Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units
Objectives: The aim of this study was to evaluate the effect of conventional and high-power light emitting diode (LED) light curing units on shear bond strength (SBS) of metal and ceramic brackets to tooth surface. Materials and Methods: Forty sound bovine maxillary central incisors were used for th...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
2017-01-01
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| Series: | Frontiers in Dentistry |
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| Online Access: | https://jdt.tums.ac.ir/index.php/jdt/article/view/973 |
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| author | Javad Chalipa Yasamin Farajzadeh Jalali Fatemeh Gorjizadeh Pedram Baghaeian Mohammad Hashem Hoseini Omid Mortezai |
| author_facet | Javad Chalipa Yasamin Farajzadeh Jalali Fatemeh Gorjizadeh Pedram Baghaeian Mohammad Hashem Hoseini Omid Mortezai |
| author_sort | Javad Chalipa |
| collection | DOAJ |
| description | Objectives: The aim of this study was to evaluate the effect of conventional and high-power light emitting diode (LED) light curing units on shear bond strength (SBS) of metal and ceramic brackets to tooth surface.
Materials and Methods: Forty sound bovine maxillary central incisors were used for the study. The teeth were divided into four groups (n=10). Teeth surfaces were etched with 37% phosphoric acid for 20 seconds. After applying a uniform layer of adhesive primer on the etched enamel, composite was placed on the base of brackets. The samples were light cured according to the manufacturer’s instructions and thermocycled. The SBS was measured. The failure mode was scored using the adhesive remnant index (ARI).
Results: The mean SBS of samples in groups A (high-power LED, metal bracket), B (high-power LED, ceramic bracket), C (conventional LED, metal bracket) and D (conventional LED, ceramic bracket) was 23.1±3.69, 10.7±2.06, 24.92±6.37 and 10.74±3.18MPa, respectively. The interaction effect of type of LED unit (high-power/conventional) and bracket type on SBS was not statistically significant (P=0.483). In general, type of LED unit did not affect SBS. Type of bracket significantly affected SBS (P<0.001). The ARI score was not significantly influenced by the interaction between the type of LED unit and bracket.
Conclusions: The obtained SBS is the same for both bracket types by use of high-power and conventional LED light curing units. Regardless of the type of LED unit, SBS of ceramic brackets was significantly lower than that of metal brackets. |
| first_indexed | 2024-12-19T02:00:19Z |
| format | Article |
| id | doaj.art-d943dbef00844bb7a9eb6d1f75373fc2 |
| institution | Directory Open Access Journal |
| issn | 2676-296X |
| language | English |
| last_indexed | 2024-12-19T02:00:19Z |
| publishDate | 2017-01-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Frontiers in Dentistry |
| spelling | doaj.art-d943dbef00844bb7a9eb6d1f75373fc22022-12-21T20:41:04ZengTehran University of Medical SciencesFrontiers in Dentistry2676-296X2017-01-01136891Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing UnitsJavad Chalipa0Yasamin Farajzadeh Jalali1Fatemeh Gorjizadeh2Pedram Baghaeian3Mohammad Hashem Hoseini4Omid Mortezai5Assistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Orthodontics, School of Dentistry, Ilam University of Medical Science, Ilam, IranAssistant Professor, Department of Orthodontics, School of Dentistry, Yasuj University of Medical Science, Yasuj, IranPrivate Practice Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Orthodontics, Qazvin University of Medical Sciences, Qazvin, IranObjectives: The aim of this study was to evaluate the effect of conventional and high-power light emitting diode (LED) light curing units on shear bond strength (SBS) of metal and ceramic brackets to tooth surface. Materials and Methods: Forty sound bovine maxillary central incisors were used for the study. The teeth were divided into four groups (n=10). Teeth surfaces were etched with 37% phosphoric acid for 20 seconds. After applying a uniform layer of adhesive primer on the etched enamel, composite was placed on the base of brackets. The samples were light cured according to the manufacturer’s instructions and thermocycled. The SBS was measured. The failure mode was scored using the adhesive remnant index (ARI). Results: The mean SBS of samples in groups A (high-power LED, metal bracket), B (high-power LED, ceramic bracket), C (conventional LED, metal bracket) and D (conventional LED, ceramic bracket) was 23.1±3.69, 10.7±2.06, 24.92±6.37 and 10.74±3.18MPa, respectively. The interaction effect of type of LED unit (high-power/conventional) and bracket type on SBS was not statistically significant (P=0.483). In general, type of LED unit did not affect SBS. Type of bracket significantly affected SBS (P<0.001). The ARI score was not significantly influenced by the interaction between the type of LED unit and bracket. Conclusions: The obtained SBS is the same for both bracket types by use of high-power and conventional LED light curing units. Regardless of the type of LED unit, SBS of ceramic brackets was significantly lower than that of metal brackets.https://jdt.tums.ac.ir/index.php/jdt/article/view/973Orthodontic BracketsShear StrengthLight-Curing of Dental Adhesives |
| spellingShingle | Javad Chalipa Yasamin Farajzadeh Jalali Fatemeh Gorjizadeh Pedram Baghaeian Mohammad Hashem Hoseini Omid Mortezai Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units Frontiers in Dentistry Orthodontic Brackets Shear Strength Light-Curing of Dental Adhesives |
| title | Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units |
| title_full | Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units |
| title_fullStr | Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units |
| title_full_unstemmed | Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units |
| title_short | Comparison of Bond Strength of Metal and Ceramic Brackets Bonded with Conventional and High-Power LED Light Curing Units |
| title_sort | comparison of bond strength of metal and ceramic brackets bonded with conventional and high power led light curing units |
| topic | Orthodontic Brackets Shear Strength Light-Curing of Dental Adhesives |
| url | https://jdt.tums.ac.ir/index.php/jdt/article/view/973 |
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