scholarly journals A New Diagnostic Approach for Periprosthetic Acetabular Fractures Based on 3D Modeling: A Study Protocol

Diagnostics ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 15 ◽  
Author(s):  
Giuseppe Marongiu ◽  
Roberto Prost ◽  
Antonio Capone
Keyword(s):  
Bone Quality ◽  
3D Modeling ◽  
Surgical Simulation ◽  
Articular Surface ◽  
Real Life ◽  
Diagnostic Process ◽  
Acetabular Fractures ◽  
Loss Assessment ◽  
Metal Artifacts ◽  
Modeling Software

Periprosthetic acetabular fractures after total hip arthroplasty (THA) are mostly related to low energy trauma reduced bone quality. CT-scan is widely used to evaluate acetabular fractures, however, metal artifacts produced prosthetic implants limit the visualization of the articular surface and bone loss assessment. 3D modeling software allows us to creating tridimensional images of the bony surface, removing the metallic implants trough image segmentation. We highlight the use of 3D modeling and rapid prototyping (3D printing) for the diagnostic process of periprosthetic acetabular fracture around THA. 3D modeling software was used to improve the assessment of fracture morphology and bone quality. Moreover, the 3D images were printed in a real-life size model and used for preoperative implant templating, sizing and surgical simulation.

scholarly journals Use of 3D modelling and 3D printing for the diagnostic process, decision making and preoperative planning of periprosthetic acetabular fractures

2020 ◽  
Vol 13 (1) ◽  
pp. e233117 ◽  
Author(s):  
Giuseppe Marongiu ◽  
Roberto Prost ◽  
Antonio Capone
Keyword(s):  
Bone Loss ◽  
Bone Quality ◽  
Surgical Simulation ◽  
Articular Surface ◽  
Real Life ◽  
Fracture Morphology ◽  
Fracture Pattern ◽  
3D Modelling ◽  
Diagnostic Process ◽  
Acetabular Fractures

Periprosthetic acetabular fractures represent an uncommon but challenging complication of total hip arthroplasty (THA), mostly related to low-energy trauma and pathological conditions that reduce bone quality. Therefore, particularly in elderly patients, these fractures are associated with periprosthetic osteolysis and bone loss. CT scan is considered the gold standard to define the fracture pattern; however, the presence of the prosthetic implants in situ limits the full view of the articular surface and bone loss. A three-dimensional (3D) modelling software allows precise tridimensional reconstructions of the bony surface, virtually removing the metallic implants trough DICOM image segmentation. We highlight the case of a periprosthetic acetabular fracture around THA which occurred to a 75-year-old woman, in which a 3D modelling software was used to improve the assessment of fracture morphology and bone quality. Moreover, the 3D images were printed in a real-life size model and were used for preoperative implant templating, sizing and surgical simulation.

scholarly journals The influence of bone quality on radiological outcome in 50 consecutive acetabular fractures treated with a pre-contoured anatomic suprapectineal plate

2021 ◽  
Author(s):  
Maximilian J. Hartel ◽  
Tareq Naji ◽  
Florian Fensky ◽  
Frank O. Henes ◽  
Darius M. Thiesen ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Bone Mass ◽  
Bone Quality ◽  
Hip Arthroplasty ◽  
Mass Density ◽  
Acetabular Fractures ◽  
Bone Mass Density ◽  
Radiological Outcome ◽  
Total Hip ◽  
The Impact

Abstract Purpose To investigate the range of indications of an anatomical-preshaped three-dimensional suprapectineal plate and to assess the impact of the bone mass density on radiologic outcomes in different types of acetabular fractures. Patients and methods A consecutive case series of 50 acetabular fractures (patient age 69 ± 23 years) treated with suprapectineal anatomic plates were analyzed in a retrospective study. The analysis included: Mechanism of injury, fracture pattern, surgical approach, need for additional total hip arthroplasty, intra- or postoperative complications, as well as bone mass density and radiological outcome on postoperative computed tomography. Results Most frequently, anterior column fracture patterns with and without hemitransverse components as well as associated two column fractures were encountered. The anterior intrapelvic approach (AIP) was used in 98% (49/50) of the cases as primary approach with additional utilization of the first window of the ilioinguinal approach in 13/50 cases (26%). Determination of bone density revealed impaired bone quality in 70% (31/44). Postoperative steps and gaps were significantly greater in this subgroup (p < 0.05). Fracture reduction quality for postoperative steps revealed anatomic results in 92% if the bone quality was normal and in 46% if impaired (p < 0.05). In seven cases (14%), the plate was utilized in combination with acute primary arthroplasty. Conclusion A preshaped suprapectineal plate provides good radiological outcomes in a variety of indications in a predominantly geriatric cohort. Impaired bone quality has a significantly higher risk of poor reduction results. In cases with extensive joint destruction, the combination with total hip arthroplasty was a valuable option.

scholarly journals 267 Ascertain Impact of Using Low-Fidelity Simulation Scenarios in Preparation for Practical Surgical Finals

2021 ◽  
Vol 108 (Supplement_2) ◽  
Author(s):  
M Awan
Keyword(s):  
Surgical Simulation ◽  
Positive Impact ◽  
Real Life ◽  
Surgical Emergencies ◽  
Operative Complications ◽  
Medical Emergencies ◽  
Structured Approach ◽  
Acute Patients ◽  
Kinaesthetic Learning ◽  
Post Operative Complications

Abstract Introduction Simulation has become the new way of preparing doctors to deal with medical emergencies, we investigate it using in managing ward-based surgical emergencies. Method Final year medical students completed pre- and post-session questionnaires related to themes of preparedness, anxiousness, and confidence in management of acute surgical presentations versus post-operative complications. The intervention was divided into classroom based teaching and common surgical scenarios enacted using Sim-Man. Results Preparedness increased by a third following participation in surgical simulation scenarios among participants. Anxiousness related to surgical finals decreased by 9%. Confidence in managing acute patients increased by 25% compared to pre-session results. Moreover, 35% of participants felt more confident in managing post-operative complications after the session. On average, participants scored 8/10 for usefulness of the sessions in highlighting areas to concentrate focus upon during revision. Conclusions Simulation is slowly becoming a staple in undergraduate training and our results emphasise positive impact of using this as a revision tool. Kinaesthetic learning is more memorable during simulation which serves as a confidence boost in self-perception of managing both acute and post-operative surgical patients. Anxiety associated with exams and managing real-life emergencies can be dampened by rehearsing scenarios and following a structured approach as championed by medical simulation.

Main Structure Design on Dual-Purpose Move-Assistant Device of Wheelchair and Crutch on SolidWorks

2012 ◽  
Vol 482-484 ◽  
pp. 2148-2152
Author(s):  
Cong Wei Yang ◽  
Hai Tao Wu ◽  
Hong Bin Liu
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Structure Design ◽  
Model Design ◽  
Work Time ◽  
Dual Purpose ◽  
Main Structure ◽  
Modeling Software ◽  
Design Requirements

Established the model of dual-purpose move-assistant device of wheelchair and crutch, using 3D modeling software SolidWorks, finished the 3D model of parts and parts assembly according to the design requirements of dual-purpose move-assistant device of wheelchair and crutch. Verified the accuracy of designing the project. With the software to carry on a 3D model design can save work time and economize the design budget, providing the theoretical feasibility of realizing the dual-purpose move-assistant device of wheelchair and crutch.

scholarly journals The Accuracy of Digital Face Scans Obtained from 3D Scanners: An In Vitro Study

2019 ◽  
Vol 16 (24) ◽  
pp. 5061 ◽  
Author(s):  
Pokpong Amornvit ◽  
Sasiwimol Sanohkan
Keyword(s):  
3D Modeling ◽  
In Vitro Study ◽  
Reference Points ◽  
Vitro Study ◽  
Washington Dc ◽  
Practical Applications ◽  
Face Scanning ◽  
Modeling Software ◽  
The Face

Face scanners promise wide applications in medicine and dentistry, including facial recognition, capturing facial emotions, facial cosmetic planning and surgery, and maxillofacial rehabilitation. Higher accuracy improves the quality of the data recorded from the face scanner, which ultimately, will improve the outcome. Although there are various face scanners available on the market, there is no evidence of a suitable face scanner for practical applications. The aim of this in vitro study was to analyze the face scans obtained from four scanners; EinScan Pro (EP), EinScan Pro 2X Plus (EP+) (Shining 3D Tech. Co., Ltd. Hangzhou, China), iPhone X (IPX) (Apple Store, Cupertino, CA, USA), and Planmeca ProMax 3D Mid (PM) (Planmeca USA, Inc. IL, USA), and to compare scans obtained from various scanners with the control (measured from Vernier caliper). This should help to identify the appropriate scanner for face scanning. A master face model was created and printed from polylactic acid using the resolution of 200 microns on x, y, and z axes and designed in Rhinoceros 3D modeling software (Rhino, Robert McNeel and Associates for Windows, Washington DC, USA). The face models were 3D scanned with four scanners, five times, according to the manufacturer’s recommendations; EinScan Pro (Shining 3D Tech. Co., Ltd. Hangzhou, China), EinScan Pro 2X Plus (Shining 3D Tech. Co., Ltd. Hangzhou, China) using Shining Software, iPhone X (Apple Store, Cupertino, CA, USA) using Bellus3D Face Application (Bellus3D, version 1.6.2, Bellus3D, Inc. Campbell, CA, USA), and Planmeca ProMax 3D Mid (PM) (Planmeca USA, Inc. IL, USA). Scan data files were saved as stereolithography (STL) files for the measurements. From the STL files, digital face models are created in the computer using Rhinoceros 3D modeling software (Rhino, Robert McNeel and Associates for Windows, Washington DC, USA). Various measurements were measured five times from the reference points in three axes (x, y, and z) using a digital Vernier caliper (VC) (Mitutoyo 150 mm Digital Caliper, Mitutoyo Co., Kanagawa, Japan), and the mean was calculated, which was used as the control. Measurements were measured on the digital face models of EP, EP+, IPX, and PM using Rhinoceros 3D modeling software (Rhino, Robert McNeel and Associates for Windows, Washington DC, USA). The descriptive statistics were done from SPSS version 20 (IBM Company, Chicago, USA). One-way ANOVA with post hoc using Scheffe was done to analyze the differences between the control and the scans (EP, EP+, IPX, and PM). The significance level was set at p = 0.05. EP+ showed the highest accuracy. EP showed medium accuracy and some lesser accuracy (accurate until 10 mm of length), but IPX and PM showed the least accuracy. EP+ showed accuracy in measuring the 2 mm of depth (diameter 6 mm). All other scanners (EP, IPX, and PM) showed less accuracy in measuring depth. Finally, the accuracy of an optical scan is dependent on the technology used by each scanner. It is recommended to use EP+ for face scanning.

Pressure Generated from Head Garment with Padding Insert Used for Hypertrophic Scar Treatment

2015 ◽  
Vol 815 ◽  
pp. 282-286
Author(s):  
A.F. Aiman ◽  
M.N. Salleh ◽  
K.A. Ismail
Keyword(s):  
Pressure Distribution ◽  
Cross Sections ◽  
3D Modeling ◽  
Hypertrophic Scar ◽  
Pressure Range ◽  
Burn Injury ◽  
Reduction Factor ◽  
Modeling Software ◽  
Facial Area ◽  
Non Surgical Treatment

Pressure garment is a standard non-surgical treatment for hypertrophic scar caused by burn injury. However, the main problem identified was the non-uniform pressure distribution due to the complexity of the contour at the facial area. Therefore, padding was developed to produce more efficient pressure distribution. This study used 3D scanning apparatus to obtain the cross sections of the facial area. The padding was developed using 3D modeling software which act as an insert to fill the gaps at the contact area of the garment and facial areas. The result shows that by inserting the padding underneath the garment, the pressure outputs indicate an acceptable pressure range with the suitable reduction factor for the head garment fabrication.

Design and Research of Synchronous-Style Clamping Mechanism for Cable-Detecting Robot

2014 ◽  
Vol 1028 ◽  
pp. 127-133
Author(s):  
Bing Hui Wu ◽  
Jian Jun Xi
Keyword(s):  
3D Modeling ◽  
Design Criterion ◽  
Velocity Curve ◽  
Displacement Curve ◽  
Robot Design ◽  
Clamping Force ◽  
Broad Application ◽  
Labor Practices ◽  
Modeling Software ◽  
Application Prospects

Cable-detecting robot can replace human to accomplish various dangerous works. Comparing with labor practices, the robot not only reduce costs greatly but also guarantee the safety of workers. Thus, it is of broad application prospects. To assure the reliable action of the robot on the rope, a synchronous-style plane for clamping mechanism was proposed in this paper. According to the operation requirements of the robot, design criterion of clamping-force of this lock-mechanism was prompted. Utilizing 3D modeling software Pro/E, simulation model of synchronous clamping mechanism was built. And then displacement curve, velocity curve and acceleration curve will be obtained from the clamping mechanism output.

Study on Parametric Reverse Modeling

2014 ◽  
Vol 721 ◽  
pp. 230-233
Author(s):  
Shuang Xi Hu
Keyword(s):  
Reverse Engineering ◽  
3D Modeling ◽  
Point Clouds ◽  
Hybrid Modeling ◽  
Design Intent ◽  
Engineering Software ◽  
Modeling Software

Methods about parametric reverse modeling have been studied based on products’ point clouds by comparing model rebuilding processes in different ways, such as collaborative reconstruction based on both reverse engineering software Geomagic and 3D modeling software, reverse and forward hybrid modeling based on Rapidform. It‘s concluded that reverse and forward hybrid modeling based on Rapidform takes more advantages in parametric reverse modeling, It is more rapid , accurate, and closer to the design intent.

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