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Related Experiment Videos

[Postoperative evaluation in mandibular prognathism treated by bilateral sagittal split osteotomy]

J W Liou1, C S Huang, F L Wang

  • 1Department of Dentistry and Surgery, Chang Gung Memorial Hospital, Taipei, Taiwan, R.O.C.

Changgeng Yi Xue Za Zhi
|June 1, 1995
PubMed
Summary

Postoperative relapse after mandibular bilateral sagittal split osteotomy is common, with most horizontal and vertical relapse occurring within six months of fixation removal. The degree of relapse correlates with the extent of mandibular setback and vertical changes.

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Area of Science:

  • Orthognathic surgery
  • Craniofacial surgery
  • Dental implantology

Context:

  • Bilateral sagittal split osteotomy is a common surgical procedure for correcting mandibular deformities.
  • Understanding postoperative relapse is crucial for predicting long-term outcomes.
  • Cephalometric analysis provides quantitative data for evaluating skeletal changes.

Purpose:

  • To assess the rate and pattern of postoperative relapse following mandibular bilateral sagittal split osteotomy.
  • To investigate the correlation between the amount of mandibular setback and vertical dimension changes with relapse.
  • To analyze relapse from the period of unwiring to one year postoperatively.

Summary:

  • Twenty-seven patients undergoing mandibular bilateral sagittal split osteotomy were evaluated cephalometrically.

Related Experiment Videos

  • Average horizontal relapse at the pogonion was 2.3mm one year postoperatively, with 86% occurring in the first six months after fixation removal.
  • Average vertical relapse was 1.1mm one year postoperatively, with 82% occurring in the first six months.
  • Horizontal relapse significantly correlated with horizontal mandibular setback and vertical downward change (r=0.58, 0.67; p<0.001).
  • Vertical relapse correlated only with vertical downward change.

    • Impact:

    • Findings provide valuable insights into the stability of mandibular repositioning after bilateral sagittal split osteotomy.
    • Results can aid surgeons in patient counseling regarding expected outcomes and potential need for revision.
    • This study contributes to the understanding of factors influencing long-term stability in orthognathic surgery.