Three-dimensional Digital Technology Research Articles

Current trends in orthognathic surgery.

Orthognathic surgery has steadily evolved, gradually expanding its scope of application beyond its original purpose of simply correcting malocclusion and the facial profile. For instance, it is now used to treat obstructive sleep apnea and to achieve purely cosmetic outcomes. Recent developments in three-dimensional digital technology are being utilized throughout the entire process of orthognathic surgery, from establishing a surgical plan to printing the surgical splint. These processes have made it possible to perform more sophisticated surgery. The goal of this review article is to introduce current trends in the field of orthognathic surgery and controversies that are under active discussion. The role of a plastic surgeon is not limited to performing orthognathic surgery itself, but also encompasses deep involvement throughout the entire process, including the set-up of surgical occlusion and overall surgical planning. The authors summarize various aspects in the field of orthognathic surgery with the hope of providing helpful information both for plastic surgeons and orthodontists who are interested in orthognathic surgery.

Full Digital Surgery-First, Skeletal Anchorage and Aligners Approach to Correct a Gummy Smile and Class II Malocclusion with Mandibular Retrusion and Deviation

Background: The demand for interdisciplinary orthodontic treatment has increased significantly in the past few years, especially in adult patients. This kind of treatment requires careful clinical management, as consequence of the possible complications and limits related to adult age. However, the use of skeletal anchorage and three-dimensional (3D) digital technology has deeply revolutionised diagnostic planning and treatment strategies. Methods: A fully digital approach to the treatment of a Class II patient with a gummy smile and mandibular deficiency and deviation, consisting of initial surgery followed by the use of aligners and skeletal anchorage, is described. Results: The 3D, fully digital pre-evaluation enabled clinicians to accurately and reliably plan the surgical procedure and subsequent orthodontics, including the individualised positioning of stabilisation plates and a splint for maxillary and chin surgical movements. This allowed for the improvement of the patient’s facial aesthetics and dental occlusion without the use of visible orthodontic appliances or the occurrence of pre-surgical aesthetic worsening. Conclusions: This approach could be very effective for adult patients seeking aesthetic treatment options for facial and dental aesthetic improvement.

Development of fashion design applying to costume and Huangping batik of the Chinese minority Miao

The purpose of this study is twofold: First, to develop new sustainable design methods (aligned with ethnic elements and traditional culture) combined with three-dimensional digital clothing technology throughout the design process, which can be presented as guideline materials for various fashion designs to be developed in contemporary sensibilities. Second, it is the intention to produce creative fashion designs by incorporating the characteristics and methods of Miao’s Huangping batik dyeing technique and to present various possibilities in the fashion design field. The overall design characteristics sought by Miao minority are in line with the complex terrain and the ecological and climatic conditions. Miaoist batik dyeing (registered as part of Chinese national intangible cultural heritage) features unique production methods and patterns. The study results are as follows. First, this attempt has enabled understanding of the national costume culture as Chinese Miao’s traditional cultural heritage to be promoted, while the direction of contemporary design development using traditional elements has been presented. Second, the study demonstrated new and innovative expressions and styles relying on three-dimensional digital contouring technology and identified the possibility of developing various designs. Third, it was confirmed that the dyed batik pattern design created by the three-dimensional digital contouring technology could be recombined or expanded as digital printing to express the traditional ethnic designs in a practical manner utilizing digital printing techniques based on traditional characteristics.

Development of virtual upcycling fashion design based on 3-dimensional digital clothing technology

The purpose of this study is to develop up-cycling fashion design methods centered on discarded denim material for the study of original up-cycling design methods. Up-cycling fashion design work was developed using digital clothing technology. This is a recent hot topic among sustainable fashion design methods. Up-cycling fashion design expression methods (categorized as dismantlement, collages, depaysement, grafting, weaving, and tearing) were centered on design methods. These methods create various three-dimensional modeling effects in planar forms, whereby five pieces can be applied to the fabric and digitally produced. The results are as follows: First, the use of discarded denim fabric for the development of up-cycling fashion design pieces enabled the recycling of existing resources, provided solutions to environmental pollution problems, and provided expansion opportunities for design processes for sustainable fashion products that expand the design value of denim products and their utility. Second, new eco-friendly fashion designs that attempt to achieve diversity in modern fashion trends could be presented through formative contemporary fashion produced by up-cycling work products. Third, up-cycling fashion design work is expected to provide opportunities for eco-friendly fashion design methods. This will expand the value of sustainable fashion design by recycling simple waste materials through the use of three-dimensional digital clothing technology and further through the presentation of expanded life cycles that extend product planning, production, and life cycles.

Integration of Laser Scanner and Photogrammetry for Heritage BIM Enhancement

Digital 3D capture and reliable reproduction of architectural features is the first and most difficult step towards defining a heritage BIM. Three-dimensional digital survey technologies, such as TLS and photogrammetry, enable experts to scan buildings with a new level of detail. Challenges in the tracing of parametric objects in a TLS point cloud include the reconstruction of occluded parts, measurement of uncertainties relevant to surface reflectivity, and edge detection and location. In addition to image-based techniques being considered cost effective, highly flexible, and efficient in producing a high-quality 3D textured model, they also provide a better interpretation of surface linear characteristics. This article addresses an architecture survey workflow using photogrammetry and TLS to optimize a point cloud that is sufficient for a reliable HBIM. Fusion-based workflows were proposed during the recording of two heritage sites—the Matbouli House Museum in Historic Jeddah, a UNESCO World Heritage Site; and Asfan Castle. In the Matbouli House Museum building, which is rich with complex architectural features, multi-sensor recording was implemented at different resolutions and levels of detail. The TLS data were used to reconstruct the basic shape of the main structural elements, while the imagery’s superior radiometric data and accessibility were effectively used to enhance the TLS point clouds for improving the geometry, data interpretation, and parametric tracing of irregular objects in the facade. Furthermore, in the workflow that is considered to be the ragged terrain of the Castle of Asfan, here, the TLS point cloud was supplemented with UAV data in the upper building zones where the shadow data originated. Both datasets were registered using an ICP algorithm to scale the photogrammetric data and define their actual position in the construction system. The hybrid scans were imported and processed in the BIM environment. The building components were segmented and classified into regular and irregular surfaces, in order to perform detailed building information modeling of the architectural elements. The proposed workflows demonstrated an appropriate performance in terms of reliable and complete BIM mapping in the complex structures.

Digital Documentation and a 3-D Model of Beaufort Castle via RTK GNSS, Terrestrial Laser Scanner and UAS-based Photogrammetry

Three-dimensional digital technology is important in the maintenance and monitoring of archeological sites. This paper focuses on using a combination of terrestrial laser scanning and unmanned aerial vehicle (Phantom 4 pro) photogrammetry to establish a three-dimensional model and associated digital documentation of Beaufort castle (Arnoun, South Lebanon). The overall discrepancy between the two technologies was sufficient for the generation of convergent data. Thus, the terrestrial laser scanning and phantom 4 photogrammetry data were aligned and merged post-conversion into compatible extensions. A three-D dimensional (3D) model, with planar and perpendicular geometries, based on the hybrid datapoint cloud was developed. This study demonstrates the potential of using the integration of terrestrial laser scanning and photogrammetry in 3D digital documentation and spatial analysis of the Lebanese archeological sites.

A New Type of Three-Dimensional Customized Composite Implant in Reconstruction of Large Skull Defects.

Large skull defects can result in chronic injury to intracranial tissues as well as psychological trauma for patients, and their repair presents a challenge to surgeons. Hydroxyapatite has been used in reconstructing skull defects for many years, but it is difficult to adjust the shape and size of the material intraoperatively, especially for large defects. With three-dimensional digital technology, a new type of customized composite implant made of epoxide acrylate maleic and hydroxyapatite has been applied in clinical practice. In this retrospective review, 15 patients with large skull defects (4 female and 11 male, at a mean age of 36.4 years, range from 24-65 years) were treated with the novel customized composite implant, reconstructing the large skull defects successfully. During the average 2.2 years follow-up period (range 0.5-4 years), complications including infection, cerebrospinal fluid leakage, intracranial hemorrhage, or implant exposurea were not occured, only 1 patient (6.7%) with a seroma managed non-operatively. The customized implants, which required no intraoperative adjustments and are about a third of the cost of titanium implants, are an excellent alternative for large skull defect repair.

Orbital Hypertelorism Correction With Inverted-U Osteotomy: Indications and Advantages.

This study aimed to explore the clinical effects of inverted-U osteotomy in correcting orbital hypertelorism and to further explore its indications and advantages; 4 patients with orbital hypertelorism and premature closure of unilateral coronal suture underwent inverted-U osteotomy. The interorbital distance was measured using three-dimensional digital technology pre- and postoperatively. Virtual preoperative planning and three-dimensional cutting guide were used to minimize surgical risk and increase the precision of periorbital osteotomy. The procedure was successfully performed on 4 patients; the average orbital medial wall distance was reduced from 34.9 mm to 23.1 mm. Inverted-U osteotomy is a modified surgical method especially applicable to orbital hypertelorism with premature closure of unilateral coronal suture. Advantages include less surgical trauma, a shorter operative time, and better correction results.

Noncontact restoration of missing parts of stone Buddha statue based on three-dimensional virtual modeling and assembly simulation

Three-dimensional (3D) digital technology is an essential conservation method that complements the traditional restoration technique of cultural artifacts. In this study, 3D scanning, virtual restoration modeling, and 3D printing were used as a noncontact approach for restoring a damaged stone-seated Bodhisattva (stone Buddha statue). First, a 3D model with an average point density of 0.2 mm was created by integrating the fixed high-precision scanning of the exterior and the handheld mid-precision scanning of the interior excavated hole. Using a 3D deterioration map of the stone Buddha statue, the area of the missing parts was measured to be 400.1 cm2 (5.5% of the total area). Moreover, 257.1 cm2 (64.2% of the missing part area) of four parts, including the head, surrounding area of the Baekho, right ear, and right eye, for which symmetry was applicable for modeling or there could be ascertainable historical evidence for the total missing parts, was selected for restoration. The virtual restoration of the missing parts of the stone Buddha statue was performed using a haptic modeling system in the following order. First, the location of the three fragments detached from the head was determined. Next, a reference model was selected, and its symmetrization and modification with respect to the original model were conducted. Further, estimation modeling and outer shape description were achieved through historical research and consultation with experts. The heuristic-based assembly suitability of the created virtual restoration model (461 cm3) was verified by design mockup printing and digital–analog simulation. In particular, to address assembly interference, the interface surface was modified and reprocessed several times. Accordingly, the volume of the final design mockup decreased by 5.2% (437 cm3). Photopolymerization 3D printing technology was used for the actual restoration of the stone Buddha statue, and considering the surface roughness, the layer thickness of the material used for restoration was set at 0.10 mm. Finally, the surface of the printed output was colored to prevent yellowing and joined to the missing parts of the stone Buddha statue. This study presents a remarkable case of shifting from the traditional manual-contact method to the contactless digital method for restoring artifacts and is expected to largely contribute to increasing the usability of digital technologies in the restoration of cultural artifacts.

Research on General Model System for Three-Dimensional Design of Transmission and Transformation Project Under Smart Grid Modeling Standards

The traditional design method of power transmission and transformation project based on knowledge model has the problems of rough construction quality and low economic benefit of power transmission and transformation project. Therefore, the design method of power transmission and transformation engineering based on three-dimensional digital intelligent technology is proposed, and the working mode of intelligent power transmission and transformation engineering is designed. Based on this working mode, a three-dimensional collaborative design process for power transmission and transformation engineering is obtained. The design platform is built to shorten the design cycle of power transmission and transformation projects, so that the efficiency of power transmission and transformation engineering design is greatly improved. Through the digital handover of the three-dimensional collaborative database, the transmission and transformation engineering information is sorted and sorted, so that multiple people can view and modify the information at the same time, and the three-dimensional verification process of the transmission and transformation project is designed to achieve a safe distance and collision to the transmission and transformation project. Testing to improve the accuracy of engineering design. Experimental results show that the proposed method can improve the design efficiency and quality of power transmission and transformation projects, and has a higher social and economic evaluation effect.

Customized Fabrication Approach for Hypertrophic Scar Treatment: 3D Printed Fabric Silicone Composite

Hypertrophic scars (HS) are considered to be the greatest unmet challenge in wound and burn rehabilitation. The most common treatment for HS is pressure therapy, but pressure garments may not be able to exert adequate pressure onto HS due to the complexity of the human body. However, the development of three-dimensional (3D) scanning and direct digital manufacturing technologies has facilitated the customized placement of additively manufactured silicone gel onto fabric as a component of the pressure therapy garment. This study provides an introduction on a novel and customized fabrication approach to treat HS and discusses the mechanical properties of 3D printed fabric reinforced with a silicone composite. For further demonstration of the suggested HS therapy with customized silicone insert, silicone inserts for the finger webs and HS were additively manufactured onto the fabric. Through the pressure evaluation by Pliance X system, it proved that silicone insert increases the pressure exerted to the HS. Moreover, the mechanical properties of the additively manufactured fabric silicone composites were characterized. The findings suggest that as compared with single viscosity print materials, the adhesive force of the additively manufactured silicone and fabric showed a remarkable improvement of 600% when print materials with different viscosities were applied onto elevated fabric.

Customized Fabrication Approach for Hypertrophic Scar Treatment: 3D Printed Fabric Silicone Composite

Hypertrophic scars (HS) are considered to be the greatest unmet challenge in wound and burn rehabilitation. The most common treatment for HS is pressure therapy, but pressure garments may not be able to exert adequate pressure onto HS due to the complexity of the human body. However, the development of three-dimensional (3D) scanning and direct digital manufacturing technologies has facilitated the customized placement of additively manufactured silicone gel onto fabric as a component of the pressure therapy garment. This study provides an introduction on a novel and customized fabrication approach to treat HS and discusses the mechanical properties of 3D printed fabric reinforced with a silicone composite. For further demonstration of the suggested HS therapy with customized silicone insert, silicone inserts for the finger webs and HS were additively manufactured onto the fabric. Through the pressure evaluation by Pliance X system, it proved that silicone insert increases the pressure exerted to the HS. Moreover, the mechanical properties of the additively manufactured fabric silicone composites were characterized. The findings suggest that as compared with single viscosity print materials, the adhesive force of the additively manufactured silicone and fabric showed a remarkable improvement of 600% when print materials with different viscosities were applied onto elevated fabric.

Application of 3D Digital Technology in the substation design

During the operation of a substation, the requirements for the engineering design are very strict, requiring the cooperation of multiple professions, and the demand for engineering digitalization is also increasing. The three-dimensional digital technology is to effectively solve the problems encountered in the substation operation in the form of data representation and data storage, and provides reliable technical support and efficient concepts of technology for substation operation. This time, the main analysis of the specific application of 3D digital technology in the substation design, and combined with the actual situation of China’s current substation, the development prospects of 3D digital design are analyzed and prospected.

Detailed characterization of micronano pore structure of tight sandstone reservoir space in three dimensional space: a case study of the Gao 3 and Gao 4 members of Gaotaizi reservoir in the Qijia area of the Songliao basin

Tight sandstone samples from the Gao 3 and Gao 4 members of Gaotaizi reservoir in Qijia area of the northern Songliao Basin were targeted as the main research objects in this paper. Through micro/nano CT technology and auto skeleton module and connectivity module in avizo software, three-dimensional models for the micro pore structure of Gaotaizi tight sandstone in the research area were constructed. The experimental results demonstrate that types of reservoir space include intergranular dissolution pores, intragranular dissolution pores, and micro-fractures, indicating remarkable microscopic heterogeneity with characteristics of a continuous distribution in a micronano scale. Under the micro scale, different physical property and sedimentary microfacies of tight reservoir show various pore structure characteristics in three-dimensional space, with the primary front of pore throats mainly distributed in 0.6~1.5 μm. Under the nanoscale, micro heterogeneity is remarkable, with the primary front of pore throats distributed in 40~100 nm. In addition, the nanopore distribution pattern in three-dimensional space mainly includes the nanopores in the granules and the nanofractures, of which the latter type plays a crucial role in connecting nanopores and migration of nano oil and gas migration; at the same time, this paper verify the digital core experimental results by using MICP technology. With the further development of big data technology and deep learning technology, three-dimensional digital core technology based on micro/nano CT technology will become an important technology applied in the exploration and development of unconventional oil and gas.

A Research on key Vision Technologies of Red Revolution site in Gannan Soviet area based on UE4 Virtual engine platform

The Red Revolution site in Gannan Soviet area is an important cultural heritage of China, which is represented by Yeping and Shazhouba in Ruijin City, and has important spiritual and cultural value. The red revolution site in Gannan Soviet area is taken as the object of study from the point of view of protection and inheritance. And the visualization technology is studied under the platform of UE4 virtual engine combined with three-dimensional digital technology. In addition, the core technologies such as the model making of 3D Max software, the material construction of UE4 virtual platform and the interface interaction realization of UE4 virtual platform in the visualization technology of red revolution site in Gannan Soviet area are studied. They are all studied by means of field investigation, data measurement and quantitative experiments. At the same time, this paper points out the ways, methods and strategies of realization from the level of visualization technology, and its object characteristic is to combine the revolutionary site with the paper. This also provides a technical guarantee for the development of Red Revolution sites and other similar visualization projects in Gannan Soviet area.

Man-Machine-Environment Virtual Design and JACK Simulation of Rosa Roxburghii Picking Machine

In order to improve the coordination between human and agricultural machinery, taking Rosa roxburghii picking machine as an example, a virtual design method based on human-machine-environment system, combined with three-dimensional digital simulation technology and human skeleton biology and other disciplines is proposed. Three-dimensional parametric modeling of Rosa roxburghii picking machine is carried out by using three-dimensional engineering software. In JACK simulation software, a digital human body model is created to analyse the comfort, accessibility and visibility of the operator. The coordination degree of agricultural machinery design in the human-machine-environment system can be judged in advance, and targeted optimization design can be carried out to achieve the purpose of improving the coordination between human and machinery in the human-machine-environment system and reduce the accident rate. This method shortens the research and development cycle of agricultural machinery and provides a reference for humanized design of agricultural machinery design.

Painterly focused Chinese ink animation: Seeing through the cultural lens of the Xiang system

Chinese ink animation has won worldwide respect for its ethereal and refined approach to ink painting. From the 1950s to 1980s, the Shanghai Animation Film Studio produced a number of award-winning ink animations. These animations share a unique traditional Chinese aesthetic based on Chinese literature and philosophy. However, the complex and long hand-made production process is one of the factors that caused the decline of Chinese ink animation following the 1980s. Since the millennium, three-dimensional ink modelling and digital painting technology have contributed to the revival of Chinese ink animation. This article summarizes the development of the production process of Chinese ink animation, together with its artistic features in both the analogue and digital age. Theoretically, this article focuses on a Chinese poetic framework, ‘the Xiang system’, as both a creative strategy for producing Chinese ink animation and an analytical lens to critique it.

Dielectric behaviors of marine sediments for reliable estimation of gas hydrate saturation based on numerical simulation

The accurate evaluation of hydrate saturation, in marine sediments, not only can provide references for hydrate resources assessment but also help to monitor hydrate decomposition that might cause disasters. The dielectric properties can be employed to efficiently estimate hydrate saturation. However, the correlations between dielectric properties and hydrate saturation are still poorly understood. To obtain such a reliable relationship, we first adopt a numerical simulation method based on the three-dimensional finite difference model and digital core technology to calculate the dielectric properties of hydrate-bearing marine sediments. After testing and validating the numerical method by comparing the simulation results with published experimental data, we further apply the simulation technique to calculating the dielectric properties of hydrate-bearing sediments with varying porosities, hydrate saturations and micro-distributions in a broaden frequency. It is found that the dependence of dielectric behaviors on hydrate saturation is significantly affected by hydrate micro-distributions, especially in lower frequency range. We also find that relative permittivity at the frequency of 1 GHz decreases exponentially with increasing hydrate saturation, and the two coefficients that determine the exponential correlation are both dependent on the porosity of the sediments. Using the established relationships, the hydrate saturation in the Mount Elbert Well is successfully estimated from the measured dielectric data. The study provides a reliable tool for the accurate estimation of hydrate saturation in marine sediments.

Research on Auxiliary Construction System of Transmission Engineering Based on 3D Digital Achievements

In order to take full advantage of the three-dimensional digital design data and solve the traditional construction schemes’ problems better, characteristics of three-dimensional digital data and the shortcomings of traditional construction management methods in the paper are analyzed. The organization management mode of 3D digital results is studied to construct a full information 3D model library by combing the relationship between models, attributes, documents, drawings, etc. On the basis of this, combined with the construction process of transmission engineering, a three-dimensional auxiliary construction application platform for transmission engineering based on three-dimensional digital design results is established. Through the software platform to manage, process, analyze and mine massive data, on the one hand, the integration, interaction and sharing of multi-source heterogeneous data are realized; on the other hand, the three-dimensional digital technology is applied to the construction process to realize the three-dimensional visualization of the construction process of the transmission engineering, thus providing a new solution for solving the construction problem.

Morphometric measurement and applicable feature analysis of sacral alar-iliac screw fixation using forward engineering.

To evaluate S1AI-S4AI screw channels with three-dimensional digital technology simulation analysis and to study the feasibility and applicable features of sacral alar-iliac screw fixation in adults. Forty (20 men and 20 women) normal adult's pelvic CT scan data sets were selected to reconstruct the three-dimensional pelvic model. The ideal S1AI-S4AI screw channels were simulated, followed by precise measurement of their parameters. The results showed that there were no significant differences in the transverse angles, sagittal angles, radiuses of the maximal inscribed circles, or lengths of the screw channels in S1AI-S2AI screws between genders (P > 0.05). In contrast, the radiuses of the maximal inscribed circles on the left and right, respectively, were 5.93 ± 1.02mm and 5.92 ± 1.04mm in males and 4.64 ± 0.98mm and 4.59 ± 0.95mm in females, and there was a significant difference in S3AI screws between genders (P < 0.05). With a radius of 2.50mm considered to be standard, there were 25 cases (62.5%) with an S4AI screw channel radius ≤ 2.50mm in 40 adults, and 15 cases (37.5%; 9 males and 6 females) with a radius > 2.50mm. Furthermore, the transverse angles, the sagittal angles, the lengths of the screw channels, and the radiuses of the maximal inscribed circles were significantly different between genders in 15 cases (P < 0.05). Only one maximum ideal screw can be placed on one side at a time. With a radius of 2.50mm considered to be standard, it is feasible to place S1AI-S3AI screws with a radius > 2.50mm in the entire adult population and S4AI screws with a radius > 2.50mm in some of the adult population. Furthermore, preoperative three-dimensional reconstruction and three-matic research software can effectively simulate the sacral alar-iliac screw channels, and they can provide accurate data for clinical applications.