AN ANALYSIS OF COMPRESSION FRACTURES AND KYPHOPLASTY REPAIRS TO THE LUMBAR AND THORACIC SPINE SEGMENTS: USING COMPUTER SIMULATION AND 3D PRINTED MODELS

2021 ◽  
Author(s):  
Dietmar Moeller ◽  
Lori Lioce ◽  
Cooper Gunter ◽  
Gary Maddux ◽  
Ishella Fogle ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Thoracic Spine ◽  
Compression Fractures ◽  
3D Printed

Vertebroplasty for the Treatment of Compression Fractures in the Upper and Middle Thoracic Spine

2005 ◽  
Vol 18 (2) ◽  
pp. 142
Author(s):  
Seok Won Kim ◽  
Seung Myung Lee ◽  
Ho Shin ◽  
Kyung Joon Lim
Keyword(s):  
Thoracic Spine ◽  
Compression Fractures

Design, Fabrication, and Accuracy of a Novel Noncovering Lock-Mechanism Bilateral Patient-Specific Drill Guide Template for Nondeformed and Deformed Thoracic Spines

2021 ◽  
pp. 155633162199633
Author(s):  
Mehran Ashouri-Sanjani ◽  
Shima Mohammadi-Moghadam ◽  
Parisa Azimi ◽  
Navid Arjmand
Keyword(s):  
Thoracic Spine ◽  
Sagittal Plane ◽  
Ct Scanning ◽  
Entry Point ◽  
In Vivo Studies ◽  
Patient Specific ◽  
Plane Angle ◽  
Severe Scoliosis ◽  
3D Printed

Background: Pedicle screw (PS) placement has been widely used in fusion surgeries on the thoracic spine. Achieving cost-effective yet accurate placements through nonradiation techniques remains challenging. Questions/Purposes: Novel noncovering lock-mechanism bilateral vertebra-specific drill guides for PS placement were designed/fabricated, and their accuracy for both nondeformed and deformed thoracic spines was tested. Methods: One nondeformed and 1 severe scoliosis human thoracic spine underwent computed tomographic (CT) scanning, and 2 identical proportions of each were 3-dimensional (3D) printed. Pedicle-specific optimal (no perforation) drilling trajectories were determined on the CT images based on the entry point/orientation/diameter/length of each PS. Vertebra-specific templates were designed and 3D printed, assuring minimal yet firm contacts with the vertebrae through a noncovering lock mechanism. One model of each patient was drilled using the freehand and one using the template guides (96 pedicle drillings). Postoperative CT scans from the models with the inserted PSs were obtained and superimposed on the preoperative planned models to evaluate deviations of the PSs. Results: All templates fitted their corresponding vertebra during the simulated operations. As compared with the freehand approach, PS placement deviations from their preplanned positions were significantly reduced: for the nonscoliosis model, from 2.4 to 0.9 mm for the entry point, 5.0° to 3.3° for the transverse plane angle, 7.1° to 2.2° for the sagittal plane angle, and 8.5° to 4.1° for the 3D angle, improving the success rate from 71.7% to 93.5%. Conclusions: These guides are valuable, as the accurate PS trajectory could be customized preoperatively to match the patients’ unique anatomy. In vivo studies will be required to validate this approach.

Clinical Application of a 3D-Printed Positioning Module and Navigation Template for Percutaneous Vertebroplasty

2021 ◽  
pp. 155335062110624
Author(s):  
Jing Yang ◽  
Penghui Ni ◽  
Lina Zhang ◽  
Zhanxin Lu ◽  
Dapeng Liu ◽  
...  
Keyword(s):  
Percutaneous Vertebroplasty ◽  
Operation Time ◽  
Vertebral Compression Fractures ◽  
Control Group ◽  
Compression Fractures ◽  
Intraoperative Fluoroscopy ◽  
3D Printed ◽  
Vas Scores ◽  
Experimental Group ◽  
Navigation Template

Background This study aimed to evaluate a personalized 3D-printed percutaneous vertebroplasty positioning module and navigation template based on preoperative CT scan data that was designed to treat patients with vertebral compression fractures caused by osteoporosis. Methods A total of 22 patients with vertebral compression fractures admitted to our hospital were included in the study. Positioning was performed with the new 3D-printed positioning module, and the navigation template was used for patients in the experimental group, and the traditional perspective method was used for patients in the control group. The experimental group consisted of 11 patients, 2 males and 9 females, with a mean age of 67.27 ± 11.86 years (range: 48 to 80 years), and the control group consisted of 11 patients, 3 males and 8 females, with a mean age of 74.27 ± 7.24 years (range: 63 to 89 years). The puncture positioning duration, number of intraoperative fluoroscopy sessions, and preoperative and postoperative visual analog scale (VAS) scores were statistically analyzed in both groups. Results The experimental group had shorter puncture positioning durations and fewer intraoperative fluoroscopy sessions than the control group, and the differences were statistically significant (P < .05). There were no significant differences in age or preoperative or postoperative VAS scores between the two groups (P > .05). Conclusions The new 3D-printed vertebroplasty positioning module and navigation template shortened the operation time and reduced the number of intraoperative fluoroscopy sessions. It also reduced the difficulty in performing percutaneous vertebroplasty and influenced the learning curve of senior doctors learning this operation to a certain degree.

scholarly journals FEATURES OF THE DIAGNOSIS OF UNCOMPLICATED COMPRESSION FRACTURE OF THE THORACIC SPINE IN CHILDREN

2019 ◽  
Vol 20 (5) ◽  
pp. 307-311
Author(s):  
Yakhya M. Yakhyaev ◽  
M. I. Izrailov ◽  
V. N. Merkulov ◽  
A. M. Aliskandiev ◽  
T. Ya. Yakhyaeva
Keyword(s):  
Thoracic Spine ◽  
Compression Fracture ◽  
Diagnostic Process ◽  
Vertebral Compression Fractures ◽  
Thoracic Vertebrae ◽  
Healthy Children ◽  
X Ray ◽  
Compression Fractures ◽  
Fractures In Children ◽  
Ct And Mri

X-ray diagnostics of compression fractures of bodies of the thoracic vertebrae in children not seldom causes great difficulties due to the fact that even in healthy children vertebrae have a number of features, particularly, the wedge shape. For the purpose of differential diagnosis there was performed chest X-ray examination of the thoracic vertebrae in healthy children and cases after the compression damage. The wedge index and the disk coefficient for various segments of the thoracic spine were calculated. The diagnostic efficiency of radionuclide studies was estimated to reaches 79%. The useof highly informative modern medical techniques (CT and MRI) in the diagnosis of vertebral compression fractures in children allows accurately and timely make the diagnosis and determine the condition of the surrounding tissues. Based on the analysis of medical records, radiographs, identification of options of radionuclide, CT and MRI studies, there was elaborated an algorithm for the diagnosis of compression fractures of vertebrae, which allowed optimize the diagnostic process. There are determined advantages of this algorithm.

scholarly journals A Rarely Seen Multilevel Thoracic Vertebral Fracture after a Nocturnal Hypoglycemic Convulsion Attack

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Ebru Atalar ◽  
Cuneyd Gunay ◽  
Hakan Atalar ◽  
Tugba Tunc
Keyword(s):  
Back Pain ◽  
Thoracic Spine ◽  
Type I Diabetes ◽  
Compression Fracture ◽  
Diabetic Patients ◽  
Type I ◽  
Rare Injury ◽  
Compression Fractures ◽  
History Of ◽  
Insulin Dependent Diabetic

A 49-year-old male presented with acute midthoracic severe back pain following a witnessed nocturnal convulsion attack. There was no history of trauma and the patient had a 23-year history of Type I diabetes mellitus. MRI scans of the thoracic spine revealed compression fractures at T5, T6, T7, and T8 vertebrae. The patient was treated conservatively. At 17 months after the initial diagnosis, the complaints of back pain had been resolved and the patient was able to easily undertake daily living activities. Hypoglycaemia is a common problem in diabetic patients treated with insulin. Convulsions may occur as a consequence of insulin-induced hypoglycemia. Nontraumatic compression fractures of the thoracic spine following seizures are a rare injury. Contractions of strong paraspinal muscles can lead to compression fracture of the midthoracic spine. Unrecognized hypoglycaemia should be considered to be a possible cause of convulsions in insulin-dependent diabetic patients. The aim of this report is to point out a case of rarely seen multilevel consecutive vertebrae fractures in a diabetic patient after a nocturnal hypoglycaemic convulsion attack.

Link compression fractures of the thoracic spine syndrome and connective tissue dysplasia with changes in the electrocardiogram in children

2015 ◽  
Vol 9 (2) ◽  
pp. 0-0
Author(s):  
Соболенкова ◽  
V. Sobolenkova ◽  
Федоров ◽  
S. Fedorov
Keyword(s):  
Connective Tissue ◽  
Thoracic Spine ◽  
Bone Fractures ◽  
Physical Culture ◽  
Compression Fractures ◽  
High Elasticity ◽  
High Incidence ◽  
Fractures Of The Spine ◽  
Connective Tissue Dysplasia ◽  
Increased Activity

Syndrome connective tissue dysplasia most often in children is manifested by changes in the musculoskeletal system, including bone fractures. The high incidence of cardiac dysfunction is observed in this syndrome, as well as in the pathology of the thoracic spine. In this study, 79.9% of children with compression fractures of the spine had symptoms of connective tissue dysplasia, the most striking manifestations were presented by hyper-mobility of the joints, thinning and high elasticity of the skin, deformities of the lower extremities (p=0.01). These patients were significantly more frequent overgrowth, diseases of respiratory system and otolaryngology. These children (33.9%) had engaged in physical culture at school in full. The children with connective tissue dysplasia (35.1%) were engaged in sports sections, according to the survey, these sections are gymnastics, soccer, dance (r=0,01). In this group there were injuries on the lessons of physical culture and sports twice as often. The analysis of the ECG in these patients allowed the authors to reliably detect increased activity of the left ventricle syndrome and early repolarization of the ventricles (p=0.01). Currently, the latter phenomenon is of great interest in the study because it is considered as a predictor of ventricular and supra-ventricular arrhythmias.

scholarly journals Accuracy Assessment of Pedicle and Lateral Mass Screw Insertion Assisted by Customized 3D-Printed Drill Guides: A Human Cadaver Study

2018 ◽  
Vol 16 (1) ◽  
pp. 94-102 ◽  
Author(s):  
Peter A J Pijpker ◽  
Joep Kraeima ◽  
Max J H Witjes ◽  
D L Marinus Oterdoom ◽  
Maarten H Coppes ◽  
...  
Keyword(s):  
Thoracic Spine ◽  
Patient Specific ◽  
Lateral Mass ◽  
Lateral Mass Screw ◽  
Upper Thoracic Spine ◽  
Screw Insertion ◽  
Drill Guide ◽  
Entry Points ◽  
3D Printed ◽  
Upper Thoracic

Abstract BACKGROUND Accurate cervical screw insertion is of paramount importance considering the risk of damage to adjacent vital structures. Recent research in 3-dimensional (3D) technology describes the advantage of patient-specific drill guides for accurate screw positioning, but consensus about the optimal guide design and the accuracy is lacking. OBJECTIVE To find the optimal design and to evaluate the accuracy of individualized 3D-printed drill guides for lateral mass and pedicle screw placement in the cervical and upper thoracic spine. METHODS Five Thiel-embalmed human cadavers were used for individualized drill-guide planning of 86 screw trajectories in the cervical and upper thoracic spine. Using 3D bone models reconstructed from acquired computed tomography scans, the drill guides were produced for both pedicle and lateral mass screw trajectories. During the study, the initial minimalistic design was refined, resulting in the advanced guide design. Screw trajectories were drilled and the realized trajectories were compared to the planned trajectories using 3D deviation analysis. RESULTS The overall entry point and 3D angular accuracy were 0.76 ± 0.52 mm and 3.22 ± 2.34°, respectively. Average measurements for the minimalistic guides were 1.20 mm for entry points, 5.61° for the 3D angulation, 2.38° for the 2D axial angulation, and 4.80° for the 2D sagittal angulation. For the advanced guides, the respective measurements were 0.66 mm, 2.72°, 1.26°, and 2.12°, respectively. CONCLUSION The study ultimately resulted in an advanced guide design including caudally positioned hooks, crosslink support structure, and metal inlays. The novel advanced drill guide design yields excellent drilling accuracy.

scholarly journals Finite Element Method Analysis of Compression Fractures on Whole-Spine Models Including the Rib Cage

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Norihiro Nishida ◽  
Junji Ohgi ◽  
Fei Jiang ◽  
Saki Ito ◽  
Yasuaki Imajo ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Thoracic Spine ◽  
Medical Images ◽  
Compression Fracture ◽  
Rib Cage ◽  
Compression Fractures ◽  
Spine Model ◽  
Whole Spine ◽  
Element Method

Spinal compression fractures commonly occur at the thoracolumbar junction. We have previously constructed a 3-dimensional whole-spine model from medical images by using the finite element method (FEM) and then used this model to develop a compression fracture model. However, these models lacked the rib cage. No previous study has used whole-spine models including the rib cage constructed from medical images to analyze compression fractures. Therefore, in this study, we added the rib cage to whole-spine models. We constructed the models, including a normal spine model without the rib cage, a whole-spine model with the rib cage, and whole-spine models with compression fractures, using FEM analysis. Then, we simulated a person falling on the buttocks to perform stress analysis on the models and to examine to what extent the rib cage affects the analysis of compression fractures. The results showed that the intensity of strain and the vertebral body with minimum principle strain differed between the spine model including the rib cage and that excluding the rib cage. The strain on the spine model excluding the rib cage had approximately twice the intensity of the strain on the spine model including the rib cage. Therefore, the rib cage contributed to the stability of the thoracic spine, thus preventing deformation of the upper thoracic spine. However, the presence of the rib cage increased the strain around the site of compression fracture, thus increasing the possibilities of a refracture and fractures of adjacent vertebral bodies. Our study suggests that the analysis using spine models including the rib cage should be considered in future investigations of disorders of the spine and internal fracture fixation. The development of improved models may contribute to the improvement of prognosis and treatment of individual patients with disorders of the spine.

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