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https://www.readbyqxmd.com/read/29770178/dynamic-stabilization-for-degenerative-diseases-in-the-lumbar-spine-2-years-results
#1
Ahmed Hosny Khalifa, Timo Stübig, Oliver Meier, Christian Walter Müller
Following lumbar fusion, adjacent segment degeneration has been frequently reported. Dynamic systems are believed to reduce main fusion drawbacks. We conducted a retrospective study on patients with degenerative lumbar disease treated with posterior dynamic stabilization with monoaxial hinged pedicular screws and lumbar decompression. VAS and ODI were used to compare clinical outcomes. As radiological outcomes, LL and SVA were used. 51 patients were included with an average follow-up of 24 months. 13 patients were revised because of postoperative radiculopathy (n=4), subcutaneous hematoma (n=2), L5 screw malposition (n=1) and adjacent segment disease (n=6)...
March 29, 2018: Orthopedic Reviews
https://www.readbyqxmd.com/read/29755233/cervical-lift-up-laminoplasty-with-titanium-basket-plates-after-resection-of-intradural-tumor
#2
Keisuke Shirosaka, Kentaro Naito, Toru Yamagata, Masaki Yoshimura, Kenji Ohata, Toshihiro Takami
Background: Performing cervical laminoplasty after wide laminectomy may be technically demanding. The unique technique of cervical lift-up laminoplasty using titanium basket plates was applied for the reconstruction of cervical laminae after wide laminectomy for the resection of intradural tumors. Materials and Methods: This technical study included 14 cases that could be followed periodically for at least 6 months after surgery. Participants were 8 male and 6 female, with a mean age of 41...
January 2018: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29728924/the-impact-of-deep-surgical-site-infection-on-surgical-outcomes-after-posterior-adult-spinal-deformity-surgery-a-matched-control-study
#3
Sleiman Haddad, Susana Núñez-Pereira, Carlos Pigrau, Dolors Rodríguez-Pardo, Alba Vila-Casademunt, Ahmet Alanay, Emre R Acaroglu, Frank S Kleinstueck, Ibrahim Obeid, Francisco Javier Sanchez Perez-Grueso, Ferran Pellisé
PURPOSE: The impact of deep surgical site infection (SSI) on surgical outcomes after adult spinal deformity (ASD) surgery is still unclear. We aimed to study the morbidity of SSI in ASD and its impact on deformity correction and functional outcome. METHODS: Prospective multicenter matched-cohort study including consecutively enrolled ASD patients. Patients developing SSI were matched to similar controls in terms of age, gender, ASA, primary or revision, extent of fusion, and use of tri-columnar osteotomies...
May 4, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29727415/radiographic-and-clinical-outcomes-of-adolescents-with-acetabular-retroversion-treated-arthroscopically
#4
Jody Litrenta, Brian Mu, Austin W Chen, Victor Ortiz-Declet, Itay Perets, Benjamin G Domb
BACKGROUND: Retroversion of the acetabulum is a cause of pincer impingement. Symptomatic retroversion has traditionally been treated with anteverting periacetabular osteotomy (PAO). However, arthroscopic rim trimming can also treat pincer impingement associated with acetabular retroversion. The purpose of this study was to report the outcomes and radiographic findings in a series of adolescent patients with symptomatic acetabular retroversion treated arthroscopically. METHODS: Data were prospectively gathered at a single institution using an established hip preservation registry...
April 30, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29726795/complication-rates-for-preexisting-baclofen-pumps-and-ventricular-shunts-following-scoliosis-correction-a-preliminary-study
#5
Jonathan Dallas, Katherine D Sborov, Bradley S Guidry, Silky Chotai, Christopher M Bonfield
OBJECTIVE Many patients undergoing spinal fusion for neuromuscular scoliosis have preexisting neurosurgical implants, including ventricular shunts (VSs) for hydrocephalus and baclofen pumps (BPs) for spastic cerebral palsy. Recent studies have discussed a possible increase in implant complication rates following spinal fusion, but published data are inconclusive. The authors therefore, sought to investigate: 1) the rate of implant complications following fusion, 2) possible causes of these complications, and 3) factors that place patients at higher risk for implant-related complications...
May 4, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29725835/critical-differences-between-subtrochanteric-and-diaphyseal-atypical-femoral-fractures-analyses-of-51-cases-at-a-single-institution-in-korean-population
#6
Yoon-Je Cho, Kyung-Chung Kang, Young-Soo Chun, Kee Hyung Rhyu, Sang-Jun Kim, Tae-Su Jang
There still remains controversy on the pathomechanism of atypical femoral fracture (AFF). The angle of lateral bowing and bone mineral density showed significant differences between subtrochanteric and diaphyseal atypical fracture groups. In addition to the use of bisphosphonate, mechanical factors might play important roles in the occurrence of AFFs. INTRODUCTION: Although AFF could be divided into subtrochanteric and diaphyseal fracture according to the location of fractures, there is a lack of evidence regarding differences between two fractures and etiology of the occurrence...
May 3, 2018: Archives of Osteoporosis
https://www.readbyqxmd.com/read/29713404/accuracy-and-safety-of-percutaneous-lumbosacral-pedicle-screw-placement-using-dual-planar-intraoperative-fluoroscopy
#7
Conor Dunn, Michael Faloon, Edward Milman, Sina Pourtaheri, Kumar Sinah, Ki Hwang, Arash Emami
Study Design: Retrospective case series with prospective arm. Purpose: To assess the safety and accuracy of percutaneous lumbosacral pedicle screw placement (PLPSP) in the lumbosacral spine using intraoperative dual-planar fluoroscopy (DPF). Overview of Literature: There are several techniques available for achieving consistent, safe, and accurate results with PLPSP. There is a paucity of literature describing the beneficial operative, economic, and clinical outcomes of DPF, the most readily accessible image guidance system...
April 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/29709744/radiographic-fusion-grade-does-not-impact-health-related-quality-of-life-in-the-absence-of-instrumentation-failure-for-patients-undergoing-posterior-instrumented-fusion-for-adult-spinal-deformity
#8
Tamir Ailon, D Koho Hamilton, Erik Klineberg, Alan H Daniels, Virginie Lafage, Shay Bess, Douglas C Burton, Munish Gupta, Frank Schwab, Christopher P Ames, Justin S Smith, Christopher I Shaffrey, Robert A Hart
BACKGROUND: Pseudarthrosis and rod fracture (RF) remain significant concerns following fusions for adult spinal deformity (ASD). While a radiographic system of fusion grade has been proposed, the correlation between fusion grade and Health Related Quality of Life measures (HRQoL) is not known. METHODS: In a retrospective review of a prospectively collected clinical database, patients that underwent ≥ 5 level posterior instrumented arthrodesis for ASD were evaluated...
April 27, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29709549/use-of-the-subcutaneous-lumbar-spine-sls-index-as-a-predictor-for-surgical-complications-in-lumbar-spine-surgery
#9
Kylie Shaw, James Chen, William Sheppard, Mohanad Alazzeh, Howard Park, Don Park, A Nick Shamie
BACKGROUND CONTEXT: Lumbar spine surgeries require adequate exposure to visualize key structures and limited exposure can make surgery more technically difficult, thus increasing the potential for complications. Body mass index and body mass distribution have been shown to be associated with worse surgical outcomes. PURPOSE: This study aims to further previous investigations in elucidating the predictive nature of body mass distribution with peri- and post-operative complications in lumbar surgery...
April 27, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29705337/cost-effectiveness-of-circumferential-fusion-for-lumbar-spondylolisthesis-propensity-matched-comparison-of-transforaminal-lumbar-interbody-fusion-versus-anterior-posterior-fusion
#10
Ehsan Jazini, Jeffrey L Gum, Steven D Glassman, Charles H Crawford, Mladen Djurasovic, R Kirk Owens, John R Dimar, Katlyn E McGraw, Leah Y Carreon
BACKGROUND CONTEXT: Transforaminal Lumbar Interbody Fusion (TLIF) and dual approach antero-posterior (AP) are common techniques to achieve circumferential fusion for lumbar spondylolisthesis. It is unclear which approach is more cost-effective. PURPOSE: Our goal is to determine the incremental cost-effectiveness ratio (ICER) by calculating the cost per quality-adjusted life year (QALY) for each approach. STUDY DESIGN/SETTING: Propensity matched cost-effectiveness comparison...
April 26, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29704024/the-relationship-of-pelvic-incidence-to-post-operative-total-hip-arthroplasty-dislocation-in-patients-with-lumbar-fusion
#11
Philip J York, Alan S McGee, Chase S Dean, Justin E Hellwinkel, Christopher J Kleck, Michael R Dayton, Craig A Hogan
PURPOSE: To determine if lumbar fusion increases the risk of dislocation following total hip arthroplasty (THA) via a posterior approach and to investigate anatomic variables associated with this increased risk. METHODS: Five-year retrospective review of THAs performed through a posterior approach identifying cases of post-operative dislocation. Patients were grouped into those with or without previous lumbar spine fusion. Lumbar fusion patients were then further analyzed in terms of cup position, pelvic incidence, sacral slope, and pelvic tilt to determine if there were specific variables associated with the increased risk of dislocation...
April 28, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29690450/three-new-species-of-parapercis-perciformes-pinguipedidae-and-first-records-of-p-muronis-tanaka-1918-and-p-rubromaculata-ho-chang-shao-2012-from-australia
#12
Jeffrey W Johnson, Jessica Worthington Wilmer
Three new species of pinguipedid fishes from northern Australia are described based on specimens collected by deep water demersal trawling. Parapercis algrahami sp. nov. is recorded from off Dunk Island, Qld, south to Newcastle, NSW, in 67-333 m. It is distinct in having five narrow transverse dark bars across the upper body and a dark spot dorsally on the caudal-fin base, 6 canine teeth in outer row at front of lower jaw, palatines with 1-2 rows of teeth, and predorsal scales extending far forward on the nape to the posterior portion of the interorbital region...
March 1, 2018: Zootaxa
https://www.readbyqxmd.com/read/29690406/a-taxonomic-review-of-the-genus-astrodendrum-echinodermata-ophiuroidea-euryalida-gorgonocephalidae-with-description-of-a-new-species-from-japan
#13
Masanori Okanishi, Toshihiko Fujita
A revision of the genus Astrodendrum Döderlein (Ophiuroidea, Euryalida, Gorgonocephalidae) is based on 14 specimens, including the holotypes of Astrodendrum galapagense A. H. Clark and Astroconus capense Mortensen and a syntype of Gorgonocephalus sagaminus Döderlein. A new species Astrodendrum spinulosum is described from the Pacific coast of Japan. It is distinguished from its congeners in having conical external ossicles on aboral side of the disc; bulges on lateral edges of proximal arms; 1 terminal projection on each arm spine of proximal portion of the arm; 2 or 3 secondary teeth on each hook-shaped arm spine of distal portion of the arm...
March 8, 2018: Zootaxa
https://www.readbyqxmd.com/read/29689931/review-and-clinal-variation-of-new-zealand-anabaxis-raffray-coleoptera-staphylinidae-pselaphinae-goniaceritae
#14
Jia-Wei Shen, Richard A B Leschen
The New Zealand members of the genus Anabaxis Raffray are revised to accommodate three species, including one new species: Anabaxis chathamensis sp. nov. A key and an illustrated catalogue to the described species from New Zealand and Australia are included. Lectotypes are designated for A. brevis Oke, A. electrica King, A. foveolata Broun, A. inusitata Blackburn, A. lunatica King, A. quinquefoveolata Raffray, and A. vagus Oke. The widespread New Zealand species A. foveolata exhibits an unusual form of clinal variation in sex-linked characters of the male legs...
February 21, 2018: Zootaxa
https://www.readbyqxmd.com/read/29673199/thoracic-lumbar-and-sacral-pedicle-screw-placement-using-stryker-ziehm-virtual-screw-technology-and-navigated-stryker-cordless-driver-3-technical-note
#15
Praveen Satarasinghe, Kojo D Hamilton, Michael J Tarver, Robert J Buchanan, Michael T Koltz
OBJECT: Utilization of pedicle screws (PS) for spine stabilization is common in spinal surgery. With reliance on visual inspection of anatomical landmarks prior to screw placement, the free-hand technique requires a high level of surgeon skill and precision. Three-dimensional (3D), computer-assisted virtual neuronavigation improves the precision of PS placement and minimization steps. METHODS: Twenty-three patients with degenerative, traumatic, or neoplastic pathologies received treatment via a novel three-step PS technique that utilizes a navigated power driver in combination with virtual screw technology...
April 17, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29664852/lower-extremity-motor-function-following-complex-adult-spinal-deformity-surgery-two-year-follow-up-in-the-scoli-risk-1-prospective-multicenter-international-study
#16
Lawrence G Lenke, Christopher I Shaffrey, Leah Y Carreon, Kenneth M C Cheung, Benny T Dahl, Michael G Fehlings, Christopher P Ames, Oheneba Boachie-Adjei, Mark B Dekutoski, Khaled M Kebaish, Stephen J Lewis, Yukihiro Matsuyama, Hossein Mehdian, Ferran Pellisé, Yong Qiu, Frank J Schwab
BACKGROUND: The reported neurologic complication rate following surgery for complex adult spinal deformity (ASD) is variable due to several factors. Most series have been retrospective with heterogeneous patient populations and use of nonuniform neurologic assessments. The aim of this study was to prospectively document lower extremity motor function by means of the American Spinal Injury Association (ASIA) lower extremity motor score (LEMS) before and through 2 years after surgical correction of complex ASD...
April 18, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29662742/total-disc-replacement-versus-anterior-posterior-interbody-fusion-in-the-lumbar-spine-and-lumbosacral-junction-a-cost-analysis
#17
Timo Stubig, Malik Ahmed, Amir Ghasemi, Luigi Aurelio Nasto, Michael Grevitt
Study Design: Prospective observational cohort study. Objectives: To analyze clinical and economic results in patients with degenerative disc disease in the lumbar area for patients who received combined anterior and posterior fusion or total disc replacement (TDR). Methods: The study included 75 patients, 38 in the fusion group and 37 in the TDR group, who received either anterior/posterior fusion or TDR for lumbar disc disease from January 2005 to December 2008 with a minimum follow-up of 24 months...
April 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29661205/comparison-between-minimally-invasive-spine-stabilization-with-and-without-posterior-decompression-for-the-management-of-spinal-metastases-a-retrospective-cohort-study
#18
Hiroshi Uei, Yasuaki Tokuhashi, Masafumi Maseda, Masahiro Nakahashi, Hirokatsu Sawada, Enshi Nakayama, Hirotoki Soma
BACKGROUND: Posterior decompression and stabilization plays significant roles in palliative surgery for metastatic spinal tumor. However, the indication for addition of posterior decompression have not been examined. The purpose of this study was to investigate a retrospective cohort of outcomes of metastatic spinal tumor treated with minimally invasive spine stabilization (MISt) with or without posterior decompression. METHODS: The subjects were 40 patients who underwent MISt using percutaneous pedicle screws for metastatic spinal tumor, including 20 patients treated with stabilization alone (group A) and 20 patients with added posterior decompression (group B)...
April 16, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29652237/failure-of-facet-replacement-system-with-metal-on-metal-bearing-surface-and-subsequent-discovery-of-cobalt-allergy-report-of-2-cases
#19
Matthew L Goodwin, William Ryan Spiker, Darrel S Brodke, Brandon D Lawrence
The aim of this study was to report on 2 patients in whom metal-on-metal (MOM) facet replacements failed, with subsequent positive findings on allergy testing. Motion-preserving devices have been used with limited success when instrumentation is indicated in the mobile spine. MOM-bearing surfaces in orthopedics were developed to increase implant longevity, yet have been associated with numerous adverse outcomes, including local tissue reactions, pseudotumors, metallosis, and the need for revision surgery. Five patients with spinal stenosis and low-grade spondylolisthesis were randomized to undergo facet replacement surgery with the ACADIA facet replacement system at the authors' institution...
April 13, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29649647/the-clinical-outcomes-of-primary-and-revision-untethering-surgery-in-patients-with-tethered-cord-syndrome-and-spinal-bifida
#20
Jingchuan Sun, Yao Zhang, Haibo Wang, Yuan Wang, Yong Yang, Qingjie Kong, Ximing Xu, Jiangang Shi
BACKGROUND: Tethered cord syndrome (TCS) is an increasingly recognized clinical condition, with untethering surgery as the classically effective treatment. Yet, as evidence aggregated, the surgical outcome untethering, remains controversial. This study aimed to systematically evaluate the clinical outcomes after untethering surgery in primary and re-tethering patients. METHODS: This retrospective study was conducted by department of spine surgery of Changzheng Hospital from January to December 2016...
April 9, 2018: World Neurosurgery
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