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Related Experiment Videos

Plate fixation after mandibular osteotomy.

K Ueki1, K Nakagawa, S Takatsuka

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

International Journal of Oral and Maxillofacial Surgery
|February 7, 2002
PubMed
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Bent titanium plates in orthognathic surgery help maintain condylar position, reducing temporomandibular joint (TMJ) disorder risk after bisagittal split osteotomy (BSSO). This approach shows promise for better surgical outcomes.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Orthodontics
  • Biomedical Engineering

Background:

  • Skeletal asymmetry often leads to temporomandibular joint (TMJ) disorders post-orthognathic surgery.
  • Condylar rotation during bisagittal split osteotomy (BSSO) is a primary cause of these TMJ issues.

Purpose of the Study:

  • To investigate the relationship between condylar long axis changes and TMJ function after BSSO.
  • To evaluate the efficacy of bent titanium plates in preventing condylar displacement and preserving TMJ function.

Main Methods:

  • A study involving 42 patients with mandibular prognathism undergoing BSSO.
  • Comparison of standard titanium plates (n=22) versus custom-adjusted bent titanium plates (n=20) for fragment fixation.
  • Preoperative and postoperative cephalometric analysis (submental-vertical views) to assess condylar position and long axis changes.

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Main Results:

  • Significant differences in condylar long axis were observed between standard and bent plate groups (P<0.05).
  • No TMJ functional impairment was detected in patients treated with bent titanium plates.
  • Bent plates were adjusted to counteract predicted condylar displacement.

Conclusions:

  • Bent titanium plates may be effective in maintaining optimal condylar position during BSSO.
  • Preserving the condyle's position is crucial for successful BSSO outcomes and preventing TMJ disorders.
  • Further research is warranted to confirm the long-term benefits of bent plates in orthognathic surgery.