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Related Experiment Videos

Mandibulotomy fixation: a laboratory analysis.

Stephen L Engroff1, Remy H Blanchaert, J Anthony von Fraunhofer

  • 1Tri-County Oral-Facial Surgeons, 211 W. Beaver Avenue, State College, PA 16801, USA. engroff@tricountyoral.com

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
|November 13, 2003
PubMed
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Two 2.0-mm locking plates offered superior stability for mandibular osteotomies. This fixation method demonstrated the greatest resistance to vertical load and improved flexion compared to other plating configurations.

Area of Science:

  • Maxillofacial surgery
  • Biomechanical engineering
  • Orthognathic surgery

Background:

  • Mandibulotomy, an access osteotomy, is linked to significant complications.
  • Selecting the most stable fixation system is crucial for minimizing these complications.
  • Existing plating systems require critical evaluation to determine optimal stability.

Purpose of the Study:

  • To compare the stability of traditional plating configurations against a novel low-profile 2.0-mm locking plate.
  • To provide data on the biomechanical performance of different fixation methods for mandibular osteotomies.
  • To evaluate the mandibular locking plate (Synthes MLP) for its stability in osteotomy repair.

Main Methods:

  • An in vitro study using red oak models to simulate mandibular bone.

Related Experiment Videos

  • Five fixation groups were tested: two nonlocking miniplates, two locking plates, one locking plate, one rigid nonlocking plate, and a control.
  • Vertical loads were applied to the osteotomy site, and force-displacement behavior was statistically analyzed.

    • Main Results:

    • Plate type and configuration significantly influenced resistance to vertical load and fixation stiffness.
    • The configuration with two 2.0-mm locking plates (group 2) exhibited the highest peak load (58.92 kgf) and stiffness (7.07 kgf/mm).
    • Group 2 specimens showed enhanced resistance to flexion, with statistically significant differences in stiffness and peak load compared to other groups.

    Conclusions:

    • Two 2.0-mm locking plates provide superior biomechanical stability for mandibular osteotomies.
    • This fixation method offers the greatest resistance to vertical load among the tested configurations.
    • The findings support the use of dual 2.0-mm locking plates for improved outcomes in mandibulotomy procedures.