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J Oral Maxillofac Surg. 2018 Mar;76(3):616-630. doi: 10.1016/j.joms.2017.08.018. Epub 2017 Aug 17.

Effect of Piezoelectric Sutural Ostectomies on Accelerated Bone-Borne Sutural Expansion.

Author information

1
Doctoral Student, Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia; Lecturer, Department of Orthodontics, College of Dentistry, Karbala University, Karbala, Iraq.
2
Head and Senior Consultant, Department of Dentistry, Ng Teng Fong General Hospital, JurongHealth Services, Singapore; Adjunct Professor, Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
3
Associate Professor, Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
4
Professor, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
5
Associate Professor, Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia. Electronic address: zamrir@um.edu.my.

Abstract

PURPOSE:

The present study investigated the effect of piezoelectric sutural ostectomies on accelerated bone-borne sutural expansion.

MATERIALS AND METHODS:

Sixteen male New Zealand white rabbits (20 to 24 weeks old) were randomly divided into 4 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) before expander application with the rabbits 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 with a 2.5-mm initial expansion, followed by 0.5 mm/day for 7 days (groups 2 to 4). After 6 weeks of retention, the bone volume fraction, sutural separation, and new bone formation were evaluated using micro-computed tomography and histomorphometry. Statistical analysis was performed using Kruskal-Wallis and Mann-Whitney U tests and Spearman's rho correlation (P < .05).

RESULTS:

Ranking of the 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 in groups 1 (63.63%) and 3 (75.93%), respectively. Spearman's correlation showed a strong, positive, and significant correlation (r = 0.932; P < .01) between the new sutural bone formation and amount of sutural separation.

CONCLUSIONS:

Piezoelectric sutural ostectomies increased the rate of sutural separation and promoted new sutural bone formation/osteogenesis. Continuous ostectomy gave better results than discontinuous ostectomy.

PMID:
28893543
DOI:
10.1016/j.joms.2017.08.018

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