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Virtual surgical planning

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https://www.readbyqxmd.com/read/27905167/preoperative-surgical-simulation-and-validation-of-the-line-of-resection-in-anterolateral-craniofacial-resection-of-advanced-sinonasal-sinus-carcinoma
#1
Naoki Nishio, Masazumi Fujii, Yuichiro Hayashi, Mariko Hiramatsu, Takashi Maruo, Kenichiro Iwami, Yuzuru Kamei, Shunjiro Yagi, Keisuke Takanari, Yasushi Fujimoto
BACKGROUND: The purpose of this study was to assess the usefulness and accuracy of preoperative 3D virtual simulation of anterolateral craniofacial resection in cases of advanced sinonasal sinus carcinoma. METHODS: Seven patients with advanced (T4 classification) sinonasal sinus carcinoma who underwent anterolateral craniofacial resection in our hospital between 2011 and 2013 were included in this study. Postsimulation CT images were fused with postoperative CT images and differences between the planned and actual osteotomy were measured in 3 regions of the skull base...
December 1, 2016: Head & Neck
https://www.readbyqxmd.com/read/27898160/haptic-feedback-improves-surgeons-user-experience-and-fracture-reduction-in-facial-trauma-simulation
#2
Sabine Girod, Sara C Schvartzman, Dyani Gaudilliere, Kenneth Salisbury, Rebeka Silva
Computer-assisted surgical (CAS) planning tools are available for craniofacial surgery, but are usually based on computer-aided design (CAD) tools that lack the ability to detect the collision of virtual objects (i.e., fractured bone segments). We developed a CAS system featuring a sense of touch (haptic) that enables surgeons to physically interact with individual, patient-specific anatomy and immerse in a three-dimensional virtual environment. In this study, we evaluated initial user experience with our novel system compared to an existing CAD system...
2016: Journal of Rehabilitation Research and Development
https://www.readbyqxmd.com/read/27893557/changes-in-upper-airway-volume-following-orthognathic-surgery
#3
Lillian Marcussen, Kasper Stokbro, Esben Aagaard, Peter Torkov, Torben Thygesen
Reduced volume of the internal skeletal dimensions of the face is 1 of the main causes of obstructive sleep apnea, and attention to patients' airways is necessary when planning orthognathic treatment. This study aims to describe changes in upper airway volume following virtually planned orthognathic surgery.A retrospective pilot study was designed with 30 randomly selected patients (10 men and 20 women, aged 23.1 ± 6.8 years, molar-relations: 15 neutral, 8 distal, and 7 mesial). Cone-beam computed tomography scans were performed before surgery and 1 week following surgery...
November 23, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27890537/computational-fluid-dynamics-modeling-of-contrast-transport-in-basilar-aneurysms-following-flow-altering-surgeries
#4
Alireza Vali, Adib A Abla, Michael T Lawton, David Saloner, Vitaliy L Rayz
In vivo measurement of blood velocity fields and flow descriptors remains challenging due to image artifacts and limited resolution of current imaging methods; however, in vivo imaging data can be used to inform and validate patient-specific computational fluid dynamics (CFD) models. Image-based CFD can be particularly useful for planning surgical interventions in complicated cases such as fusiform aneurysms of the basilar artery, where it is crucial to alter pathological hemodynamics while preserving flow to the distal vasculature...
November 11, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27887876/an-accuracy-study-of-computer-planned-implant-placement-in-the-augmented-maxilla-using-osteosynthesis-screws
#5
L M Verhamme, G J Meijer, A Soehardi, S J Bergé, T Xi, T J J Maal
Previous research on the accuracy of flapless implant placement of virtually planned implants in the augmented maxilla revealed unfavourable discrepancies between implant planning and placement. By using the osteosynthesis screws placed during the augmentation procedure, the surgical template could be optimally stabilized. The purpose of this study was to validate this method by evaluating its clinically relevant accuracy. Twelve consecutive fully edentulous patients with extreme resorption of the maxilla were treated with a bone augmentation procedure...
November 22, 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27875515/reconstruction-of-congenital-mandibular-hypoplasia-with-microvascular-free-fibula-flaps-in-the-pediatric-population-a-paradigm-shift
#6
Emily C Cleveland, Jamie Zampell, Tomer Avraham, Z-Hye Lee, David Hirsch, Jamie P Levine
BACKGROUND: The microvascular free fibula flap has become the gold standard for reconstruction of complex mandibular defects since its description by Hidalgo in 1989. Prior studies have demonstrated its safety and efficacy in the pediatric population. However, this reconstructive method is often used only as a last resort for correction of congenital mandibular hypoplasia, after failure of bone grafting and distraction osteogenesis. The authors describe our experience using this technique, facilitated by virtual planning and prefabricated cutting jigs, for children with severe congenital mandibular hypoplasia...
November 21, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27862058/translation-of-first-north-american-50-and-70-cc-total-artificial-heart-virtual-and-clinical-implantations-utility-of-3d-computed-tomography-to-test-fit-devices
#7
Alice S Ferng, Isabel Oliva, Clinton Jokerst, Ryan Avery, Alana M Connell, Phat L Tran, Richard G Smith, Zain Khalpey
Since the creation of SynCardia's 50 cc Total Artificial Hearts (TAHs), patients with irreversible biventricular failure now have two sizing options. Herein, a case series of three patients who have undergone successful 50 and 70 cc TAH implantation with complete closure of the chest cavity utilizing preoperative "virtual implantation" of different sized devices for surgical planning are presented. Computed tomography (CT) images were used for preoperative planning prior to TAH implantation. Three-dimensional (3D) reconstructions of preoperative chest CT images were generated and both 50 and 70 cc TAHs were virtually implanted into patients' thoracic cavities...
November 10, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27848082/quantitative-analysis-of-the-trajectory-of-simulated-basilar-apex-aneurysms-through-the-internal-carotid-artery-to-assess-the-need-for-an-orbitozygomatic-approach
#8
Yasushi Motoyama, Yasuo Hironaka, Fumihiko Nishimura, Pritam Gurung, Ryota Sasaki, Yasuhiro Takeshima, Ryosuke Matsuda, Kentaro Tamura, Ichiro Nakagawa, Young-Su Park, Hiroyuki Nakase
BACKGROUND: The aim of this study was to identify the correlation between the location of the internal carotid artery (ICA) and the need for an orbitozygomatic approach (OZA) when approaching a basilar apex (BX) aneurysm. MATERIALS AND METHODS: By imaging the virtual trajectory to access the basilar artery (BA) through the ICA, the correlations among the height of the BX, the height and lateral breadth of the bifurcation of the ICA, and the need for removal of the orbital rim or zygomatic arch were investigated using three-dimensional computed tomography angiography (3DCTA) data of approximately 80 random samples not limited to BX aneurysms...
November 15, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27843356/virtual-surgical-planning-and-3d-printing-in-prosthetic-orbital-reconstruction-with-percutaneous-implants-a-technical-case-report
#9
Yu-Hui Huang, Rosemary Seelaus, Linping Zhao, Pravin K Patel, Mimis Cohen
Osseointegrated titanium implants to the cranial skeleton for retention of facial prostheses have proven to be a reliable replacement for adhesive systems. However, improper placement of the implants can jeopardize prosthetic outcomes, and long-term success of an implant-retained prosthesis. Three-dimensional (3D) computer imaging, virtual planning, and 3D printing have become accepted components of the preoperative planning and design phase of treatment. Computer-aided design and computer-assisted manufacture that employ cone-beam computed tomography data offer benefits to patient treatment by contributing to greater predictability and improved treatment efficiencies with more reliable outcomes in surgical and prosthetic reconstruction...
2016: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/27837304/utility-and-scope-of-rapid-prototyping-in-patients-with-complex-muscular-ventricular-septal-defects-or-double-outlet-right-ventricle-does-it-alter-management-decisions
#10
Puneet Bhatla, Justin T Tretter, Achi Ludomirsky, Michael Argilla, Larry A Latson, Sujata Chakravarti, Piers C Barker, Shi-Joon Yoo, Doff B McElhinney, Nicole Wake, Ralph S Mosca
Rapid prototyping facilitates comprehension of complex cardiac anatomy. However, determining when this additional information proves instrumental in patient management remains a challenge. We describe our experience with patient-specific anatomic models created using rapid prototyping from various imaging modalities, suggesting their utility in surgical and interventional planning in congenital heart disease (CHD). Virtual and physical 3-dimensional (3D) models were generated from CT or MRI data, using commercially available software for patients with complex muscular ventricular septal defects (CMVSD) and double-outlet right ventricle (DORV)...
November 11, 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27833903/virtual-3d-modeling-of-airways-in-congenital-heart-defects
#11
Simone Speggiorin, Saravanan Durairaj, Branko Mimic, Antonio F Corno
The involvement of the airway is not uncommon in the presence of complex cardiovascular malformations. In these cases, a careful inspection of the relationship between the airway and the vasculature is paramount to plan the surgical procedure. Three-dimensional printing enhanced the visualization of the cardiovascular structure. Unfortunately, IT does not allow to remove selected anatomy to improve the visualization of the surrounding ones. Computerized modeling has the potential to fill this gap by allowing a dynamic handling of different anatomies, increasing the exposure of vessels or bronchi to show their relationship...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27817764/supplementary-educational-models-in-canadian-neurosurgery-residency-programs
#12
Won Hyung A Ryu, Sonny Chan, Garnette R Sutherland
BACKGROUND: The proposed implementation of work hour restrictions has presented a significant challenge of maintaining the quality of resident education and ensuring adequate hands-on experience that is essential for novice surgeons. To maintain the level of resident surgical competency, revision of the apprentice model of surgical education to include supplementary educational methods, such as laboratory and virtual reality (VR) simulations, have become frequent topics of discussion...
November 7, 2016: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/27813710/usefulness-of-three-dimensional-modeling-in-surgical-planning-resident-training-and-patient-education
#13
Ciro Andolfi, Alejandro Plana, Patrick Kania, P Pat Banerjee, Stephen Small
BACKGROUND: Imaging has a critical impact on surgical decision making and three-dimensional (3D) digital models of patient pathology can now be made commercially. We developed a 3D digital model of a cancer of the head of the pancreas by integrating actual CT data with 3D modeling process. After this process, the virtual pancreatic model was also produced using a high-quality 3D printer. PATIENTS AND METHODS: A 56-year-old female with pancreatic head adenocarcinoma presented with biliary obstruction and jaundice...
November 4, 2016: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/27806755/-clinical-application-and-accuracy-of-the-genioplasty-surgical-templates-system-for-osseous-genioplasty
#14
B Li, H P Wei, T F Jiang, S Y Shen, G F Shen, X D Wang
Objective: To develop and validate a new genioplasty templates system for monoblock osseous genioplasty. Methods: Thirty-six patients with chin deformities were enrolled in this study. The chin template system included a cutting guide and a repositioning guide for a genioplasty. Chin templates were designed in a computer and fabricated using a three-dimensional printing technique. The accuracy of the genioplasty templates were assessed by comparing the actual postoperative outcomes with the virtual plan. Results: All genioplasty was successfully completed by the template system...
November 9, 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/27798056/computational-modelling-for-congenital-heart-disease-how-far-are-we-from-clinical-translation
#15
REVIEW
Giovanni Biglino, Claudio Capelli, Jan Bruse, Giorgia M Bosi, Andrew M Taylor, Silvia Schievano
Computational models of congenital heart disease (CHD) have become increasingly sophisticated over the last 20 years. They can provide an insight into complex flow phenomena, allow for testing devices into patient-specific anatomies (pre-CHD or post-CHD repair) and generate predictive data. This has been applied to different CHD scenarios, including patients with single ventricle, tetralogy of Fallot, aortic coarctation and transposition of the great arteries. Patient-specific simulations have been shown to be informative for preprocedural planning in complex cases, allowing for virtual stent deployment...
October 25, 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/27785390/clinical-results-of-autologous-bone-augmentation-harvested-from-the-mandibular-ramus-prior-to-implant-placement-an-analysis-of-104-cases
#16
Andreas Sakkas, Konstantinidis Ioannis, Karsten Winter, Alexander Schramm, Frank Wilde
Background: The aim of this study was the evaluation of the clinical success and complication rates associated with autologous bone grafts harvested from the mandibular ramus for alveolar ridge augmentation and the identification of possible risk factors for graft failure. Methods: In a consecutive retrospective study 86 patients could be included. In these patients a total of 104 bone grafts from the mandibular ramus were harvested for alveolar ridge augmentation. Medical history, age of patient, smoking status, periodontal status and complications were recorded...
2016: GMS Interdisciplinary Plastic and Reconstructive Surgery DGPW
https://www.readbyqxmd.com/read/27780642/inferior-subapical-osteotomy-for-dentoalveolar-decompensation-of-class-iii-malocclusion-in-surgery-first-and-surgery-early-orthognathic-treatment
#17
F Hernández-Alfaro, M J Nieto, V Ruiz-Magaz, A Valls-Ontañón, I Méndez-Manjón, R Guijarro-Martínez
Increasing experience with alternative timing protocols in orthognathic surgery has given way to new surgical and orthodontic techniques to shorten treatment times, reduce biological costs, and improve the final outcome. A prospective evaluation of class III patients who received an inferior segmental osteotomy (ISO) for decompensation of significantly retroclined lower incisors in the context of 'surgery-first' (SF) or 'surgery-early' (SE) timing protocols was performed. Treatment was planned virtually. A thorough periodontal assessment was performed at baseline and periodically until debonding...
October 22, 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27776880/guided-autotransplantation-of-teeth-a-novel-method-using-virtually-planned-3-dimensional-templates
#18
Georg D Strbac, Albrecht Schnappauf, Katharina Giannis, Michael H Bertl, Andreas Moritz, Christian Ulm
INTRODUCTION: The aim of this study was to introduce an innovative method for autotransplantation of teeth using 3-dimensional (3D) surgical templates for guided osteotomy preparation and donor tooth placement. METHODS: This report describes autotransplantation of immature premolars as treatment of an 11-year-old boy having suffered severe trauma with avulsion of permanent maxillary incisors. This approach uses modified methods from guided implant surgery by superimposition of Digital Imaging and Communications in Medicine files and 3D data sets of the jaws in order to predesign 3D printed templates with the aid of a fully digital workflow...
October 21, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27760170/three-dimensional-visualization-and-imaging-of-the-entry-tear-and-intimal-flap-of-aortic-dissection-using-ct-virtual-intravascular-endoscopy
#19
Yafei Qi, Xiaoyuan Ma, Gang Li, Xiangxing Ma, Qing Wang, Dexin Yu
AIMS: Conventional computed tomography (CT) approaches provides limited visualization of the entire endoluminal changes of aortic dissection (AD), which is essential for its treatment. As an important supplement, three-dimensional CT virtual intravascular endoscopy (VIE) can show relevant details. This study aims to determine the value of VIE in displaying the entry tear and intimal flap of AD. METHODS AND RESULTS: Among 127 consecutive symptomatic patients with suspected AD who underwent CT angiography (CTA), 84 subjects were confirmed to have AD and were included in the study...
2016: PloS One
https://www.readbyqxmd.com/read/27755414/virtual-surgery-planning-in-orthomorphic-correction-of-mandibular-dysmorphology
#20
Harsh Pipalia, Praveen Ganesh, Samarth Shetty, Paul C Salins, Rohan Raut, Kiran Kumar Boyina
Three-dimensional virtual surgery programs are widely available for orthognathic surgery. The advent of imaging software programs has proved to be useful for diagnosis, treatment planning, outcome measurement, and three-dimensional surgical simulation. Complex maxillofacial malformations continue to present challenges in analysis and correction beyond modern technology. Orthomorphic correction for mandibular dysmorphology refers to basal bone movement without any change in dental component. The purpose of this paper is to present a virtual surgery planning for surgeons to perform the orthomorphic surgery with precision and quantification...
October 14, 2016: Journal of Craniofacial Surgery
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