title: [Surgically assisted rapid maxillary expansion. An evaluation of different surgical techniques and their effect on maxillary dentoskeletal complex based on cone-beam computed tomography. Preliminary report].
abstract: OBJECTIVE
  To evaluate and compare the dentoskeletal effects associated with surgically assisted rapid maxillary expansion (SARME) performed with (+) and without (-) pterygomaxillary disjunction (PD), utilizing cone beam computed tomography (CBCT).
  
  
  METHODS
  A retrospective study of 9 patients (1 male, 8 females, mean age 18.9 years) undergoing SARME who were divided into two groups. In group (-PD) the surgical technique followed involved bilateral LeFort I type of osteotomy plus midline osteotomy. In group (+PD) same protocol was followed and pterygoid disjunction was performed additionally. Three-dimensional CBCT scans were obtained preoperatively and 3-6 month postretention. A Hyrax type acrylic bonded expander was used. MIMICS 14.0 (Materialise Europe, Belgium) software was used to evaluate transverse expansion at skeletal, dentoalveolar and dental level. Additionally dental inclinations, alveolar bending and the pattern of expansion sagittally were assessed. Wilcoxon's and Mann Whitney U tests were used for comparisons.
  
  
  CONCLUSIONS
  All linear transverse measurements at dental and dentoalveolar level were found to have a statistically significant increase (P < 0.05) in both treatment groups. No statistically significant differences were found between the two groups as well as within groups on skeletal level (except of the anterior expansion of maxilla between piriform rims bilaterally). In -PD group significant buccal tipping of the 1(st) premolar was observed as well as increased buccal bending of the alveolar crest.
  
  
  CONCLUSIONS
  This study confirms that SARME is an effective treatment of maxillary transverse deficiency. CBCT is an adequate tool to assess dentoskeletal treatment effects.
authors.affiliation: Private practice, Zakynthos, Greece.
authors.forename: Antonios
authors.initials: A
authors.lastname: Sygouros
authors.affiliation: Département d'Orthodontie, Université de Marmara. Üniversitesi Nişantacsı Kampusu, Büyük Çiftlik Sk. No : 6 Ortodonti Kat 3, 34365 Nişantaşı, Şişli, Istanbul, Turquie.
authors.forename: Melih
authors.initials: M
authors.lastname: Motro
authors.affiliation: Département de Chirurgie Orale et Maxillo-faciale, Université de Marmara. Üniversitesi Nişantaşı Kampusu, Büyük Çiftlik Sk. No : 6 Ortodonti Kat 3, 34365 Nişantaşı, Şişli, Istanbul, Turquie.
authors.forename: Faysal
authors.initials: F
authors.lastname: Ugurlu
authors.affiliation: Département d'Orthodontie, Université de Marmara. Üniversitesi Nişantacsı Kampusu, Büyük Çiftlik Sk. No : 6 Ortodonti Kat 3, 34365 Nişantaşı, Şişli, Istanbul, Turquie.
authors.forename: Ahu
authors.initials: A
authors.lastname: Acar
mesh_terms: D000293:Adolescent; D000539:Alveolar Process / Q000000981:diagnostic imaging; D002508:Cephalometry / Q000379:methods; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003724:Dental Arch / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery*; D063166:Maxillary Osteotomy / Q000379:methods; D009296:Nasal Cavity / Q000000981:diagnostic imaging; D016382:Orthodontic Appliance Design; D019340:Osteotomy, Le Fort / Q000379:methods; D010155:Palatal Expansion Technique / Q000295:instrumentation; D056739:Pterygopalatine Fossa / Q000601:surgery; D012189:Retrospective Studies; D014070:Tooth / Q000000981:diagnostic imaging; D055815:Young Adult