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New procedure for fully automatic occlusal surface reconstruction by means of a biogeneric tooth model
THE JOURNAL OF PROSTHETIC DENTISTRY
Evaluate the cast with accurate gingival contours and removable analog. Use this cast during the ceramic layering process and mounted in the articulator as a gross guide for occlusion. Do not use for fine occlusal adjustments. The authors thank Michel Magne (Associate Professor, Division of Primary Oral Health Care, University of Southern California, School of Dentistry) for the original concept of the hard-stone soft-tissue casts used in fixed prosthodontics, and Dr Terence E. Donovan for reviewing the English draft.
3. Cascione D, inventor and assignee. Analogo rimovibile per impianti dentali [Italian]. Removable dental implant analog. Italian patent BA2004A000018. May 4, 2004. Reprint requests to: DR PASCAL MAGNE UNIVERSITY OF SOUTHERN CALIFORNIA DIVISION OF PRIMARY ORAL HEALTH CARE 925 WEST 34TH ST, DEN 4366 LOS ANGELES, CA 90089-0641 FAX: 213-740-6778 E-MAIL: [email protected] 0022-3913/$32.00 Copyright Ó 2006 by The Editorial Council of The Journal of Prosthetic Dentistry.
REFERENCES 1. Magne P, Belser U. Laboratory procedures. In: Magne P, Belser U, editors. Bonded porcelain restorations in the anterior dentition. A biomimetic approach. Chicago: Quintessence; 2002. p. 293-321. 2. Chee WW, Cho GC, Ha S. Replicating soft tissue contours on working casts for implant restorations. J Prosthodont 1997;6:218-20.
Noteworthy Abstracts of the Current Literature
CASCIONE AND MAGNE
doi:10.1016/j.prosdent.2006.03.017
New procedure for fully automatic occlusal surface reconstruction by means of a biogeneric tooth model Mehl A, Blanz V. Int J Comput Dent 2005;8:13-25.
The goal of this study is to present a completely new procedure for automatic occlusal surface reconstruction and to test it in several inlay situations. The starting point is the mathematical analysis of a large number of occlusal surfaces from a tooth library. Learning algorithms used in pattern recognition and image processing were adapted for the special needs of dental morphology. A biogeneric tooth model resulted that can mathematically describe a certain type of tooth only with a few parameters. This model was tested on 40 simulated inlay situations and as an example on two clinical inlay situations. The results show that fully automatic reconstruction was possible except for 4 cases. In a majority of the cases, no further interactive improvements would have been necessary. Because of the general, theoretically well-founded approach, fully automatic reconstruction of the occlusal surface can also be extended in the future to full crowns or reduced crown substructures (copings).—Reprinted with permission of Quintessence Publishing.
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VOLUME 95 NUMBER 5
Evaluate the cast with accurate gingival contours and removable analog. Use this cast during the ceramic layering process and mounted in the articulator as a gross guide for occlusion. Do not use for fine occlusal adjustments. The authors thank Michel Magne (Associate Professor, Division of Primary Oral Health Care, University of Southern California, School of Dentistry) for the original concept of the hard-stone soft-tissue casts used in fixed prosthodontics, and Dr Terence E. Donovan for reviewing the English draft.
3. Cascione D, inventor and assignee. Analogo rimovibile per impianti dentali [Italian]. Removable dental implant analog. Italian patent BA2004A000018. May 4, 2004. Reprint requests to: DR PASCAL MAGNE UNIVERSITY OF SOUTHERN CALIFORNIA DIVISION OF PRIMARY ORAL HEALTH CARE 925 WEST 34TH ST, DEN 4366 LOS ANGELES, CA 90089-0641 FAX: 213-740-6778 E-MAIL: [email protected] 0022-3913/$32.00 Copyright Ó 2006 by The Editorial Council of The Journal of Prosthetic Dentistry.
REFERENCES 1. Magne P, Belser U. Laboratory procedures. In: Magne P, Belser U, editors. Bonded porcelain restorations in the anterior dentition. A biomimetic approach. Chicago: Quintessence; 2002. p. 293-321. 2. Chee WW, Cho GC, Ha S. Replicating soft tissue contours on working casts for implant restorations. J Prosthodont 1997;6:218-20.
Noteworthy Abstracts of the Current Literature
CASCIONE AND MAGNE
doi:10.1016/j.prosdent.2006.03.017
New procedure for fully automatic occlusal surface reconstruction by means of a biogeneric tooth model Mehl A, Blanz V. Int J Comput Dent 2005;8:13-25.
The goal of this study is to present a completely new procedure for automatic occlusal surface reconstruction and to test it in several inlay situations. The starting point is the mathematical analysis of a large number of occlusal surfaces from a tooth library. Learning algorithms used in pattern recognition and image processing were adapted for the special needs of dental morphology. A biogeneric tooth model resulted that can mathematically describe a certain type of tooth only with a few parameters. This model was tested on 40 simulated inlay situations and as an example on two clinical inlay situations. The results show that fully automatic reconstruction was possible except for 4 cases. In a majority of the cases, no further interactive improvements would have been necessary. Because of the general, theoretically well-founded approach, fully automatic reconstruction of the occlusal surface can also be extended in the future to full crowns or reduced crown substructures (copings).—Reprinted with permission of Quintessence Publishing.
400
VOLUME 95 NUMBER 5