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Related Experiment Videos

Reproducibility of aimed-at profiles

R E Mooren1, H P Freihofer, W A Borstlap

  • 1Department of Oral and Maxillofacial Surgery, University Hospital Nijmegen, The Netherlands.

Journal of Cranio-Maxillo-Facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery
|May 1, 1998
PubMed
Summary

Maxillofacial surgeons showed significant variability in planning jaw correction profiles. Consistent use of a construction system is recommended for accurate surgical planning and improved patient outcomes.

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Area of Science:

  • Maxillofacial Surgery
  • Orthognathic Surgery
  • Facial Aesthetics

Background:

  • Accurate facial profile planning is crucial for successful orthognathic surgery.
  • Variability in surgical planning can lead to suboptimal aesthetic and functional outcomes.
  • Standardized methods for facial profile analysis are essential for consistent results.

Purpose of the Study:

  • To assess the reproducibility of facial profile planning among maxillofacial surgeons.
  • To evaluate the consistency of landmark identification and measurement in orthognathic surgery planning.
  • To compare surgeon-drawn profiles with established facial aesthetic guidelines.

Main Methods:

  • Seven maxillofacial surgeons repeatedly drew 10 specific facial profile lines over a 6-month period.

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  • Absolute and proportional vertical measurements from the drawings were analyzed for variations.
  • Surgeon drawings were compared against established facial anthropometric ratios (Farkas and Munro) and aesthetic proportions (Brons and Mulié).

    • Main Results:

    • Significant variations were observed in individual measurements between the two drawing sessions.
    • Mean differences per measurement varied between surgeons, ranging from 0% to 10%.
    • Group profile drawings aligned with Farkas and Munro ratios but diverged from Brons and Mulié 'golden dimensions'.

    Conclusions:

    • Surgeon drawings for facial profile planning exhibit considerable variability.
    • A standardized construction system is advisable for planning osteotomies to enhance consistency.
    • Reliance on subjective 'off the cuff' profile drawing may compromise surgical accuracy.