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Related Experiment Videos

Condylar changes after contralateral mandibular osteotomy in the rabbit.

K Ueki1, K Nakagawa, S Takatsuka

  • 1Department of Oral and Maxillofacial Surgery, School of Medicine, Kanazawa University, Japan. kueki@med.kanazawa-u.ac.jp

Journal of Cranio-Maxillo-Facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery
|June 28, 2000
PubMed
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Unilateral mandibular osteotomy in rabbits caused significant contralateral temporomandibular joint (TMJ) morphological changes. These findings suggest biological adaptation in the TMJ following surgical procedures.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Orthodontics
  • Comparative Anatomy

Background:

  • Orthognathic surgery can lead to undesirable temporomandibular joint (TMJ) changes.
  • Altered stress on the condyle and surrounding tissues often results in TMJ morphological alterations.

Purpose of the Study:

  • To assess TMJ morphologic changes in rabbits after mandibular osteotomy and body rotation.
  • To investigate the contralateral TMJ response to unilateral mandibular surgery.

Main Methods:

  • Adult male Japanese white rabbits underwent experimental unilateral mandibular osteotomy.
  • A vertical osteotomy of the mandibular body was performed, followed by osseous segment fixation.

Main Results:

  • The contralateral (left) condylar medio-lateral width was significantly larger than the ipsilateral (right) side at 2 weeks postoperatively.

Related Experiment Videos

  • Significant differences in the angle between condylar heads were observed at 4 weeks postoperatively.

    • Conclusions:

    • Unilateral mandibular osteotomy induces morphological changes in the contralateral TMJ.
    • These postoperative changes indicate a biological adaptation process within the rabbit TMJ.