Effect of piezoelectric sutural ostectomies on accelerated bone-borne sutural expansion

Publication date: Available online 17 August 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Akram S. Alyessary, Adrian U.J. Yap, Siti Adibah Othman, Mohammad T. Rahman, Zamri Radzi
PurposeThis study investigated the effect of piezoelectric sutural ostectomies on accelerated bone-borne sutural expansion.MethodsSixteen male New Zealand white rabbits (20-24 weeks old) were randomly divided into the following four experimental groups (n=4): group 1, conventional rapid sutural expansion; group 2, accelerated sutural expansion; group 3, accelerated sutural expansion with continuous ostectomy; and group 4, accelerated sutural expansion with discontinuous ostectomy. All sutural ostectomies were performed using a piezoelectric instrument (Woodpecker DTE, DS-II., Guangxi, China) prior to expander application under anesthesia. Modified hyrax expanders were placed across the midsagittal sutures of the rabbits and secured with miniscrew implants located bilaterally in the frontal bone. The hyrax expanders were activated 0.5 mm/day for 12 days (group 1) or 2.5 mm initial expansion followed by 0.5 mm/day for 7 days (groups 2 to 4). After 6 weeks of retention, bone volume fraction, sutural separation and new bone formation were evaluated using micro-computed tomography and histomorphometry. Statistical analysis was performed using Kruskal-Wallis / Mann-Whitney U tests and Spearman's rho correlation (p<0.05).ResultsRanking of median sutural separation was as follows: group 1 (3.05 mm), group 2 (3.97 mm), group 4 (4.78 mm) and group 3 (5.66 mm). The least and most bone formation were observed with groups 1 (63.63%) and 3 (75.93%), respectively. Spearman's correlation showed strong, positive and significant correlation (r= 0.932, p<0.01) between the new sutural bone formation and amount of sutural separation.ConclusionPiezoelectric sutural ostectomies increase the rate of sutural separation and promotes new sutural bone formation / osteogenesis. Continuous ostectomy gave better results than discontinuous ostectomy.



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