Korean J Orthod.  2018 Mar;48(2):98-106. 10.4041/kjod.2018.48.2.98.

Adjunctive buccal and palatal corticotomy for adult maxillary expansion in an animal model

Affiliations
  • 1Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia. zamrir@um.edu.my
  • 2Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Selangor, Malaysia.
  • 3Department of Diagnostic and Intergrated Dental Practice, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
  • 4Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.

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.

Keyword

Buccal corticotomy; Palatal corticotomy; Maxillary expansion; Cone-beam computed tomography; Sheep model

MeSH Terms

Adult*
Animals*
Cone-Beam Computed Tomography
Humans
Models, Animal*
Palatal Expansion Technique*
Palate, Hard
Sheep
Vertical Dimension
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