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annular bulging L4, L5

Masni-Azian, Masao Tanaka
Intervertebral disc degeneration involves changes in its material properties that affect the mechanical functions of the spinal system. However, the alteration of the biomechanics of a spinal segment through specific material degradation in a specific region is poorly understood. In this study, the influence of the constitutive material degeneration of disc tissues on the mechanics of a lower lumbar spinal unit was examined using a three-dimensional nonlinear finite element model of the L4-L5 functional spinal unit...
May 6, 2018: Computers in Biology and Medicine
Pokhraj Suthar, Rupal Patel, Chetan Mehta, Narrotam Patel
INTRODUCTION: Lower back pain secondary to degenerative disc disease is a condition that affects young to middle-aged persons with peak incidence at approximately 40 y. MRI is the standard imaging modality for detecting disc pathology due to its advantage of lack of radiation, multiplanar imaging capability, excellent spinal soft-tissue contrast and precise localization of intervertebral discs changes. AIMS AND OBJECTIVE: To evaluate the characterization, extent, and changes associated with the degenerative lumbar disc disease by Magnetic Resonance Imaging...
April 2015: Journal of Clinical and Diagnostic Research: JCDR
Sang Jin Kim, Tae Hoon Lee, Soo Mee Lim
OBJECTIVE: Asymptomatic patients show high degeneration prevalence at lumbar disc in previous literatures. Unfortunately, there are few Korean data, so the authors attempted to analyze the prevalence of disc degeneration in highly selective asymptomatic Korean subjects using MRI. METHODS: We performed 3 T MRI sagittal scans from T12 to S1 on 102 asymptomatic subjects (50 men and 52 women) who visited our hospital between the ages of 14 and 82 years (mean age 46...
January 2013: Journal of Korean Neurosurgical Society
Daniel G T Strange, Sandie T Fisher, Philip C Boughton, Thomas J Kishen, Ashish D Diwan
BACKGROUND CONTEXT: Discectomy is a common procedure for treating sciatica. However, both the operation and preceding herniated disc alter the biomechanical properties of the spinal segment. The disc mechanics are also altered in patients with chronic contained herniation. The biomechanical properties of the disc can potentially be restored with an elastomeric nucleus replacement implanted via minimally invasive surgery. PURPOSE: The purpose of this study was to determine whether the compressive characteristics of the intervertebral disc after a nucleotomy can be restored with an elastomeric nucleus replacement...
July 2010: Spine Journal: Official Journal of the North American Spine Society
J W Reggars, S D French
Objective: To discuss a case of leptomenigeal disease mimicking a lower lumbar disc lesion and accompanying neurological deficit.Clinical Features: A 62 year old male presented with a 3-4 day history of left low back and left posterior thigh pain. The patient had a previous history of non-specific low back pain for approximately 10-25 years, which was relieved in the past by manual therapy. He was also currently being treated by a medical oncologist with chemotherapy for low grade non-Hodgkin's lymphoma, which was considered stable...
November 1998: Australasian Chiropractic & Osteopathy: Journal of the Chiropractic & Osteopathic College of Australasia
William C Hutton, Hideki Murakami, Jun Li, William A Elmer, S Tim Yoon, Akihito Minamide, Tomoyuki Akamaru, Katsuro Tomita
BACKGROUND: The hypothesis that injecting bone cement adjacent to one or both endplates would bring about degeneration in the intervening disc was tested. METHODS: In 11 dogs, bone cement was injected just below the superior endplates of L1, L2, and L3 to block the nutritional supply through these endplates to the three intervertebral discs T13-L1, L1-L2, and L2-L3. In one other dog, both the superior and the inferior endplates of the same discs (T13-L1, L1-L2, and L2-L3) were blocked with bone cement...
February 2004: Journal of Spinal Disorders & Techniques
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