Evaluation of opening pattern and bone neoformation at median palatal suture area in patients submitted to surgically assisted rapid maxillary expansion (SARME) through cone beam computed tomography

• Published in: Journal of applied oral science Vol. 23; no. 4; pp. 397 - 404
• Main Authors: Salgueiro, Daniel Gomes, Rodrigues, Vitor Hugo Leite de Oliveira, Tieghi Neto, Victor, Menezes, Carolina Carmo de, Gonçales, Eduardo Sanches, Ferreira Júnior, Osny
• Format: Journal Article
• Language: English
• Published: Brazil Faculdade de Odontologia de Bauru da Universidade de São Paulo 01-07-2015; Faculdade De Odontologia De Bauru - USP; University of São Paulo
• Subjects: Activator Appliances; Adult; Age Factors; Analysis of Variance; Bone Density; Bone Regeneration - physiology; Cephalometry; Cone beam computed tomography; Cone-Beam Computed Tomography - methods; Dentistry; DENTISTRY, ORAL SURGERY & MEDICINE; Female; Humans; Male; Orginal; Osteotomy, Le Fort; Palatal Expansion Technique - instrumentation; Palate, Hard - diagnostic imaging; Palate, Hard - surgery; Postoperative Period; Preoperative Period; Prospective Studies; Reference Values; Surgically assisted rapid maxillary expansion; Suture Techniques; Time Factors; Transverse maxillary deficiency; Young Adult; Transverse maxillary deficiency; Surgically assisted rapid maxillary expansion; Cone beam computed tomography
• ISSN: 1678-7757; 1678-7765; 1678-7765; 1678-7757
• DOI: 10.1590/1678-775720140486

Surgically assisted rapid maxillary expansion (SARME) is the treatment of choice to adult patients even with severe transversal maxillary discrepancies. However, the adequate retention period to achieve the bone remodeling, thus assuring treatment stability, is controversial.Objective To evaluate the opening pattern and bone neoformation process at the midpalatal suture in patients submitted to surgically assisted (SARME) through cone beam computed tomography (CBCT).Material and Methods Fourteen patients were submitted to SARME through subtotal Le Fort I osteotomy. Both the opening pattern and the mean bone density at midpalatal suture area to evaluate bone formation were assessed pre- and post-operatively (15, 60 and 180 days) through CBCT.Results Type I opening pattern (from anterior to posterior nasal spine) occurred in 12 subjects while type II opening pattern (from anterior nasal spine to transverse palatine suture) occurred in 2 individuals. The 180-day postoperative mean (PO 180) of bone density value was 49.9% of the preoperative mean (Pre) value.Conclusions The opening pattern of midpalatal suture is more related to patients' age (23.9 years in type I and 33.5 years in type II) and surgical technique. It was not possible to observe complete bone formation at midpalatal suture area at the ending of the retention period studied (180 days).