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Rapid-prototyped temporal bone and inner-ear models replicated by adjusting computed tomography thresholds

  • M Suzuki (a1), A Hagiwara (a1), Y Ogawa (a1) and H Ono (a2)
Abstract
Purpose:

This study aimed to investigate the validity of adjusting computed tomography thresholds in order to replicate a temporal bone model suitable for dissection training and education.

Materials and methods:

A simulated three-dimensional model of a human temporal bone was prototyped using selective laser sintering. The powder layers were laser-fused, based on detailed computed tomography data, and accumulated to create a three-dimensional structure. The computed tomography threshold value of the stapes was modified on standard triangular language file in order to replicate the stapes. The intensity value was determined to select the fluid lumen of the inner ear and the bone surface, in order to replicate the inner ear.

Results:

The model could be shaved, using surgical instruments, in the same manner as during real surgery. The stapes could be reproduced, making this model even more realistic than a previous version. The inner ear was recreated, along with the surrounding bony wall and the ossicles.

Conclusion:

This model facilitates dissection training and easy understanding of the relation between the labyrinth and the surrounding structures.

Copyright
COPYRIGHT: © JLO (1984) Limited 2007
Corresponding author
Address for correspondence: Dr Mamoru Suzuki, Department of Otolaryngology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, Japan160-0023. Fax: +81 3 3346 9275 E-mail: otosuzu@tokyo-med.ac.jp
References
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1Suzuki, M, Ogawa, Y, Kawano, A, Hagiwara, A, Yamaguchi, H, Ono, H. Rapid prototyping of temporal bone for surgical training and medical education. Acta Otolaryngol 2004;124:400–2
2Suzuki, M, Ogawa, Y, Hagiwara, A, Yamaguchi, H, Ono, H. Rapid-prototyped temporal bone model for otological education. ORL J Otorhinolaryngol Relat Spec 2004;66:62–4
3Suzuki, M, Hagiwara, A, Kawaguchi, S, Ono, H. Application of a rapid-prototyped temporal bone model for surgical planning. Acta Otolaryngol 2005;125:29–32
4Morra, A, Tirelli, G, Rimondini, A, Cioffi, V, Russolo, M, Giacomarra, V, Pozzi-Mucelli, R. Usefulness of virtual endoscopic three-dimensional reconstructions of the middle ear. Acta Otolaryngol 2002;122:382–5
5Begall, K, Vorwerk, U. Artificial petrous bone produced by stereo lithography for microsurgical dissecting exercises. ORL J Otorhinolaryngol Relat Spec 1998;60:241–5
6Selesnick, SH, Kacker, A. Image-guided surgical navigation in otology and neurotology. Am J Otol 1999;20:688–93
7Federspil, PA, Geisthoff, UW, Henrich, D. Development of the first force-controlled robot for otoneurosurgery. Laryngoscope 2003;113:465–71
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The Journal of Laryngology & Otology
  • ISSN: 0022-2151
  • EISSN: 1748-5460
  • URL: /core/journals/journal-of-laryngology-and-otology
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