The role of three-dimensional imaging in patients with cleft lip and palate

2013 ◽  
Vol 4 (3) ◽  
pp. 118-123
Author(s):  
Lauren Gardner ◽  
Toby Gillgrass ◽  
Mark Devlin
Keyword(s):  
Computer Aided Design ◽  
3D Imaging ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Three Dimensional ◽  
Optical Scanning ◽  
Fixed Prosthodontics ◽  
Computer Aided ◽  
Dental Hospital ◽  
Aided Design

Three-dimensional (3D) imaging is revolutionising patient assessment, diagnosis, management and treatment planning. Restorative dentistry is using optical scanning such as the computer aided design/computer aided manufacture systems to help with tooth preparation design and construction of fixed prosthodontics. Other specialties in dentistry are frequently employing cone beam computed tomography (CBCT) to facilitate 3D imaging. This article outlines how CBCT and 3D sterophotogrammetry have been used in the management of cleft lip and palate with reference to the cleft team based at Glasgow Dental Hospital.

Evaluation of the Clinical Effectiveness of Nasoalveolar Molding (NAM) Using Grayson Method Versus Computer-Aided Design NAM (CAD/NAM) in Infants With Bilateral Cleft Lip and Palate: A Randomized Clinical Trial

2021 ◽  
pp. 105566562199015
Author(s):  
Noha A. El-Ashmawi ◽  
Mona M. Salah Fayed ◽  
Amr El-Beialy ◽  
Khaled H. Attia
Keyword(s):  
Computer Aided Design ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Comparative Trial ◽  
Clinical Effectiveness ◽  
3 Dimensional ◽  
Computer Aided ◽  
Aided Design ◽  
Nasoalveolar Molding ◽  
Maxillary Arch

Objective: The aim is to compare between the clinical effectiveness of nasoalveolar molding (NAM) versus the computer-aided design NAM (CAD/NAM) in patients with bilateral clefts. Design: The trial is a randomized comparative trial with 1:1 allocation ratio. Participants: Thirty infants with bilateral complete cleft lip and palate were recruited. Interventions: Patients were randomized between NAM and CAD/NAM groups. The treatment steps described by Grayson were followed for the NAM group. In the CAD/NAM group, digitized maxillary models were made to create series of modified virtual models which were used to fabricate the molding plates using 3-dimensional printing technology. The nasal stents were then added to the plates following Grayson method. The study lasted for 4 months. Main Outcomes: The primary outcome was to evaluate the changes in the intersegment cleft gap. Secondary outcomes included the analysis of the maxillary arch in transverse, anteroposterior, and vertical dimensions as well as the premaxillary deviation and rotation. Chair side time was assessed for both methods. Results: Both modalities decreased the intersegment cleft gap. The CAD/NAM plates caused more reduction in the total arch length by 1.99 mm (−3.79 to 0.19, P = .03) as compared to the NAM treatment. No differences were found between groups in the transverse and vertical maxillary arch changes. Conclusions: Both interventions were effective in narrowing the cleft gap. Similar maxillary changes were found in both groups. The CAD/NAM modality required less chair side time compared to the NAM treatment.

scholarly journals Automatized Evaluation of Students’ CAD Models

2021 ◽  
Vol 11 (4) ◽  
pp. 145
Author(s):  
Nenad Bojcetic ◽  
Filip Valjak ◽  
Dragan Zezelj ◽  
Tomislav Martinec
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Application ◽  
Test Cases ◽  
Cad Model ◽  
Computer Solution ◽  
3D Cad ◽  
Computer Aided ◽  
Cad Models ◽  
Aided Design

The article describes an attempt to address the automatized evaluation of student three-dimensional (3D) computer-aided design (CAD) models. The driving idea was conceptualized under the restraints of the COVID pandemic, driven by the problem of evaluating a large number of student 3D CAD models. The described computer solution can be implemented using any CAD computer application that supports customization. Test cases showed that the proposed solution was valid and could be used to evaluate many students’ 3D CAD models. The computer solution can also be used to help students to better understand how to create a 3D CAD model, thereby complying with the requirements of particular teachers.

Determination of the Workspace of a Three-Degrees-of-Freedom Parallel Manipulator Using a Three-Dimensional Computer-Aided-Design Software Package and the Concept of Virtual Chains1

2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Andrew Johnson ◽  
Xianwen Kong ◽  
James Ritchie
Keyword(s):  
Computer Aided Design ◽  
Parallel Manipulator ◽  
Degrees Of Freedom ◽  
Graphical Representation ◽  
Three Dimensional ◽  
Parallel Manipulators ◽  
Workspace Analysis ◽  
Computer Aided ◽  
Aided Design

The determination of workspace is an essential step in the development of parallel manipulators. By extending the virtual-chain (VC) approach to the type synthesis of parallel manipulators, this technical brief proposes a VC approach to the workspace analysis of parallel manipulators. This method is first outlined before being illustrated by the production of a three-dimensional (3D) computer-aided-design (CAD) model of a 3-RPS parallel manipulator and evaluating it for the workspace of the manipulator. Here, R, P and S denote revolute, prismatic and spherical joints respectively. The VC represents the motion capability of moving platform of a manipulator and is shown to be very useful in the production of a graphical representation of the workspace. Using this approach, the link interferences and certain transmission indices can be easily taken into consideration in determining the workspace of a parallel manipulator.

Sign in / Sign up

Export Citation Format

Share Document