scholarly journals Three-Dimensional Virtual Bone Bank System Workflow for Structural Bone Allograft Selection: A Technical Report

Sarcoma ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Lucas Eduardo Ritacco ◽  
German Luis Farfalli ◽  
Federico Edgardo Milano ◽  
Miguel Angel Ayerza ◽  
Domingo Luis Muscolo ◽  
...  
Keyword(s):  
Virtual Environment ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Bone Allograft ◽  
X Rays ◽  
Bone Bank ◽  
Technical Report ◽  
Allograft Selection ◽  
Bank System ◽  
Bone Defect Reconstruction

Structural bone allograft has been used in bone defect reconstruction during the last fifty years with acceptable results. However, allograft selection methods were based on 2-dimensional templates using X-rays. Thanks to preoperative planning platforms, three-dimensional (3D) CT-derived bone models were used to define size and shape comparison between host and donor. The purpose of this study was to describe the workflow of this virtual technique in order to explain how to choose the best allograft using a virtual bone bank system. We measured all bones in a 3D virtual environment determining the best match. The use of a virtual bone bank system has allowed optimizing the allograft selection in a bone bank, providing more information to the surgeons before surgery. In conclusion, 3D preoperative planning in a virtual environment for allograft selection is an important and helpful tool in order to achieve a good match between host and donor.

scholarly journals Validity of an automatic measure protocol in distal femur for allograft selection from a three-dimensional virtual bone bank system

2012 ◽  
Vol 14 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Lucas Eduardo Ritacco ◽  
Christof Seiler ◽  
German Luis Farfalli ◽  
Lutz Nolte ◽  
Mauricio Reyes ◽  
...  
Keyword(s):  
Distal Femur ◽  
Three Dimensional ◽  
Bone Bank ◽  
Allograft Selection ◽  
Bank System

Three-dimensional virtual bone bank system for selecting massive bone allograft in orthopaedic oncology

2015 ◽  
Vol 39 (6) ◽  
pp. 1151-1158 ◽  
Author(s):  
Zhigang Wu ◽  
Jun Fu ◽  
Zhen Wang ◽  
Xiangdong Li ◽  
Jing Li ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bone Allograft ◽  
Bone Bank ◽  
Orthopaedic Oncology ◽  
Bank System ◽  
Massive Bone Allograft ◽  
Massive Bone

scholarly journals Impregnation of a Bone Marrow Allograft with an Antibiotic Prepared According to the Marburg System, an Original Method

2021 ◽  
Vol 1 (56) ◽  
pp. 25-31
Author(s):  
Marietta Arutyunyan ◽  
◽  
Berik Tuleubayev ◽  
Keyword(s):  
Thermal Stability ◽  
Physical And Mechanical Properties ◽  
Bone Allograft ◽  
Original Method ◽  
Antibacterial Drug ◽  
Impregnation Method ◽  
Bone Bank ◽  
Optimal Method ◽  
Heat Treated ◽  
Bank System

The aim: To develop an original method of antibiotic impregnation of bone allograft prepared according to the Marburg bone bank system. Methods. The work was divided into three parts (as part of an experimental study). The first part of the study included the collection and preparation of bone allograft, which was carried out on the basis of the Hospital named after professor Makazhanov, where the femoral heads were harvested, removed during arthroplasty and heat-treated according to the Marburg system of the bone bank. The second stage of the study was to select the optimal antibacterial drug for impregnation, by determining their thermal stability. The determination of thermal stability was carried out at the Department of Microbiology of the Karaganda Medical University. The third stage of the study included conducting experimental work on the development of an impregnation method and evaluating the antibacterial effectiveness of impregnated bone allografts. Results. Heat-treated bone allograft, perforated by the original method using a developed perforation device (the latter received a patent), and then soaked in an antibiotic, showed suppression of the bacterial growth zone by more than 2.5 times (p=0.01), in comparison with other groups. Conclusion. The proposed bone allograft is biodegradable and is close to autologous bone in its physical and mechanical properties. The optimal method of impregnation is bone allograft perforation, developed by an original method using a special perforation device. Keywords: bone allograft, Marburg system, bone bank, antibiotics, osteomyelitis, impregnation, osteo-replacement material.

Measurements in 3D images

1991 ◽  
Vol 49 ◽  
pp. 408-409
Author(s):  
John C. Russ
Keyword(s):  
Three Dimensional ◽  
Image Plane ◽  
X Rays ◽  
Traditional Use ◽  
3D Images ◽  
Confocal Scanning Laser Microscope ◽  
Hard Materials ◽  
Depth Direction ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Three-dimensional (3D) images consisting of arrays of voxels can now be routinely obtained from several different types of microscopes. These include both the transmission and emission modes of the confocal scanning laser microscope (but not its most common reflection mode), the secondary ion mass spectrometer, and computed tomography using electrons, X-rays or other signals. Compared to the traditional use of serial sectioning (which includes sequential polishing of hard materials), these newer techniques eliminate difficulties of alignment of slices, and maintain uniform resolution in the depth direction. However, the resolution in the z-direction may be different from that within each image plane, which makes the voxels non-cubic and creates some difficulties for subsequent analysis.

Evaluation of a collaborative movement task in a distributed three-dimensional virtual environment

2005 ◽  
Author(s):  
Julio C. Mateo ◽  
Joseph T. Manning ◽  
Jeffrey L. Cowgill ◽  
Thomas J. Moore ◽  
Robert H. Gilkey ◽  
...  
Keyword(s):  
Virtual Environment ◽  
Three Dimensional

scholarly journals Application of 3D printing and framework internal fixation technology for high complex rib fractures

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Xuetao Zhou ◽  
Dongsheng Zhang ◽  
Zexin Xie ◽  
Yang Yang ◽  
Menghui Chen ◽  
...  
Keyword(s):  
3D Printing ◽  
Internal Fixation ◽  
Locking Plate ◽  
Rating Scale ◽  
Preoperative Planning ◽  
Numerical Rating Scale ◽  
Chest Ct ◽  
Rib Fractures ◽  
X Rays ◽  
With Screws

Abstract Objective To explore the clinical effect of 3D printing combined with framework internal fixation technology on the minimally invasive internal fixation of high complex rib fractures. Methods Total 16 patients with high complex rib fractures were included in the study. Before the procedure, the 3D rib model was reconstructed based on the thin-layer chest CT scan. According to the 3D model, the rib locking plate was pre-shaped, and the preoperative planning were made including the direction of the locking plate, the location of each nail hole and the length of the screw. During the operation, the locking plate was inserted from the sternum to the outermost fracture lines of ribs with screws at both ends. In addition, the locking plate was used as the frame to sequentially reduce the middle fracture segment and fix with screws or steel wires. Chest x-rays or chest CT scans after surgery were used to assess the ribs recovery. All patients were routinely given non-steroidal anti-inflammatory drugs (NSAIDS) for analgesia, and the pain level was evaluated using numerical rating scale (NRS). Results The preoperative planning according to the 3D printed rib model was accurate. The reduction and fixation of each fracture segment were successfully completed through the framework internal fixation technology. No cases of surgical death, and postoperative chest pain was significantly alleviated. Five to 10 months follow up demonstrated neither loosening of screws, nor displacement of fixtures among patients. The lungs of each patients were clear and in good shape. Conclusion The application of 3D printing combined with framework internal fixation technology to the high complex rib fractures is beneficial for restoring the inherent shape of the thoracic cage, which can realize the accurate and individualized treatment as well as reduces the operation difficulty.

scholarly journals Is Micro X-ray Computer Tomography a Suitable Non-Destructive Method for the Characterisation of Dental Materials?

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1271
Author(s):  
Andreas Koenig ◽  
Leonie Schmohl ◽  
Johannes Scheffler ◽  
Florian Fuchs ◽  
Michaela Schulz-Siegmund ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Computer Tomography ◽  
Mechanical Performance ◽  
Dental Materials ◽  
Three Dimensional ◽  
X Rays ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Multiple Measurements ◽  
High Doses

The aim of the study was to investigate the effect of X-rays used in micro X-ray computer tomography (µXCT) on the mechanical performance and microstructure of a variety of dental materials. Standardised bending beams (2 × 2 × 25 mm3) were forwarded to irradiation with an industrial tomograph. Using three-dimensional datasets, the porosity of the materials was quantified and flexural strength was investigated prior to and after irradiation. The thermal properties of irradiated and unirradiated materials were analysed and compared by means of differential scanning calorimetry (DSC). Single µXCT measurements led to a significant decrease in flexural strength of polycarbonate with acrylnitril-butadien-styrol (PC-ABS). No significant influence in flexural strength was identified for resin-based composites (RBCs), poly(methyl methacrylate) (PMMA), and zinc phosphate cement (HAR) after a single irradiation by measurement. However, DSC results suggest that changes in the microstructure of PMMA are possible with increasing radiation doses (multiple measurements, longer measurements, higher output power from the X-ray tube). In summary, it must be assumed that X-ray radiation during µXCT measurement at high doses can lead to changes in the structure and properties of certain polymers.

scholarly journals Immersive 3D virtual reality imaging in planning minimally invasive and complex adult cardiac surgery

2020 ◽  
Vol 1 (1) ◽  
pp. 62-70
Author(s):  
Amir H Sadeghi ◽  
Wouter Bakhuis ◽  
Frank Van Schaagen ◽  
Frans B S Oei ◽  
Jos A Bekkers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Virtual Reality ◽  
Cardiac Surgery ◽  
Heart Surgery ◽  
Preoperative Planning ◽  
Operating Time ◽  
Three Dimensional ◽  
Cardiothoracic Surgery ◽  
Planning Tool ◽  
Computed Tomography Images

Abstract Aims Increased complexity in cardiac surgery over the last decades necessitates more precise preoperative planning to minimize operating time, to limit the risk of complications during surgery and to aim for the best possible patient outcome. Novel, more realistic, and more immersive techniques, such as three-dimensional (3D) virtual reality (VR) could potentially contribute to the preoperative planning phase. This study shows our initial experience on the implementation of immersive VR technology as a complementary research-based imaging tool for preoperative planning in cardiothoracic surgery. In addition, essentials to set up and implement a VR platform are described. Methods Six patients who underwent cardiac surgery at the Erasmus Medical Center, Rotterdam, The Netherlands, between March 2020 and August 2020, were included, based on request by the surgeon and availability of computed tomography images. After 3D VR rendering and 3D segmentation of specific structures, the reconstruction was analysed via a head mount display. All participating surgeons (n = 5) filled out a questionnaire to evaluate the use of VR as preoperative planning tool for surgery. Conclusion Our study demonstrates that immersive 3D VR visualization of anatomy might be beneficial as a supplementary preoperative planning tool for cardiothoracic surgery, and further research on this topic may be considered to implement this innovative tool in daily clinical practice. Lay summary Over the past decades, surgery on the heart and vessels is becoming more and more complex, necessitating more precise and accurate preoperative planning. Nowadays, operative planning is feasible on flat, two-dimensional computer screens, however, requiring a lot of spatial and three-dimensional (3D) thinking of the surgeon. Since immersive 3D virtual reality (VR) is an upcoming imaging technique with promising results in other fields of surgery, we aimed in this study to explore the additional value of this technique in heart surgery. Our surgeons planned six different heart operations by visualizing computed tomography scans with a dedicated VR headset, enabling them to visualize the patient’s anatomy in an immersive and 3D environment. The outcomes of this preliminary study are positive, with a much more reality-like simulation for the surgeon. In such, VR could potentially be beneficial as a preoperative planning tool for complex heart surgery.

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