Secondary fractures of Le Fort I osteotomy

Matthew W. Wilson, Pramod Maheshwari, Kathy Stokes, Michael J. Wheatley, Sean McLoughlin, Michael Talbot, W. T. Shults, Roger Dailey, John L. Wobig

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Purpose: To report the ophthalmic complications of Le Fort I osteotomy for the correction of dentofacial deformities and to determine the maximal compressive loads applied during pterygomaxillary separation in a cadaver model. Methods: Two cases of ophthalmic complications arising after Le Fort I osteotomy are reported. Le Fort I osteotomy was performed on five cadavers. The maximal compressive load applied during pterygomaxillary separation was recorded with a 10 kN (3,000 lbf) load cell of a MTS Mini-Bionix servohydraulic machine (MTS, Eden Prairie, MN, U.S.A.). A paired t test was used to compare forces applied to the right and left sides. Computed tomography scans of each specimen were obtained after Le Fort I osteotomy to document secondary fractures. The skulls were subsequently stained with 1% fuschin red to highlight secondary fractures. Results: Maximum compressive loads during pterygomaxillary separation ranged from 22 N (5.0 lbf) to 162 N (36.5 lbf), with an average of 106 N (23.8 lbf) (SD 47.6 N [10.7 lbf]). Forces applied on the first operative side were significantly greater than forces applied on the second operative side (p = 0.0034). Secondary fractures were found in three specimens by computed tomography and in two specimens by 1% fuschin red. All secondary fractures occurred on the second operative side. Conclusion: Secondary fractures in the Le Fort I osteotomy procedures occurred on the side opposite the greater maximal compressive load and on the second operative side.

Original languageEnglish (US)
Pages (from-to)258-270
Number of pages13
JournalOphthalmic Plastic and Reconstructive Surgery
Volume16
Issue number4
StatePublished - 2000

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Le Fort Osteotomy
Cadaver
Dentofacial Deformities
Tomography
Skull

ASJC Scopus subject areas

  • Ophthalmology
  • Surgery

Cite this

Wilson, M. W., Maheshwari, P., Stokes, K., Wheatley, M. J., McLoughlin, S., Talbot, M., ... Wobig, J. L. (2000). Secondary fractures of Le Fort I osteotomy. Ophthalmic Plastic and Reconstructive Surgery, 16(4), 258-270.

Secondary fractures of Le Fort I osteotomy. / Wilson, Matthew W.; Maheshwari, Pramod; Stokes, Kathy; Wheatley, Michael J.; McLoughlin, Sean; Talbot, Michael; Shults, W. T.; Dailey, Roger; Wobig, John L.

In: Ophthalmic Plastic and Reconstructive Surgery, Vol. 16, No. 4, 2000, p. 258-270.

Research output: Contribution to journalArticle

Wilson, MW, Maheshwari, P, Stokes, K, Wheatley, MJ, McLoughlin, S, Talbot, M, Shults, WT, Dailey, R & Wobig, JL 2000, 'Secondary fractures of Le Fort I osteotomy', Ophthalmic Plastic and Reconstructive Surgery, vol. 16, no. 4, pp. 258-270.
Wilson MW, Maheshwari P, Stokes K, Wheatley MJ, McLoughlin S, Talbot M et al. Secondary fractures of Le Fort I osteotomy. Ophthalmic Plastic and Reconstructive Surgery. 2000;16(4):258-270.
Wilson, Matthew W. ; Maheshwari, Pramod ; Stokes, Kathy ; Wheatley, Michael J. ; McLoughlin, Sean ; Talbot, Michael ; Shults, W. T. ; Dailey, Roger ; Wobig, John L. / Secondary fractures of Le Fort I osteotomy. In: Ophthalmic Plastic and Reconstructive Surgery. 2000 ; Vol. 16, No. 4. pp. 258-270.
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abstract = "Purpose: To report the ophthalmic complications of Le Fort I osteotomy for the correction of dentofacial deformities and to determine the maximal compressive loads applied during pterygomaxillary separation in a cadaver model. Methods: Two cases of ophthalmic complications arising after Le Fort I osteotomy are reported. Le Fort I osteotomy was performed on five cadavers. The maximal compressive load applied during pterygomaxillary separation was recorded with a 10 kN (3,000 lbf) load cell of a MTS Mini-Bionix servohydraulic machine (MTS, Eden Prairie, MN, U.S.A.). A paired t test was used to compare forces applied to the right and left sides. Computed tomography scans of each specimen were obtained after Le Fort I osteotomy to document secondary fractures. The skulls were subsequently stained with 1{\%} fuschin red to highlight secondary fractures. Results: Maximum compressive loads during pterygomaxillary separation ranged from 22 N (5.0 lbf) to 162 N (36.5 lbf), with an average of 106 N (23.8 lbf) (SD 47.6 N [10.7 lbf]). Forces applied on the first operative side were significantly greater than forces applied on the second operative side (p = 0.0034). Secondary fractures were found in three specimens by computed tomography and in two specimens by 1{\%} fuschin red. All secondary fractures occurred on the second operative side. Conclusion: Secondary fractures in the Le Fort I osteotomy procedures occurred on the side opposite the greater maximal compressive load and on the second operative side.",
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