Surveyed restoration and RPD framework design utilizing electronic surveying

Yong-Shin Hong; Eun-Jin Park; Seong-Kyun Kim; Jai-Young Koak; Seong-Joo Heo; Ji-Man Park

doi:10.4047/jkap.2011.49.4.354

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Hong, Park, Kim, Koak, Heo, and Park: Surveyed restoration and RPD framework design utilizing electronic surveying

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J Korean Acad Prosthodont 2011;49(4):354-361.

Published online: 18 December 2011

DOI: https://doi.org/10.4047/jkap.2011.49.4.354

Surveyed restoration and RPD framework design utilizing electronic surveying

Yong-Shin Hong, DDS¹, Eun-Jin Park, DDS, PhD¹, Seong-Kyun Kim, DDS, PhD², Jai-Young Koak, DDS, PhD², Seong-Joo Heo, DDS, PhD², Ji-Man Park, DDS, PhD^1,^∗

^¹Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul

^²Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Korea

∗Corresponding Author: Ji-Man Park Department of Prosthodontics, School of Medicine, Ewha Womans University, 911-1 Mok-5dong, Yangchoen-gu, Seoul, 158-710, Korea +82 2 2650 5631: e-mail, jimarn@ewha.ac.kr

Received 17 October 201119 October 2011 Accepted 24 October 2011

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

There are still many limitations on fabricating dentures using digital method while computerized production of fixed prostheses utilizing intraoral scanner and CAD/CAM technology has propagated rapidly. Recently the digital solution of fabricating removable partial denture by applying haptic input device, electronic surveying, and rapid prototyping was introduced. In this case presentation, five patients were treated with surveyed crown and removable partial dentures by this digital solution. Fit of dentures was excellent except for one case which showed morphological difference between the actual teeth and that of master cast by the erroneous impression process. There also was not any problem of stability and retention after adaptation in the clinical setting. (J Korean Acad Prosthodont 2011;49:354-61)

Keywords: Haptic input device, Electronic surveying, CAD, Rapid prototyping

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Fig. 1.

Initial photograph of clinical case 1. A, B: initial occlusal view, C, D: the solid computer model of the patient's cast, E: initial panoramic view.

Fig. 2.

Surveyed crown fabrication utilizing electronic surveying. (Case 1) A: clinical photo after hemi-section surgery of lower right first molar, B: after preparation for surveyed restoration, C: electronic view of abutment teeth after setting ‘path of insertion’, D: completed surveyed crown.

Fig. 3.

Computer-aided designing procedures of case 1. A: haptic input device and FreeForm CAD software, B: electronic surveying, C: occlusal rest and minor connector designing, D: retentive tip goes below ‘height of contour’ (light blue color) and into the notch (rainbow color) made during electronic surveying, E, F: completed upper and lower framework design with sprue structure for metal casting.

Fig. 4.

Framework fit check procedure at patient 1. A: Occlusal view of upper arch, B: framework fits well on lower teeth.

Fig. 5.

Summarized photographs of case 2. A: the solid computer model of the patient's cast, B: electronic surveying and framework design on FreeForm software, C: completed framework on master cast, D: final prosthesis put on patient's upper arch.

Fig. 6.

Summarized photographs of case 3. A: scanning procedure, B: completed framework design, C: framework fit check on master model, D: final prosthesis in the mouth.

Fig. 7.

Summarized photographs of case 4. A: occlusal view after natural teeth alteration, B: completed framework design, C: tissue surface of framework and characteristic contour line on palate area, D: final prosthesis put on patient's upper arch.

Fig. 8.

Summarized photographs of case 5. A, B: initial occlusal view, C, D: digital surveying and CAD design, E: tissue surface of upper framework (contour line), F: completed lower framework with individual tray for functional impression of distal extension base, G, H: final prostheses.

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