A computer-aided visualization system for orthodontic treatment

2014 ◽  
Author(s):  
Ziwei Li ◽  
Yangzhou Gan ◽  
Jiali Tan ◽  
Qunfei Zhao ◽  
Zeyang Xia
Keyword(s):  
Orthodontic Treatment ◽  
Visualization System ◽  
Computer Aided

scholarly journals A Method for Tooth Model Reconstruction Based on Integration of Multimodal Images

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Xinwen Zhou ◽  
Yangzhou Gan ◽  
Jing Xiong ◽  
Dongxia Zhang ◽  
Qunfei Zhao ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Orthodontic Treatment ◽  
Ct Images ◽  
Ct Scans ◽  
Reconstruction Method ◽  
Model Reconstruction ◽  
Crown Area ◽  
Computer Aided ◽  
Multimodal Images ◽  
Reconstructed Model

A complete digital tooth model is needed for computer-aided orthodontic treatment. However, current methods mainly use computed tomography (CT) images to reconstruct the tooth model which may require multiple CT scans during orthodontic progress, and the reconstructed model is also inaccurate in crown area. This study developed a tooth model reconstruction method based on integration of CT images and laser scan images to overcome these disadvantages. In the method, crown models and complete tooth models are first reconstructed, respectively, from laser scan images and CT images. Then, crown models from laser scan images and tooth models from CT images are registered. Finally, the crown from laser scan images and root from CT images were fused to obtain a new tooth model. Experimental results verified that the developed method is effective to generate the complete tooth model by integrating CT images and laser scan images. Using the proposed method, the reconstructed models provide more accurate crown than CT images, and it is feasible to obtain complete tooth models at any stage of orthodontic treatment by using one CT scan at the pretreatment stage and one laser scan at that stage to avoid multiple CT scans.

Computer Aided Systems Human Engineering: Performance Visualization System (CASHE: PVS) — An Interactive, Hypermedia Design Tool

1994 ◽  
Vol 38 (15) ◽  
pp. 948-948
Author(s):  
Donald L. Monk
Keyword(s):  
Design Tool ◽  
Human Engineering ◽  
Visualization System ◽  
Cd Rom ◽  
Engineering Data ◽  
Hypermedia Design ◽  
Performance Visualization ◽  
Computer Aided ◽  
Interactive Hypermedia ◽  
Visualization Tools

The Performance Visualization Subsystem (PVS) of the Computer Aided Systems Human Engineering (CASHE) system is an interactive, hypermedia, ergonomics database developed for use by human-system designers, educators and researchers. CASHE: PVS version 1.0 allows users to access ergonomics data and models, stored on CD-ROM, as text, graphics, animations, and audio. The PVS hyper-linked data bases contain the complete implementations of the Boff & Lincoln (1988) Engineering Data Compendium and MIL-STD-1472D. Two specialized visualization tools, DataDigitizer and Perception & Performance Prototyper (P3), assist the user in understanding and applying this ergonomics data.

scholarly journals Disentangling the effects of CAD/CAM customized appliances and piezocision in orthodontic treatment: New evidence

2021 ◽  
Author(s):  
Carole Charavet ◽  
Dorien Van Hede ◽  
Nathalie Maes ◽  
Adelin Albert ◽  
France Lambert
Keyword(s):  
Computer Aided Design ◽  
Orthodontic Treatment ◽  
Treatment Time ◽  
Fine Tuning ◽  
Overall Treatment Time ◽  
End Of Treatment ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
New Evidence

ABSTRACT Objectives To discern the effects of computer-aided design (CAD)/computer-aided manufactured (CAM) customized appliances and piezocision on orthodontic treatment (OT). Materials and Methods The study combined findings from two previously published randomized controlled trials: (1) standard OT vs piezocision-assisted standard OT, and (2) CAD/CAM OT vs piezocision-assisted CAD/CAM OT. Piezocision is a minimally invasive corticotomy surgical procedure used to accelerate orthodontic treatment and CAD/CAM refers to CAD/CAM customized brackets and archwires. The outcomes were the overall treatment time, and the durations of the alignment phase and fine-tuning phase. Clinical and radiological features also were evaluated. Results The combined study included 48 patients with similar baseline characteristics. Compared to the standard treatment, CAD/CAM technology alone significantly decreased the overall median OT time from 543 to 394 days (P < .001) and from 543 to 254 days (P < .0001) when combined with piezocision. Although piezocision significantly reduced the duration of the alignment phase in the mandible and maxilla, CAD/CAM technology considerably shortened the fine-tuning phase. All periodontal and radiographic parameters remained stable from the start to the end of treatment in all groups. Conclusions CAD/CAM technology combined with piezocision accelerates the entire OT process, during the alignment phase for piezocision and during the fine-tuning phase for CAD/CAM, with a global reduction of the overall treatment time of more than 50%.

scholarly journals Surgical treatment of a skeletal Class III patient using customized brackets based on the CAD/CAM virtual orthodontic system

2021 ◽  
Author(s):  
Eun-Hack Andrew Choi ◽  
Jin-Ho Park ◽  
Tselmuun Erdenebat ◽  
Chung-Ju Hwang ◽  
Jung-Yul Cha
Keyword(s):  
Computer Aided Design ◽  
Orthognathic Surgery ◽  
Orthodontic Treatment ◽  
Treatment Time ◽  
Three Dimensional ◽  
Class Iii ◽  
Efficient Treatment ◽  
Skeletal Class ◽  
Computer Aided ◽  
Cad Cam

ABSTRACT The computer-aided design/computer-aided manufacturing (CAD/CAM) virtual orthodontic system produces customized brackets, indirect bonding jigs, and archwires based on a three-dimensional virtual setup. In surgical cases, this system helps to visualize the final occlusion during diagnosis and to efficiently plan individualized presurgical orthodontic treatments. A 20-year-old female patient with a skeletal Class III malocclusion, maxillary protrusion, and lip protrusion was successfully treated with orthognathic surgery and orthodontic treatment with maxillary first premolar extractions. The CAD/CAM system was applied for efficient treatment, with a total active treatment time of 16 months. In this case report, the applicability of the CAD/CAM virtual orthodontic system for orthognathic surgery cases is demonstrated. Suggestions are also made to overcome the limitations and to maximize the advantages of this system during orthodontic treatment of patients undergoing orthognathic surgery.

scholarly journals Methodology for Stress Measurement by Transparent Dental Aligners using Strain Gauge

2018 ◽  
Vol 9 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Mamta Juneja ◽  
Prashant Jindal ◽  
Divya Bajaj ◽  
Ishan Madhav ◽  
Rakesh Tuli
Keyword(s):  
Data Acquisition ◽  
Strain Gauge ◽  
Computer Aided Design ◽  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Stress Measurement ◽  
Gauge Factor ◽  
Fused Deposition ◽  
Computer Aided ◽  
Applied Forces

ABSTRACT Aim Orthodontic tooth movement is a pressing issue nowadays. An increased esthetic demand during orthodontic treatment has resulted in several alternative treatments. However, the need to avoid conventional fixed orthodontic prosthesis has led to the usage of computer-aided scanning, imaging, and printing technology along with the emergence of transparent dental aligners. The motive of this study is to present methodology of measurement of the stress applied by transparent dental aligners on human teeth using a strain gauge-based measurement device. Materials and methods Three dimensional (3D) scanner, 3D printer, thermoforming machine, strain gauge, data acquisition device, 3Shape Ortho Analyzer software were used. Results For a full-bridge Wheatstone bridge data acquisition system (DAQ), a standard aligner can strain a constantan-based strain gauge by nearly 2.5 × 10—4. This is based on the strain gauge factor of 2, input voltage 5 V for which a change in voltage of 2.5 mV was detected. Young's modulus for constantan strain gauge is given as 17.5 MPa; hence, this produced a stress of nearly 4.38 × 10—3 MPa. Conclusion This article describes an effective and convenient methodology for orthodontic treatment design for patients with crowding problem using computer-aided design (CAD) and computer-aided manufacturing (CAM) software and, thereafter, printing different stages of maxilla and mandible using fused deposition modeling (FDM) rapid prototyping technique. A transparent aligner is fabricated using thermoforming process, and the applied stresses on manipulated teeth by aligner can be evaluated using a strain gauge-based DAQ. Clinical significance This approach is expected to understand the efficacy of the thermoformed aligners for teeth movements by calculating applied forces and stresses. How to cite this article Bajaj D, Madhav I, Juneja M, Tuli R, Jindal P. Methodology for Stress Measurement by Transparent Dental Aligners using Strain Gauge. World J Dent 2018;9(1):13-18.

scholarly journals Camouflage treatment for skeletal Class III patient with facial asymmetry using customized bracket based on CAD/CAM virtual orthodontic system:

2019 ◽  
Vol 90 (4) ◽  
pp. 607-618
Author(s):  
Ha Na Sha ◽  
Sun Young Lim ◽  
Sun Mi Kwon ◽  
Jung-Yul Cha
Keyword(s):  
Computer Aided Design ◽  
Orthodontic Treatment ◽  
Facial Asymmetry ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Mandibular Asymmetry ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

ABSTRACT When considering camouflage orthodontic treatment for Class III malocclusion with skeletal facial asymmetry, it is crucial to preserve the favorable compensated posterior occlusion. Once the inclination of the compensated occlusion is changed during orthodontic treatment, unstable occlusion, such as crossbite or scissor bite may occur. A 23-year-old female patient had anterior spacing with Class III malocclusion and a mandibular asymmetry. A nonsurgical approach was adopted. The treatment objectives were to establish a Class I molar relationship with compensated inclination of the posterior dentition and to correct the midline deviation. To achieve these goals, the computer-aided design/computer-aided manufacturing (CAD/CAM) orthodontic system plus customized brackets was applied, and miniscrews were used to distalize the left mandibular dentition for midline correction. The results suggested that the CAD/CAM-based customized brackets can be efficiently used in camouflage treatment to achieve a correct final occlusion.

Accuracy of computer-aided prediction in soft tissue changes after orthodontic treatment

2019 ◽  
Vol 156 (6) ◽  
pp. 823-831
Author(s):  
Xu Zhang ◽  
Li Mei ◽  
Xinyu Yan ◽  
Jieya Wei ◽  
Yanxi Li ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Orthodontic Treatment ◽  
Computer Aided ◽  
Tissue Changes ◽  
Soft Tissue Changes

Computer-aided methods for 3-D visualization of serial sections and thick biological specimens

1992 ◽  
Vol 50 (2) ◽  
pp. 1060-1061
Author(s):  
Mark Ellisman ◽  
Maryann Martone ◽  
Gabriel Soto ◽  
Eleizer Masliah ◽  
David Hessler ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Three Dimensional ◽  
Neuritic Plaque ◽  
Dimensional Structure ◽  
Data Sets ◽  
Molecular Physiology ◽  
Research Activities ◽  
Computer Aided ◽  
Dimensional Reconstruction

Structurally-oriented biologists examine cells, tissues, organelles and macromolecules in order to gain insight into cellular and molecular physiology by relating structure to function. The understanding of these structures can be greatly enhanced by the use of techniques for the visualization and quantitative analysis of three-dimensional structure. Three projects from current research activities will be presented in order to illustrate both the present capabilities of computer aided techniques as well as their limitations and future possibilities.The first project concerns the three-dimensional reconstruction of the neuritic plaques found in the brains of patients with Alzheimer's disease. We have developed a software package “Synu” for investigation of 3D data sets which has been used in conjunction with laser confocal light microscopy to study the structure of the neuritic plaque. Tissue sections of autopsy samples from patients with Alzheimer's disease were double-labeled for tau, a cytoskeletal marker for abnormal neurites, and synaptophysin, a marker of presynaptic terminals.

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