Evaluation of craniofacial effects during rapid maxillary expansion through combined in vivo/in vitro and finite element studies

Provatidis, CG; Georgiopoulos, B; Kotinas, A; McDonald, JP

dc.contributor.author	Provatidis, CG	en
dc.contributor.author	Georgiopoulos, B	en
dc.contributor.author	Kotinas, A	en
dc.contributor.author	McDonald, JP	en
dc.date.accessioned	2014-03-01T01:28:17Z
dc.date.available	2014-03-01T01:28:17Z
dc.date.issued	2008	en
dc.identifier.issn	0141-5387	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18803
dc.subject	Finite Element	en
dc.subject	Rapid Maxillary Expansion	en
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.other	adolescent	en
dc.subject.other	article	en
dc.subject.other	cadaver	en
dc.subject.other	cephalometry	en
dc.subject.other	child	en
dc.subject.other	computer simulation	en
dc.subject.other	cranial suture	en
dc.subject.other	dental care	en
dc.subject.other	facial bone	en
dc.subject.other	finite element analysis	en
dc.subject.other	histology	en
dc.subject.other	human	en
dc.subject.other	methodology	en
dc.subject.other	nose cavity	en
dc.subject.other	orthodontics	en
dc.subject.other	physiology	en
dc.subject.other	skull base	en
dc.subject.other	Adolescent	en
dc.subject.other	Cadaver	en
dc.subject.other	Cephalometry	en
dc.subject.other	Child	en
dc.subject.other	Computer Simulation	en
dc.subject.other	Cranial Sutures	en
dc.subject.other	Dental Stress Analysis	en
dc.subject.other	Facial Bones	en
dc.subject.other	Finite Element Analysis	en
dc.subject.other	Humans	en
dc.subject.other	Nasal Cavity	en
dc.subject.other	Palatal Expansion Technique	en
dc.subject.other	Skull Base	en
dc.title	Evaluation of craniofacial effects during rapid maxillary expansion through combined in vivo/in vitro and finite element studies	en
heal.type	journalArticle	en
heal.identifier.primary	10.1093/ejo/cjn046	en
heal.identifier.secondary	http://dx.doi.org/10.1093/ejo/cjn046	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	It is well documented in the literature that a contracted maxilla is commonly associated with nasal obstruction. Midpalatal splitting using the rapid maxillary expansion (RME) technique produces separation of the maxillary halves with consequent widening of the nasal cavity. Although clinicians agree about many of the indications for and outcomes of RME, some disagreements persist in relation to the biomechanical effects induced. The present research was based on the parametric analysis of a finite element model (FEM) of a dry human skull with the RME appliance cemented in place in order to evaluate these effects on the overall craniofacial complex with different suture ossification. The behaviour of the FEM was compared with the findings of a clinical study and to an in vitro experiment of the same dry skull. Comparisons refer to the opening pattern and associated displacements of four anatomical points located at the left and right maxilla (MI, UM, EM, CN).It was found that the maxillolacrymal, the frontomaxillary, the nasomaxillary, the transverse midpalatal sutures, and the suture between the maxilla and pterygoid process of the sphenoid bone did not influence the outcome of RME, while the zygomatico-maxillary suture influenced the response of the craniofacial complex to the expansion forces. Moreover, the sagittal suture at the level of the frontal part of the midpalatal suture plays an important role in the degree and manner of maxillary separation.Maximum displacements were observed in the area of maxilla below the hard palate, from the central incisors to second premolars, which dissipated at the frontal and parietal bone and nullified at the occipital bone. © The Author 2008. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved.	en
heal.publisher	OXFORD UNIV PRESS	en
heal.journalName	European Journal of Orthodontics	en
dc.identifier.doi	10.1093/ejo/cjn046	en
dc.identifier.isi	ISI:000260151600002	en
dc.identifier.volume	30	en
dc.identifier.issue	5	en
dc.identifier.spage	437	en
dc.identifier.epage	448	en