5 PLIF, the stiffness of L3/4 was (35.3 +/- 10.7) N/mm and was decreased by 12.4% less than that after exposure of the vertebral plate (P=0.033). The stiffness of the cephalad adjacent segment L3/4 after fixation in the Wallis group was significantly higher than that of the PLIF group (P=0.037). CONCLUSION: After interspinous (Wallis) fixation, the stiffness and the stability of the cephalad adjacent segment increased. The interspinous fixation system (Wallis) has a protective effect on cephalad adjacent segments

Keywords : Adult,Biomechanical Phenomena,China,complications,Decompression,Female,Humans,Internal Fixators,Intervertebral Disc,Intervertebral Disc Displacement,Lumbar Vertebrae,Male,methods,Middle Aged,Orthopedic Procedures,Orthopedics,Patients,physiology,physiopathology,Prospective Studies,Range of Motion,Articular,Spinal Fusion,Spinal Stenosis,Spine,surgery,Universities,, Study,Interspinous,Fixational,Effect, vulvodynia cure

Date of Publication : 2011 Oct 18

Authors : Li CD;Sun HL;Yu ZR;

Organisation : Department of Orthopedics, Peking University First Hospital, Beijing 100034, China. lichunde@medmail.com.cn

Journal of Publication : Beijing Da Xue Xue Bao Yi Xue Ban

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/22008670

The London Spine Unit : Harley Street UK. Specialists in Cutting Edge Technologies for Spinal Surgery

Make an Appointment 

Trustpilot Reviews
Doctify Reviews
Top Doctor Reviews

Biomechanical study of interspinous fixational effect on the stiffness of adjacent segments | Sciatica massage london

What our patients say ...

Consultant Spine Surgeon
Consultant Spine Surgeon
Consultant Spine Surgeon

This surgical technique consists of a percutaneous approach for the treatment of small to medium size hernias of the intervertebral disc by laser energy. The main objective is to reduce the intradiscal pressure in the nucleus pulposus

Laser Disc Surgery can be performed under local anaesthetic as a day case at our centre on the prestigious Harley Street.
What is London spine unit and How it Works

The London Spine Unit was established in 2005 and has successfully treated over 5000 patients. All conditions are treated.

treatment of all spinal disorders

The London Spine Unit specialises in Minimally Invasive Treatments allowing rapid recovery and return to normal function

Trusted by patients worldwide

The London Spine Unit provides the highest quality care to all patients and has VIP services for those seeking exceptional services

If you have any emergency Doctor’s need, simply call our 24 hour emergency

Your personal case manager will ensure that you receive the best possible care.

Call Now 

+44 844 589 2020
+44 203 973 8810