Computer-aided Design Technology Research Articles

Enhancing large-span structure design and maintenance through the synergy of CAD, BIM, and IoT-AI technologies

The integration of Computer-Aided Design (CAD), Building Information Modeling (BIM), and Internet of Things (IoT) with Artificial Intelligence (AI) represents a transformative shift in the architectural and engineering practices for large-span structures. This paper delves into the quantitative and qualitative enhancements brought about by these technologies, focusing on their pivotal roles in design precision, structural analysis, project management, and maintenance strategies. CAD's evolution from simple drafting to complex 3D modeling has significantly reduced design time and errors, while its integration with structural analysis software has improved load distribution accuracy and material cost efficiency. BIM's contribution to design, construction, and sustainability emphasizes optimized resource allocation and energy-efficient practices. Furthermore, IoT and AI's role in real-time monitoring and predictive maintenance underpins a proactive approach to structural health, ensuring longevity and safety. Through statistical analysis, mathematical modeling, and case studies, this paper highlights the synergistic impact of these technologies on reducing project timelines, enhancing collaboration, and fostering innovation in large-span structure engineering. The findings advocate for a multidisciplinary approach, combining engineering expertise with advanced computational tools to achieve superior outcomes in the construction and maintenance of large-span structures.

Posterior endpoint determination of the lumbar pedicle central axis on the anterior–posterior fluoroscopic image for pedicle screw insertion

The transpedicular procedure has been widely used in spinal surgery. The determination of the best entry point is the key to perform a successful transpedicular procedure. Various techniques have been used to determine this point, but the results are variable. This study was carried out to determine the posterior endpoint of the lumbar pedicle central axis on the standard anterior–posterior (AP) fluoroscopic images. Computer-aided design technology was used to determine the pedicle central axis and the posterior endpoint of the pedicle central axis on the posterior aspect of the vertebra. The standard AP fluoroscopic image of the lumbar vertebral models by three-dimensional printing was achieved. The endpoint projection on the AP fluoroscopic image was determined in reference to the pedicle cortex projection by the measurements of the angle and distance on the established X–Y coordinate system of the radiologic image. The projection of posterior endpoint of the lumbar pedicle central axis were found to be superior to the X-axis of the established X–Y coordinate system and was located on the pedicle cortex projection on the standard AP fluoroscopic image of the vertebra. The projection point was distributed in different sectors in the coordinate system. It was located superior to the X-axis by 18° to 26° at L1, while they were located superior to the X-axis by 12° to 14° at L2 to L5. The projections of posterior endpoints of the lumbar pedicle central axis were located in different positions on the standard AP fluoroscopic image of the vertebra. The determination method of the projection point was helpful for selecting an entry point for a transpedicular procedure with a fluoroscopic technique.

Effect of a novel mesh design and the sandblasting technique on the bond strength of computer-designed and three-dimension laser printed resin bonded bridges: an in vitro study

Resin-bonded bridges (RBBs) are a minimally invasive and aesthetically pleasing treatment modality. However, their frequent failure has posed challenges for both dental professionals and patients. This necessitates the exploration of innovative strategies to enhance the longevity of RBBs. This study aimed to assess the bond strength of a mesh bridge fabricated using computer-aided design and three-dimensional (3D) printing technology in comparison to the traditional aluminum oxide sandblasting method. A total of 48 lower incisors were embedded in acrylic bases according to a standardized computer-generated model to receive 24 metal RBBs. The two groups underwent distinct metal surface treatments: the 3D mesh novel design and sandblasting with aluminum oxide particles sized at 250.00 µm. The bond strength of the bridges was evaluated, and statistical analysis was performed using the independent samples t-test with a significance level set at α = 0.05. The findings revealed a significant difference between the two methods (p < 0.001). The 3D mesh design exhibited a mean bond strength of 387.89 ± 24.15 N, while the sandblasting technique yielded a mean value of 161.46 ± 31.25 N. In summary, the 3D mesh design substantially enhanced the bond strength of RBBs compared to the traditional sandblasting technique.

Dynamic Simulation and Real-time Rendering of Environmental Design Using Computer-aided Design and Multimedia Technology

Dynamic Simulation and Real-time Rendering of Environmental Design Using Computer-aided Design and Multimedia Technology

An Intelligent Optimization Algorithm for Enhancing the Perception of Marine Brand Image Using Computer-Aided Design and Multimedia Technology

An Intelligent Optimization Algorithm for Enhancing the Perception of Marine Brand Image Using Computer-Aided Design and Multimedia Technology

Intelligent Analysis and Dynamic Display of Packaging Design Using Computer-Aided Design and Multimedia Technology

Intelligent Analysis and Dynamic Display of Packaging Design Using Computer-Aided Design and Multimedia Technology

Polymer-Infiltrated Ceramic Network Produced by Direct Ink Writing: The Effects of Manufacturing Design on Mechanical Properties

Polymer-infiltrated ceramic network (PICN) materials have gained considerable attention as tooth-restorative materials due to their mechanical compatibility with human teeth, especially with computer-aided design and computer-aided manufacturing (CAD/CAM) technologies. However, the designed geometry affects the mechanical properties of PICN materials. This study aims to study the relationship between manufacturing geometry and mechanical properties. In doing so, zirconia-based PICN materials with different geometries were fabricated using a direct ink-writing process, followed by copolymer infiltration. Comprehensive analyses of the microstructure and structural properties of zirconia scaffolds, as well as PICN materials, were performed. The mechanical properties were assessed through compression testing and digital image correlation analysis. The results revealed that the compression strength of PICN pieces was significantly higher than the respective zirconia scaffolds without polymer infiltration. In addition, two geometries (C-grid 0 and C-grid 45) have the highest mechanical performance.

Digitalization in Periodontics: Unlocking Potential and Possibilities

The field of periodontics has undergone a transformative evolution with the integration of digital technologies. This abstract explores the impact of digitalization on periodontics, focusing on key aspects such as diagnostics, treatment planning, and patient engagement. Digital imaging, including digital radiography and intraoral scanners, has revolutionized the precision and efficiency of periodontal diagnostics. Computer-Aided Design and Manufacturing (CAD/CAM) technologies have enhanced treatment planning, allowing for customized and accurate solutions in periodontal interventions. Teledentistry has emerged as a valuable tool, facilitating remote consultations and increasing accessibility to periodontal care. Electronic Health Records (EHRs) streamline patient management, improving communication among healthcare providers. Precision dentistry, guided by advanced software, ensures optimal outcomes in periodontal surgeries. The incorporation of augmented and virtual reality in periodontal education enhances the learning experience for students and professionals. Digital platforms, such as websites and mobile apps, play a pivotal role in patient engagement and education, empowering individuals to actively participate in their periodontal health. As digitalization continues to advance, periodontics stands at the forefront of innovation, offering a more efficient, precise, and patient-centric approach to the prevention and treatment of periodontal diseases. Keywords: Teledentistry, Electronic health records, Artificial Intelligence, 3D printing, Digital Imaging, Periodontal disease

Concept for Parameter Design and Optimization of Surface Acoustic Wave Devices

Concept for Parameter Design and Optimization of Surface Acoustic Wave Devices

Comparative Accuracy of Intraoral and Extraoral Digital Workflows for Short Span Implant Supported Fixed Partial Denture Fabrication: An In Vitro Study.

BACKGROUND The advent of digital impressions using computer-aided design and manufacturing technology (CAD/CAM) has simplified and improved the fabrication of implant prostheses in dentistry. The conventional impression has several drawbacks, including tray selection, material type, impression technique, impression disinfection, and cast model storage. The inaccuracies caused by distortion and contraction of impression material can be minimized with digital impressions. This study aimed to compare digital dental impressions of 10 working casts made using the Pindex laser removable die system to fabricate parallel drill channels vs 10 working casts made using the Di-Lok plastic tray removable die system. MATERIAL AND METHODS An implant master die with 2 dental implant analogs was fabricated. Ten working casts using the Pindex laser removable die system with parallel drill channels and 10 working casts using the Di-Lok plastic tray removable die system were fabricated. The working casts were scanned using an extra-oral laboratory scanner and the implant master model was scanned with an intra-oral scanner. RESULTS The properties of the casts made using the 2 systems were evaluated and analyzed with ANOVA and post hoc Tukey test. The mean horizontal linear distances between A1B1 (P<0.021), A2B2 (P<0.018), C1D1 (P<0.026), C2D2 (P<0.03), B1C1 (P<0.01), and mean vertical distances between B1A2 (P<0.015), C1D2 (P<0.001), B1B2 (P<0.028), and C1C2 (P<0.001) were significantly different between the Pindex system and Di-Lok tray system as compared to intra-oral scans. CONCLUSIONS Complete digital workflow with intra-oral scans were more than the partial digital workflow with extra-oral scans for the Pindex system and Di-Lok tray systems.

Lysine-Specific Demethylase 1 Inhibitors: A Comprehensive Review Utilizing Computer-Aided Drug Design Technologies.

Lysine-specific demethylase 1 (LSD1/KDM1A) has emerged as a promising therapeutic target for treating various cancers (such as breast cancer, liver cancer, etc.) and other diseases (blood diseases, cardiovascular diseases, etc.), owing to its observed overexpression, thereby presenting significant opportunities in drug development. Since its discovery in 2004, extensive research has been conducted on LSD1 inhibitors, with notable contributions from computational approaches. This review systematically summarizes LSD1 inhibitors investigated through computer-aided drug design (CADD) technologies since 2010, showcasing a diverse range of chemical scaffolds, including phenelzine derivatives, tranylcypromine (abbreviated as TCP or 2-PCPA) derivatives, nitrogen-containing heterocyclic (pyridine, pyrimidine, azole, thieno[3,2-b]pyrrole, indole, quinoline and benzoxazole) derivatives, natural products (including sanguinarine, phenolic compounds and resveratrol derivatives, flavonoids and other natural products) and others (including thiourea compounds, Fenoldopam and Raloxifene, (4-cyanophenyl)glycine derivatives, propargylamine and benzohydrazide derivatives and inhibitors discovered through AI techniques). Computational techniques, such as virtual screening, molecular docking and 3D-QSAR models, have played a pivotal role in elucidating the interactions between these inhibitors and LSD1. Moreover, the integration of cutting-edge technologies such as artificial intelligence holds promise in facilitating the discovery of novel LSD1 inhibitors. The comprehensive insights presented in this review aim to provide valuable information for advancing further research on LSD1 inhibitors.

Current Status and Analysis of the Clinical Application of Digital Technology in Oral Medicine

With the increasing maturity and popularization of digital technology in oral medicine, its application has now expanded to various clinical subspecialties of oral medicine. Digitalization has become one of the important development directions of oral medicine. What is the current development status of digital technology in oral medicine? In what ways is digital technology applied across various clinical specialties of oral medicine? Dentists are particularly concerned about these issues in their clinical work and research. In this paper, all the digital technologies applied in oral medicine are organized and categorized from a technical perspective. In this paper, we focused on presenting three-dimensional data acquisition technology, dental computer-aided design technology, dental computer-aided processing technology, and oral surgery implementation technology. Their technical principles, technical characteristics, applications in oral medicine, a secondary discipline of medicine, and the development status of domestically-developed technology are described and reviewed in detail. The other technologies such as oral digital materials, oral virtual simulation teaching, and oral multi-source data management are briefly discussed. We intend to provide references for dentists to apply digital technology in clinical practice and research.

The transformative role of computer-aided design technology in innovation in the apparel industry

Abstract With its unique advantages, computers are applied to various fields, and the garment industry is no exception. The study explores the role of computer-aided design technology in the apparel industry from the perspective of apparel design, production, and sales. We aim to evaluate the effect of computer technology on clothing design and production by constructing a clothing style migration model based on CycleGAN and evaluating its image style migration effect and aesthetic quality. Then, after completing the research design, we analyze the effect of virtual fitting rooms on consumers’ purchase intentions so as to support the role of computer technology in clothing sales. According to the findings, the clothing style migration model’s generated images are of excellent quality, with an average evaluation score of 6.68, and are acknowledged by nearly 80% of the respondents. All four characteristic elements of the virtual fitting room positively and significantly affect consumers’ purchase intention at the level of 0.01, and perceived risk and perceived value play a mediating role, which explains the process of generating consumers’ apparel purchase intention based on the virtual fitting room. Computer-aided design technology can be utilized effectively in apparel design to boost apparel sales and foster the transformation and advancement of the apparel industry.

Information modeling of the foundation of a special-purpose industrial building

The paper considers the peculiarities of construction of special structures based on individual projects and requiring non-standard approaches to design and calculation due to unique loads and impacts on the structure. The author emphasizes the importance of transferring design to the field of virtual building information model (BIM) to ensure a high level of detail, accurate calculation of materials and works, as well as the possibility of making changes to the BIM model for further monitoring of the life cycle of the structure. It is noted that the use of BIM programs allows to effectively take into account all components of the structure and minimizes technical errors in the coordination of engineering networks with structural drawings. The purpose of this paper is to analyze the results of building design using computer-aided design (CAD) and building information modeling (BIM) systems. The work is aimed at studying the efficiency and accuracy of the design performed using CAD technologies and comparing it with the results obtained through the use of BIM modeling. Changes that occur to the building and are not foreseen in the original design can be incorporated into the model, which ensures that the information is upto-date and relevant throughout the entire life cycle of the building.

Digital design of open hollow obturator framework using existing dentures: A dental technique

Computer-aided design and computer-aided manufacturing technology has been applied to the fabrication of maxillary obturator frameworks, both directly and indirectly. However, with earlier techniques, it was not possible to accurately determine the position of the framework conforming to the palate, an issue that has been resolved in current fabrication methods. Using the patient’s existing denture, prosthodontists can determine where the framework should be positioned in the defect area. This allows the obturator bulb to be hollowed, thereby reducing weight and making adjustment easier. The most appropriate position for the finish line can be determined by accurately establishing the arrangement of the artificial teeth as well as the most appropriate polishing surface morphology. In maxillofacial prosthetics, restoring proper articulation and the swallowing function through rehabilitation is important, and determining the proper palatal morphology enables good tongue movement and facilitates the restoration of adequate function. The lighter weight contributes to protecting the remaining teeth and improves patient comfort.

Computer Aided Environment Design Technology Based on Simulation Data

Computer aided environment design technology, also known as Computer aided environment (CAE) technology, is a technology that utilizes computers for engineering design, analysis, and optimization. Simulation data refers to the data generated by simulating the real environment or system in a computer, with its core characteristics of simulation and predictability, used for performance evaluation. CAE technology simulates the state and behavior of buildings, facilities, or environments, evaluating the effectiveness of design solutions and predicting performance through simulation data. This article aims to conduct a technical analysis and practical case studies to evaluate the effectiveness, draw conclusions and suggestions from the technical analysis, in order to promote the development of computer-aided environmental design technology and improve the efficiency and quality of environmental design. Therefore, this article uses CAE technology to simulate the thermal performance, structural response, and fluid dynamics changes of buildings. This article simulates the temperature environment of rooms in buildings and the pedestrian density and traffic flow in traffic through experimental simulation and data comparison. It is found that the peak pedestrian density occurs at 16 and 17 minutes, and the lowest value is at 45 minutes. There is a certain similarity between the data results and the real data.

Application of Computer Aided Design Technology in Landscape Design

Application of Computer Aided Design Technology in Landscape Design

Optimization of Computer Aided Design Technology Based on Support Vector Machine in Landscape Art Design

Optimization of Computer Aided Design Technology Based on Support Vector Machine in Landscape Art Design

Comparative analysis of endocrown fracture resistance and marginal adaptation: CAD/CAM technology using lithium disilicate vs. zirconia-reinforced lithium silicate ceramics

AimsThe present study aimed to compare the fracture resistance and marginal adaptation of endocrowns fabricated using lithium disilicate (LDS) and zirconia-reinforced lithium silicate 9ZLS) ceramics by the computer-aided design and computer-aided manufacturing (CAD/CAM) technology. Materials and MethodsIn this in vitro experimental study, 24 extracted mandibular first molars received standard endocrown preparation and were randomly assigned to two groups (n = 12) for the fabrication of endocrowns with ZLS (Suprinity) and LDS (IPS e.max CAD) ceramics. After scanning the teeth with a CAD scanner, endocrowns were designed by inLab Software version 15 (inLab SW 15) and prepared by an imes-icore 350i milling machine. The vertical marginal gap of endocrowns was measured under a stereomicroscope at three steps before and after cementation and after thermomechanical cycles. The fracture resistance of specimens was then measured by load application at a 45° angle. Mode of failure was also determined as reparable or irreparable. Data were analyzed using Pearson’s correlation test and t-test. ResultsThe mean fracture resistance of ZLS endocrowns was significantly higher than that of LDS endocrowns (P = 0.000). The reparability of ZLS endocrowns was zero, while that of LDS endocrowns was 83.33 %. The vertical marginal gap was significantly smaller in ZLS than in LDS endocrowns at all three time points (P < 0.05). Also, the marginal gap increased by cementation and thermomechanical cycles in both groups. ConclusionZLS and LDS endocrowns both showed acceptable vertical marginal adaptation. ZLS had superior marginal adaptation and higher fracture resistance.

Application of a modified osteotomy and positioning integrative template system (MOPITS) based on a truncatable reconstruction model in the precise mandibular reconstruction with fibula free flap: a pilot clinical study

BackgroundMandibular defects can greatly affect patients' appearance and functionality. The preferred method to address this issue is reconstructive surgery using a fibular flap. The current personalized guide plate can improve the accuracy of osteotomy and reconstruction, but there are still some problems such as complex design process and time-consuming. Therefore, we modified the conventional template to serve the dual purpose of guiding the mandible and fibula osteotomy and facilitating the placement of the pre-bent titanium.MethodsThe surgery was simulated preoperatively using Computer-Aided Design (CAD) technology. The template and truncatable reconstruction model were produced in the laboratory using 3D printing. After pre-bending the titanium plate according to the contour, the reconstruction model was truncated and the screw trajectory was transferred to form a modified osteotomy and positioning integrative template system (MOPITS). Next, the patient underwent a composite template-guided vascularized fibula flap reconstruction of the mandible. All cases were reviewed for the total operative time and accuracy of surgery.ResultsThe procedures involved 2–4 fibular segments in 15 patients, averaging 3 fibular segments per procedure. The osteotomy error is 1.01 ± 1.02 mm, while the reconstruction angular error is 1.85 ± 1.69°. The preoperative and postoperative data were compared, and both p > 0.05. During the same operation, implant placement was performed on four patients, with an average operative time of 487.25 ± 60.84 min. The remaining malignant tumor patients had an average operative time of 397.18 ± 73.09 min. The average postoperative hospital stay was 12.95 ± 3.29 days.ConclusionsThis study demonstrates the effectiveness of MOPITS in facilitating precise preoperative planning and intraoperative execution of fibula flap reconstruction. MOPITS represents a promising and reliable tool for reconstructive surgery, particularly for inexperienced surgeons navigating the challenges of mandible defect reconstruction.