Abstract:

Introduction
Education and knowledge adapted to the new educative systems, as it is the Bologna plan, require more and more of the new technologies for the educational support. Informatics applied to biomedical teaching contributes great advantages, mainly facing the students. In dentistry in particular, the creation of virtual simulators brings a great advance in areas like Anatomy. For this reason, we created a three-dimensional virtual model of the maxilo-mandibular system based on a real infantile specimen that serves as a support in the education of the paediatric anatomy of the maxilomandibular system.

Objectives
The main objective of this project is the creation of a virtual model of the jaw, based on real and infantile subject that serves as an educative tool in the scope of the Paediatric Dentistry Anatomy.
SECONDARY OBJECTIVES
1- To make the three-dimensional representation of each germ of the permanent tooth.
2- To execute the three-dimensional image of each of all the present temporary teeth in the analysed infantile human head.

Material and method
We obtained tomographic cuts of the craniofacial skeleton of a girl of three years of age that were transcribed to the program Amira 5.3.0. On them we segmented and named of all the mandibular structures: temporary jaw, teeth and permanent teeth.

Results
A total of 512 cuts were obtained in sagittal and coronal planes and 309 in the cross-sectional plane of a thickness of 0,625 mm. In different colors we segmented the totality of 25 structures to geenerate a three-dimensional mandibular model.

Discussion
The Visible Human Project was the pioneer in the creation of an anatomical data base with real sections of an adult man and a woman. Later, projects such as the Voxel Men have applied these libraries to generate surgical simulators, and atlas that included the bucodental area. Nevertheless, we did not find any reference to the creation of a virtual model on infantile specimen, like the one developed in our project.

Conclusions
1. The arrival of the educative system based on the Bologna Plan is a reality. The self-training based on test and error, is a strategy of extreme utility for the student. With an interactive model, the student is able to value his knowledge instantaneously, and the presence of a professor is not essential at all times.
2. Through this real model, we have described the anatomical study of the temporary teething, as well as its interactions with the developing permanent teething, of a three-dimensional form.
3. The images secured on the germs of the developing permanent teeth in this work of investigation, allow us to evaluate these structures of individual and three-dimensional form in a human subject of three years of age.
4. In future studies we aim to direct our research to the creation of the model to maxilar for thus being able to count on the complete maxilo-mandibular complex, being interesting also, the possibility of granting improvements in the technological advances, like the inclusion of haptic systems for the clinical application to education in Dentistry.

Keywords:

3D model, Paediatric Dentistry, Jaw.