title: [First experiences in maxillary arch expansion using the MWD (Maxillary Widening Device)].
abstract: OBJECTIVE
  Conventional devices for surgical assisted rapid palatinal expansion are either tooth or bone borne. During clinical application over years, system dependant deficiencies, using either device became apparent. So together with Normed, Tuttlingen, we developed a new bone borne distractor (MWD, Maxillary Widening Device). In this article we introduce this distractor and present our first experiences in using this device.
  
  
  METHODS
  In this study, 20 patients suffering from maxillary arch compression with anterior crowding were treated using MWD in combination with Glassman's modified Le-Fort-I-osteotomy. Additionally the MWD was inserted in two cleft lip and palate patients, as well as one patient with bilateral microsomy.
  
  
  RESULTS
  The MWD turned out to be a safe, easy to handle and reliable bone borne distractor leading to excellent results. The MWD can be used in early adult as well as in syndromal patients. In early adult patients the complication rate averaged 25%, widening averaged 7,6mm. Relaps was not discovered.
  
  
  CONCLUSIONS
  The MWD turned out to be a reliable, stable and user-friendly device leading to excellent results.
authors.affiliation: Klinik für Mund-, Kiefer- und Plastische Gesichtschirurgie, Klinikum der Johann-Wolfgang-Goethe Universität, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany. oliver.seitz@kgu.de
authors.forename: Oliver
authors.initials: O
authors.lastname: Seitz
authors.forename: Constantin
authors.initials: C
authors.lastname: Landes
authors.forename: Jan-Philipp
authors.initials: JP
authors.lastname: Dissmann
authors.forename: Robert
authors.initials: R
authors.lastname: Sader
authors.forename: Cornelius
authors.initials: C
authors.lastname: Klein
mesh_terms: D000293:Adolescent; D000328:Adult; D002971:Cleft Lip / Q000000981:diagnostic imaging / Q000601:surgery*; D002972:Cleft Palate / Q000000981:diagnostic imaging / Q000601:surgery*; D003131:Combined Modality Therapy; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000000981:diagnostic imaging / Q000601:surgery*; D019340:Osteotomy, Le Fort; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D011859:Radiography