Three-dimensional quantification of orthodontic root resorption with time-lapsed imaging of micro-computed tomography in a rodent model.
J Xray Sci Technol
; 23(5): 617-26, 2015.
Article
em En
| MEDLINE
| ID: mdl-26409429
ABSTRACT
OBJECTIVE:
Despite various X-ray approaches have been widely used to monitor root resorption after orthodontic treatment, a non-invasive and accurate method is highly desirable for long-term follow up. The aim of this study was to build a non-invasive method to quantify longitudinal orthodontic root resorption with time-lapsed images of micro-computed tomography (micro-CT) in a rodent model. MATERIALS ANDMETHODS:
Twenty male Sprague Dawley (SD) rats (aged 6-8 weeks, weighing 180-220 g) were used in this study. A 25 g orthodontic force generated by nickel-titanium coil spring was applied to the right maxillary first molar for each rat, while contralateral first molar was severed as a control. Micro-CT scan was performed at day 0 (before orthodontic load) and days 3, 7, 14, and 28 after orthodontic load. Resorption of mesial root of maxillary first molars at bilateral sides was calculated from micro-CT images with registration algorithm via reconstruction, superimposition and partition operations.RESULTS:
Obvious resorption of mesial root of maxillary first molar can be detected at day 14 and day 28 at orthodontic side. Most of the resorption occurred in the apical region at distal side and cervical region at mesiolingual side. Desirable development of molar root of rats was identified from day 0 to day 28 at control side. The development of root concentrated on apical region.CONCLUSIONS:
This non-invasive 3D quantification method with registration algorithm can be used in longitudinal study of root resorption. Obvious root resorption in rat molar can be observed three-dimensionally at day 14 and day 28 after orthodontic load. This indicates that registration algorithm combined with time-lapsed images provides clinic potential application in detection and quantification of root contour.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Reabsorção da Raiz
/
Raiz Dentária
/
Imageamento Tridimensional
/
Microtomografia por Raio-X
/
Imagem com Lapso de Tempo
Tipo de estudo:
Observational_studies
Limite:
Animals
Idioma:
En
Revista:
J Xray Sci Technol
Assunto da revista:
RADIOLOGIA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
China