Reconstruction of anterior guidance using duplication technique of CAD/CAM: a case report

Ji-Cheol Bae; Won-Hee Kim; Yong-Chan Jeon; Chang-Mo Jeong; Mi-Jung Yoon; Jung-Bo Huh

doi:10.4047/jkap.2014.52.2.121

Journal List > J Korean Acad Prosthodont > v.52(2) > 1034778

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Bae, Kim, Jeon, Jeong, Yoon, and Huh: Reconstruction of anterior guidance using duplication technique of CAD/CAM: a case report

CASE REPORT

J Korean Acad Prosthodont 2014;52(2):121-127.

Published online: 18 December 2014

DOI: https://doi.org/10.4047/jkap.2014.52.2.121

Reconstruction of anterior guidance using duplication technique of CAD/CAM: a case report

Ji-Cheol Bae¹, Won-Hee Kim², Yong-Chan Jeon¹, Chang-Mo Jeong¹, Mi-Jung Yoon¹, Jung-Bo Huh^1,^∗

^¹Department of Prosthodontics, School of Dentistry, Pusan National University, Yangsan, Republic of Korea

^²Goodwill Dental Hospital, Pusan, Republic of Korea

∗Corresponding Author: Jung-Bo Huh Department of Prosthodontics, School of Dentistry, Pusan National University, Beomeo-ri, Mulgeum-eup, Yangsan, 626-870, Korea +82 55 360 5144: e-mail, neoplasia96@daum.net

Received 24 January 201431 March 2014 Accepted 2 April 2014

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

Comprehensive prosthetic treatment requires considerations from various points of view. The anterior guidance is important factor in prosthodontic treatment of anterior teeth. Lingual surface contour of anterior restoration is so critical that a small mistake of laboratory or clinical process can cause discomfort of patient and disharmony of entire dentition. There are no guidelines for lingual surface contour that fit all patients. Therefore the lingual surface of provisional restoration is most accurately described as a customized one. The dentist transfers the exact information of anterior guidance that has made through long term provisional restoration to the technician. This case introduce that the duplication technique of CAD/CAM system to reproduce the anterior guidance of provisional restoration. This method can improve satisfaction of both patient and dentist.

Keywords: CAD-CAM, Dental occlusion, Occlusal guidance, Dental restoration

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Fig. 1.

Intraoral view of the patient's preoperative condition showing abrasion-corrosion lesion and loss of vertical dimension. (A, E) Occlusal view of maxilla and mandible, (C) Frontal view, (B, D) Lateral view.

Fig. 2.

Panoramic view at first visit.

Fig. 3.

(A) The new VDO was set by 2.5 mm increase in the anterior teeth (using leaf gage), (B, C, D) Diagnostic wax-up was done on the new VDO.

Fig. 4.

Provisional restorations made from a cast of diagnostic wax-up. (A) Frontal view, (B, C) Occlusal view.

Fig. 5.

Provisional restorations are reviewed for function prior to making final impressions. (A) Right eccentric position, (B) Left eccentric position, (C) Protrusive position.

Fig. 6.

Digitally overlap image of maxillary prepared and temporary teeth. (A) Frontal view, (B) Occlusal view.

Fig. 7.

Manufacture anterior teeth one by one by the Correlation method. (A) Right lateral incisor image, (B) Left central incisor image, C: Left canine image.

Fig. 8.

(A) Final restorations, (B) Maxillary anterior section and premolars restored with CAD/CAM-designed and -milled monolithic lithium disilicate restorations, molars restored with monolithic zirconia restorations, (C) Mandibular premolars, except for the left second premolar, restored with monolithic lithium disilicate restorations, and remaining molars restored with monolithic zirconia restorations.

Fig. 9.

(A) Arrow indicate the depression generated on the provisional restoration from lateral guide of canine during adaptation period of the patient carrying provisional restoration, (B) Duplication of the depression on CAD process, (C) The features of provisional restoration being reproduced on the final prosthesis too.

Fig. 10.

Final posterior restoration was set with anterior provisional guide being maintained. (A) Right eccentric position, (B) Protrusive position, (C) Left eccentric position.

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