TMJsim - Simulator for Assisting Diagnosis, Pre-Surgical Planning, and Follow-Up of Maxillofacial Treatment

• Marta B. Villamil Unisinos
• Eduardo Garcia Unisinos
• Robson Machado da Rosa Unisinos

Abstract

The use of jaw motion simulators in dentistry education, orthodontic adjustment of occlusions, or in the preoperative planning of craniofacial surgery can be extremely useful, improving diagnosis and postoperative treatment. This article presents the TMJsim, a simulator of mandible motion constructed from real data coming from Computed Tomography and Magnetic Resonance images. The virtual joints model which composes the simulator receives points captured from the lower incisal point motion. The contribution of each muscle in temporomandibular movement is approached from the implementation of Hill actuators model and the concept of curves of insertion.

References

Hill, A. The heat of shortening and the dynamic constants in muscle.Proc.Roy.Soc.London, v. 126, p. 136_195, 1938

Lemoine, J. J.; Xia, J. J.; Gateno, J.; Liebschner, M. A. K. Radiographic Analysis for Jaw Motion Normalization. Journal of Oral Maxillofacial Surgery, [S.l.], v.63, p.961–967, 2005.

Lepera, F. Determination of the hinge axis clutches on condyle position. Journal of Prosthetic Dentistry, [S.l.], v.8, p.260, 1958.McNeill C. Ciência e Prática da Oclusão. 1 ed, Ed. Quintessence, São Paulo, 2000

Olszewski, R.; Villamil, M. B.; Trevisan, D. G.; Nedel, L. P.; Freitas, C. M.; Reychler H.; Macq, B. Towards an integrated system for planning and assisting maxillofacial orthognathic surgery. Computer methods and programs in biomedicine, [S.l.], v.91, n.1, p.13–21, 2008.

Sifakis, E.; Neverov, I.; Fedriw, R. Automatic determination of facial muscle activations from sparse motion capture marker data. ACM Trans. Graph. (Proc. SIGGRAPH, n. 24, p. 417_425, 2005.

SLICER software (2005). [link]

Stavness, I. et al. An integrated, dynamic jaw and laryngeal model constructed from CT data. In: Proc ISBMS06 in Springer LNCS 4072. [S.l.]: Springer, 2006. p.169_177.

Stavness, I. et al. Towards predicting biomechanical consequences of jaw reconstruction. Conf Proc IEEE Eng Med Biol Soc, v. 2008, p. 4567_4570, 2008.

Villamil M. B., Nedel L. P., Freitas C. S., Machado R.S, Silveira R. L., Silva A. M. M. Simulação do Movimento da Mandíbula e Comportamento da Articulação Temporomandibular. In V Workshop de Informática Médica (WIM´2005), Porto Alegre, Brazil, June 2005.

Villamil, M. B. Modelagem e Simulação da Articulação Tempromandibular. Tese de Doutorado, Universidade Federal do Rio Grande do Sul, 2009.

Garcia, E. Modelagem e Simulação dos Músculos Tempormandibulares. Dissertação de Mestrado, 2011.

Zwemer, T. J. Boucher´s Clinical Dental Terminology, ed 3 St Louis: Mosby, 1993