New technique of producing removable complete denture using rapid tooling approach
This thesis presents the development of a new approach for denture fabrication process by implementing the techniques used in the advanced manufacturing technology involving Computer Aided Design (CAD) and Rapid Tooling (RT) process. A 3D-ATOS scanning system was used to obtain the surface dat...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2342/1/24p%20NORANIAH%20KASSIM.pdf http://eprints.uthm.edu.my/2342/ |
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| Summary: | This thesis presents the development of a new approach for denture
fabrication process by implementing the techniques used in the advanced
manufacturing technology involving Computer Aided Design (CAD) and Rapid
Tooling (RT) process. A 3D-ATOS scanning system was used to obtain the surface
data of the edentulous model, occlusion rims of the patient and the teeth set received
from the dental clinic. The scanned surface was refined using the Geomagic Studio
10 and then converted to IGES format for CAD application. A SolidWork version
2010 was used for designing reference lines, imaginary plane and setup curves to the
3D images of the scanned components. This was used as a reference for denture
assembly in which, the design were followed to the occlusion and teeth arrangement
principles and the data would then be stored in a CAD library for future design. Then
maxilla anterior, maxilla posterior and mandible anterior teeth were assembled one
by one while mandible posterior teeth were assembled by collision detection.
Chewing detection was also conducted to check the contact region between upper
and lower teeth by using interference detection technique. Then, new freeform
surfaces were created for gingival and base plate. The complete dentures design were
converted to STL format for production of master pattern using the Multi Jet
Modelling (MJM) machine, one of the rapid prototyping (RP) technique. The pattern
was used in the silicon rubber mould for vacuum casting process. Cold cure acrylic
resin (VERTEX, Castavaria) was used as the denture material and casted in the
silicone mould. Different degassing times were studied to reduce porosity dentures
parts. Then, the final dentures were polished and tested on edentulous model to test
the bite and adaptability. The finished denture was tested on patient edentulous to
ensure the adaptability and comfortability. The result for the denture was found to be
satisfactory and has good accuracy. While, from mechanical properties result was
found the cold cure material which produced from the vacuum casting process has |
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