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Slipped disc

A Minamide, M Yoshida, A K Simpson, Y Nakagawa, H Iwasaki, S Tsutsui, M Takami, H Hashizume, Y Yukawa, H Yamada
Aims The aim of this study was to investigate the clinical and radiographic outcomes of microendoscopic laminotomy in patients with lumbar stenosis and concurrent degenerative spondylolisthesis (DS), and to determine the effect of this procedure on spinal stability. Patients and Methods A total of 304 consecutive patients with single-level lumbar DS with concomitant stenosis underwent microendoscopic laminotomy without fusion between January 2004 and December 2010. Patients were divided into two groups, those with and without advanced DS based on the degree of spondylolisthesis and dynamic instability...
April 1, 2018: Bone & Joint Journal
B Sachin Kumar, Sreeram K Kalpathy, S Anandhan
Randomly oriented nanofibers of nickel cobaltite (NCO) were fabricated using sol-gel electrospinning followed by calcination. The precursor fibers were collected on rotating disc (RDI) and rotating drum (RDR) collectors. Variable fictitious forces produce continuous deflection at each fiber landing position on the RDI collector, which subjects the nanofibers to non-bundling. On the other hand, in the case of the RDR collector, the fictitious forces act just at the surface, and these forces merely cause slip of the fibers along the rotational axis of the RDR...
February 6, 2018: Physical Chemistry Chemical Physics: PCCP
Michael Ghidiu, Sankalp Kota, Vadym Drozd, Michel W Barsoum
Pseudo-negative compressibility in layered materials is a phenomenon typically limited to in situ high-pressure experiments in some clay minerals and carbon-based materials. We show that the MXene Ti3 C2 T x expands along its crystallographic c direction when compressed in the presence of H2 O. This expansive effect occurs when a mixture of powders and excess water is quasi-hydrostatically compressed in a diamond anvil cell; it also occurs to a much larger extent when powders are pressed uniaxially into discs and, notably, persists after pressure is released...
January 2018: Science Advances
Er Qiang Li, Kenneth R Langley, Yuan Si Tian, Peter D Hicks, Sigurdur T Thoroddsen
Drops impacting on solid surfaces entrap small bubbles under their centers, owing to the lubrication pressure which builds up in the thin intervening air layer. We use ultrahigh-speed interference imaging, at 5 Mfps, to investigate how this air layer changes when the ambient air pressure is reduced below atmospheric. Both the radius and the thickness of the air disc become smaller with reduced air pressure. Furthermore, we find the radial extent of the air disc bifurcates, when the compressibility parameter exceeds ∼25...
November 24, 2017: Physical Review Letters
Nancy E Epstein, Renee D Hollingsworth
Background: In the lumbar spine, degenerative spondylolisthesis or degenerative (not traumatic) slippage of one vertebral body over another is divided into 4 grades - grade I (25%), grade II (50%), grade III (75%), and grade IV (100%). Dynamic X-rays, magnetic resonance (MR), and computed tomography (CT) scans document the slip secondary to arthritic changes of the facet joint plus stenosis, ossification of the yellow ligament, disc herniations, and synovial cysts. MR best demonstrates soft tissue pathology whereas CT better delineates ossific/calcified disease...
2017: Surgical Neurology International
Shehzad Khalid, Joe Iwanaga, Marios Loukas, R Shane Tubbs
Leg pain from lumbar disc herniation is a common presentation. However, certain muscular and peripheral nerve variants may present similarly and represent an unrecognized etiology of femoral nerve dysfunction. Such cases might affect the outcome of specific treatment regimes. Therefore, recognition of these variations in anatomy may be useful to the clinician when treating the patient with medically refractory lower limb pain. Some reports have reported variant slips of the psoas and iliacus muscles, which may split the femoral nerve causing a potential risk for nerve entrapment...
August 9, 2017: Curēus
Dalin Wang, Haifeng Yuan, An Liu, Changqing Li, Kaixiang Yang, Shengnai Zheng, Liming Wang, Jeffrey C Wang, Zorica Buser
To investigate the relationship between the facet fluid sign (FFS) and kinematics of affected lumbar segment in patients with low-grade, single-level lumbar degenerative spondylolisthesis using kinematic magnetic resonance imaging (kMRI).Materials and methods Ninety-two patients diagnosed with low-grade (Grade 1 or 2), single level lumbar degenerative spondylolisthesis L3 to S1. Angular and translational motion, whole lumbar motion, slip percentage, and facet angle were measured. Disc degeneration and degrees of osteoarthritis were graded, facet effusion was evaluated and classified as Positive or Negative FFS (PosFFS or NegFFS)...
September 2017: European Journal of Radiology
Erik Y Tye, Joseph E Tanenbaum, Andrea S Alonso, Roy Xiao, Michael P Steinmetz, Thomas E Mroz, Jason W Savage
BACKGROUND CONTEXT: Transforaminal lumbar interbody fusion (TLIF) or anterior lumbar interbody fusion with percutaneous pedicle screws (ALIFPS) offer significantly higher radiographic fusion rates than other fusion techniques for L5-S1 isthmic spondylolisthesis (IS). As it stands, there is a relative paucity of comparative data of the two techniques. PURPOSE: To define the clinical, radiographic, and financial differences between TLIF and ALIFPS for L5-S1 IS. DESIGN/SETTING: A retrospective cohort study conducted at a single tertiary care center...
August 15, 2017: Spine Journal: Official Journal of the North American Spine Society
Kamil Koszela, Sylwia Krukowska, Marta Woldańska-Okońska
Back pain may be caused by many factors. In many cases it is difficult to unambiguously determine a cause of the pathology, which can involve various structures in the spine. In this paper we will discuss the symptoms associated with the degenerative changes of the intervertebral disc, which involve, among others, its bulging, dislocation and pressure on the surrounding structures. These problems require an adequate clinical and imaging diagnostics in order to implement an appropriate treatment. In the first place, it should be based on the conservative methods (such as: pharmacotherapy, rehabilitation and lifestyle changes)...
May 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
Myung Soo Youn, Jong Ki Shin, Tae Sik Goh, Jung Sub Lee
BACKGROUND: Several different techniques exist to treat degenerative lumbar foraminal stenosis. Failure to adequately decompress the lumbar foramen may lead to failed back surgery syndrome. However, wide decompression often causes spinal instabilities or may require an additional fusion surgery. The aim of this study was to report the outcomes of endoscopic partial facetectomy (EPF) performed on patients with degenerative lumbar foraminal stenosis. METHODS: Between 2012 and 2014, 25 consecutive patients (12 women and 13 men) who underwent EPF were included in the study...
June 2017: Acta Neurochirurgica
Peter Bella, Robert V Kohn
We consider a disc-shaped thin elastic sheet bonded to a compliant sphere. (Our sheet can slip along the sphere; the bonding controls only its normal displacement.) If the bonding is stiff (but not too stiff), the geometry of the sphere makes the sheet wrinkle to avoid azimuthal compression. The total energy of this system is the elastic energy of the sheet plus a (Winkler-type) substrate energy. Treating the thickness of the sheet h as a small parameter, we determine the leading-order behaviour of the energy as h tends to zero, and we give (almost matching) upper and lower bounds for the next-order correction...
May 13, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
Seiji Ohtori, Sumihisa Orita, Kazuyo Yamauchi, Yawara Eguchi, Yasuchika Aoki, Junichi Nakamura, Masayuki Miyagi, Miyako Suzuki, Gou Kubota, Kazuhide Inage, Takeshi Sainoh, Jun Sato, Kazuki Fujimoto, Yasuhiro Shiga, Koki Abe, Hiroto Kanamoto, Gen Inoue, Kazuhisa Takahashi, Takeo Furuya, Masao Koda
STUDY DESIGN: Retrospective case series. PURPOSE: The purpose of this study was to examine changes in the ligamentum flavum thickness and remodeling of the spinal canal after anterior fusion during a 10-year follow-up. OVERVIEW OF LITERATURE: Extreme lateral interbody fusion provides minimally invasive treatment of the lumbar spine; this anterior fusion without direct posterior decompression, so-called indirect decompression, can achieve pain relief...
February 2017: Asian Spine Journal
P Utriainen, A Vatanen, S Toiviainen-Salo, U Saarinen-Pihkala, O Mäkitie, K Jahnukainen
High-dose therapy and hematopoietic stem cell transplantation (HSCT) have been shown to improve survival rates in high-risk neuroblastoma (HR-NBL), but may cause adverse effects on the growing skeleton. We studied skeletal health in a national cohort of long-term survivors of HR-NBL (n=21; age 16-30 years, median 22 years) and in 20 healthy age- and sex-matched controls. In addition to clinical evaluation and measurement of bone mineral density (BMD) by dual-energy X-ray absorptiometry, we performed spinal magnetic resonance imaging...
January 9, 2017: Bone Marrow Transplantation
Masao Koda, Chikato Mannoji, Masazumi Murakami, Tomoaki Kinoshita, Jiro Hirayama, Tomohiro Miyashita, Yawara Eguchi, Masashi Yamazaki, Takane Suzuki, Masaaki Aramomi, Mitsutoshi Ota, Satoshi Maki, Kazuhisa Takahashi, Takeo Furuya
STUDY DESIGN: Retrospective case-control study. PURPOSE: To determine whether kissing spine is a risk factor for recurrence of sciatica after lumbar posterior decompression using a spinous process floating approach. OVERVIEW OF LITERATURE: Kissing spine is defined by apposition and sclerotic change of the facing spinous processes as shown in X-ray images, and is often accompanied by marked disc degeneration and decrement of disc height. If kissing spine significantly contributes to weight bearing and the stability of the lumbar spine, trauma to the spinous process might induce a breakdown of lumbar spine stability after posterior decompression surgery in cases of kissing spine...
December 2016: Asian Spine Journal
Suhair O Shebani, Rizwan Rehman, Demetris Taliotis, Alan Magee, Nicholas J Hayes, Osman Baspinar, Zunzunegui Martínez, Nikolaus Haas, Christopher Duke
To gather current experience in Occlutech ASD device retrieval, to determine whether snaring is an effective technique and to highlight alternative retrieval techniques; METHODS AND RESULTS: United Kingdom and European Occlutech ASD device implanters reported their experience in dealing with device embolization and retrieval. Six operators reported 12 retrieval cases. Retrieval was successful in 92% (11/12), although in most cases it was not straightforward and required multiple attempts using different techniques and equipment...
March 1, 2017: Catheterization and Cardiovascular Interventions
Nam Lee, Gyu Yeul Ji, Seong Yi, Do Heum Yoon, Dong Ah Shin, Keung Nyun Kim, Yoon Ha, Chang Hyun Oh
BACKGROUND: It is well documented that epidural adhesion is associated with spinal pain. However, the underlying mechanism of spinal pain generation by epidural adhesion has not yet been elucidated. OBJECTIVES: To elucidate the underlying mechanism of spinal pain generation by epidural adhesion using a two-dimensional (2D) non-linear finite element (FE) analysis. STUDY DESIGN: A finite element analysis. SETTING: A two-dimensional nonlinear FE model of the herniated lumbar disc on L4/5 with epidural adhesion...
July 2016: Pain Physician
Saher Abu-Leil, Yizhar Floman, Yigal Bronstein, Youssef Masharawi
PURPOSE: Most morphometric studies on lumbar degenerative spondylolisthesis (DS) have focused solely on the L4-L5 slipped level, neglecting the shape of the entire lumbar segments. The purpose of this study was to present a morphometric analysis of the entire lumbar IVDs and VBs in DS. METHODS: Out of 500 lumbar CTs, the first 100 CTs, 50 with DS at L4 and 50 age- and sex-matched control CTs, were randomly selected. All lumbar IVD and VB heights, widths, lengths and sagittal wedging as well as lumbar lordosis (LL) and sacral inclination (SI) were measured and relevant ratios calculated...
August 2016: European Spine Journal
Gregory D Schroeder, Cynthia R LaBella, Marco Mendoza, Erika L Daley, Jason W Savage, Alpesh A Patel, Wellington K Hsu
PURPOSE: To determine if adolescent athletics increases the risk of structural abnormalities in the lumbar spine. METHODS: A retrospective review of patients (ages 10-18) between 2004 and 2012 was performed. Pediatric patients with symptomatic low back pain, a lumbar spine MRI, and reported weekly athletic activity were included. Patients were stratified to an "athlete" and "non-athlete" group. Lumbar magnetic resonance and plain radiographic imaging was randomized, blinded, and evaluated by two authors for a Pfirrmann grade, herniated disc, and/or pars fracture...
September 2016: European Spine Journal
Shiro Imagama, Noriaki Kawakami, Tokumi Kanemura, Yuji Matsubara, Taichi Tsuji, Tetsuya Ohara, Yoshito Katayama, Naoki Ishiguro
STUDY DESIGN: Retrospective clinical study. OBJECTIVE: To investigate adjacent segment degeneration (ASD) at 5 years after L4/5 posterior lumbar interbody fusion (PLIF) with pedicle screw instrumentation and L4/5 decompression surgery using plain radiographs, CT and MRI, with evaluation of annual changes on MRI. SUMMARY OF BACKGROUND DATA: Methods of evaluation have been inconsistent among studies of ASD. There is no report that ASD in the lumbar spine after PLIF at the same level is thoroughly evaluated on radiographs, CT, annual MRI changes, and the impact of decompression procedures...
May 2, 2016: Clinical Spine Surgery
Hubertine Marjoleine Willems, Kevin Kos, Mary Ann Jabra-Rizk, Bastiaan P Krom
Streptococcus mutans is a Gram-positive bacterium involved in development to caries, the most common infectious disease of our time. Streptococcus mutans interacts with other microbes, like the fungus Candida albicans and both are commonly isolated from patients with caries. Since the role of C. albicans in caries remains unknown, our aim was to unravel this using an in vitro dual-species cariogenic oral biofilm model. Biofilms were grown for 24-72 h on glass cover slips or hydroxyapatite (HA) disks to mimic the surface of teeth...
July 2016: Pathogens and Disease
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