MIRACLE: A CAD/CAM System for the Manufacture of Dental Surgical Splints

Nowadays, design and manufacturing process of dental prostheses is very handmade, time consuming and has a raised economic cost. Besides that, there is no objective methodology for the fulfillment of its functional design specifications. This paper presents an overview of MIRACLE project whose objective is the development and validation of an intelligent system for the design, simulation and flexible manufacture of implant-supported dental prostheses. The developed system in MIRACLE is a CAD/CAM system which allows to test the functional characteristics of dental prostheses considering mandible-maxilla interaction (called occlusion) using virtual models, contrary to most commercial solutions where this test is performed using expensive anatomical replicas tested with mechanical articulators and evaluated with patients. Another objective of MIRACLE is to develop a parametric finite elements model (FEM) of the whole prosthesis in order to analyze the failure risk of dental implants and prostheses before its surgical implantation enabling a re-design process. This paper is focused on the CAD/CAM subsystem developed in order to automatize the process of manufacturing surgical guides using several 3D models of the patient dental anatomy. A summarized version of the image processing step will be also presented. The CAD/CAM subsystem has been clinically validated achieving mean errors less than 5 degrees in the placement of the prosthetic crowns.

[1]  U Joos,et al.  [Osteoblast reaction on SLA and microgrooved implant surfaces]. , 2005, Mund-, Kiefer- und Gesichtschirurgie : MKG.

[2]  Roberto Uribe,et al.  Marginal peri-implantitis due to occlusal overload. A case report. , 2004, Medicina oral : organo oficial de la Sociedad Espanola de Medicina Oral y de la Academia Iberoamericana de Patologia y Medicina Bucal.

[3]  Mariano Alcañiz Raya,et al.  Validation of Fuzzy Connectedness Segmentation for Jaw Tissues , 2009, IWINAC.

[4]  Mariano Alcañiz Raya,et al.  A New Approach in Metal Artifact Reduction for CT 3D Reconstruction , 2009, IWINAC.

[5]  P A Schnitman,et al.  Immediate fixed interim prostheses supported by two-stage threaded implants: methodology and results. , 1990, The Journal of oral implantology.

[6]  A Schroeder.  [The ITI hollow-cylinder implant. Internationales Team für orale Implantologie]. , 1985, Schweizerische Monatsschrift fur Zahnmedizin = Revue mensuelle suisse d'odonto-stomatologie = Rivista mensile svizzera di odontologia e stomatologia.

[7]  Rafiq Noorani,et al.  Rapid prototyping : principles and applications , 2006 .

[8]  K. S. Arun,et al.  Least-Squares Fitting of Two 3-D Point Sets , 1987, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[9]  A Schroeder,et al.  [The ITI hollow-cylinder implant (II). Indications--practical preparations]. , 1981, Die Quintessenz.

[10]  H V Worthington,et al.  Interventions for replacing missing teeth: dental implants in fresh extraction sockets (immediate, immediate-delayed and delayed implants). , 2006, The Cochrane database of systematic reviews.

[11]  Emilio Nuzzolese,et al.  Immediate loading of two single tooth implants in the maxilla: preliminary results after one year. , 2005, The journal of contemporary dental practice.

[12]  Paul J. Besl,et al.  A Method for Registration of 3-D Shapes , 1992, IEEE Trans. Pattern Anal. Mach. Intell..

[13]  W H Mörmann,et al.  The origin of the Cerec method: a personal review of the first 5 years. , 2004, International journal of computerized dentistry.

[14]  Andreas Gebhardt,et al.  Rapid prototyping , 2003 .