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Search Results: 1 - 10 of 752 matches for " lumbar vertebrae "
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Estudo morfométrico do pedículo das vértebras lombares
Defino, Helton Luiz Aparecido;Vendrame, José Roberto Benites;
Acta Ortopédica Brasileira , 2007, DOI: 10.1590/S1413-78522007000400001
Abstract: a morphometric study was performed on ten lumbar spine fragments from adult cadavers of both genders in order to study parameters related to lumbar spine pedicles' morphometry. the pedicles were cross-sectioned on both sides at the level of their smallest diameter. vertebrae were photographed and the morphometric study was conducted using a minimop instrument. the following parameters were bilaterally assessed: pedicle shape and diameter, cortical walls thickness, pedicle area, cortical bone area, spongy bone area, and percentage of spongy and cortical bone of the pedicle. the vertebral pedicle of the lumbar spine has an oval shape, its vertical diameter is larger than its horizontal diameter, the medial cortical bone wall is thicker, the area of the pedicle increases towards skull-tail, and the cortical and spongy bone areas ratio is constant throughout the extension of the lumbar spine.
Análise fotoelástica de um modelo de vértebra humana com parafuso pedicular
Siqueira, Dayana Pousa Paiva de;Fakhouri, Sarah Fakher;Araújo, Cleudmar Amaral de;Defino, Helton Luiz Aparecido;Shimano, Ant?nio Carlos;
Acta Ortopédica Brasileira , 2009, DOI: 10.1590/S1413-78522009000300004
Abstract: introduction: the vertebrae fixation system using pedicular screws is one of the most efficient methods to treat vertebral spine pathologies. when the screw is submitted to pullout strength, it causes internal tension near the medullar canal and this situation can be analyzed by using the photoelasticity technique. objective: were analyzed those internal tensions near the medullar canal of photoelastic vertebra models using different sizes of screws of the vertebral fixation system submitted to pullout strength. methods: a lumbar vertebral model made of photoelastic material with three different uss1-type pedicular screw sizes (5, 6, and 7mm) was used. the internal tensions around the screw were tested in 12 predetermined points by a plain transmission polaroscope. results: the areas of greater tension concentration were between the medullar canal and the curves of the transverse process. comparing the maximum average pulling tension, statistical differences were observed between screws 5 and 7, and 6 and 7. on the other hand, for screws 5 and 6, there were no significant differences. conclusion: the study evidenced that the internal tensions are greater in irregular areas, next to the medullar canal, showing that this is a critical region.
Clasificación de las fracturas toracolumbares: comparación entre las clasificaciones de AO y Vaccaro
Bazán, Pedro Luis;Borri, Alvaro Enrique;Torres, Piscinis Ulises;Cosentino, Juan Sebastián;Games, Martin Honorio;
Coluna/Columna , 2010, DOI: 10.1590/S1808-18512010000200013
Abstract: objective: the classifications have changed in the last half century; the most used from the last decade is classification ao. in 2004, vaccaro et al. proposed the thoraco-lumbar injury classification and severity score (tlics). methods: one analysis of the inter and intra observant reproduction by using the kappa test, of the two classifications between three different levels from orthopedic surgeons in formation in 30 cases. results: the intraobservant reproduction in the classification of vaccaro was: oi: 0.73; oii: 0.6, and oiii: 0.63. for the ao classification: 0.7; 0.7 and 0.6, respectively. between the two classifications: oi: 0.59; oii: 0.7, and oiii: 0.62. the interobservant evaluation for the classification of vaccaro is 0.66 and for ao classification was 0.67. the tactically important points were rotation and injuries of the later ligamentary complex. conclusions: the two classifications show a good degree in agreement (kappa index). with the vaccaro, it has been observed a global agreement of 69%. regarding the indication of orthopedic treatment, the agreement was 37%. in the surgical treatment indication, it was 29%. it is possible to remark that this classification has a vague level where it can be decided on any of the two treatments (tlics 4). this was observed in 3%. there was no agreement in 31%. the same indications for classification ao presented a global agreement of 67%. for the orthopedic indication, it was 32%. a surgical indication was made in 21%. in the injuries classified as a3 (14%) about the treatment is not defined with unanimity between the observers.
Avalia??o tomográfica do posicionamento de parafusos pediculares em deformidades na coluna torácica e lombar introduzidos com base na técnica "free hand"
Giubilei, Dante Bernardes;Cavali, Paulo Tadeu Maia;Lehoczki, Maurício Antonelli;Rossato, Alexander Junqueira;Risso-Neto, Marcelo Italo;Zuiani, Guilherme Rebechi;Veiga, Ivan Guidolin;Pasqualini, Wagner;Landim, élcio;
Coluna/Columna , 2011, DOI: 10.1590/S1808-18512011000400015
Abstract: objective: to evaluate the placement of pedicle screws in the vertebrae of the thoracic and lumbar spine in patients with scoliosis using the"free hand" technique. methods: evaluation of ct scans of 284 pedicle screws in 15 patients (seven men and eight women) aged between 12 and 39 years (mean 16.7 years) with scoliosis. the screws were inserted from t2 to s1 for the following conditions: two congenital scoliosis and 13 neuromuscular, to evaluate the placement of screws in relation to the walls of pedicles. results: regarding the cortical pedicle screws, 244 (86%) were positioned between the cortical or just touching it. lateral cortical lesion was seen in 16 screws and medial cortex lesion in 13 screws, being greater the number of violations in the thoracic vertebrae. conclusion: the use of pedicle screw instrumentation in thoracic and lumbar vertebrae for scoliosis proved safe and effective when applied to different levels with the "free hand" technique. in the thoracic vertebrae, the pedicular cortical violations were more frequent, but did not impair the stability of fixation and did not injure the neural, vascular and visceral structures.
Eros?o de corpo de vértebra lombar devido à aneurisma de aorta abdominal
Feitosa, Eliane Alencar do Nascimento;Alves, Remy Faria;Dias, Rodrigo Sim?es Lemos;Silva, Rossi Murilo da;
Acta Cirurgica Brasileira , 1999, DOI: 10.1590/S0102-86501999000400008
Abstract: in this case report there is a patient with erosion of the fourth lumbar (l4) vertebra due to an infrarenal abdominal aorta aneurysm, which was treated at the souza aguiar municipal hospital - rio de janeiro. the patient is a 51-year-old male, who has had back pain for about four years and a pulsating abdominal tumor. after the clinical examination, an abdominal computed tomography (ct) scan was carried out which showed a tortuous abdominal aorta with an infrarenal dilation of 8.5 cm in diameter and 3.0 cm of lumen. the ct scan also showed erosion of the fourth lumbar vertebra. the treatment consisted of aneurysmectomy of the abdominal aorta whith interposition of a tubular prosthetic graft (dacron uni-graft? 24 mm). there were no complications in the postoperative follow-up.
Morphometric substantiation of a fixation method choice at surgical correction of spondylolisthesis
Anisimova Е.А.,Nikolenko V.N.,Ostrovsky V.V.,Toma A.I.
Saratov Journal of Medical Scientific Research , 2010,
Abstract: The purpose was to reveal patterns of morphometric characteristics variability of lumbar vertebrae and sacrum for a choice of more adequate selection of standard sizes and introduction orientation of corrigent metalware at surgical treatment of spondylolisthesis. Preparations of lumbar vertebrae and sacrum of 60 skeletons, 110 Kt-grams of men and women of the first and second periods of mature age without visible pathology of a backbone and 300 Kt-grams of patients with spondylolisthesis. The data on age variability and sexual dimorphism of lumbar vertebrae and sacrum were obtained. The analysis of results of surgical treatment of 288 patients with spondylolisthesis during 1995-2008 was carried out. 160 patients were managed with preoperative planning, taking into account morphometric characteristics of vertebrae and sacrum since 2003. It is necessary to install and arrange metalware at reduction taking into account features of back structures and forward basic complex of lumbar vertebrae and sacrum; that allows to receive adequate decompression of neurovascu-lar structures in 85-90% cases, reliable correction and stabilization of damaged lumbosacral segments
Análise comparativa de técnicas de fixa??o para fraturas da coluna toracolombar
Hübner, André Rafael;Azevedo, Vinicius Gon?alves de;Martins, Marcel;Suárez, álvaro Diego Heredia;Carneiro, Marlon Ferreira;Ribeiro, Marcelo;Spinelli, Leandro de Freitas;
Coluna/Columna , 2011, DOI: 10.1590/S1808-18512011000400004
Abstract: objective: the study evaluates patients affected by thoracolumbar fractures, and treated by posterior instrumentation and arthrodesis. a comparative analysis of two different fixation techniques using pedicle screw fixation associated with short and long instrumentation were carried out. methods: patients evaluation were performed by pain scale (vas, visual analog scale), functional scale (oswestry) and by clinical and radiographic criteria. result: it was observed 70.3% men and 29.7% women, with mean age of 43 years and average follow-up of 39 months. most patients had frankel e grade at the time of data collection (83.8%). the majority of patients had a3 (63.6%) fractures at l1 (51.4%). short instrumentation was performed in 62.2% of cases. an average of 2.7 on the pain scale and 11.2 for the owestry was obtained in the analysis. conclusion: evaluation of techniques did not present any statistically significance.
Fratura toracolombar explos?o: correla??o entre o comprometimento do canal vertebral e os resultados do tratamento conservador
Avanzi, Osmar;Landin, Elcio;Meves, Robert;Caffaro, Maria Fernanda Silber;Bortoli, Juliano de;
Coluna/Columna , 2009, DOI: 10.1590/S1808-18512009000100010
Abstract: introduction: there has been considerable controversy regarding what constitutes the best treatment for lumbar burst fractures without neurological compromise. the percentage of spinal canal compromise has been used as a parameter of surgical indication, but its significance in patients without neurological deficit remains uncertain. objective: the purpose of this study was to evaluate patients with thoracolumbar burst fractures correlating the initial percentage of spinal canal compromise and the clinical results of the conservative treatment. methods: we have retrospectively evaluated the clinical records, radiographs and ct scans of adult patients with thoracolumbar burst fractures including the levels of t11 to l2, a3 type of magerl's classification with less than 10 days of evolution, submitted to conservative treatment with tlso (jewett) or hyperextension plaster. a questionnaire was also applied including the visual analog pain scale (vas), denis work and pain scale, oswestry index and the quality of life assessment questionnaire sf-36. results: it was not found correlation between the percentage of spinal compromise and the vas or the denis pain scale. negative correlation was found between the percentage of spinal canal compromise and the denis work scale. negative correlation was also found between the oswestry index and the percentage of spinal canal compromise, indicating that patients with higher disability scores presented less percentage of spinal canal stenosis. in the correlation analysis between the sf-36 values and the percentage of spinal canal stenosis, significant correlation was found only with the physical functioning domain, suggesting that the patients with best physical function also presented higher percentage of stenosis. conclusion: the obtained results confirm the absence of correlation between higher percentages of spinal canal compromise and worse clinical results as described in literature.
Importancia do índice Anat?mico de Gravidade do Trauma no manejo das fraturas toracolombares do tipo explos?o
Rezende, Rodrigo;Avanzi, Osmar;
Revista do Colégio Brasileiro de Cirurgi?es , 2009, DOI: 10.1590/S0100-69912009000100004
Abstract: objectives: there are few publications which relate the injury severity score (iss) to the thoracolumbar burst fractures. for that reason and for the frequency in which they occur, we have evaluated the severity of the trauma in these patients. methods: we have evaluated 190 burst fractures in the spinal cord according to denis, using the codes of abbreviated injury scales (ais) for the calculation of the iss, which uses the three parts of the human body with major severity. these lesions are a squared number and the results are summed up. results: among 190 cases evaluated, the median value of the iss was 13 and the average was 14,4. males presented a higher iss than females. the young adult patients presented an average and a median value of the iss higher than the old patients. the higher the iss is, the longer the hospitalization period is, except for the patients with the iss over 35. the fractures in thoracic level show the iss higher than the rest. the iss is directly related to surgical treatment and mortality. conclusion: the iss values which were found show that a less severe trauma can cause a burst thoracic or lumbar spinal cord fracture. the value of the iss has not shown correlation to the sex and the fracture level, but it is proportional to the hospitalization period, the surgical treatment and the mortality rate. this result shows a value which is inversely proportional to the age of the patients.
Jitendra Gupta*, Manish Patil, Ashutosh Chourishi
International Journal of Bioassays , 2012,
Abstract: The need for a quantitative data base for geometrical and mechanical models of the vertebral column is expressed often by researchers and practitioners, but no comprehensive anthropometric survey for spinal segment modeling has been published. The purpose of this paper is to present a set of anthropometric measurements on dried cadaveric lumbar vertebrae. This includes statistical analysis for distributions of the various dimensions, relations and correlations of vertebral dimensions. The Present study was conducted on 210 adult lumbar vertebrae in department of Anatomy, R.D. Gardi Medical College, Ujjain, India. The Height, length, width of vertebral body, of lumbar vertebrae were measured with the help of Sliding Vernier Caliper. There was a gradual increase in the transverse diameter of the body of vertebra from L 1-L 5. There was also a- increase in the antero- posterior diameter from L 1 to L5.
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