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Three dimensional analysis of brace biomechanical efficacy for patients with AIS.

Eur Spine J. 2013 Jul 20;

Authors: Lebel DE, Al-Aubaidi Z, Shin EJ, Howard A, Zeller R

Abstract
PURPOSE: Corrective three dimensional (3D) effect of different braces is debatable. We evaluated differences in in-brace radiographic correction comparing a custom thoracic-lumbo-sacral-orthosis (TLSO) (T) brace to a Chêneau type TLSO (C) brace using 3D EOS reconstruction technology. Our primary research question was the 3D effect of brace on the spine and in particularly the apical vertebra rotation (AVR).
METHODS: This was a retrospective comparative analysis of patients with adolescent idiopathic scoliosis who had orthogonal AP and lateral X-rays with and without brace. A 3D image of the spine was reconstructed. Coronal, sagittal and axial spine parameters were measured before bracing and then on the first post-brace X-ray. Brace efficacy in controlling coronal, sagittal and axial parameters was evaluated.

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Ultrasound-guided versus computed tomography-controlled periradicular injections in the middle and lower cervical spine: a prospective randomized clinical trial.

Eur Spine J. 2013 Jul 23;

Authors: Obernauer J, Galiano K, Gruber H, Bale R, Obwegeser AA, Schatzer R, Loizides A

Abstract
PURPOSE: We conducted this study to evaluate accuracy, time saving, radiation doses, safety, and pain relief of ultrasound (US)-guided periradicular injections versus computed tomography (CT)-controlled interventions in the cervical spine in a prospective randomized clinical trial.
METHODS: Forty adult patients were consecutively enrolled and randomly assigned to either a US or a CT group. US-guided periradicular injections were performed on a standard ultrasound device using a broadband linear array transducer. By basically following the osseous landmarks for level definition in "in-plane techniques", a spinal needle was advanced as near as possible to the intended, US-depicted nerve root. The respective needle tip positioning was then verified by CT. The control group underwent CT-guided injections, which were performed under standardized procedures using the CT-positioning laser function.

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Answer to the editorial of j. O'Dowd and a. Casey.

Eur Spine J. 2013 Aug;22(8):1698-9

Authors: Albert HB

PMID: 23873053 [PubMed - in process]

Read more... http://www.ncbi.nlm.nih.gov/pubmed/23873053?dopt=Abstract

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Cervical arthroplasty with Discover prosthesis: clinical outcomes and analysis of factors that may influence postoperative range of motion.

Eur Spine J. 2013 Jul 23;

Authors: Li J, Liang L, Ye XF, Qi M, Chen HJ, Yuan W

Abstract
PURPOSE: The aim of this current study was to analyze the clinical outcomes after Discover cervical disc replacement and its effects on maintaining cervical lordosis and range of motion (ROM). The possible factors influencing postoperative ROM were analyzed.
METHOD: 27 men and 28 women with a mean age of 46.4 ± 8.7 years were prospectively followed up for 2 years. Clinical outcomes were assessed using Japanese Orthopedic Association (JOA), Neck Disability Index (NDI), visual analog scale (VAS) and Odom's criteria. Radiographic information including segment and overall alignment, functional spinal unit (FSU) and overall ROM, and disc heights were prospectively collected during the follow-up. The correlations between the postoperative FSU ROM at last follow-up and influencing factors were analyzed.
RESULTS: Mean NDI, JOA and VAS scores showed statistical improvements at last follow-up. Anterior migration of the prosthesis was detected in six cases. Heterotopic ossification was observed in ten patients. Mean FSU angle, endplate angle of the treated level and mean overall cervical alignment were all improved significantly at last follow-up (P < 0.001). However, mean FSU ROM of the treated segment

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Clinico-biomechanical considerations on oblique corpectomy. Response to: Multilevel oblique corpectomy for cervical spondylotic myelopathy preserves segmental motion (by A.G. Chacko et al.).

Eur Spine J. 2013 Jul 20;

Authors: Duart Clemente JM, Duart Clemente JV

PMID: 23873052 [PubMed - as supplied by publisher]

Read more... http://www.ncbi.nlm.nih.gov/pubmed/23873052?dopt=Abstract

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Parameters influencing the outcome after total disc replacement at the lumbosacral junction. Part 1: misalignment of the vertebrae adjacent to a total disc replacement affects the facet joint and facet capsule forces in a probabilistic finite element analysis.

Eur Spine J. 2013 Jul 20;

Authors: Rohlmann A, Lauterborn S, Dreischarf M, Schmidt H, Putzier M, Strube P, Zander T

Abstract
PURPOSE: After total disc replacement with a ball-and-socket joint, reduced range of motion and progression of facet joint degeneration at the index level have been described. The aim of the study was to test the hypothesis that misalignment of the vertebrae adjacent to the implant reduces range of motion and increases facet joint or capsule tensile forces.
METHODS: A probabilistic finite element analysis was performed using a lumbosacral spine model with an artificial disc at level L5/S1. Misalignment of the L5 vertebra, the gap size of the facet joints, the transection of the posterior longitudinal ligament, and the spinal shape were varied. The model was loaded with pure moments.

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Expert's comment concerning Grand Rounds case entitled "Minimal access bilateral transforaminal lumbar interbody fusion for high-grade isthmic spondylolisthesis" (by Nasir A. Quraishi and Y. Raja Rampersaud; doi:10.1007/s00586-012-2623-2).

Eur Spine J. 2013 Aug;22(8):1714-6

Authors: Birkenmaier C

Abstract
This Expert's Comment discusses the Grand Rounds Case entitled "Minimal Access Bilateral Transforaminal Lumbar Interbody Fusion for High-Grade Isthmic Spondylolisthesis" by Nasir A Quraishi and Raja Y Rampersaud. It puts a technically elegant surgical method for minimally invasive reduction and arthrodesis of isthmic spondylolistheses into the context of short and long term outcomes and questions the motivations for performing such minimally invasive procedures in the absence of any proven mid or long term advantages over more traditional techniques. In addition, the use of BMP in spinal arthrodesis is discussed on the background of recently published IPD metaanalyses from the Infuse™ spinal FDA trials.

PMID: 23868222 [PubMed - in process]

Read more... http://www.ncbi.nlm.nih.gov/pubmed/23868222?dopt=Abstract

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Is Off-Label Use of BMP in Pediatric Spine Surgery Now a Standard of Care?: Commentary on an article by Amit Jain, MD, et al.: "Factors Associated with Use of Bone Morphogenetic Protein During Pediatric Spinal Fusion Surgery. An Analysis of 4817 Patients".

J Bone Joint Surg Am. 2013 Jul 17;95(14):e1031-2

Authors: Haft GF

PMID: 23864186 [PubMed - in process]

Read more... http://www.ncbi.nlm.nih.gov/pubmed/23864186?dopt=Abstract

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Answer to the Letter to the Editor of I. Berg et al. concerning "Adolescent idiopathic scoliosis treated with posteromedial translation: radiologic evaluation with a 3D low-dose system" by B. Ilharreborde, G. Sebag, W. Skalli and K. Mazda; Eur Spine J (2013) Apr 12 [doi:10.1007/s00586-013-2902-6].

Eur Spine J. 2013 Jul 17;

Authors: Ilharreborde B

PMID: 23860779 [PubMed - as supplied by publisher]

Read more... http://www.ncbi.nlm.nih.gov/pubmed/23860779?dopt=Abstract