Alveolar restoration following rapid maxillary expansion with and without corticotomy: A microcomputed tomography study in sheep.

Autor:	Le MHT; Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia., Noor Hayaty AK; Department of Restorative Dentistry, Wellness Research Cluster, University of Malaya, Kuala Lumpur, Malaysia., Zaini ZM; Department of Oro-maxillofacial Surgical and Medical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia., Dom SM; Department of Medical Imaging, Faculty of Health Sciences, Universiti Teknologi MARA (UiTM), Selangor, Malaysia., Ibrahim N; Department of Oro-maxillofacial Surgical and Medical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia., Radzi ZB; Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
Jazyk:	angličtina
Zdroj:	Korean journal of orthodontics [Korean J Orthod] 2019 Jul; Vol. 49 (4), pp. 235-245. Date of Electronic Publication: 2019 Jul 22.
DOI:	10.4041/kjod.2019.49.4.235
Abstrakt:	Objective: This study examined bone microstructure restoration after rapid maxillary expansion (RME) with and without corticotomy over multiple retention periods. Methods: Eighteen male Dorper sheep were randomly distributed into three groups (n = 6 each group): group 1, RME with corticotomy on the buccal and palatal sides; group 2, conventional RME treatment; and group 3, no treatment. Post-RME, trabecular bone microstructure and new bone formation were evaluated by using microcomputed tomography (microCT) and histomorphometry after a 4- or 12-week retention period. Intergroup differences in bone quality and bone remodeling were analyzed by using two-way analysis of variance with Bonferroni post-hoc test. Results: The bone volume fraction (bone volume [BV]/total volume [TV]) values relative to the control in groups 1 and 2 were 54.40% to 69.88% after the 4-week retention period and returned to approximately 80% after the 12-week retention period. The pooled BV/TV values of the banded teeth in groups 1 and 2 were significantly lower than those of the control after the 4-week retention period ( p < 0.05). However, after the 12-week retention period, the pooled BV/TV values in group 2 were significantly lower than those in groups 1 and 3 ( p < 0.05). Histomorphological analysis showed that the new bone formation area in group 1 was approximately two to three times of those in group 2 and control. Conclusions: Corticotomy significantly enhanced the restoration of bone quality after the retention periods for banded teeth. This benefit might result from the increased new bone formation after corticotomy. Competing Interests: CONFLICTS OF INTEREST: No potential conflict of interest relevant to this article was reported.
Databáze:	MEDLINE
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