Journal of Oral and Maxillofacial Surgery
Volume 66, Issue 6 , Pages 1099-1103, June 2008

Accuracy of Predicting the Pharyngeal Airway Space on the Cephalogram After Mandibular Setback Surgery

  • Toshitaka Muto, PhD

      Affiliations

    • Professor, Department of Oral & Maxillofacial Surgery, National Defense Medical College, Saitama, Japan.
    • Corresponding Author InformationAddress correspondence and reprint requests to Dr Muto: Department of Oral & Maxillofacial Surgery, National Defense Medical College, Tokorozawa, Saitama, 359-8513 Japan
    • ,
  • Atsue Yamazaki, PhD

      Affiliations

    • Assistant Professor, Department of Orthodontics, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan.
    • ,
  • Shigehiro Takeda, PhD

      Affiliations

    • Assistant Professor, Department of Orthodontics, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan.
    • ,
  • Yasunori Sato, PhD

      Affiliations

    • Chief Professor, Department of Oral & Maxillofacial Surgery, National Defense Medical College, Saitama, Japan.

Purpose

The aim of the present study was to evaluate the accuracy of a formula predicting the change of pharyngeal airway space (PAS) on the cephalogram after mandibular setback surgery.

Patients and Methods

Twenty-nine female adults with mandibular prognathism underwent surgery by bilateral sagittal split ramus osteotomy. The postoperative anteroposterior (A-P) PAS dimension was calculated from the change of C3-Me (distance between the anteroinferior point of the third cervical vertebra and menton) using 2 cephalograms taken before treatment and at 1 year after surgery. The regression equation used was y = −21.105 + 0.402x (y: PAS; x: C3-Me; r = 0.854).

Results

The predicted and measured values were nearly same on average, and the difference between both ranged within ±1.5 mm for each case individually.

Conclusion

This study suggested that the postoperative A-P PAS dimension can be predicted from the change in C3-Me, matching the amount of the mandibular setback.

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PII: S0278-2391(08)00053-0

doi:10.1016/j.joms.2008.01.003

Journal of Oral and Maxillofacial Surgery
Volume 66, Issue 6 , Pages 1099-1103, June 2008

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