Effect of light-curing units in shear bond strength of metallic brackets: an in vitro study
J. appl. oral sci
;
18(1): 68-74, Jan.-Feb. 2010. ilus, tab
Article
in English
| LILACS
| ID: lil-545029
ABSTRACT
OBJECTIVES:
To determine the influence of the light curing units on the shear bond strength of orthodontic brackets. MATERIAL ANDMETHODS:
Seventy-two premolars were divided into six groups (n=12) Group I brackets bonded with Transbond and polymerization with halogen light; Group II Transbond and LED; Group III Fuji Ortho and halogen light; Group IV Fuji Ortho and LED; Group V Fuji Ortho, without acid and halogen light; Group VI Fuji Ortho, without acid and LED. The groups were tested to shear strength in a universal testing machine at a crosshead speed of 0.5 mm/min. Data were analyzed statistically by ANOVA and Tukey's test.RESULTS:
The composite resin presented higher shear bond strength than the resin-modified glass ionomer cement (p<0.05). The halogen light and LED sources produced similar shear bond strength (p>0.05).CONCLUSION:
The shear bond strength was influenced by the material but not by the light-curing unit. The use of LED reduced the experimental time by approximately 60 percent, with the same curing efficiency.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Dental Bonding
/
Orthodontic Brackets
/
Dental Alloys
/
Dental Cements
/
Curing Lights, Dental
Type of study:
Controlled clinical trial
Limits:
Humans
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2010
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Pontifical Catholic University of Rio Grande do Sul/BR
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