Adjunctive buccal and palatal corticotomy for adult maxillary expansion in an animal model
Le My Huy Thuc, Lau Seng Fong, Ibrahim Norliza, Hayaty Abu Kasim Noor, Radzi Zamri Bin,
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( Le My Huy Thuc ) - University of Malaya Faculty of Dentistry Department of Paediatric Dentistry and Orthodontics
( Lau Seng Fong ) - Universiti Putra Malaysia Faculty of Veterinary Medicine Department of Veterinary Clinical Studies
( Ibrahim Norliza ) - University of Malaya Faculty of Dentistry Department of Diagnostic and Intergrated Dental Practice
( Hayaty Abu Kasim Noor ) - University of Malaya Faculty of Dentistry Department of Restorative Dentistry
( Radzi Zamri Bin ) - University of Malaya Faculty of Dentistry Department of Paediatric Dentistry and Orthodontics
Abstract
Objective: This study aimed to explore the usefulness of adjunctive buccal and palatal corticotomy for adult maxillary expansion in an animal model using cone-beam computed tomography (CBCT).
Methods: Twelve adult sheep were randomly divided into two groups (each n = 6): a control group, where no treatment was administered, and a treatment group, where buccal and palatal corticotomy-assisted maxillary expansion was performed. CBCT scans were taken before (T1) and after (T2) treatment. Differences in all transverse dental and alveolar dimensions, alveolar width at crest level, hard palate level, horizontal bone loss, interdental cusp width and inter-root apex were assessed using Wilcoxon signed-rank and Mann?Whitney U-tests. Kruskal?Wallis tests and pairwise comparisons were used to detect the significance of differences among the inter-premolar and inter-molar widths.
Results: CBCT data revealed significant changes in all transverse dental and alveolar dimensions. The mean interpremolar alveolar width showed an increase of 2.29 to 3.62 mm at the hard palate level, 3.89 to 4.38 mm at the alveolar crest level, and 9.17 to 10.42 mm at the buccal cusp level. Dental changes in the vertical dimension were not significant.
Conclusions: Our findings based on an adult animal model suggest that adjunctive buccal and palatal corticotomy can allow for both skeletal and dental expansion, with the amount of dental expansion exceeding that of skeletal expansion at alveolar crest and hard palate levels by two and three folds, respectively. Therefore, this treatment modality is potential to enhance the outcomes of maxillary expansion in adults.
키워드
Buccal corticotomy; Palatal corticotomy; Maxillary expansion; Cone-beam computed tomography; Sheep model
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