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https://www.readbyqxmd.com/read/29457442/-development-and-application-of-artificial-vertebral-body
#1
REVIEW
Jian-Tao Liu, Feng Zhang, Zheng-Chao Gao, Bin-Bin Niu, Yu-Huan Li, Xi-Jing He
Artificial vertebral body has achieved good results in treating spinal tumors, tuberculosis, fracture and other diseases. Currently, artificial vertebral body with variety of kinds and pros and cons, is generally divided into two types: fusion type and movable type. The former according to whether the height could be adjusted and strength of self-stability is divided into three types: support-fixed type, adjust-fixed type and self-fixed type. Whether the height of self-fixed type could be adjusted is dependent on structure of collar thread rotation...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29451436/novel-posterior-artificial-atlanto-odontoid-joint-for-atlantoaxial-instability-a-biomechanical-study
#2
Kai Shen, Zhongliang Deng, Junsong Yang, Chao Liu, Ranxi Zhang
OBJECTIVE Atlantoaxial instability is usually corrected by anterior and/or posterior C1-2 fusion. However, fusion can lead to considerable loss of movement at the C1-2 level, which can adversely impact a patient's quality of life. In this study, the authors investigated the stability and function of a novel posterior artificial atlanto-odontoid joint (NPAAJ) by using cadaveric cervical spines. METHODS The Oc-C7 regions from 10 cadaveric spines were used for anteroposterior (AP) translation and range of motion (ROM) tests while intact and after destabilization, NPAAJ implantation, and double-rod fixation...
February 16, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29404660/peripheral-dxa-measurement-around-ankle-joint-to-diagnose-osteoporosis-as-assessed-by-central-dxa-measurement
#3
Ki Hyuk Sung, Young Choi, Gyeong Hee Cho, Chin Youb Chung, Moon Seok Park, Kyoung Min Lee
OBJECTIVE: This study evaluated the correlation between central and peripheral bone mineral density (BMD) of the ankle joint, using dual-energy X-ray absorptiometry (DXA). We also investigated whether peripheral ankle BMD could be used to identify individuals who were diagnosed with osteoporosis, using central DXA. METHODS: We recruited 134 volunteers aged 20-90 years who agreed to participate in this study. Central BMD of the lumbar spine and left femur, and peripheral BMD of the medial malleolus, distal tibia, lateral malleolus, and talus were measured with DXA...
February 5, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29403245/machined-cervical-interfacet-allograft-spacers-for-the-management-of-atlantoaxial-instability
#4
Mazda K Turel, Mena G Kerolus, Vincent C Traynelis
Background: The use of cervical interfacet spacers (CISs) to augment stability and provide solid arthrodesis at the atlantoaxial joint has not been studied in detail. The aim of this work is to report the outcomes with the use of machined allograft CISs at C1-2. Methods: A retrospective review of 19 patients who underwent an atlantoaxial fusion with the use of CISs was performed. All patients had instability documented with flexion and extension lateral radiographs...
October 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29391300/incidence-and-risk-factors-for-facet-joint-violation-in-open-versus-minimal-invasive-procedure-during-pedicle-screw-placement-in-trauma-patients
#5
Christian Herren, Marly Reijnen, Miguel Pishnamaz, Philipp Lichte, Hagen Andruszkow, Sven Nebelung, Jan Siewe, Frank Hildebrand, Philipp Kobbe
A possible risk factor for premature facet joint degeneration or adjacent segment degeneration after surgical treatment of spine fractures is facet joint violation (FV) during insertion of pedicle screws. Hence, the study aim was to determine risk factors for FV in the thoracic and lumbar spine following minimal-invasive screw insertion (MIS) or open instrumentation (OI). A retrospective analysis of all patients with spine fractures requiring posterior stabilization was performed. After allocation to the thoracic / lumbar group, FV was defined as an involvement due to the positioning of a pedicle screw and its severity as determined by computed tomography was assessed by using a customized scoring system...
January 29, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29370057/analysis-of-isolated-transverse-process-fractures-sustained-during-blast-related-events
#6
Nicolas Newell, A Phillip Pearce, Edward Spurrier, Iain Gibb, Claire E Webster, Spyros D Masouros, Jonathan C Clasper
BACKGROUND: A range of devastating blast injuries have been sustained by personnel during recent conflicts. Previous studies have focused on severe injuries, including to the spine, however, no study has specifically focused on the most common spinal injury; transverse process (TP) fractures. Although their treatment usually requires limited intervention, analysis of TP fractures may help determine injury mechanisms. METHODS: Data was collected from victims with spinal fractures injured in Improvised Explosive Device (IED) attacks, from the UK's Joint Theatre Trauma Registry...
January 24, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29362154/model-for-improved-correlation-of-bmd-values-between-abdominal-routine-dual-energy-ct-data-and-dxa-scans
#7
Mischa Woisetschläger, Anna Spångeus
BACKGROUND: Osteoporosis is a common but underdiagnosed and undertreated disease causing severe morbidity and economic burden. The gold standard for detection of osteoporosis is DXA (dual energy x-ray absorptiometry), which is a dedicated examination for osteoporosis. Dual energy CT (DECT) examinations are increasingly used in daily routine for a wide variety of diagnoses. In the present study, we wanted to examine whether vBMD (volume bone mass density) could be evaluated as a side product in non-contrast as well as contrast phases as well as to evaluate a correction model taking known shortcomings for DXA into account...
February 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29352436/posterolateral-tibial-plateau-fractures-how-to-buttress-reversed-l-posteromedial-or-the-posterolateral-approach-a-comparative-cadaveric-study
#8
Wich Orapiriyakul, Theerachai Apivatthakakul, Chanakarn Phornphutkul
INTRODUCTION: The selection of a surgical approach for buttressing posterolateral tibial plateau fractures is controversial. OBJECTIVE: This study compared the surgical exposure area between the reversed L posteromedial approach (R-PM) and the posterolateral (PL) approach using the lateral plateau width as a metric. MATERIALS AND METHODS: Twenty lower extremities from fresh frozen cadavers were included. The R-PM approach was used first and the boundary of the posterior tibial cortex exposure was marked with metal pins...
January 19, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29350009/-etiological-analysis-preventional-and-therapeutical-strategies-for-the-unsatisfied-cervical-posterior-decompression-surgery
#9
De-An Qin, Xiao-Guang Liu, Feng-Liang Wu, Zhong-Jun Liu, Feng-Shan Zhang, Yu Sun
OBJECTIVE: To discuss the causes of unsatisfied cervical posterior decompression surgery and describe the overhauling strategies and precaution. METHODS: The clinical data of 14 patients required revision surgery were retrospectively analyzed, and these patients with unsatisfied effects were due to cervical posterior decompression surgery from January 2012 to December 2014. Overhauling reasons were analyzed and then different revision procedures were performed. The functions of cervical cord and ambulation were evaluated respectively by modified Japanese Orthopedic Association(mJOA) score and Nurick grade according to the course order:preoperative for the first time, pre-revision and at final follow-up...
February 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29222205/novel-use-of-a-trabecular-metal-spacer-in-the-treatment-of-a-long-standing-ulnar-fracture-non-union
#10
Oluwatobi O Onafowokan, Julian S H Gaskin, Rory G Middleton, Mark R Norton
The use of trabecular metal (TM) implants in spine and joint surgery is well documented. However, their use has yet to be reported as an alternative to either allograft or autograft in the management of fracture non-unions. We present our experience in using a TM implant for treating a patient with a long-standing ulnar fracture non-union. Excision of devitalised bone resulted in a 17 mm defect which the TM implant was used to infill. The defect was then bridged with a locking plate. At 2-year clinical and radiographic review, bony union and a pain-free return to full function was noted...
December 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29206797/instability-of-the-hip-joint-after-posterior-acetabular-wall-fracture-independent-risk-factors-remain-elusive
#11
Jay H Patel, Berton R Moed
BACKGROUND: Exact determinants of hip instability have not been established for fractures of the posterior wall of the acetabulum involving ≤50% of the wall. Therefore, examination of the hip under anesthesia (EUA) is routinely performed. Recently, the superior exit point of the fracture has been reported to be an important identifiable risk factor. Pre-existing adult hip dysplasia (developmental dysplasia of the hip [DDH]) is thought to have a similar role. The purpose of this study was to determine if any known radiographic measurements and signs associated with DDH, or any fracture characteristics, are independent risk factors for hip instability after fracture of the posterior wall of the acetabulum...
December 6, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29184051/clinical-efficacy-of-anterior-partial-corpectomy-and-titanium-mesh-fusion-and-internal-fixation-for-treatment-of-old-fracture-dislocation-of-the-lower-cervical-spine
#12
De-Chao Miao, Bao-Yang Zhang, Tao Lei, Yong Shen
BACKGROUND The aim of this study was to analyze the clinical features and to evaluate the efficacy of anterior partial corpectomy and titanium mesh fusion and internal fixation of old fracture dislocation of the lower cervical spine. MATERIAL AND METHODS We retrospectively analyzed the clinical data of 52 patients with old lower cervical fracture and dislocation treated with anterior partial corpectomy and titanium mesh fusion fixation between January 2008 and December 2013, with a mean follow-up period of 4...
November 29, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29181358/a-case-report-upper-thoracic-chance-fracture-with-monoplegia%C3%A2-an-unusual-presentation
#13
Ketan Shripad Khurjeka, Himanshu Gurunath Kulkarni, Shailesh Hadgaonkar, Ajay Kothari, Ashok Shyam, Parag Sancheti
Introduction: Chance fractures, the horizontal splitting vertebral fractures caused by flexion distraction mechanism, are inherently unstable fractures. These fractures can land up with significant visceral injuries. There are most commonly seen at thoracolumbar junction or in lumbar spine due to their high mobility. These fractures are extremely rare in the thoracic spine due to the rigidity of thoracic spine rendered by attachment of ribs. Furthermore, the level of injury makes neurological complications even graver...
July 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29155868/tocilizumab-potentially-prevents-bone-loss-in-patients-with-anticitrullinated-protein-antibody-positive-rheumatoid-arthritis
#14
Yi-Ming Chen, Hsin-Hua Chen, Wen-Nan Huang, Tsai-Ling Liao, Jun-Peng Chen, Wen-Cheng Chao, Ching-Tsai Lin, Wei-Ting Hung, Chia-Wei Hsieh, Tsu-Yi Hsieh, Yi-Hsing Chen, Der-Yuan Chen
Rheumatoid arthritis (RA) is associated with a high risk of osteoporosis and fracture. Interleukin (IL)-6 inhibitors may suppress osteoclast activation. Anticitrullinated protein antibody (ACPA) titers are inversely associated with bone mineral density (BMD). However, the differential effect of ACPA on bone turnover marker (BTM) and BMD changes after IL-6 inhibition remains unclear. This prospective study recruited patients with active RA with inadequate response to methotrexate or biologics. BMD was measured before and after 2-year tocilizumab (TCZ) treatment...
2017: PloS One
https://www.readbyqxmd.com/read/29145978/outpatient-management-of-ankle-fractures
#15
REVIEW
Charles Qin, Robert G Dekker, Mia M Helfrich, Anish R Kadakia
Interest in outpatient orthopedic surgery has been fueled by provider desire to control costs and development of rapid recovery protocols. Open reduction and internal fixation (ORIF) is a commonly elected treatment strategy for ankle fracture that may be performed in an outpatient setting. Lessons on cost-savings of the outpatient model in orthopedics can be learned in total joint replacement and spine surgery. Moreover, in properly selected patients, outpatient ORIF has been shown to be comparably safe. Reasons for admission of the surgically managed patient with ankle fractures, including concern for surgical delay and additional social factors, warrant further investigation...
January 2018: Orthopedic Clinics of North America
https://www.readbyqxmd.com/read/29137106/trabecular-bone-score-as-a-supplementary-tool-for-the-discrimination-of-osteoporotic-fractures-in-postmenopausal-women-with-rheumatoid-arthritis
#16
Yong Jun Choi, Yoon-Sok Chung, Chang-Hee Suh, Ju-Yang Jung, Hyoun-Ah Kim
Rheumatoid arthritis (RA) is a risk factor for bone fragility, and its effect on fracture risk is independent of bone mineral density (BMD). The trabecular bone score (TBS) is a new indirect parameter of bone quality. In this study, BMD and the TBS were compared between female postmenopausal RA patients with and those without vertebral fractures (VFs).This study had a cross-sectional design. Two hundred seventy-nine postmenopausal women with RA aged 50 years or older were included in this study. TBS measurements were performed on the same vertebrae as those for the BMD measurements...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29130656/-design-of-minimal-invasive-screw-on-posterior-pelvis-ring-and-pelvic-finite-element-analysis
#17
Fan Tang, Li Min, Yan-Ling Wang, Bo Qu, Yong Zhou, Yi Luo, Wen-Li Zhang, Rui Shi, Hong Duan, Chong-Qi Tu
OBJECTIVE: To design minimal invasive screw on posterior pelvic ring and perform threedimensional finite element analysis based on a pelvis finite element model. METHODS: We measured the pelvic anatomical data of 20 healthy volunteers and identified potential designs for minimal invasive screw on posterior pelvic ring. A finite element model of pelvis was then established. Threedimensional finite element analyses were performed under static and dynamic mechanical loading,respectively...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29113245/temporomandibular-dislocation-caused-by-pancreatic-cancer-metastasis-a-case-report
#18
Shinpei Matsuda, Hitoshi Yoshimura, Sadahiko Kondo, Kazuo Sano
Metastasis-induced dislocation of the temporomandibular joint (TMJ) is rare. The present study describes a case of TMJ dislocation caused by metastasis from pancreatic cancer, and discusses this in the context of literature on occlusal abnormality and/or dislocation due to metastasis. In the present case, unilateral TMJ dislocation was suspected when the patient first presented; destructive bone changes were not observed on conventional radiographs, and magnetic resonance imaging (MRI) revealed a tumorous lesion...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29110219/reduction-and-fixation-of-displaced-u-shaped-sacral-fractures-using-lumbopelvic-fixation-technical-recommendations
#19
Stefan Piltz, Bianka Rubenbauer, Wolfgang Böcker, Heiko Trentzsch
PURPOSE: U-shaped sacral fractures are extremely rare injuries that usually occur as a result of falls from considerable heights. Almost all treatment methods described to date aim solely at stabilizing the fracture but do not contribute to supporting the reduction of such fractures. Using existing implants the purpose of this study is to present a surgical technique that facilitates both the reduction and the stabilization of these injuries. The presented technique was evaluated in a series of three cases...
November 6, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29099886/risk-of-osteoporotic-fracture-after-steroid-injections-in-patients-with-medicare
#20
Leah Y Carreon, Kevin L Ong, Edmund Lau, Steven M Kurtz, Steven D Glassman
To further evaluate the relationship between steroid injections and osteoporotic fracture risk, we analyzed Medicare administrative claims data on both large-joint steroid injections (LJSIs) into knee and hip and transforaminal steroid injections (TSIs), as well as osteoporotic hip and wrist fractures. Our hypothesis was that a systemic effect of steroid injections would increase fracture risk in all skeletal locations regardless of injection site, whereas a local effect would produce a disproportionate increased risk of spine fracture with spine injection...
September 2017: American Journal of Orthopedics
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