Buccal Bone Changes Around First Permanent Molars and Second Primary Molars after Maxillary Expansion with a Low Compliance Ni–Ti Leaf Spring Expander

International Journal of Environmental Research and Public Health

卷:17

Davide Cavagnetto¹  Valentina Lanteri¹  Eleonora Mainardi¹  Cinzia Maspero¹  Francesca Gaffuri¹  Andrea Abate¹  Alessandro Ugolini² 

[1] Department of Biomedical, Surgical and Dental Sciences, School of Dentistry, University of Milan, 20100 Milan, Italy;

[2] Department of Sciences Integrated Surgical and Diagnostic, University of Genova, 16132 Genova, Italy;

关键词: maxillary expansion;    3D imaging;    CBCT;    Leaf springs expander;    bone thickness;   

DOI  :  10.3390/ijerph17239104

来源: DOAJ

【 摘 要 】

Background: Vestibular bone thickness changes and dento-alveolar buccal tipping of second primary molars and of first molars after maxillary expansion performed with a slow maxillary expansion protocol was investigated. Methods: Twenty patients (mean age 7.3 ± 0.9 years old; 9 male and 11 female) were treated according to the Leaf Expander protocol. Buccal alveolar bone thickness (BT), buccal alveolar bone height (BH), inter-dental angle (TIP), and inter-molar width (IW) regarding first molars and second primary molars were calculated before and after expansion on cone beam computed tomography (CBCT) images. Descriptive statistics and paired t-tests were used to assess changes between the pre-treatment and post-treatment measurements. Results: Bone thickness vestibular to second primary molars and intermolar width of both teeth were the only variables that showed statistically significant changes. Conclusions: It appears that buccal bone thickness vestibular to first molars was not significantly reduced after maxillary expansion with the Leaf Expander. The clinical use of a slow maxillary expander with Ni–Ti springs appears efficient and safe in in the correction of maxillary hypoplasia during mixed dentition.

【 授权许可】

Unknown