대한치과교정학회지 (The korean journal of orthodontics)

  • 제46권6호
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  • Pages.364-371
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  • 2016
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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Comparison of the bonding strengths of second- and third-generation light-emitting diode light-curing units

  • Lee, Hee-Min (Department of Orthodontics, College of Dentistry, Wonkwang University) ;
  • Kim, Sang-Cheol (Department of Orthodontics, College of Dentistry, Wonkwang University) ;
  • Kang, Kyung-Hwa (Department of Orthodontics, College of Dentistry, Wonkwang University) ;
  • Chang, Na-Young (Department of Orthodontics, Wonkwang University Daejeon Dental Hospital)
  • 투고 : 2015.09.23
  • 심사 : 2016.01.19
  • 발행 : 2016.11.25
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초록

Objective: With the introduction of third-generation light-emitting diodes (LEDs) in dental practice, it is necessary to compare their bracket-bonding effects, safety, and efficacy with those of the second-generation units. Methods: In this study, 80 extracted human premolars were randomly divided into eight groups of 10 samples each. Metal or polycrystalline ceramic brackets were bonded on the teeth using second- or third-generation LED light-curing units (LCUs), according to the manufacturers' instructions. The shear bond strengths were measured using the universal testing machine, and the adhesive remnant index (ARI) was scored by assessing the residual resin on the surfaces of debonded teeth using a scanning electron microscope. In addition, curing times were also measured. Results: The shear bond strengths in all experimental groups were higher than the acceptable clinical shear bond strengths, regardless of the curing unit used. In both LED LCU groups, all ceramic bracket groups showed significantly higher shear bond strengths than did the metal bracket groups except the plasma emulation group which showed no significant difference. When comparing units within the same bracket type, no differences in shear bond strength were observed between the second- and third-generation unit groups. Additionally, no significant differences were observed among the groups for the ARI. Conclusions: The bracket-bonding effects and ARIs of second- and third-generation LED LCUs showed few differences, and most were without statistical significance; however, the curing time was shorter for the second-generation unit.

키워드

참고문헌

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피인용 문헌

  1. Effect of different bonding protocols on degree of monomer conversion and bond strength between orthodontic brackets and enamel vol.32, pp.None, 2018, https://doi.org/10.1590/1807-3107bor-2018.vol32.0058
  2. Influence of radiant exposure values from two third generation LED curing units on polymerization profile and microhardness of orthodontic composite under ceramic and metallic brackets vol.26, pp.1, 2021, https://doi.org/10.1590/2177-6709.26.1.e2119150.oar
  3. Comparative study of three composite materials in bonding attachments for clear aligners vol.24, pp.4, 2016, https://doi.org/10.1111/ocr.12465