[Research and development of computer aided design and rapid prototyping technology for complete denture].
OBJECTIVE
To explore a computer aided design (CAD) and rapid prototyping (RP) approach for fabrication of complete denture and to develop relevant programs for implementing it.


METHODS
Automatic crossing section scanner was used to scan artificial teeth and 3D graphic database of artificial teeth that could be aligned with parameters was established. A 3D laser scanner was used to scan upper and lower edentulous jaw casts and rims made in clinic. The vertical and horizontal relations were recorded before scanning with a patient instrument. Based on Imageware 11, tooth-arrangement curves, coordinate system, and landmark points for positioning were created, and construction cure and shape-controlling curve for base plate were constructed as well. Three-dimensional integrated design of complete denture, including artificial tooth automatic arrangement, aesthetic and individualized design of base plate, and artificial gingival, were finished. The programs were developed following the approach and the CAD platform was established. The virtual molds of complete dentures were constructed according to the above data in design and RP technology was used to make the plaster molds. Finally, the teeth were inserted and the complete denture was finished by dental technician.


RESULTS
The approach for the complete denture CAD/RP was confirmed and the CAD software platform was developed. A complete denture was manufactured.


CONCLUSIONS
The rules for complete denture in textbooks were expressed in design process with the CAD program developed by researcher. The 3D data of rims were utilized in design so that the digital, intelligentized and individualized design and manufacture process for complete denture was implemented.
Sun
Yu-chun
YC
Research Center of Engineering and Technology for Dental Computing, Ministry of Health, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Lü
Pei-jun
PJ
Wang
Yong
Y
Han
Jing-yun
JY
Zhao
Jian-jiang
JJ
D017076:Computer-Aided Design; D003824:Denture, Complete; D006801:Humans; D012985:Software Design