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Three-segment versus 2-segment surgically assisted rapid maxillary expansion.

Pedro Andre A Pereira1, João Vitor Canellas2, Ramiro Beato Souza2

  • 1Master's student, Department of Oral and Maxillofacial Surgery, Rio de Janeiro State University, Rio De Janeiro, Brazil.

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
|September 14, 2021
PubMed
Summary
This summary is machine-generated.

The 3-segment surgically assisted rapid maxillary expansion (SARME) technique offers superior bone expansion and patient cosmetic outcomes compared to the conventional 2-segment approach. This method also showed reduced molar inclination, though it involved a longer surgical time.

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Area of Science:

  • Orthodontics
  • Maxillofacial Surgery
  • Dental Imaging

Background:

  • Maxillary hypoplasia often requires surgical intervention for correction.
  • Surgically assisted rapid maxillary expansion (SARME) is a common procedure to widen the maxilla.
  • Comparing different osteotomy techniques in SARME is crucial for optimizing outcomes.

Purpose of the Study:

  • To compare the efficacy of conventional 2-segment versus 3-segment osteotomy in SARME.
  • To evaluate bone expansion, molar inclination, patient perception, and surgical time between the two techniques.

Main Methods:

  • A pilot study involving 19 patients undergoing SARME.
  • Patients were divided into 2-segment (10) and 3-segment (9) osteotomy groups.
  • Analysis included pre- and post-operative cone beam computed tomography (CBCT) scans, periodontal probing, visual analog scale (VAS) for cosmetic perception, and surgical time measurement.

Main Results:

  • The 3-segment technique yielded greater maxillary bone expansion (6.20 mm vs 5.12 mm) and less molar inclination (3.57° vs 7.16°).
  • Patients reported significantly better cosmetic perception with the 3-segment technique (VAS 7.68 vs 3.13).
  • The 3-segment group experienced longer surgical times (52 min vs 43 min), and one patient in the 2-segment group had central incisor necrosis.

Conclusions:

  • The 3-segment SARME technique appears more effective for achieving maxillary bone expansion.
  • Improved aesthetics and reduced complications suggest advantages for the 3-segment approach.
  • Further research may validate these findings in larger cohorts.