Oral and Maxillofacial Surgery

, Volume 13, Issue 3, pp 159–169 | Cite as

Evaluation of surgically assisted rapid maxillary expansion with or without pterygomaxillary disjunction based upon preoperative and post-expansion 3D computed tomography data

  • Katharina Laudemann
  • Oksana Petruchin
  • Martin G. Mack
  • Stefan Kopp
  • Robert Sader
  • Constantin A. Landes
Original Article

Abstract

Purpose, methods

This study (50 patients; Ø25 years) compared surgically assisted rapid maxillary expansion (SARME) with (±PP) to SARME without pterygomaxillary (−PP) disjunction due to dentoskeletal effects in 3D CT preoperatively and Ø11 weeks post-expansion.

Results

In t test, SARME−PP declined in transverse width from anterior to posterior but more symmetrically than SARME+PP. It produced more segmental inclination and vestibular bone resorption in the premolars. SARME+PP also declined in transverse width from anterior to posterior but more asymmetrically with an extreme convergence to the molars. It produced more segmental inclination and vestibular bone resorption (second molar) in the molars and a palatal bone plate thickness increase in the second premolar. With variance analysis, a further differentiation between the two independent groups due to secondary variables was made: SARME+PP produced the biggest decline in transverse width (patients <20 years) and the biggest segmental outward inclination from anterior to posterior in patients with bone-borne devices. SARME−PP in patients <20 years and SARME+PP in patients >20 years both produced the biggest lateral pterygoid bending.

Conclusion

Pterygomaxillary disjunction should be based on patient age and individual requirements, i.e., in patients <20 years (SARME−PP) and >20 years (SARME+PP).

Keywords

SARME Pterygomaxillary disjunction 3D CT Orthognathic surgery 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Katharina Laudemann
    • 1
    • 4
  • Oksana Petruchin
    • 1
  • Martin G. Mack
    • 2
  • Stefan Kopp
    • 3
  • Robert Sader
    • 1
  • Constantin A. Landes
    • 1
  1. 1.Oral, Maxillofacial and Plastic Facial SurgeryGoethe UniversityFrankfurtGermany
  2. 2.Department of Diagnostic and Interventional RadiologyGoethe UniversityFrankfurtGermany
  3. 3.Department of OrthodonticsGoethe UniversityFrankfurtGermany
  4. 4.Mund-, Kiefer- und Plastische GesichtschirurgieFrankfurt am MainGermany

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