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Ossification of the midpalatal suture 6 months after surgically assisted rapid palatal expansion in adults

Sepideh Dadgar
Postgraduate  Student, Dept. of Orthodontics, Dental School, Khorasgan  Islamic Azad University

Objective:
One of the major components in several malocclusions is Transverse maxillomandibular discrepancies. Nowadays Surgically assisted rapid palatal expansion (SARPE) is a popular treatment option to correct maxillary transverse deficiency especially in skeletally matured patients. The aim of this study was to evaluate changes in bone density of the midpalatal suture after SARPE via computed tomography (CT) before SARPE(T0), immediately after expansion (T1), and after a retention period of 6 months (T2).
Methods & Materials:
The study sample comprised 15 adult patients (mean age, 23.6 years) 7 males and 8 females with constricted maxillary arches and unilateral or bilateral posterior crossbite. Axial CT scans were taken at T0, T1, and T2.Bone structure and density were assessed in the coronal plane at the anterior, median, and posterior levels.
Results:
Axial CT scan images in the three planes(anterior, median and, posterior) showed significant decreases in density from T0 to T1 and also T0 to T2 and significant increases from T1 to T2(p≤0.05).The increase in density from T1 to T2 in the posterior part was more than anterior or median part but the difference was still insignificant.(p=0.07)
Conclusions:
Six months after SARPE, the density of midpalatal suture is not enough to resist against forces which cause relapse, so to maintain the gained expansion, retention time should be lengthened.


Key words:
Surgically assisted rapid palatal expansion (SARPE), CT scan, Midpalatal suture, Ossification.


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محل نشر یا ارائه:  کنگره 10 انجمن ارتودنتیست ها
سال ایرانی :  1391
موضوع:  ارتودنسی
Level:  Postgraduate

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