Upper and lower arch changes after Mixed Palatal Expansion protocol.

拱门 医学 牙弓 海拉克斯 牙科 反牙合 口腔正畸科 错牙合 土木工程 工程类
作者
Vincenzo Grassia,Fabrizia d’Apuzzo,Dario Di Stasio,Abdolreza Jamilian,Alberta Lucchese,Letizia Perillo
出处
期刊:PubMed [National Institutes of Health]
卷期号:15 (4): 375-80 被引量:31
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摘要

The aim of this study was to evaluate upper and lower dental changes after Mixed Palatal Expansion (MPE) treatment in growing patients with posterior single or bilateral crossbite and mild-to-moderate crowding, as compared to untreated growing subjects by dental cast analysis.A group of 24 patients (18 girls, 6 boys) was treated with Hyrax-type device and compared with an untreated matched control group at T0 (8.6 yrs. ± 2) and at T1 (10 yrs. ± 2) using dental casts. The dental cast analysis was performed on four dental bilateral landmarks, on upper and lower casts; also upper and lower arch depths were measured. The groups were compared using independent sample t-test to estimate dental changes in upper and lower arches.The MPE group showed significant upper and lower arch changes when compared with the control group. Upper intermolar, interpremolar-2nd, interpremolar-1st (P<0.001) and intercanine widths (P<0.05) showed considerable changes in the treated group, while mandibular intermolar (P<0.001), interpremolar-1st (P<0.05) and intercanine widths (P<0.01) were slightly greater in the MPE group when compared with the control group.The changes in transverse upper and lower arch dimensions were significant, when compared with those seen in the control group.

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