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Beijing Da Xue Xue Bao Yi Xue Ban ; 43(1): 140-4, 2011 Feb 18.
Artículo en Chino | MEDLINE | ID: mdl-21321638


OBJECTIVE: To explore the technical guideline of inlays computer aided design (CAD) for further development, to test the feasibility of processing for the design results of the technical guideline, and to assist co-operation with automatic inlay CAD software development. METHODS: On the basis of point cloud data of right mandibular first molar of standard crown, we established the coordinate system,the landmarks and lines and the characteristic curves. A dental cast of right mandibular first molar MOD-inlay of an individual normal occlusion was scanned. The following objects were digitized: prepared tooth, neighbor teeth and intercuspal bite record. On the basis of parametric standard crown established in the research, using Surfacer 11.0, we achieved the reconstruction of MOD-inlay by extracting margin line, constructing tissue surface, constructing outer surface and occlusal grinding, then the design result was processed and try-in on the cast. We also developed automatic inlay CAD software based on the guideline of inlay CAD. RESULTS: The guideline of inlay CAD was established, the design results were processed and an automatic inlay CAD software was developed on basis of Surfacer 11.0. CONCLUSION: It is a feasible method to establish technical guideline of inlay based on reverse engineering technology and process its design result, and a automatic inlay CAD software could be developed based on the technical guideline.

Diseño Asistido por Computadora , Diseño de Prótesis Dental/métodos , Incrustaciones/métodos , Diseño de Software , Coronas , Humanos , Imagenología Tridimensional
Zhonghua Kou Qiang Yi Xue Za Zhi ; 45(10): 631-4, 2010 Oct.
Artículo en Chino | MEDLINE | ID: mdl-21176603


OBJECTIVE: To establish the computer aided design (CAD) software platform of individualized abutment for the maxilla central incisor. METHODS: Three-dimentional data of the incisor was collected by scanning and geometric transformation. Data mainly included the occlusal part of the healing abutment, the location carinae of the bedpiece, the occlusal 1/3 part of the artificial gingiva's inner surface, and so on. The all-ceramic crown designed in advanced was "virtual cutback" to get the original data of the abutment's supragingival part. The abutment's in-gum part was designed to simulate the individual natural tooth root. The functions such as "data offset", "bi-rail sweep surface" and "loft surface" were used in the process of CAD. RESULTS: The CAD route of the individualized all-ceramic abutment was set up. The functions and application methods were decided and the complete CAD process was realized. CONCLUSIONS: The software platform was basically set up according to the requests of the dental clinic.

Cerámica , Diseño Asistido por Computadora , Diseño de Prótesis Dental , Coronas , Implantes Dentales , Porcelana Dental , Humanos , Incisivo , Maxilar
Zhonghua Kou Qiang Yi Xue Za Zhi ; 42(6): 324-9, 2007 Jun.
Artículo en Chino | MEDLINE | ID: mdl-17888244


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.

Diseño Asistido por Computadora , Dentadura Completa , Humanos , Diseño de Software
Zhonghua Kou Qiang Yi Xue Za Zhi ; 40(1): 70-3, 2005 Jan.
Artículo en Chino | MEDLINE | ID: mdl-15774158


OBJECTIVE: This study was to explore a CAD method for constructing occlusal and proximal surfaces of inlays using reverse engineering (RE) software and to develop a CAD software for the inlay fabrication. METHODS: The dentition model of a volunteer with individual normal occlusion was scanned with a 3D mechanical scanner. The scanned objects were prepared teeth with G. V. Black class I, class II and class VI (MOD) cavities, neighbor teeth, intercuspal position (ICP) record, and functional bite record (or functional generate path, FGP). Inlays were constructed based on RE technology using the database of Chinese normal teeth. RESULTS: The technique guideline of inlay CAD was developed based on RE softwares. Inlays designed with CAD technique showed smooth and continuous contours. The occlusal and proximal contacts of inlay met physiologic demands. CONCLUSIONS: It is a feasible method to develop a CAD software for inlay fabrication based on RE software.

Diseño Asistido por Computadora , Oclusión Dental , Diseño de Prótesis Dental/métodos , Incrustaciones , Adulto , Modelos Dentales , Humanos , Masculino