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Donghun Kang - One of the best experts on this subject based on the ideXlab platform.
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multiple spinous process fractures of the Thoracic Vertebrae clay shoveler s fracture in a beginning golfer a case report
Spine, 2009Co-Authors: Donghun KangAbstract:Study Design. A case report. Objective. The authors report a unique experience with a 40-year-old male beginning golfer who presented with multiple isolated spinous process fractures of the upper Thoracic spine. Summary of Background Data. Stress fractures are caused by repetitive loading and overuse, and they account for 10% of all sports-related injuries. Fractures of isolated spinous processes of the cervical and Thoracic Vertebrae are referred to as Clay-Shoveler’s fractures, and there is little clinical information on these injuries. Methods. A 40-year-old man was admitted to our clinic with a 2-week history of posterior neck pain that radiated bilaterally into the shoulder area. Radiograph findings were normal. However, with a suspicion of fracture due to severe tenderness in the upper Thoracic area, we performed three-dimensional cervicoThoracic spine computed tomography and magnetic resonance imaging, which revealed multiple spinous process fractures at upper Thoracic Vertebrae. Results. Conservative treatment was administered, and immobilization was maintained for more than 4 weeks. He has been symptom-free for more than 6 months. Conclusion. Although stress fractures of the spinous process are very rare and can be overlooked in clinical settings, they should be considered in the differential diagnosis of severe dorsal neck pain in golfers, especially beginners.
Christopher J Hernandez - One of the best experts on this subject based on the ideXlab platform.
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Trabecular Microarchitecture of Hominoid Thoracic Vertebrae
Anatomical Record-advances in Integrative Anatomy and Evolutionary Biology, 2009Co-Authors: Meghan M. Cotter, Scott W. Simpson, Bruce Latimer, Christopher J HernandezAbstract:Spontaneous vertebral fractures are a common occurrence in modern humans, yet these fractures are not documented in other hominoids. Differences in vertebral bone strength between humans and apes associated with trabecular bone microarchitecture may contribute to differences in fracture incidence. We used microcomputed tomography to examine trabecular bone microarchitecture in the T8 vertebra of extant young adult hominoids. Scaled volumes of interest from the anterior vertebral body were analyzed at a resolution of 46 lm, and bone volume fraction, trabecular thickness, trabecular number, trabecular separation, structure model index, and degree of anisotropy were compared among species. As body mass increased, so did trabecular thickness, but bone volume fraction, structure model index, and degree of anisotropy were independent of body mass. Bone volume fraction was not significantly different between the species. Degree of anisotropy was not significantly different among the species, suggesting similarity of loading patterns in the T8 vertebra due to similar anatomical and postural relationships within each species’ spine. Degree of anisotropy was negatively correlated with bone volume fraction (r 2 ¼ 0.85, P < 0.05) in humans, whereas the apes demonstrated no such relationship. This suggested that less dense human trabecular bone was more preferentially aligned to habitual loading. Furthermore, we theorize that trabeculae in ape Thoracic Vertebrae would not be expected to become preferentially aligned if bone volume fraction was decreased. The differing relationship between bone volume fraction and degree of anisotropy in humans and apes may cause less dense human bone to be more fragile than less dense ape bone. Anat Rec, 292:1098– 1106, 2009. V C 2009 Wiley-Liss, Inc.
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Biomechanical allometry in hominoid Thoracic Vertebrae.
Journal of human evolution, 2009Co-Authors: Christopher J Hernandez, Meghan M. Cotter, David Arthur Loomis, A.l. Schifle, L.c. Anderson, L. Elsmore, C. Kunos, Bruce LatimerAbstract:Abstract Considerable differences in spinal morphology have been noted between humans and other hominoids. Although comparative analyses of the external morphology of Vertebrae have been performed, much less is known regarding variations in internal morphology (density) and biomechanical performance among humans and closely related non-human primates. In the current study we utilize density calibrated computed tomography images of Thoracic vertebral bodies from hominoids ( n = 8–15 per species, human specimens 20–40 years of age) to obtain estimates of vertebral bone strength in axial compression and anteroposterior bending and to determine how estimates of strength scale with animal body mass. Our biomechanical analysis suggests that the strength of Thoracic vertebral bodies is related to body mass (M) through power law relationships (y ∝ M b ) in which the exponent b is 0.89 (reduced major axis) for prediction of axial compressive strength and is equal to 1.89 (reduced major axis) for prediction of bending strength. No differences in the relationship between body mass and strength were observed among hominoids. However, Thoracic Vertebrae from humans were found to be disproportionately larger in terms of vertebral length (distance between cranial and caudal endplates) and overall vertebral body volume (p
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Trabecular Microarchitecture of Hominoid Thoracic Vertebrae
Anatomical record (Hoboken N.J. : 2007), 2009Co-Authors: Meghan M. Cotter, Scott W. Simpson, Bruce Latimer, Christopher J HernandezAbstract:Spontaneous vertebral fractures are a common occurrence in modern humans, yet these fractures are not documented in other hominoids. Differences in vertebral bone strength between humans and apes associated with trabecular bone microarchitecture may contribute to differences in fracture incidence. We used microcomputed tomography to examine trabecular bone microarchitecture in the T8 vertebra of extant young adult hominoids. Scaled volumes of interest from the anterior vertebral body were analyzed at a resolution of 46 microm, and bone volume fraction, trabecular thickness, trabecular number, trabecular separation, structure model index, and degree of anisotropy were compared among species. As body mass increased, so did trabecular thickness, but bone volume fraction, structure model index, and degree of anisotropy were independent of body mass. Bone volume fraction was not significantly different between the species. Degree of anisotropy was not significantly different among the species, suggesting similarity of loading patterns in the T8 vertebra due to similar anatomical and postural relationships within each species' spine. Degree of anisotropy was negatively correlated with bone volume fraction (r(2) = 0.85, P < 0.05) in humans, whereas the apes demonstrated no such relationship. This suggested that less dense human trabecular bone was more preferentially aligned to habitual loading. Furthermore, we theorize that trabeculae in ape Thoracic Vertebrae would not be expected to become preferentially aligned if bone volume fraction was decreased. The differing relationship between bone volume fraction and degree of anisotropy in humans and apes may cause less dense human bone to be more fragile than less dense ape bone.
Lisa Tartaglino - One of the best experts on this subject based on the ideXlab platform.
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Approaching the upper Thoracic Vertebrae without sternotomy or thoracotomy: a radiographic analysis with clinical application.
Spine, 2000Co-Authors: Ashwini Sharan, Gregory J. Przybylski, Lisa TartaglinoAbstract:Study Design. The distribution of the lowest vertebra tangential to the suprasternal notch and the lowest intervertebral disc visualized above the sternum was determined on magnetic resonance imaging (MRI) studies. The method is illustrated in seven patients undergoing upper Thoracic spinal reconstruction to define a surgical approach without sternotomy or thoracotomy. Objectives. The relation of the sternal notch to Thoracic Vertebrae was examined by MRI to estimate the Thoracic level approachable anteriorly without sternotomy. Summary of Background Data. Upper Thoracic spine (T1–T4) visualization is considered difficult. The Thoracic Vertebrae that can be visualized anteriorly without sternotomy is unknown. Methods. The vertebral level tangential to the suprasternal notch and the lowest intervertebral disc visualized in its entirety above the sternum was determined from 106 consecutive midsagittal cervicoThoracic MRI studies. The method was evaluated in seven patients to illustrate application of a low suprasternal, lateral extracavitary, or transpedicular approach to performing upper Thoracic reconstruction. Results. The midportion of the T3 vertebra is often above the sternal notch, whereas the trajectory of the T1–T2 intervertebral disc is usually rostral to the sternum. All four patients with disease above the sternal notch on MRI underwent a low left suprasternal approach, whereas three others were treated with a lateral extracavitary or transpedicular approach. No patient worsened neurologically and all ambulated independently after surgery. Conclusions. Upper Thoracic Vertebrae can be exposed without sternotomy or thoracotomy by a low left suprasternal approach. Midsagittal cervicoThoracic MRI can identify the Thoracic Vertebrae above the sternum, thereby determining whether a low suprasternal approach is feasible. Otherwise, a lateral extracavitary or transpedicular approach can be used to avoid sternotomy or thoracotomy.
Bruce Latimer - One of the best experts on this subject based on the ideXlab platform.
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Trabecular Microarchitecture of Hominoid Thoracic Vertebrae
Anatomical Record-advances in Integrative Anatomy and Evolutionary Biology, 2009Co-Authors: Meghan M. Cotter, Scott W. Simpson, Bruce Latimer, Christopher J HernandezAbstract:Spontaneous vertebral fractures are a common occurrence in modern humans, yet these fractures are not documented in other hominoids. Differences in vertebral bone strength between humans and apes associated with trabecular bone microarchitecture may contribute to differences in fracture incidence. We used microcomputed tomography to examine trabecular bone microarchitecture in the T8 vertebra of extant young adult hominoids. Scaled volumes of interest from the anterior vertebral body were analyzed at a resolution of 46 lm, and bone volume fraction, trabecular thickness, trabecular number, trabecular separation, structure model index, and degree of anisotropy were compared among species. As body mass increased, so did trabecular thickness, but bone volume fraction, structure model index, and degree of anisotropy were independent of body mass. Bone volume fraction was not significantly different between the species. Degree of anisotropy was not significantly different among the species, suggesting similarity of loading patterns in the T8 vertebra due to similar anatomical and postural relationships within each species’ spine. Degree of anisotropy was negatively correlated with bone volume fraction (r 2 ¼ 0.85, P < 0.05) in humans, whereas the apes demonstrated no such relationship. This suggested that less dense human trabecular bone was more preferentially aligned to habitual loading. Furthermore, we theorize that trabeculae in ape Thoracic Vertebrae would not be expected to become preferentially aligned if bone volume fraction was decreased. The differing relationship between bone volume fraction and degree of anisotropy in humans and apes may cause less dense human bone to be more fragile than less dense ape bone. Anat Rec, 292:1098– 1106, 2009. V C 2009 Wiley-Liss, Inc.
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Biomechanical allometry in hominoid Thoracic Vertebrae.
Journal of human evolution, 2009Co-Authors: Christopher J Hernandez, Meghan M. Cotter, David Arthur Loomis, A.l. Schifle, L.c. Anderson, L. Elsmore, C. Kunos, Bruce LatimerAbstract:Abstract Considerable differences in spinal morphology have been noted between humans and other hominoids. Although comparative analyses of the external morphology of Vertebrae have been performed, much less is known regarding variations in internal morphology (density) and biomechanical performance among humans and closely related non-human primates. In the current study we utilize density calibrated computed tomography images of Thoracic vertebral bodies from hominoids ( n = 8–15 per species, human specimens 20–40 years of age) to obtain estimates of vertebral bone strength in axial compression and anteroposterior bending and to determine how estimates of strength scale with animal body mass. Our biomechanical analysis suggests that the strength of Thoracic vertebral bodies is related to body mass (M) through power law relationships (y ∝ M b ) in which the exponent b is 0.89 (reduced major axis) for prediction of axial compressive strength and is equal to 1.89 (reduced major axis) for prediction of bending strength. No differences in the relationship between body mass and strength were observed among hominoids. However, Thoracic Vertebrae from humans were found to be disproportionately larger in terms of vertebral length (distance between cranial and caudal endplates) and overall vertebral body volume (p
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Trabecular Microarchitecture of Hominoid Thoracic Vertebrae
Anatomical record (Hoboken N.J. : 2007), 2009Co-Authors: Meghan M. Cotter, Scott W. Simpson, Bruce Latimer, Christopher J HernandezAbstract:Spontaneous vertebral fractures are a common occurrence in modern humans, yet these fractures are not documented in other hominoids. Differences in vertebral bone strength between humans and apes associated with trabecular bone microarchitecture may contribute to differences in fracture incidence. We used microcomputed tomography to examine trabecular bone microarchitecture in the T8 vertebra of extant young adult hominoids. Scaled volumes of interest from the anterior vertebral body were analyzed at a resolution of 46 microm, and bone volume fraction, trabecular thickness, trabecular number, trabecular separation, structure model index, and degree of anisotropy were compared among species. As body mass increased, so did trabecular thickness, but bone volume fraction, structure model index, and degree of anisotropy were independent of body mass. Bone volume fraction was not significantly different between the species. Degree of anisotropy was not significantly different among the species, suggesting similarity of loading patterns in the T8 vertebra due to similar anatomical and postural relationships within each species' spine. Degree of anisotropy was negatively correlated with bone volume fraction (r(2) = 0.85, P < 0.05) in humans, whereas the apes demonstrated no such relationship. This suggested that less dense human trabecular bone was more preferentially aligned to habitual loading. Furthermore, we theorize that trabeculae in ape Thoracic Vertebrae would not be expected to become preferentially aligned if bone volume fraction was decreased. The differing relationship between bone volume fraction and degree of anisotropy in humans and apes may cause less dense human bone to be more fragile than less dense ape bone.
Zheng Zhi-he - One of the best experts on this subject based on the ideXlab platform.
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One-stage posterior total vertebral resection in treatment of Thoracic Vertebrae tumor and tuberculosis
Orthopedics, 2011Co-Authors: Zheng Zhi-heAbstract:Objective To investigate the curative effect and superiority of one stage posterior total vertebral resection and internal fixator with pedicle of vertebral arch nail in the treatment of Thoracic Vertebrae tumor and tuberculosis.Methods From January 2009 to June 2010,five patients with Thoracic Vertebrae tumors were treated by the posterior total vertebral resection with titanium mesh cage and internal fixator with pedicle of vertebral arch nail.Two patients with Thoracic Vertebrae tuberculosis received the posterior procedure total vertebral resection with bone graft and internal fixator with pedicle of vertebral arch nail.Results All the patients were followed up for a period ranging from 6 to 15 months.All patients achieved relief of pain after surgery,and all the patients showed a postoperative neurologic improvement.By Frankel neurological classifications,all patients were improved by 1.5 grades on average.All the patients showed bony fusion after 6 months,and no internal fixation loosening or breach was found.Conclusion It is a feasible and effective to treat Thoracic Vertebrae tumor and tuberculosis by one stage total vertebral resection and internal fixator with pedicle of vertebral arch nail.Compared with combined anterior and posterior procedure,this surgical technique may decrease injuries and has satisfactory result.The treatment can reconstruct the spinal stabilization.The survival time and the life quality of patients have been greatly improved.