| Effects of semirapid maxillary expansion on conductive hearing loss. | |
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MedLine Citation:
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PMID: 18538248 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: Conductive hearing loss is affected by physical changes imposed on the mechanical system of the outer or middle ear. Maxillary expansion can affect conductive hearing loss, and the changes have been investigated with pure-tone audiograms. Semirapid and slow methods of maxillary expansion have some advantages over rapid maxillary expansion, but the effects on conductive hearing loss have not been investigated. The purpose of this study was to investigate long-term effects of semirapid maxillary expansion (SRME) with an acrylic bonded appliance on conductive hearing loss by using audiometric and tympanometric records. METHODS: The effects of SRME with a bonded appliance were studied in 19 growing subjects who had narrow maxillary arches and conductive hearing loss. Hearing levels were determined with pure-tone audiometric and tympanometric records. Four records were taken from each subject. The first records were taken before SRME, the second after maxillary expansion (mean, 3.4 months later), the third after retention (mean, 6 months later), and the fourth after fixed-appliance treatment (approximately 2 years later). The data were analyzed with ANOVA. The least-significant difference test was also used to determine when the changes in the measurements were significant. RESULTS: Hearing improved and air-bone gaps decreased at a statistically significant level after active expansion, and these changes remained relatively stable during the last 2 periods. Middle-ear volume increased at a statistically significant level after maxillary expansion and continued to increase until the end of treatment. No significant change was observed in the static compliance value. CONCLUSIONS: SRME treatment has a positive and statistically significant effect on both hearing and normal functioning of the eustachian tubes in patients with transverse maxillary deficiency and conductive hearing loss. |
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Authors:
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Nichat Kilic; Hüsamettin Oktay; Erol Selimoğlu; Abdulvahit Erdem |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics Volume: 133 ISSN: 1097-6752 ISO Abbreviation: Am J Orthod Dentofacial Orthop Publication Date: 2008 Jun |
Date Detail:
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Created Date: 2008-06-09 Completed Date: 2008-06-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8610224 Medline TA: Am J Orthod Dentofacial Orthop Country: United States |
Other Details:
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Languages: eng Pagination: 846-51 Citation Subset: D; IM |
Affiliation:
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Department of Orthodontics, Faculty of Dentistry, Atatürk University, Erzurum, Turkey. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Impedance Tests Adolescent Analysis of Variance Audiometry, Pure-Tone Child Ear, Middle / anatomy & histology Eustachian Tube / physiology Female Hearing Loss, Conductive / complications, therapy* Humans Male Malocclusion / complications, therapy Orthodontic Appliances Palatal Expansion Technique* / instrumentation |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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