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Stability of transverse expansion in the mandibular arch.
Am J Orthod Dentofacial Orthop 2003; 124(3):288-93AJ

Abstract

This was a retrospective, longitudinal cephalometric and cast study of 29 white patients at pretreatment, posttreatment, and an average of 6 years 3 months postretention. The goal was to assess changes with treatment and retention with the expanding mandibular lingual arch appliance in conjunction with fixed edgewise treatment. Seven mandibular cast measurements were assessed, including arch crowding, arch perimeter, arch length, and arch width at the permanent canines, first premolars, second premolars, and first molars. Cephalometric radiographs were digitized, and 16 cephalometric measurements were made. Repeated-measures analysis of variance and 2-sample t tests were used to determine statistically significant changes. It was found that the expanding lingual arch used for less than 6 months with the mandibular fixed edgewise appliance caused an increase in both the transverse and sagittal dimensions of the mandibular dental arch. Transverse expansion was more stable in the posterior region of the mandibular dental arch than in the anterior region. Mandibular intercanine width increase could be maintained only by fixed retention. Although the maxillary and mandibular incisors were advanced and proclined, lip protrusion did not occur.

Authors+Show Affiliations

Department of Orthodontics, University of Oklahoma College of Dentistry, 1001 Stanton L. Young Boulevard, Oklahoma City, OK 73190, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12970662

Citation

Housley, Jeffrey A., et al. "Stability of Transverse Expansion in the Mandibular Arch." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 124, no. 3, 2003, pp. 288-93.
Housley JA, Nanda RS, Currier GF, et al. Stability of transverse expansion in the mandibular arch. Am J Orthod Dentofacial Orthop. 2003;124(3):288-93.
Housley, J. A., Nanda, R. S., Currier, G. F., & McCune, D. E. (2003). Stability of transverse expansion in the mandibular arch. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 124(3), pp. 288-93.
Housley JA, et al. Stability of Transverse Expansion in the Mandibular Arch. Am J Orthod Dentofacial Orthop. 2003;124(3):288-93. PubMed PMID: 12970662.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Stability of transverse expansion in the mandibular arch. AU - Housley,Jeffrey A, AU - Nanda,Ram S, AU - Currier,G Fräns, AU - McCune,Dale E, PY - 2003/9/13/pubmed PY - 2003/10/10/medline PY - 2003/9/13/entrez SP - 288 EP - 93 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 124 IS - 3 N2 - This was a retrospective, longitudinal cephalometric and cast study of 29 white patients at pretreatment, posttreatment, and an average of 6 years 3 months postretention. The goal was to assess changes with treatment and retention with the expanding mandibular lingual arch appliance in conjunction with fixed edgewise treatment. Seven mandibular cast measurements were assessed, including arch crowding, arch perimeter, arch length, and arch width at the permanent canines, first premolars, second premolars, and first molars. Cephalometric radiographs were digitized, and 16 cephalometric measurements were made. Repeated-measures analysis of variance and 2-sample t tests were used to determine statistically significant changes. It was found that the expanding lingual arch used for less than 6 months with the mandibular fixed edgewise appliance caused an increase in both the transverse and sagittal dimensions of the mandibular dental arch. Transverse expansion was more stable in the posterior region of the mandibular dental arch than in the anterior region. Mandibular intercanine width increase could be maintained only by fixed retention. Although the maxillary and mandibular incisors were advanced and proclined, lip protrusion did not occur. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/12970662/Stability_of_transverse_expansion_in_the_mandibular_arch_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889540603004505 DB - PRIME DP - Unbound Medicine ER -