The Experts below are selected from a list of 39573 Experts worldwide ranked by ideXlab platform
Hee-soo Kyung - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of Accuracy of a Three-Dimensional Printed Model in Open-Wedge High Tibial Osteotomy.
The Journal of Knee Surgery, 2018Co-Authors: Hee-june Kim, Jaeyeong Park, Kyeong-hyeon Park, Il-hyung Park, Jin-an Jang, Ji-yeon Shin, Hee-soo KyungAbstract:The purpose of this study was to evaluate the usefulness of a three-dimensional (3D) Printed Model for open-wedge high tibial osteotomy (HTO). This study retrospectively evaluated 20 patients with medial knee osteoarthritis and varus deformity. Between October 2015 and July 2016, the patients underwent open-wedge HTO using a 3D Printed Model. The mean age of patients was 55.2 years (range, 51-60 years). The mean preoperative mechanical femorotibial angle (mFTA) was varus 7.8 degrees (range, varus 4.7-11.6 degrees). After measuring the target angle using full-length lower limb weight-bearing radiography, the osteotomy was simulated using 3D images obtained from computed tomography (CT) with the 3D Slicer program. On the basis of the simulated osteotomy section and the target angle, the Model was then designed and Printed. Open-wedge HTO was then performed by applying the 3D Printed Model to the opening gap. The accuracy of osteotomy and the change in posterior tibial slope (PTS) angle were evaluated. The weight-bearing line on the tibial plateau was corrected from a preoperative mean of 19.5 ± 9.8% to a postoperative mean of 63.1 ± 6.1% (p
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More accurate correction can be obtained using a three-dimensional Printed Model in open-wedge high tibial osteotomy.
Knee Surgery Sports Traumatology Arthroscopy, 2018Co-Authors: Hee-june Kim, Jaeyeong Park, Kyeong-hyeon Park, Il-hyung Park, Ji-yeon Shin, Hee-soo KyungAbstract:The purpose of this study was to compare the accuracy of the preoperative planning method using a three-dimensional (3D) Printed Model with that of a method using picture archiving and communication system (PACS) images in high tibial osteotomy (HTO). Patients who underwent HTO using a 3D Printed Model (20 patients) and a method based on PACS images (20 patients) from 2012 to 2016 were compared. After obtaining the correction angle, in the 3D Printed method, the wedge-shaped 3D Printed Model was designed. The PACS method used preoperative radiographs. The accuracy of HTO for each method was compared using radiographs obtained at the first postoperative year. The preoperative and postoperative posterior tibial slope angles were also compared. The weight-bearing line was corrected 21.2 ± 11.8% from preoperatively to 61.6 ± 3.3% postoperatively in the 3D group and from 19.4 ± 12.3% to 61.3 ± 8.1% in the PACS group. The mean absolute difference with the target point was lower in the 3D group (2.3 ± 2.5) than in the PACS group (6.2 ± 5.1; p = 0.005). The number of patients in an acceptable range was higher in the 3D group than in the PACS group. The posterior tibial slope angle was not significantly different in the 3D group (8.6°–8.9°), but was significantly different in the PACS group (9.9°–10.5°, p = 0.042). In open-wedge HTO, a more accurate correction for successful results could be obtained using the 3D Printed Model. IV.
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Open wedge high tibial osteotomy using three-dimensional Printed Models: Experimental analysis using porcine bone.
The Knee, 2017Co-Authors: Jun-dae Kwun, Hee-june Kim, Il-hyung Park, Jae Young Park, Hee-soo KyungAbstract:Abstract Background The purpose of this study was to evaluate the usefulness of three-dimensional (3D) Printed Models for open wedge high tibial osteotomy (HTO) in porcine bone. Methods Computed tomography (CT) images were obtained from 10 porcine knees and 3D imaging was planned using the 3D-Slicer program. The osteotomy line was drawn from the three centimeters below the medial tibial plateau to the proximal end of the fibular head. Then the osteotomy gap was opened until the mechanical axis line was 62.5% from the medial border along the width of the tibial plateau, maintaining the posterior tibial slope angle. The wedge-shaped 3D-Printed Model was designed with the measured angle and osteotomy section and was produced by the 3D printer. The open wedge HTO surgery was reproduced in porcine bone using the 3D-Printed Model and the osteotomy site was fixed with a plate. Accuracy of osteotomy and posterior tibial slope was evaluated after the osteotomy. Results The mean mechanical axis line on the tibial plateau was 61.8±1.5% from the medial tibia. There was no statistically significant difference ( P =0.160). The planned and post-osteotomy correction wedge angles were 11.5±3.2° and 11.4±3.3°, and the posterior tibial slope angle was 11.2±2.2° pre-osteotomy and 11.4±2.5° post-osteotomy. There were no significant differences ( P =0.854 and P =0.429, respectively). Conclusion This study showed that good results could be obtained in high tibial osteotomy by using 3D Printed Models of porcine legs.
Edward D Verrier - One of the best experts on this subject based on the ideXlab platform.
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scan plan print practice perform development and use of a patient specific 3 dimensional Printed Model in adult cardiac surgery
The Journal of Thoracic and Cardiovascular Surgery, 2017Co-Authors: Joshua L Hermsen, Thomas M Burke, Stephen P Seslar, David S Owens, Beth Ripley, Nahush A Mokadam, Edward D VerrierAbstract:Abstract Objective Static 3-dimensional printing is used for operative planning in cases that involve difficult anatomy. An interactive 3D print allowing deliberate surgical practice would represent an advance. Methods Two patients with hypertrophic cardiomyopathy had 3-dimensional prints constructed preoperatively. Stereolithography files were generated by segmentation of chest computed tomographic scans. Prints were made with hydrogel material, yielding tissue-like Models that can be surgically manipulated. Septal myectomy of the print was performed preoperatively in the simulation laboratory. Volumetric measures of print and patient resected specimens were compared. An assessment tool was developed and used to rate the utility of this process. Clinical and echocardiographic data were reviewed. Results There was congruence between volumes of print and patient resection specimens (patient 1, 3.5 cm 3 and 3.0 cm 3 , respectively; patient 2, 4.0 cm 3 and 4.0 cm 3 , respectively). The prints were rated useful (3.5 and 3.6 on a 5-point Likert scale) for preoperative visualization, planning, and practice. Intraoperative echocardiographic assessment showed adequate relief of left ventricular outflow tract obstruction (patient 1, 80 mm Hg to 18 mm Hg; patient 2, 96 mm Hg to 9 mm Hg). Both patients reported symptomatic improvement (New York Heart Association functional class III to class I). Conclusions Three-dimensional printing of interactive hypertrophic cardiomyopathy heart Models allows for patient-specific preoperative simulation. Resection volume relationships were congruous on both specimens and suggest evidence of construct validity. This Model also holds educational promise for simulation of a low-volume, high-risk operation that is traditionally difficult to teach.
Jean-christophe Bernhard - One of the best experts on this subject based on the ideXlab platform.
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personalized 3d Printed Model of kidney and tumor anatomy a useful tool for patient education
World Journal of Urology, 2016Co-Authors: Jean-christophe Bernhard, Shuji Isotani, Toru Matsugasumi, Vinay Duddalwar, Andrew J. Hung, Evren Süer, Eduard Baco, Raj Satkunasivam, Hooman DjaladatAbstract:Purpose To assess the impact of 3D Printed Models of renal tumor on patient’s understanding of their conditions. Patient understanding of their medical condition and treatment satisfaction has gained increasing attention in medicine. Novel technologies such as additive manufacturing [also termed three-dimensional (3D) printing] may play a role in patient education.
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Personalized 3D Printed Model of kidney and tumor anatomy: a useful tool for patient education.
World Journal of Urology, 2015Co-Authors: Jean-christophe Bernhard, Shuji Isotani, Toru Matsugasumi, Vinay Duddalwar, Andrew J. Hung, Evren Süer, Eduard Baco, Raj Satkunasivam, Hooman Djaladat, Charles MetcalfeAbstract:To assess the impact of 3D Printed Models of renal tumor on patient’s understanding of their conditions. Patient understanding of their medical condition and treatment satisfaction has gained increasing attention in medicine. Novel technologies such as additive manufacturing [also termed three-dimensional (3D) printing] may play a role in patient education. A prospective pilot study was conducted, and seven patients with a primary diagnosis of kidney tumor who were being considered for partial nephrectomy were included after informed consent. All patients underwent four-phase multi-detector computerized tomography (MDCT) scanning from which renal volume data were extracted to create life-size patient-specific 3D Printed Models. Patient knowledge and understanding were evaluated before and after 3D Model presentation. Patients’ satisfaction with their specific 3D Printed Model was also assessed through a visual scale. After viewing their personal 3D kidney Model, patients demonstrated an improvement in understanding of basic kidney physiology by 16.7 % (p = 0.018), kidney anatomy by 50 % (p = 0.026), tumor characteristics by 39.3 % (p = 0.068) and the planned surgical procedure by 44.6 % (p = 0.026). Presented herein is the initial clinical experience with 3D printing to facilitate patient’s pre-surgical understanding of their kidney tumor and surgery.
Stephen P Seslar - One of the best experts on this subject based on the ideXlab platform.
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scan plan print practice perform development and use of a patient specific 3 dimensional Printed Model in adult cardiac surgery
The Journal of Thoracic and Cardiovascular Surgery, 2017Co-Authors: Joshua L Hermsen, Thomas M Burke, Stephen P Seslar, David S Owens, Beth Ripley, Nahush A Mokadam, Edward D VerrierAbstract:Abstract Objective Static 3-dimensional printing is used for operative planning in cases that involve difficult anatomy. An interactive 3D print allowing deliberate surgical practice would represent an advance. Methods Two patients with hypertrophic cardiomyopathy had 3-dimensional prints constructed preoperatively. Stereolithography files were generated by segmentation of chest computed tomographic scans. Prints were made with hydrogel material, yielding tissue-like Models that can be surgically manipulated. Septal myectomy of the print was performed preoperatively in the simulation laboratory. Volumetric measures of print and patient resected specimens were compared. An assessment tool was developed and used to rate the utility of this process. Clinical and echocardiographic data were reviewed. Results There was congruence between volumes of print and patient resection specimens (patient 1, 3.5 cm 3 and 3.0 cm 3 , respectively; patient 2, 4.0 cm 3 and 4.0 cm 3 , respectively). The prints were rated useful (3.5 and 3.6 on a 5-point Likert scale) for preoperative visualization, planning, and practice. Intraoperative echocardiographic assessment showed adequate relief of left ventricular outflow tract obstruction (patient 1, 80 mm Hg to 18 mm Hg; patient 2, 96 mm Hg to 9 mm Hg). Both patients reported symptomatic improvement (New York Heart Association functional class III to class I). Conclusions Three-dimensional printing of interactive hypertrophic cardiomyopathy heart Models allows for patient-specific preoperative simulation. Resection volume relationships were congruous on both specimens and suggest evidence of construct validity. This Model also holds educational promise for simulation of a low-volume, high-risk operation that is traditionally difficult to teach.
Bob Kiaii - One of the best experts on this subject based on the ideXlab platform.
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3 dimensional Printed Model for planning transcatheter mitral valve replacement
Jacc-cardiovascular Interventions, 2018Co-Authors: Rodrigo Bagur, Anson Cheung, Michael W A Chu, Bob KiaiiAbstract:A 69-year-old man with a previous history of mitral valve repair plus aortic valve replacement subsequently developed prosthetic valve endocarditis and underwent aortomitral curtain reconstruction and mitral valve re-repair with a 38-mm Memo 3D (LivaNova, London, United Kingdom) ring and a Bentall
