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Related Experiment Video

Updated: Jan 20, 2026

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Skeletal Stability Following LeFort I Maxillary Advancement With Rigid Fixation: A Retrospective Study.

Sunil Kumar Gulia1, Lalitha Singu2, Jhansi Rani3

  • 1Department of Oral and Maxillofacial Surgery, Shree Guru Gobind Singh Tricentenary University, Gurugram, IND.

Cureus
|January 19, 2026
PubMed
Summary
This summary is machine-generated.

Postoperative skeletal relapse after LeFort I maxillary advancement is common, but larger advancements (>5 mm) show better stability. Approximately 24% of advancement is lost in the first year, with excellent stability thereafter.

Keywords:
advancementlefort imaxillaryorthognathicosteotomyrelapse

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Area of Science:

  • Oral and Maxillofacial Surgery
  • Orthognathic Surgery
  • Craniofacial Reconstruction

Background:

  • Postoperative skeletal relapse is a frequent complication following LeFort I maxillary advancement.
  • Modern rigid fixation techniques aim to minimize relapse, but outcomes require continued evaluation.

Purpose of the Study:

  • To assess the magnitude and predictors of horizontal skeletal relapse one year after LeFort I maxillary advancement.
  • To evaluate the stability of rigid fixation techniques in orthognathic surgery.

Main Methods:

  • Retrospective analysis of 32 adult patients undergoing LeFort I advancement between 2018-2021.
  • Standardized rigid fixation using four miniplates; cephalometric analysis preoperatively, immediately postoperatively, and at one year.
  • Statistical analysis including t-tests and multivariate linear regression to identify relapse predictors.

Main Results:

  • Mean maxillary advancement was 5.52 mm, with a mean horizontal relapse of 1.33 mm (24.06%) at one year.
  • Advancements greater than 5 mm exhibited significantly lower percentage relapse (22.07%) compared to smaller advancements (26.06%).
  • Greater advancement magnitude was an independent negative predictor of percentage relapse (p=0.033).

Conclusions:

  • Four-point miniplate fixation offers reliable long-term skeletal stability after LeFort I maxillary advancement.
  • Larger maxillary advancements are more stable, suggesting that adequate surgical correction is preferable to conservative approaches.
  • Patients can expect approximately one-quarter relapse in the first year, followed by sustained stability.