Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength
ABSTRACT Introduction: Many patients seeking orthodontic treatment already have incipient enamel lesions and should be placed under preventive treatments. The aim of this in vitro study was to evaluate the effect of CPP-ACP paste and CO2 laser irradiation on demineralized enamel microhardness and...
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| Format: | Article |
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Dental Press Editora
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| Series: | Dental Press Journal of Orthodontics |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000400053&lng=en&tlng=en |
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| author | Nasrin Farhadian Loghman Rezaei-Soufi Seyed Farzad Jamalian Maryam Farhadian Shahrzad Tamasoki Milad Malekshoar Bahareh Javanshir |
| author_facet | Nasrin Farhadian Loghman Rezaei-Soufi Seyed Farzad Jamalian Maryam Farhadian Shahrzad Tamasoki Milad Malekshoar Bahareh Javanshir |
| author_sort | Nasrin Farhadian |
| collection | DOAJ |
| description | ABSTRACT Introduction: Many patients seeking orthodontic treatment already have incipient enamel lesions and should be placed under preventive treatments. The aim of this in vitro study was to evaluate the effect of CPP-ACP paste and CO2 laser irradiation on demineralized enamel microhardness and shear bond strength of orthodontic brackets. Methods: Eighty caries-free human premolars were subjected to a demineralization challenge using Streptococcus mutans. After demineralization, the samples were randomly divided into five equal experimental groups: Group 1 (control), the brackets were bonded without any surface treatment; Group 2, the enamel surfaces were treated with CPP-ACP paste for 4 minutes before bonding; Group 3, the teeth were irradiated with CO2 laser beams at a wavelength of 10.6 µm for 20 seconds. The samples in Groups 4 and 5 were treated with CO2 laser either before or through CPP-ACP application. SEM photomicrographs of a tooth from each group were taken to observe the enamel surface. The brackets were bonded to the buccal enamel using a conventional method. Shear bond strength of brackets and ARI scores were measured. Vickers microhardness was measured on the non-bonded enamel surface. Data were analyzed with ANOVA and Tukey test at the p< 0.05 level. Results: The mean shear bond strength and microhardness of the laser group were higher than those in the control group and this difference was statistically significant (p< 0.05). All groups showed a higher percentage of ARI score 4. Conclusion: CO2 laser at a wavelength of 10.6 µm significantly increased demineralized enamel microhardness and enhanced bonding to demineralized enamel. |
| first_indexed | 2024-12-11T15:19:14Z |
| format | Article |
| id | doaj.art-a9cb7120a5fe4cbdbe3cdd6abb797cc6 |
| institution | Directory Open Access Journal |
| issn | 2177-6709 |
| language | English |
| last_indexed | 2024-12-11T15:19:14Z |
| publisher | Dental Press Editora |
| record_format | Article |
| series | Dental Press Journal of Orthodontics |
| spelling | doaj.art-a9cb7120a5fe4cbdbe3cdd6abb797cc62022-12-22T01:00:26ZengDental Press EditoraDental Press Journal of Orthodontics2177-6709224536010.1590/2177-6709.22.4.053-060.oarS2176-94512017000400053Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strengthNasrin FarhadianLoghman Rezaei-SoufiSeyed Farzad JamalianMaryam FarhadianShahrzad TamasokiMilad MalekshoarBahareh JavanshirABSTRACT Introduction: Many patients seeking orthodontic treatment already have incipient enamel lesions and should be placed under preventive treatments. The aim of this in vitro study was to evaluate the effect of CPP-ACP paste and CO2 laser irradiation on demineralized enamel microhardness and shear bond strength of orthodontic brackets. Methods: Eighty caries-free human premolars were subjected to a demineralization challenge using Streptococcus mutans. After demineralization, the samples were randomly divided into five equal experimental groups: Group 1 (control), the brackets were bonded without any surface treatment; Group 2, the enamel surfaces were treated with CPP-ACP paste for 4 minutes before bonding; Group 3, the teeth were irradiated with CO2 laser beams at a wavelength of 10.6 µm for 20 seconds. The samples in Groups 4 and 5 were treated with CO2 laser either before or through CPP-ACP application. SEM photomicrographs of a tooth from each group were taken to observe the enamel surface. The brackets were bonded to the buccal enamel using a conventional method. Shear bond strength of brackets and ARI scores were measured. Vickers microhardness was measured on the non-bonded enamel surface. Data were analyzed with ANOVA and Tukey test at the p< 0.05 level. Results: The mean shear bond strength and microhardness of the laser group were higher than those in the control group and this difference was statistically significant (p< 0.05). All groups showed a higher percentage of ARI score 4. Conclusion: CO2 laser at a wavelength of 10.6 µm significantly increased demineralized enamel microhardness and enhanced bonding to demineralized enamel.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000400053&lng=en&tlng=enOrthodonticsBondingEnamelCasein phosphopeptide-amorphous calcium phosphateLaser. |
| spellingShingle | Nasrin Farhadian Loghman Rezaei-Soufi Seyed Farzad Jamalian Maryam Farhadian Shahrzad Tamasoki Milad Malekshoar Bahareh Javanshir Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength Dental Press Journal of Orthodontics Orthodontics Bonding Enamel Casein phosphopeptide-amorphous calcium phosphate Laser. |
| title | Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength |
| title_full | Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength |
| title_fullStr | Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength |
| title_full_unstemmed | Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength |
| title_short | Effect of CPP-ACP paste with and without CO2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength |
| title_sort | effect of cpp acp paste with and without co2 laser irradiation on demineralized enamel microhardness and bracket shear bond strength |
| topic | Orthodontics Bonding Enamel Casein phosphopeptide-amorphous calcium phosphate Laser. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000400053&lng=en&tlng=en |
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