scholarly journals Application Effect of Computer-Aided Design Combined with Three-Dimensional Printing Technology in Autologous Tooth Transplantation：A Retrospective Cohort Study

2021 ◽  
Author(s):  
Shuang Han ◽  
Hui Wang ◽  
Jue Chen ◽  
Jihong Zhao ◽  
Haoyan Zhong
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Preparation Time ◽  
Shape Deviation ◽  
Printing Technology ◽  
Surgical Guides ◽  
Computer Aided ◽  
Aided Design

Abstract Background:To examine the effectiveness of computer-aided design combined with the 3D printing technology in autotransplantation of teeth by using retrospective analysis.Methods: We divided 41 tooth autotransplantation cases which assisted by 3D-printed donor models and surgical guides into two groups in accordance with whether the donor tooth could be placed successfully after the preparation of alveolar socket guided by the model tooth. Then, we compared and analyzed the preparation time of alveolar socket, extra-alveolar time, and number of positioning trials of the donor tooth between the two groups. We also included a comparison of the in vitro time of the donor tooth with that of 15 min. The incidence of complications was included in the prognostic evaluation.Results: The mean preparation time of the alveolar socket, mean extra-alveolar time of donor tooth, and mean number of positioning trials with donor tooth of 41 cases were 12.73 ± 6.18 min, 5.56 ± 3.11 min, and 2.61 ± 1.00, respectively. The group wherein the donor tooth cannot be placed successfully (15.57 ± 6.14 min, 7.29 ± 2.57 min) spent more preparation time of alveolar socket and extra-alveolar time than the group wherein the donor tooth can be placed successfully (9.75 ± 4.73 min, 3.75 ± 2.57 min). The number of positioning trials with the donor tooth of the group wherein the donor tooth cannot be placed successfully (3.19±0.75) was higher than that of the other group (2.00 ± 0.86). Conclusions: Compared with the traditional tooth autotransplantation, the introduction of computer-aided design combined with 3D printing of the model tooth and surgical guides evidently shortens the preparation time of the alveolar socket and the extra-alveolar time of the donor tooth and reduces the number of positioning trials with the donor tooth regardless of the shape deviation between the model and actual teeth.

scholarly journals Application effect of computer-aided design combined with three-dimensional printing technology in autologous tooth transplantation: a retrospective cohort study

2022 ◽  
Vol 22 (1) ◽  
Author(s):  
Shuang Han ◽  
Hui Wang ◽  
Jue Chen ◽  
Jihong Zhao ◽  
Haoyan Zhong
Keyword(s):  
3D Printing ◽  
Success Rate ◽  
Computer Aided Design ◽  
Preparation Time ◽  
Shape Deviation ◽  
Surgical Guides ◽  
Periodontal Membrane ◽  
Significant Difference ◽  
Computer Aided ◽  
Aided Design

Abstract Background The activity of donor periodontal membrane is the key factor of autologous tooth healing. The application of digital aided design, 3D printing model and guide plate in autotransplantation of tooth (ATT) is expected to reduce the damage of periodontal membrane and preserve the activity of periodontal membrane, so as to improve the success rate of ATT. This study tried to prove the role of digital technology in improving the success rate of ATT, although there are differences in model accuracy in practice. Methods We included 41 tooth autotransplantation cases which assisted by 3D-printed donor models and surgical guides and divided them into two groups in accordance with whether the donor tooth could be placed successfully after the preparation of alveolar socket guided by the model tooth. Then, we compared and analyzed the preparation time of alveolar socket, extra-alveolar time, and number of positioning trials of the donor tooth between the two groups. We also included a comparison of the in vitro time of the donor tooth with that of 15 min. The incidence of complications was included in the prognostic evaluation. Results The mean preparation time of the alveolar socket, mean extra-alveolar time of donor tooth, and mean number of positioning trials with donor tooth of 41 cases were 12.73 ± 6.18 min, 5.56 ± 3.11 min, and 2.61 ± 1.00, respectively. The group wherein the donor tooth cannot be placed successfully (15.57 ± 6.14 min, 7.29 ± 2.57 min) spent more preparation time of alveolar socket and extra-alveolar time than the group wherein the donor tooth can be placed successfully (9.75 ± 4.73 min, 3.75 ± 2.57 min). The number of positioning trials with the donor tooth of the group wherein the donor tooth cannot be placed successfully (3.19 ± 0.75) was higher than that of the other group (2.00 ± 0.86). There was no significant difference in survival rates between the two groups. Conclusions Compared with the traditional tooth autotransplantation, the introduction of computer-aided design combined with 3D printing of the model tooth and surgical guides evidently shortens the preparation time of the alveolar socket and the extra-alveolar time of the donor tooth and reduces the number of positioning trials with the donor tooth regardless of the shape deviation between the model and actual teeth.

scholarly journals Upgrade and Repair of the Instrumentation Equipment on the ISS RS Simulators Using FDM 3D Printing Technology.

2021 ◽  
pp. 97-110
Author(s):  
V.V. Batrakov ◽  
A.I. Krylov ◽  
V.N. Saev ◽  
B.N. Nefyodov ◽  
V.M. Novichkov ◽  
...  
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Cad Tools ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Computer Aided ◽  
Aided Design

The paper presents space simulators (SS), types of instrumentation equipment installed on the workplaces of the space simulators operators (SSOPW), multi-functional display panel (MFDP), computer-aided design (CAD) tools, 3D printing technologies.

scholarly journals Workflow of CAD / CAM Scoliosis Brace Adjustment in Preparation Using 3D Printing

2017 ◽  
Vol 11 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Hans-Rudolf Weiss ◽  
Nicos Tournavitis ◽  
Xiaofeng Nan ◽  
Maksym Borysov ◽  
Lothar Paul
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Short Communication ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Cam Software ◽  
Made In

Background: High correction bracing is the most effective conservative treatment for patients with scoliosis during growth. Still today braces for the treatment of scoliosis are made by casting patients while computer aided design (CAD) and computer aided manufacturing (CAM) is available with all possibilities to standardize pattern specific brace treatment and improve wearing comfort. Objective: CAD / CAM brace production mainly relies on carving a polyurethane foam model which is the basis for vacuuming a polyethylene (PE) or polypropylene (PP) brace. Purpose of this short communication is to describe the workflow currently used and to outline future requirements with respect to 3D printing technology. Method: Description of the steps of virtual brace adjustment as available today are content of this paper as well as an outline of the great potential there is for the future 3D printing technology. Results: For 3D printing of scoliosis braces it is necessary to establish easy to use software plug-ins in order to allow adding 3D printing technology to the current workflow of virtual CAD / CAM brace adjustment. Textures and structures can be added to the brace models at certain well defined locations offering the potential of more wearing comfort without losing in-brace correction. Conclusions: Advances have to be made in the field of CAD / CAM software tools with respect to design and generation of individually structured brace models based on currently well established and standardized scoliosis brace libraries.

scholarly journals The accuracy of computer-aided design and manufacturing surgical-guide for infrazygomatic crest miniscrew placement

2021 ◽  
Vol 11 ◽  
pp. 48-55
Author(s):  
Prajak Jariyapongpaiboon ◽  
Jirawan Chartpitak ◽  
Jaturong Jitsaard
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Surgical Guide ◽  
Surgical Guides ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
The Right ◽  
Aided Design ◽  
3D Software

Objectives: Infrazygomatic crest (IZC) surgical guides have been employed to prevent any avoidable complications during miniscrew insertion. The purpose of this study was to evaluate the accuracy of IZC miniscrew placement when using a surgical-guide developed by computer-aided design and manufacturing (CAD/CAM) techniques. Materials and Methods: Ten patients were scanned with cone-beam computed tomography for three-dimensional (3D) planning of IZC miniscrew placements. The upper arches were scanned separately, and virtual miniscrews were placed in the position planned by 3D software. The CAD/CAM surgical guides were designed and fabricated individually to enable accurate miniscrew placement. Subsequently, 20 self-drilling miniscrews were inserted at the right and left IZC areas using 5 CAD/CAM surgical guides (CS group, n = 10) and direct insertion (DI group, n = 10), respectively. Pre- and post-operative digital model images were compared, actual and planned miniscrew positions were superimposed and measured for 3D angular and distance deviations in the two groups. Comparisons between groups were made using the Kruskal–Wallis test. Results: In the CS group, the median coronal and sagittal angular deviations were 2.95 degrees (range 0.34–5.26 degrees) and 2.05 degrees (range 0.38–4.08 degrees), respectively, while the median coronal and apical deviations were 0.39 mm (range 0.24–0.51 mm) and 0.50 mm (range 0.16–0.66 mm). These deviations differed significantly from those of the DI group. Conclusion: The IZC CAD/CAM surgical guide has made it possible to control miniscrew placement with high precision.

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