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Temporomandibular joint model: anatomic and radiologic comparison between rat and human

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Abstract

Purpose

The temporomandibular joint (TMJ) is a complex anatomic structure with various pathologies as fractures, ankylosis or degenerative diseases. Few animal models already exist and the current study aims at demonstrating that rats’ TMJ could be considered as a model, using anatomic dissection and radiology.

Methods

Five adult Wistar rats were dissected to explore the soft and bone anatomy of the TMJ. Five more adult Wistar rats underwent a CT scan to measure size and angles of the condyle.

Results

The angles between the condyle and the mandible corpus were observed to be different both in the sagittal plane (150° vs. 125° in human) and the transversal plane (140° vs. 180°). The condyle axis is sagittal and drop-shaped and there is no anterior eminence in rats’ temporal fossa. However, the other anatomic structures proved to be quite similar.

Conclusions

The temporomandibular joints in human and rat are close and only few anatomic differences have been reported. Rats thus appear as an interesting and cheap alternative to model TMJ.

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Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Maxillofacial Surgery Unit, CHU Grenoble, Grenoble, France

    Emmanuelle Orset & Georges Bettega

  2. LADAF, Anatomy Laboratory, University Joseph Fourier, Grenoble, France

    Emmanuelle Orset & Philippe Chaffanjon

Authors
  1. Emmanuelle Orset
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  2. Philippe Chaffanjon
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  3. Georges Bettega
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Corresponding author

Correspondence to Emmanuelle Orset.

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Orset, E., Chaffanjon, P. & Bettega, G. Temporomandibular joint model: anatomic and radiologic comparison between rat and human. Surg Radiol Anat 36, 163–166 (2014). https://doi.org/10.1007/s00276-013-1159-4

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  • DOI: https://doi.org/10.1007/s00276-013-1159-4

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