scholarly journals Use of three-dimensional technology for complications of upper limb fracture treatment

2019 ◽  
Vol 4 (6) ◽  
pp. 302-312 ◽  
Author(s):  
Maartje Michielsen ◽  
Annemieke Van Haver ◽  
Matthias Vanhees ◽  
Roger van Riet ◽  
Frederik Verstreken
Keyword(s):  
Upper Limb ◽  
Three Dimensional ◽  
Computer Software ◽  
Operation Time ◽  
Cost Benefit ◽  
Added Value ◽  
Patient Specific ◽  
Technical Developments ◽  
Key Factor ◽  
Patient Specific Instruments

In malunion cases, restoration of anatomy is a key factor in obtaining a good functional outcome, but this can be technically very challenging. Three-dimensional printed bone models can further improve understanding of the malunion pattern. The use of three-dimensional (3D) computer planning, and the assembly of patient-specific instruments and implants, especially in complex deformities of the upper limb, allow accurate correction while reducing operation time, blood loss volume and radiation exposure during surgery. One of the major disadvantages of the 3D technique is the additional cost because it requires specific computer software, a dedicated clinical engineer, and a 3D printer. Further technical developments and clinical investigations are necessary to better define the added value and cost/benefit relationship of 3D in the treatment of complex fractures, non-unions, and malunions. Cite this article: EFORT Open Rev 2019;4 DOI: 10.1302/2058-5241.4.180074

scholarly journals Use of a three-dimensional printed anatomical model for tumor management in a pediatric patient

2020 ◽  
Vol 8 ◽  
pp. 2050313X2092760
Author(s):  
David Salazar ◽  
Trevor J. Huff ◽  
Justin Cramer ◽  
Lincoln Wong ◽  
Gabe Linke ◽  
...  
Keyword(s):  
Pediatric Patient ◽  
Clinical Education ◽  
Three Dimensional ◽  
Region Of Interest ◽  
Operation Time ◽  
Patient Specific ◽  
Anatomical Model ◽  
Three Dimensional Printing ◽  
Tumor Management ◽  
New Applications

The purpose of this study was to investigate the usage of an anatomical model to improve surgical planning of a complex schwannoma resection. As advancements in additive manufacturing continue to prosper, new applications of this valuable technology are being implemented in the medical field. One of the most recent applications has been in the development of patient-specific anatomical models for unique clinical education as well as for preoperative planning. In this case, a multidisciplinary team with expertise in research, three-dimensional printing, and medicine was formed to develop a three-dimensional printed model that could be used to help plan the reduction of a tumor from the cervical spine of a pediatric patient. Image segmentation and stereolithography creation were accomplished using Mimics and 3-matic, respectively. Models were developed on two different printer types to view different aspects of the region of interest. Reports from the operating surgeon indicated that the model was instrumental in the planning procedures of the operation and reducing operation time.

scholarly journals Correction of complex three-dimensional deformities at the proximal femur using indirect reduction with angle blade plate and patient-specific instruments: a technical note

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Lukas Jud ◽  
Lazaros Vlachopoulos ◽  
Karl Grob
Keyword(s):  
Proximal Femur ◽  
Three Dimensional ◽  
Orthopedic Procedures ◽  
Patient Specific ◽  
Indirect Reduction ◽  
Subvastus Approach ◽  
Blade Plate ◽  
Patient Specific Instruments ◽  
Angle Blade ◽  
Angle Blade Plate

Abstract Background Corrective osteotomies for complex proximal femoral deformities can be challenging; wherefore, subsidies in preoperative planning and during surgical procedures are considered helpful. Three-dimensional (3D) planning and patient-specific instruments (PSI) are already established in different orthopedic procedures. This study gives an overview on this technique at the proximal femur and proposes a new indirect reduction technique using an angle blade plate. Methods Using computed tomography (CT) data, 3D models are generated serving for the preoperative 3D planning. Different guides are used for registration of the planning to the intraoperative situation and to perform the desired osteotomies with the following reduction task. A new valuable tool to perform the correction is the use of a combined osteotomy and implant-positioning guide, with indirect deformity reduction over an angle blade plate. Results An overview of the advantages of 3D planning and the use of PSI in complex corrective osteotomies at the proximal femur is provided. Furthermore, a new technique with indirect deformity reduction over an angle blade plate is introduced. Conclusion Using 3D planning and PSI for complex corrective osteotomies at the proximal femur can be a useful tool in understanding the individual deformity and performing the aimed deformity reduction. The indirect reduction over the implant is a simple and valuable tool in achieving the desired correction, and concurrently, surgical exposure can be limited to a subvastus approach.

scholarly journals The use of three-dimensional printing technology in orthopaedic surgery

2017 ◽  
Vol 25 (1) ◽  
pp. 230949901668407 ◽  
Author(s):  
Tak Man Wong ◽  
Jimmy Jin ◽  
Tak Wing Lau ◽  
Christian Fang ◽  
Chun Hoi Yan ◽  
...  
Keyword(s):  
Orthopaedic Surgery ◽  
Surgical Planning ◽  
Three Dimensional ◽  
Physical Models ◽  
Advanced Technology ◽  
Patient Specific ◽  
Printing Technology ◽  
Three Dimensional Printing ◽  
Facial Surgery ◽  
Patient Specific Instruments

Three-dimensional (3-D) printing or additive manufacturing, an advanced technology that 3-D physical models are created, has been wildly applied in medical industries, including cardiothoracic surgery, cranio-maxillo-facial surgery and orthopaedic surgery. The physical models made by 3-D printing technology give surgeons a realistic impression of complex structures, allowing surgical planning and simulation before operations. In orthopaedic surgery, this technique is mainly applied in surgical planning especially revision and reconstructive surgeries, making patient-specific instruments or implants, and bone tissue engineering. This article reviews this technology and its application in orthopaedic surgery.

Numerical Simulation of Instantaneous Wave-Free Ratio of Stenosed Coronary Artery

2019 ◽  
Vol 16 (03) ◽  
pp. 1842009 ◽  
Author(s):  
Wenxin Wang ◽  
Boyan Mao ◽  
Bao Li ◽  
Xi Zhao ◽  
Chensi Xu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Coronary Artery ◽  
Functional Performance ◽  
Geometric Model ◽  
False Positive Rate ◽  
Three Dimensional ◽  
Cost Benefit ◽  
Simulation Method ◽  
Patient Specific ◽  
Three Dimensional Model

Instantaneous wave-free ratio (iFR), an invasive index of coronary artery tree, can evaluate the functional performance of vascular stenosis without pharmacological vasodilators. The noninvasive assessment of diameter stenosis (DS) obtained from coronary computed tomography angiography (CTA) has high false positive rate in contrast to iFR. The aim of this study was to develop a numerical simulation method that predicts the iFR and noninvasively assess the myocardial ischemia. Based on the CTA images, a patient-specific three-dimensional model of the aorta and coronary arteries were reconstructed. A stenosis was created in the left anterior descending artery (LAD) by reducing the DS of geometric model (40%, 50%, 60%, 75% and 90%). The patient-specific LPM boundary condition were set up to compute iFRct value during the wave-free period at the resting condition. The computed pressure and flow of coronary artery were realistic as compared to literature data. In contrast to invasive iFR, the iFRct can make a cost-benefit balance in terms of clinical cost and patient’s health.

Three-Dimensional Reconstruction of the Sphenoid Sinus Anatomy for Presurgical Planning with Free OSIRIX Software

2021 ◽  
Author(s):  
Javier Abarca-Olivas ◽  
Patrick Bärtschi ◽  
Irene Monjas-Cánovas ◽  
Pablo González-López ◽  
Elena García-Garrigós ◽  
...  
Keyword(s):  
3D Reconstruction ◽  
Sphenoid Sinus ◽  
Three Dimensional ◽  
Computer Software ◽  
Region Of Interest ◽  
Pituitary Surgery ◽  
Point Of View ◽  
Anatomical Reconstruction ◽  
Interest Points ◽  
Key Factor

Abstract Background A preoperative three-dimensional (3D) surgical field understanding remains a key factor to achieve safer endonasal transsphenoidal endoscopic approaches (ETSE). The aim of this article is to describe how we can get a reliable 3D sphenoidal anatomical reconstruction for surgical planning by using a user-friendly, accurate, and free image software. Methods and Materials Free computer software (OSIRIX Medical Imaging Software) was used to create in a personal computer a three-dimensional (3D) reconstruction of the sphenoid sinus (SS) based on head computed tomography angiographies (CTAs) from a series of 67 patients who were operated for sellar tumors during a 4-year period (March 2016 to March 2020). The aim of the 3D reconstruction with OSIRIX was to reveal preoperatively the most important intrasphenoidal structures seen from the endonasal point of view. Results The intraoperative visible sphenoidal structures were previously recognized in the virtual 3D reconstructed image with 100% of specificity (SP) and positive predictive value. The OSIRIX view by using region of interest points allowed us to see preoperatively the internal carotid artery parasellar course even in those cases in which it was hidden by bone or tumor. Moreover, the 3D reconstruction was able to provide a clear differentiation between the tumor and the pituitary gland when both structures were in contact with the sellar floor. Conclusion Our experience with the OSIRIX software from CTA as preoperative planning for endonasal pituitary surgery was valuable, because it gave us access in simple way to a free and reliable 3D image of the SS.

Prosthetic Accuracy Depends on the Design of Patient-Specific Instrumentation: Results of a Retrospective Study Using Three-Dimensional Imaging

2020 ◽  
Author(s):  
Kazumasa Yamamura ◽  
Fumiaki Inori ◽  
Sadahiko Konishi
Keyword(s):  
Sagittal Plane ◽  
Three Dimensional ◽  
Computer Software ◽  
Patient Specific ◽  
Ct Image ◽  
3D Ct ◽  
Patient Specific Instrumentation ◽  
Prosthetic Alignment ◽  
Before And After ◽  
Preoperative Plan

AbstractTo determine accuracy of patient-specific instrumentation (PSI), the preoperative three-dimensional (3D) plan should be superimposed on the postoperative 3D image to compare prosthetic alignment. We aimed to compare prosthetic alignment on a preoperative 3D computed tomography (CT) plan and postoperative 3D-CT image, and evaluate the accuracy of PSI during total knee arthroplasty (TKA). Thirty consecutive knees (30 patients) who underwent TKA using PSI were retrospectively evaluated. The preoperative plan was prepared using 3D CT acquisitions of the hip, knee, and ankle joints. The postoperative 3D CT image obtained 1 week after surgery was superimposed onto the preoperative 3D plan using computer software. Differences in prosthetic alignment between the preoperative and postoperative images were measured using six parameters: coronal, sagittal, and axial alignments of femoral and tibial prostheses. Differences in prosthetic alignment greater than 3 degrees were considered outliers. Two observers performed all measurements. All parameters were repeatedly measured over a 4-week interval. This measurement method's intraobserver and interobserver reliabilities were more than 0.81 (very good). For the femoral and tibial prostheses, absolute differences between the preoperative and postoperative 3D CT images were significantly larger in the sagittal than in the coronal and axial planes (p < 0.001). The outlier rate for the sagittal alignment of femoral and tibial prostheses was significantly higher than that for the alignment of coronal and axial planes (p < 0.001). However, there were no significant differences in the range of motion (ROM) before and after TKA when comparing cases with and without outliers in the sagittal plane. Even though the present study did not reveal any issues with the ROM that depended on the presence of an outlier, accurate verification of prosthetic alignment for individual PSI models may be necessary because the designs, referenced images, and accuracy are different in each model.

scholarly journals Tumor resection at the pelvis using three-dimensional planning and patient-specific instruments: a case series

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Thorsten Jentzsch ◽  
Lazaros Vlachopoulos ◽  
Philipp Fürnstahl ◽  
Daniel A. Müller ◽  
Bruno Fuchs
Keyword(s):  
Tumor Resection ◽  
Three Dimensional ◽  
Case Series ◽  
Patient Specific ◽  
Patient Specific Instruments

scholarly journals Efficacy evaluation of three-dimensional printing assisted osteotomy guide plate in accurate osteotomy of adolescent cubitus varus deformity

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Yuan-Wei Zhang ◽  
Xin Xiao ◽  
Wen-Cheng Gao ◽  
Yan Xiao ◽  
Su-Li Zhang ◽  
...  
Keyword(s):  
3D Printing ◽  
Blood Loss ◽  
Three Dimensional ◽  
Operation Time ◽  
Varus Deformity ◽  
Conventional Group ◽  
Intraoperative Blood Loss ◽  
Cubitus Varus ◽  
Guide Plate ◽  
Significant Difference

Abstract Background This present study is aimed to retrospectively assess the efficacy of three-dimensional (3D) printing assisted osteotomy guide plate in accurate osteotomy of adolescent cubitus varus deformity. Material and methods Twenty-five patients (15 males and 10 females) with the cubitus varus deformity from June 2014 to December 2017 were included in this study and were enrolled into the conventional group (n = 11) and 3D printing group (n = 14) according to the different surgical approaches. The operation time, intraoperative blood loss, osteotomy degrees, osteotomy end union time, and postoperative complications between the two groups were observed and recorded. Results Compared with the conventional group, the 3D printing group has the advantages of shorter operation time, less intraoperative blood loss, higher rate of excellent correction, and higher rate of the parents’ excellent satisfaction with appearance after deformity correction (P < 0.001, P < 0.001, P = 0.019, P = 0.023). Nevertheless, no significant difference was presented in postoperative carrying angle of the deformed side and total complication rate between the two groups (P = 0.626, P = 0.371). Conclusions The operation assisted by 3D printing osteotomy guide plate to correct the adolescent cubitus varus deformity is feasible and effective, which might be an optional approach to promote the accurate osteotomy and optimize the efficacy.

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