Color stability of laboratory glass-fiber-reinforced plastics for esthetic orthodontic wires / 대한치과교정학회지
The Korean Journal of Orthodontics
;
: 130-135, 2015.
Article
in English
| WPRIM
| ID: wpr-201494
ABSTRACT
OBJECTIVE:
In our previous study, glass-fiber-reinforced plastics (GFRPs) made from polycarbonate and glass fibers were prepared for esthetic orthodontic wires using pultrusion. These laboratory GFRP wires are more transparent than the commercially available nickel-titanium wire; however, an investigation of the color stability of GFRP during orthodontic treatment is needed. Accordingly, in the present study, the color stability of GFRP was assessed using colorimetry.METHODS:
Preparation of GFRP esthetic round wires (diameter 0.45 mm [0.018 inch]) using pultrusion was described previously. Here, to investigate how the diameter of fiber reinforcement affects color stability, GFRPs were prepared by incorporating either 13-microm (GFRP-13) or 7-microm glass (GFRP-7) fibers. The color changes of GFRPs after 24 h, and following 1, 2, and 4 weeks of coffee immersion at 37degrees C, were measured by colorimetry. We evaluated the color stability of GFRPs by two evaluating units the color difference (DeltaE*) and National Bureau of Standards (NBS).RESULTS:
After immersion, both GFRPs showed almost no visible color change. According to the colorimetry measurements, the DeltaE* values of GFRP-13 and GFRP-7 were 0.73-1.16, and 0.62-1.10, respectively. In accordance with NBS units, both GFRPs showed "slight" color changes. As a result, there were no significant differences in the DeltaE* values or NBS units for GFRP-13 or GFRP-7. Moreover, for both GFRPs, no significant differences were observed in any of the immersion periods.CONCLUSIONS:
Our findings suggest that the GFRPs will maintain high color stability during orthodontic treatment, and are an attractive prospect as esthetic orthodontic wires.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Orthodontic Wires
/
Plastics
/
Coffee
/
Colorimetry
/
Esthetics
/
Glass
/
Immersion
Type of study:
Practice guideline
Language:
English
Journal:
The Korean Journal of Orthodontics
Year:
2015
Type:
Article
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