Research Article
Volume 19 Issue 4 - 2020
Quantitative Evaluation of Consecutively Rapid Maxillary Expansions and Constrictions Effects on Circum-Maxillary Sutures in Boys by SPECT Bone Scintigraphy
Hatice Gökalp*
Professor, Department of Orthodontics, Beşevler, School of Dentistry, University of Ankara, Ankara, Turkey
*Corresponding Author: Hatice Gökalp, Professor, Department of Orthodontics, Beşevler, School of Dentistry, University of Ankara, Ankara, Turkey.
Received: January 10, 2020; Published: March 14, 2020




Abstract

Objective: The aim of the study was to ascertain bone activity changes at biomechanically induced circum-maxillary sutures by Consecutively Rapid Maxillary Expansions and Constrictions (CRME-C). 

Materials and Methods: A banded type maxillary expansion device with Double Hinged Expansion Screw was used for CRME-C in 9 growing male patients having 11.29 ± 0.76 chronologic age (range from 9.8 to 13.6 years) and skeletal Class III malocclusion with transvers maxillary deficiency. Screw was 4 times a day as twice at the morning and twice in the evening. CRME-C started by opened the screw in first week and closed it next week was applied during consecutively 9 weeks. After under-jet was reduced and/or maxillary constriction was eliminated, the screw was fixed, and the device was kept in mouth for retention for six months. Single photon emission computed tomography bone scintigraphy records were obtained before (T1) and at the end of CRME-C (T2) and six months after the retention period (T3). Nonparametric Test-Friedman’s Two-Way Analysis of Variance was used to assess the differences between the periods and Tukey multiple comparison tests were applied. 

Results: Statistically significant bone activity increase was determined in the right posterior site of the mid-palatal suture region, both right and left zygomatic maxillary suture regions and left zygomaticotemporal suture regions in T2 period, whereas, it was decreased after six months’ retention period.

Conclusion: It has been revealed that bone activity is increased on posterior mid-palatal suture region within 9-weeks of CRME-C in early growth period of the boys.

Keywords: Class III Malocclusion; Maxillary Transvers Deficiency; Rapid Maxillary Expansion; Scintigraphy

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Citation: Hatice Gökalp. “Quantitative Evaluation of Consecutively Rapid Maxillary Expansions and Constrictions Effects on Circum-Maxillary Sutures in Boys by SPECT Bone Scintigraphy”. EC Dental Science 19.4 (2020): 48-59.

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