The extent of root resorption and tooth movement following the application of ascending and descending magnetic forces: a prospective split mouth, microcomputed-tomography study
| Autor: | Tamer Turk, Selma Elekdag-Turk, Peter Petocz, Ersan Ilsay Karadeniz, M. Ali Darendeliler, Tiffany T.Y. Huang, Carmen Gonzales, Oyku Dalci, Mohammed Almuzian |
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| Přispěvatelé: | OMÜ |
| Rok vydání: | 2017 |
| Předmět: |
Male
Mesial Surface X-ray microtomography Adolescent Tooth Movement Techniques Magnetic Field Therapy Root Resorption Dentistry Orthodontics Root resorption 03 medical and health sciences 0302 clinical medicine stomatognathic system Buccal Surface medicine Humans Bicuspid Prospective Studies Tooth Root business.industry 030206 dentistry Buccal administration X-Ray Microtomography medicine.disease Polyvinyl siloxane Tooth movement Maxilla Female Stress Mechanical business 030217 neurology & neurosurgery |
| Zdroj: | European journal of orthodontics. 39(5) |
| ISSN: | 1460-2210 |
| Popis: | Karadeniz, Carmen/0000-0003-2371-9037; Karadeniz, Carmen B/0000-0003-2371-9037; Almuzian, Mohammed/0000-0002-1696-6649; Karadeniz, Ersan/0000-0001-7652-0801; Elekdag-Turk, Selma/0000-0002-2799-6501 WOS: 000412223000013 PubMed: 28339645 Objective:Various factors have been examined in the literature in an attempt to reduce the incidence and severity of root resorption. The purpose of the present investigation is to test the null hypothesis that there is no difference in relation to force level using gradually increasing (ascending) and decreasing (descending) orthodontic force generated by magnets on the severity of Orthodontically Induced Inflammatory Iatrogenic Root Resorption (OIIRR) and amount of tooth movement. Methods:Twenty maxillary first premolars from 10 patients were subjected to ascending (25-225 g, magnets in attraction) and descending (225 to 25 g, magnets in repulsion) buccal forces using a split mouth design over an 8-week period. Polyvinyl siloxane impressions were taken at week 0, 4, and 8 to record the tooth movement. After 8 weeks, the teeth were extracted, scanned, with micro-CT in 16.9 mu m resolution, and the root resorption craters were localized circumferentially and quantified at each level of the root. Results:The total volume of OIIRR with ascending force was 1.20 mm(3), and with descending force was 1.25 mm(3), and there was no statistically significant difference between them. OIIRR on the palatal surface (0.012 mm(3)) was significantly less than on the buccal surface (0.057 mm(3)) and than on the mesial surface (0.035 mm(3)). There is no statistically significant difference in the degree of OIIRR between different level of the root (cervical, middle, and apical) at different surfaces. Moreover, the amount of tooth movement, at 0-, 4-, and 8-week interval, secondary to an ascending and descending force application was not statistically significant. Conclusions:There is no short-term (8 weeks) statistically significant difference between orthodontic ascending and descending forces, from 25 to 225 g and from 225 to 25 g, respectively, in term of severity and location of OIIRR as well as the amount of tooth movement. The buccal surface of the root showed highest degree of OIIRR compared to other root's surfaces. Australian Society of Orthodontists Foundation for Research and Education We acknowledge the Australian Society of Orthodontists Foundation for Research and Education for their financial assistance of this research. The authors also thank Professor William Walsh of the University of New South Wales and Mr Dennis Dwarte of the Australian Centre for Microscopy and Microanalysis for the facilities and the scientific and technical assistance. |
| Databáze: | OpenAIRE |
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