Study of UV-curable composite resin of transfer tray for orthodontics View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2008-09-06

AUTHORS

Lin Yang, Wei Wu, Bao-hua Xu, Pei-zeng Jia, Jun Nie

ABSTRACT

Objectivethe aim of this study was to investigate the properties of UV-curable composite resin of transfer tray for indirect bonding system of the lingual brackets.Methodsthe conversion of double-bond in the different concentration of UV-initiator was monitored by real time infrared (RTIR). The three-point flexure strength was measured by a universal testing machine. The storage modulus, loss modulus, and loss factor (tan delta) of the resin were measured by a Dynamic Mechanical Analyzer. The cytotoxicity of composite resin was evaluated by the agar covering test.Resultsthe double bond conversion exceeded 70% at [benzophenone] = 0.7 wt.%, [Ethyl 4-dimethylaminobenzoate] = 0.7 wt.% and [2-Hydroxy-2-methyl-1-phenyl propanon] = 1 wt.%. The mean value of flexural strength came to 122 MPa. The value of storage modulus was 1.04 × 109 MPa at 23°C. The glass transition temperature was 142°C. The toxicity grade was zero at 2 h and one at 24 h.Conclusionin the preliminary evaluations, we indicated that the UV-curable composite resin of transfer tray could satisfy the clinical requirements. More... »

PAGES

430-436

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11706-008-0060-2

DOI

http://dx.doi.org/10.1007/s11706-008-0060-2

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1009686504


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