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Fukazawa K, Sawada T, Kuwajima Y, Sasaki K, Satoh K, Takemoto S. Tensile and shear bond strengths of a stainless steel used in orthodontic brackets bonded to bovine enamel using two types of resin cement. Dent Mater J 2023; 42:300-307. [PMID: 36775336 DOI: 10.4012/dmj.2022-198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The purpose of this study was to examine the relationship between the bond strength of stainless steel with two types of resin cements (MMA- and composite-based) on bovine enamel depending on the directionality of the applied force. The specimens were either placed in water or subjected to thermal cycles (TC), and the shear or tensile bond strengths (SBS or TBS) were determined. The SBS showed significantly greater than the TBS for both types of cement, and the SBS and TBS for composite-based cement had larger than MMA-based one. No significant difference in SBS was observed in the cements even after being subjected to TC. Cohesive failures of the cement and bovine enamel in the composite-based group, while adhesive failures were observed in MMA-based one. Consequently, the direction of the force at both cements affected the retention of stainless steel, and MMA-based cement was preferred when prioritizing less enamel damages.
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Affiliation(s)
- Keiko Fukazawa
- Division of Orthodontic, Department of Developmental Oral Health Science, School of Dentistry, Iwate Medical University
| | - Tomofumi Sawada
- Department of Biomedical Engineering, Iwate Medical University
| | - Yukinori Kuwajima
- Division of Orthodontic, Department of Developmental Oral Health Science, School of Dentistry, Iwate Medical University
| | - Kaori Sasaki
- Department of Biomedical Engineering, Iwate Medical University
| | - Kazuro Satoh
- Division of Orthodontic, Department of Developmental Oral Health Science, School of Dentistry, Iwate Medical University
| | - Shinji Takemoto
- Department of Biomedical Engineering, Iwate Medical University
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Eser I, Cicek O, Ozkalayci N, Yetmez M, Erener H. Effect of Different Types of Adhesive Agents on Orthodontic Bracket Shear Bond Strength: A Cyclic Loading Study. MATERIALS (BASEL, SWITZERLAND) 2023; 16:724. [PMID: 36676460 PMCID: PMC9863063 DOI: 10.3390/ma16020724] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Bracket failure is one of the most important problems encountered during fixed orthodontic treatment. For this reason, different types of adhesive agents have been developed over the years. Consequently, the aim of this study was to evaluate the shear bond strength of brackets bonded to teeth etched with a conventional acid etching method in a laboratory environment by using different types of adhesive agents and comparing the number of shear strokes. Sixty human maxillary premolars were divided into three groups and Gemini stainless steel metal brackets (3M Unitek, Monrovia, CA, USA) were bonded to all teeth. In Group 1, Transbond™ XT Primer (3M Unitek, Monrovia, CA, USA) and Transbond™ XT Light Cure Adhesive Paste composite (3M Unitek, Monrovia, CA, USA) were used. In Group 2, BracePaste® MTP Primer (American Orthodontics, Sheboygan, CA, USA) and BracePaste® Adhesive composite (American Orthodontics, Sheboygan, WI, USA) were used. In Group 3, Ortho Solo™ Primer (Ormco, Orange, CA, USA) and Grengloo™ Adhesive composite (Ormco, Brea, CA, USA) were used. The samples were subjected to a shear test with a closed-loop controlled, low-cycle fatigue machine with a capacity of 10 N and a crosshead speed of 300 mm/min. The number of shear strokes of the brackets was recorded. According to the Kruskal−Wallis and Mann−Whitney U tests performed on the data obtained, statistically significant differences were found between the groups in terms of the numbers of shear strokes (p < 0.05). Significantly higher numbers of shear strokes and higher shear bond strengths were observed in Group 3 compared with Group 1 and Group 2 (p < 0.05). There was no statistically significant difference between the numbers of shear strokes for Group 1 and Group 2 samples (p > 0.05). To conclude the study, it was observed that the type of adhesive used had an effect on the bond strength of the bracket and that the Grengloo™ adhesive agent showed higher shear bond strength. It was observed that BracePaste® Adhesive and Transbond™ XT Light Cure Adhesive Paste adhesive agents had similar shear bond strengths.
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Affiliation(s)
- Irfan Eser
- Department of Orthodontics, Faculty of Dentistry, Zonguldak Bulent Ecevit University, Zonguldak 67100, Turkey
| | - Orhan Cicek
- Department of Orthodontics, Faculty of Dentistry, Zonguldak Bulent Ecevit University, Zonguldak 67100, Turkey
| | - Nurhat Ozkalayci
- Department of Healthcare Management, Boyabat Faculty of Economics and Administrative Sciences, Sinop University, Sinop 57000, Turkey
| | - Mehmet Yetmez
- Department of Mechanical Engineering, Faculty of Engineering, Zonguldak Bulent Ecevit University, Zonguldak 67100, Turkey
| | - Hande Erener
- Department of Orthodontics, Faculty of Dentistry, Tekirdag Namık Kemal University, Tekirdag 59030, Turkey
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Evaluation of shear bond strength and adhesive remnant index of metal APC™ Flash-Free adhesive system: A comparative in vitro study with APC™ II and uncoated metal brackets. Int Orthod 2022; 20:100705. [PMID: 36280583 DOI: 10.1016/j.ortho.2022.100705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/29/2022] [Accepted: 10/01/2022] [Indexed: 11/07/2022]
Abstract
OBJECTIVE The aim of this in vitro study was to compare the shear bond strength (SBS) and the adhesive remnant index (ARI) of the metal APC™ Flash-Free adhesive system, the APC™ pre-coated adhesive system and a conventional uncoated system. MATERIALS AND METHODS One hundred eighty-six freshly extracted human premolars were randomly divided into 3 groups and bonded by a single operator. Group A/Control Group (60 teeth): the manual bonding group treated with Transbond™ XT Light Cure Adhesive Paste (3M™ Unitek). Group B (60 teeth): treated with APC™II metal maxillary premolar precoated brackets. Group C (66 teeth): treated with metal maxillary premolar APC Flash-Free brackets. The teeth were then stored in distilled water at 37̊C for 24hours, and five hundred cycles of thermocycling were performed. The Shear Bond Strength (SBS) test was performed using an Instron Universal Testing Machine, and the adhesive remnant index (ARI) was determined using a dental optical microscope at ×25 magnification. RESULTS The mean shear bond strength values showed differences between the three types of brackets (P=0.016; Anova). It was significantly higher with APC™II and lower with APC Flash-Free brackets; however, no significant differences were found between conventional and APC Flash-Free brackets (P-value=0.574). The distribution of the dichotomized ARI score was significantly different between the three brackets (P-value=0.049). The ARI score for APC Flash-Free brackets was higher with no significant difference between the conventional system and APC brackets (P-value=0.361). CONCLUSIONS The mean SBS values were not significantly different between APC Flash-Free metal brackets and uncoated metal brackets. The APC Flash-Free metal system's bond failure occurred at the bracket-adhesive interface, with the highest percentage of teeth having more than 50% of the residual composite on the enamel after debonding.
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Effects of enamel deproteinization with different application times on the shear bond strength of a self-etching primer: An in vitro study. Int Orthod 2021; 19:505-511. [PMID: 34112607 DOI: 10.1016/j.ortho.2021.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 11/20/2022]
Abstract
OBJECTIVE The aim of this in vitro study was to evaluate the effects of enamel deproteinization on the shear bond strength of a self-etching primer Transbond Plus™(TBP), with different application times of sodium hypochlorite (NaOCl 5.25%), primarily and secondarily on the adhesive remnant index score. MATERIALS AND METHODS One hundred twenty-five freshly extracted human premolars were randomly and blindly divided into five groups according to the enamel surface preparation, as follows (n=25): group 1(control): Etching with 37% phosphoric acid for 15seconds+Bonding; group 2 (control): TBP™ without NaOCl, group 3: 60seconds NaOCl+TBP™, group 4: 30seconds NaOCl+TBP™, group 5: 15seconds NaOCl+TBP™. The same composite resin was used (Transbond XT™) to bond the orthodontic metal brackets. After the immersion of the teeth in distilled water at 37°C for 24hours the shear bond strength was measured using the universal testing machine and the adhesive remnant index score (ARI) was evaluated under an optical microscope (25×). RESULTS The mean SBS values (inMPa) of the groups were respectively: group 1: 13.03±5.36; group 2: 12.28±3.06; group 3: 12.38±4.55; group 4: 12.98±5.76; and group 5: 11.73±5.67. Enamel deproteinization increased the SBS for groups 3 and 4, but no statistically significant difference was found between the five groups (P=0.883). Group 1 showed the highest ARI scores, with 52% of the teeth retaining all the adhesive (score 3). However, for all the other groups, scores 0 and 1 were predominant, with less than half of the adhesive or no adhesive at all remaining on the teeth. CONCLUSIONS Enamel deproteinization with sodium hypochlorite (5.25%) and the variation of its application time has no effect on the SBS of the self-etching primer Transbond Plus ™.
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Yuzbasioglu Ertugrul B, Alkan Ö. Evaluation of the effects of two different indirect bonding methods on strength of the brackets in mandibular model of severe anterior crowding. Microsc Res Tech 2021; 84:1181-1191. [PMID: 33913223 DOI: 10.1002/jemt.23677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/30/2020] [Accepted: 12/08/2020] [Indexed: 11/05/2022]
Abstract
An indirect bonding method was developed to solve the problems likely to be encountered during proper positioning of the brackets. The aim of this study is to compare two different indirect bonding methods on the bond strength of the brackets. A 160 extracted human lower incisors were assigned into two groups. Transparent silicone material and bioplast material were used in transfer tray preparation in groups 1 and 2, respectively. Transbond XT adhesive system was used to bond brackets to teeth in both groups. A high intensity LED light source was used for 3 s for adhesive polymerization. Brackets were subjected to shear forces with universal test machine under 0.5 mm/min crosshead speed until failure. Adhesive Remnant Index was used to assess the amount of adhesive remnant on enamel surface after shear test under 10× magnification. Two subjects from both groups were evaluated for enamel surface characteristics with scanning electron microscope (SEM). Mean shear bond strengths were found to be 5.13 ± 1.8 MPa and 5.93 ± 2.19 MPa for silicone and bioplast groups, respectively. Bioplast group showed significantly greater shear bond strength than that of the silicone group. Maximum ARI score, assessed under ×10 magnification was 3 in both groups. A score of 3 was significantly more frequent in bioplast group. Differences were seen between the groups in terms of enamel surface characteristics under SEM evaluation. It was determined that bioplast material, which is considered to be the gold standard for the indirect bonding method, has greater shear bond strength than silicone material.
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Affiliation(s)
| | - Özer Alkan
- Department of Orthodontics, Ankara Yıldırım Beyazit University Faculty of Dentistry, Ankara, Turkey
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De Roo NMC, Deboosere E, Thierens LAM, Vercruysse C, Temmerman L, Verbeeck RMH, Pauw GAMDE. The orthodontic bonding properties of human enamel after cryopreservation. Dent Mater J 2020; 39:950-955. [PMID: 32595189 DOI: 10.4012/dmj.2019-208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim was to investigate the effect of cryopreservation on the enamel bonding properties of orthodontic brackets. Sixty-six human premolars were randomly allocated to a control group or a cryopreserved group. Conventional stainless-steel orthodontic brackets were bonded with a light cure adhesive on the buccal side of the premolars. The shear bond strength (SBS) was determined at a crosshead speed of 1 mm/min. The SBS and adhesive remnant index (ARI) were evaluated respectively by an independent samples t test and Fisher's exact test (α≤0.05). The mean failure load was lower in the cryopreserved group. However, this difference in SBS was not significant (p=0.443). In both groups, the ARI mostly indicated a failure at the enamel-adhesive interface. The mean ARI scores for both groups were not significantly different (p=0.099). Within the limitations of this macro bond strength testing, it can be concluded that cryopreservation does not significantly affect the bonding properties of enamel.
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Affiliation(s)
- Noëmi M C De Roo
- Oral Health Sciences, Department of Orthodontics, Ghent University
| | - Eline Deboosere
- Oral Health Sciences, Department of Orthodontics, Ghent University
| | | | - Chris Vercruysse
- Biomaterials Group, Department of Basic Medical Sciences, Ghent University
| | | | | | - Guy A M DE Pauw
- Oral Health Sciences, Department of Orthodontics, Ghent University
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Cicek O, Ozkalayci N, Yetmez M. Mean Shearing Stroke Frequency of Orthodontic Brackets under Cycling Loading: An In Vitro Study. MATERIALS 2020; 13:ma13194280. [PMID: 32992817 PMCID: PMC7579618 DOI: 10.3390/ma13194280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 12/05/2022]
Abstract
Based on the development of many adhesive systems and bonding techniques, bonding strength of orthodontic brackets has become even more important in modern clinical orthodontics. The aim of this study was to determine mean shearing stroke frequency of different orthodontic bracket types and bonding agents under cycling loading. Therefore, 10 different types of orthodontic bracket from 4 different brands were divided into 2 groups. Two different adhesives, namely Transbond™ XT etch-and-rinse for Group 1 and Transbond™ Plus self-etching-primer adhesive for Group 2 were considered. The brackets were tested under cycling loading force of 10-N and a crosshead speed of 300 mm/min and 40 cycle/min. The frequency of strokes that the brackets failed were determined and these data were analyzed by statistical analysis using an independent sample t-test and one-way analysis of variance (ANOVA). The level of significance was set at p < 0.05. Generally, differences between the frequency of shearing strokes of the bracket failures were found to be statistically significant depending on the type of adhesives and brackets (p < 0.05). The bonding technique for Group 1 was found to have a significantly higher shear bonding strength than Group 2. It is also seen that different types of bracket belonging to the same or different brands had different shear bonding strength. It may be concluded that: (i) all bracket types used in this study can be applied with both bonding techniques, (ii) in order to minimize the risk of hard tissue damage, ceramic brackets should be carefully bonded using the self-etching primary adhesive technique.
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Affiliation(s)
- Orhan Cicek
- Department of Orthodontics, Faculty of Dentistry, Zonguldak Bulent Ecevit University, 67600 Zonguldak, Turkey;
- Correspondence: or
| | - Nurhat Ozkalayci
- Department of Orthodontics, Faculty of Dentistry, Zonguldak Bulent Ecevit University, 67600 Zonguldak, Turkey;
| | - Mehmet Yetmez
- Department of Mechanical Engineering, Faculty of Engineering, Zonguldak Bulent Ecevit University, 67100 Zonguldak, Turkey;
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Dalaie K, Fatemi SM, Behnaz M, Ghaffari S, Hemmatian S, Soltani AD. Effect of different debonding techniques on shear bond strength and enamel cracks in simulated clinical set-ups. J World Fed Orthod 2020; 9:18-24. [PMID: 32672663 DOI: 10.1016/j.ejwf.2019.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/03/2019] [Accepted: 11/16/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the relationship between debonding forces and enamel cracks length change between different debonding techniques. METHODS 80 extracted premolar teeth with intact buccal enamel were divided into five groups. In each group, enamel cracks were evaluated by stereomicroscope before and after debonding. All teeth were bonded with metal brackets by self-cure adhesive (3M, USA) and then debonded by bracket debonding plier, fixed on the UTM machine, through five methods based on location of plier on brackets: OGwing (occlusogingival), MDwing (mesiodistal), Oblique, OGbase (occlusogingival) and Cusp-base. RESULTS Based on non-parametric distribution of data, there was no significant difference between groups in ARI and enamel cracks length change. The highest shear bond strength for debonding presented in OG base method (25.25 ± 8.4) and the difference was statistically significant (P-value = 0.029). There was no linear relationship between shear bond strength and cracks length change and also between ARI and cracks length change. CONCLUSION Despite the lower cracks length change in Cusp-base method than other groups, there wasn't significant difference between debonding methods. Also the amount of debonding forces and ARI do not affect the changes of cracks length.
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Affiliation(s)
- Kazem Dalaie
- Assistant Professor, Department of Orthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyyed Mostafa Fatemi
- Assistant Professor, Department of Dental Biomaterials, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Medical Laser Research Center, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Mohammad Behnaz
- Assistant Professor, Department of Orthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samin Ghaffari
- Postgraduate Student of Orthodontics, Dentofacial Deformities Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sahar Hemmatian
- Postgraduate Student of Periodontology, Dentistry Faculty, Hamedan University of Medical Sciences, Hamedan, Iran
| | - Anahita Dehghani Soltani
- Postgraduate Student of Orthodontics, Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Yetkin D, Sayar G. Effect of Fluoride Releasing Bonding Materials on Shear Bond Strength of Orthodontic Brackets. Turk J Orthod 2020; 33:52-58. [PMID: 32284899 DOI: 10.5152/turkjorthod.2020.19052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 08/25/2019] [Indexed: 11/22/2022]
Abstract
Objective The aim of the present study was to compare the shear bond strength (SBS) of three different fluoride-releasing bonding agents with a conventional adhesive system. Methods Eighty-four extracted human premolar teeth were separated into four groups and embedded in acrylic molds consisting of 21 teeth in each group. Brackets were bonded with Transbond XT in group 1, Clearfil SE Protect Bond in group 2, LED Proseal in group 3, and Opalseal in group 4. After bracket bonding, the teeth were thermocycled 1000 times. SBS test was performed, and Adhesive Remnant Index (ARI) scores of the groups were assessed. Results One-way analysis of variance test was used to compare the significant differences between the groups. Chi-square and Fisher's exact tests were used to evaluate ARI scores. The Opalseal group showed the highest bond strength, but there was no statistically significant difference between the groups in SBS values (p=0.067). The results of ARI scores were statistically significant. Conclusions All bonding materials used in the study showed clinically sufficient bond strengths.
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Affiliation(s)
- Duygu Yetkin
- Department of Orthodontics, Bahcesehir University School of Dentistry, İstanbul, Turkey
| | - Gülşilay Sayar
- Department of Orthodontics, İstanbul Medipol University School of Dentistry, İstanbul, Turkey
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Cruz-González AC, Delgado-Mejía E. Experimental study of brackets adhesion with a novel enamel-protective material compared with conventional etching. Saudi Dent J 2020; 32:36-42. [PMID: 31920277 PMCID: PMC6950845 DOI: 10.1016/j.sdentj.2019.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 05/15/2019] [Accepted: 05/15/2019] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION A reliable adhesion between fixed devices and dental surfaces is a key factor for the clinical success of any orthodontic treatment. Adhesion preparation is associated with damages related to abrasive cleaning, enamel structure defacing caused by etching, enamel loss when removing resin remnants at orthodontic treatment finishing stage or when conditioning surface for adhesive failure and fractures at bracket removal. AIM The objective of this study was to compare the shear bond strength of metallic brackets to enamel adhered with a novel non-damaging and remineralizing material for enamel versus the traditional 37% phosphoric acid etching. MATERIAL AND METHODS 75 Premolars collected from 15- to 40-years old healthy donors requiring extraction were collected. The teeth were then randomly divided into three groups (n = 25). One group was used for the experimental new method (EX), the second for the conventional phosphoric acid etching (PA) method and the third group was left without any treatment (NT). The metallic brackets were fixed with Transbond® XT adhesive and composite resin polymerized for 40 s with a halogen photocuring lamp. The shear bond strength was quantified by means of a universal testing machine at 1 mm/min crosshead speed and a load cell of 1 kN. STATISTICAL ANALYSIS USED Tests of normality, adjustment of the data to a root square, a one-way ANOVA and Tukey tests were performed. RESULTS Statistically significant differences between the NT (1.4 MPa), PA (32.1 MPa) and EX (9.7 MPa) groups were observed. CONCLUSIONS The experimental material for conditioning human enamel induces calcium phosphates crystals on the enamel surface and improves the bond strength in comparison to the NT group.
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Affiliation(s)
- Alberto-Carlos Cruz-González
- DDS, Universidad de Cartagena, Colombia
- Oral Rehabilitation and Master in Dentistry, Universidad Nacional of Colombia, Colombia
- Oral Health Department, Faculty of Dentistry, Universidad Nacional de Colombia, Colombia
| | - Edgar Delgado-Mejía
- Master of Science (Chemistry), State University of New York, United States
- Department of Chemistry, Faculty of Sciences, Universidad Nacional de Colombia, Bogotá, Colombia
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Goto S, Hasegawa Y, Miyagawa Y, Endo T. Effects of contact compressive force on bracket bond strength and adhesive thickness : Study using orthodontic resins with different viscosities. J Orofac Orthop 2019; 81:79-88. [PMID: 31853585 DOI: 10.1007/s00056-019-00202-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 09/27/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE To assess the effect of the contact compressive force to seat orthodontic brackets on shear bond strength (SBS) and adhesive thickness using adhesive resins with different viscosities. METHODS A total of 184 premolars were divided equally into eight groups of 23. Transbond XT and Beauty Ortho Bond paste viscous self-etching adhesive systems were used with contact compressive forces of 0.5, 1, 2, and 3 N (groups 1-4 and groups 5-8, respectively) via a push-pull tension gauge. SBS and adhesive thickness were measured in each adhesive system for each contact compressive force. RESULTS Significant differences existed in the SBSs between the adhesive systems for each contact compressive force and the SBSs were significantly higher in groups 1 (17 MPa) and 2 (16 MPa) than in groups 3 (14 MPa) and 4 (13 MPa). Significant differences existed for the adhesive thickness between the adhesive systems for the three contact compressive forces less than 3 N. The adhesive in group 1 (0.184 mm) was significantly thicker than that in groups 2-4 (from 0.098 to 0.129 mm). In groups 2 (0.129 mm) and 3 (0.121 mm) it was thicker than in group 4 (0.098 mm), and in group 5 (0.119 mm) it was thicker than in groups 6-8 (from 0.087 to 0.088 mm). CONCLUSIONS The high-viscosity adhesive Transbond XT exhibited higher SBSs than the low-viscosity Beauty Ortho Bond paste. For the adhesive Transbond XT, lower contact compressive forces produced greater adhesive thicknesses and higher SBSs. For the Beauty Ortho Bond paste, no significant changes in the adhesive thickness or SBS values were observed for contact compressive forces greater than 0.5 N.
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Affiliation(s)
- Sho Goto
- Orthodontics and Dentofacial Orthopedics, Field of Oral and Maxillofacial Growth and Development, Course of Clinical Science, The Nippon Dental University Graduate School of Life Dentistry at Niigata, 1-8 Hamaura-cho, 951-8580, Chuo-ku, Niigata, Japan.
| | - Yuh Hasegawa
- Orthodontics and Dentofacial Orthopedics, Field of Oral and Maxillofacial Growth and Development, Course of Clinical Science, The Nippon Dental University Graduate School of Life Dentistry at Niigata, 1-8 Hamaura-cho, 951-8580, Chuo-ku, Niigata, Japan.,Department of Orthodontics, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, 951-8580, Chuo-ku, Niigata, Japan
| | - Yukio Miyagawa
- The Nippon Dental University Graduate School of Life Dentistry at Niigata, 1-8 Hamaura-cho, 951-8580, Chuo-ku, Niigata, Japan
| | - Toshiya Endo
- Orthodontics and Dentofacial Orthopedics, Field of Oral and Maxillofacial Growth and Development, Course of Clinical Science, The Nippon Dental University Graduate School of Life Dentistry at Niigata, 1-8 Hamaura-cho, 951-8580, Chuo-ku, Niigata, Japan.,Department of Orthodontics, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, 951-8580, Chuo-ku, Niigata, Japan
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Andrews KM, Roberson G, Subramani K, Chaudhry K. The effect of dental chair light exposure duration on shear bond strength of orthodontic brackets: An in vitro study. J Clin Exp Dent 2019; 10:e1075-e1081. [PMID: 30607224 PMCID: PMC6311395 DOI: 10.4317/jced.55296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 10/03/2018] [Indexed: 11/05/2022] Open
Abstract
Background The purpose of this study is to determine if the duration of exposure to the halogen overhead dental chair light has an effect on shear bond strength (SBS) of metal orthodontic brackets. Material and Methods One hundred twenty extracted human lower incisor teeth were divided into six groups (n=20/group). Each group was assigned a predetermined duration of exposure to the halogen dental chair light, set at a fixed distance, before being cured. Light exposure times of 0 minutes (Group 1-Control), 1 minute (Group 2), 2.5 minutes (Group 3), 5 minutes (Group 4), 10 minutes (Group 5), and 15 minutes (Group 6) were tested. Each tooth was subjected to an exclusion criteria examination, scrubbed of all debris, and imbedded in a PVC-stone fixture with the crown of the tooth exposed above the stone surface. All groups had orthodontic brackets bonded with the same materials and process, then light cured for 6 seconds using the Valo LED curing unit after their designated light exposure time. Groups were tested using an Instron E-1000 universal testing machine with a shear load test set at a speed of 1mm/min using a knife-edged chisel. Data was analyzed using a one-way ANOVA test. The Adhesive Remnant Index (ARI) was scored under 10x magnification. The ARI data was analyzed using the Chi-square test (p-value < 0.05). Results All control and experimental groups for each specific tooth type tested resulted in SBS within or above the clinically acceptable range. Statistically significant differences (p<.05) were found between the control and experimental groups for dental chair light exposure times of 5 minutes, 10 minutes and 15 minutes. A chi-square test determined that there was statistical significance when evaluating the frequency of ARI scores when light exposure duration was greater than 5 minutes. Conclusions It can be concluded that dental chair light exposure in the 5 minute, 10 minute and 15 minute groups produced higher shear bond strength than those of the control, 1 minute and 2.5 minute groups. The dental chair light is capable of initiating polymerization and causing higher bond strengths than the clinical acceptability of 5.8-7.9 MPa, thus continued dental chair light exposure over 5 minutes is not recommended. The ARI analysis revealed that as bond strength increased, the fracture pattern shifted from most remaining adhesive attached to the tooth toward that attached to the bracket. Key words:Shear bond strength, orthodontic bracket, adhesive remnant index, dental chair light, light exposure, composite curing.
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Affiliation(s)
- Kevin M Andrews
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Glen Roberson
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Karthikeyan Subramani
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Kishore Chaudhry
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
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Patel N, Bollu P, Chaudhry K, Subramani K. The effect of orthodontic bracket pad shape on shear bond strength, an in vitro study on human enamel. J Clin Exp Dent 2018; 10:e789-e793. [PMID: 30305878 PMCID: PMC6174008 DOI: 10.4317/jced.55121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 07/18/2018] [Indexed: 11/05/2022] Open
Abstract
Background To evaluate the effect of bracket pad shape on shear bond strength (SBS) of orthodontic brackets bonded to human enamel. Material and Methods One hundred and five extracted human maxillary permanent molars were divided into 7 groups of 15 specimens per group (n=15). Each group of teeth was bonded with 6 different shaped WildSmiles® brackets (Star, Heart, Soccer ball, Football, Flower, and Diamond) and GAC® rectangle shaped brackets. Shear debonding force was measured with an Instron universal testing machine using a knife-edged chisel 24 hours after initial bonding. Descriptive statistics (mean, standard deviation, and range) for each bracket pad shape was calculated. Analysis of variance (ANOVA) using SPSS software version 24.0 was performed with P-value set at 0.05. Post-Hoc Tukey analysis was used to analyze differences among groups. Differences in Adhesive Remnant Index (ARI) scores among groups were analyzed using Chi-square test. Results Debonding force values (N ± SD) ranged from 205.51 ± 49.12 (Star) and 275.96 ± 69.05 (Soccer). SBS values (MPa ± SD) ranged from 13.34 ± 3.18 (Star) and 17.77 ± 6.94 (Rectangle). Even though intergroup comparison of SBS in Newtons revealed statistical significance (p = 0.014) between Star-Soccer and Star-Football group, it does not have any clinical significance since ranges of SBS of all groups are clinically acceptable. Analysis of ARI scores showed no significant differences in mode of bond failure among groups (P = 0.82). Conclusions Orthodontic bracket pad shape has no effect on SBS and does not affect the mode of fracture pattern. Key words:Shear bond strength, orthodontic bracket, bracket pad shape, orthodontic bracket base shape, adhesive remnant index.
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Affiliation(s)
- Nirav Patel
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Prashanti Bollu
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Kishore Chaudhry
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Karthikeyan Subramani
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
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Salama F, Alrejaye H, Aldosari M, Almosa N. Shear bond strength of new and rebonded orthodontic brackets to the enamel surfaces. J Orthod Sci 2018; 7:12. [PMID: 29963507 PMCID: PMC6004780 DOI: 10.4103/jos.jos_158_17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES The objective of this study was to compare the shear bond strength (SBS) of new and rebounded orthodontic brackets bonded to the buccal sound and cleaned enamel surfaces using two orthodontic adhesives: resin-modified glass-ionomer (RMGI) and resin-composite. MATERIALS AND METHODS Forty premolars were randomly allocated into four groups, 10 teeth/group. New and rebonded brackets were bonded to sound and cleaned enamel surface, and then were subjected to thermocycling. The bond strength was determined using a universal testing machine at a crosshead speed of 1 mm/min. Remaining adhesives on enamel after bracket debonding was scored independently by two investigators who were not aware of the four different groups, using adhesive remnant index (ARI). RESULTS There was a statistical significant difference in SBS of the four groups (P = 0.005). SBS values were significantly higher with cleaned enamel surfaces after adhesive removal compared to sound enamel. SBS was significantly higher for rebonded brackets, when compared with the new brackets. No significant difference was found between the two adhesives types. The level of agreement between the two raters was higher toward the classification of higher categories of ARI (scores 5 and 6) with agreement percentage 91.7% and 100%, respectively. There was more adhesive remained among resin-composite groups. CONCLUSIONS The bond strength of debonded sandblasted stainless-steel brackets was higher than new brackets. Resin-composite and RMGI orthodontic adhesives used in this study exhibited sufficient SBS values for bonding brackets to sound and cleaned enamel and comparable to each other.
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Affiliation(s)
- Fouad Salama
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, Saudi Arabia
| | - Hessa Alrejaye
- Orthodontic Resident, Boston University Henry M. Goldman School of Dental Medicine, Massachusetts, US
| | - Malak Aldosari
- Saudi Board Orthodontic Resident, King Saud University, Saudi Arabia
| | - Naif Almosa
- Department of Pediatric Dentistry and Orthodontics, College of Dentistry, Saudi Arabia
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Effects of enamel sealing on shear bond strength and the adhesive remnant index : Study of three fluoride-releasing adhesives in combination with metal and ceramic brackets. J Orofac Orthop 2016; 78:1-10. [PMID: 27896419 DOI: 10.1007/s00056-016-0065-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 06/27/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVES Selected combinations of materials were used to create tooth-adhesive-bracket complexes to evaluate shear bond strength (SBS) and the adhesive remnant index (ARI) with regard to enamel sealing. METHODS Four adhesive systems also appropriate for use as enamel sealants were combined with four bracket types, resulting in 16 adhesive-bracket combinations, each of which was tested on 15 permanent bovine incisors. Sealant-adhesives included two recently introduced fluoride-releasing systems (Riva bond LC® and go!®), one established primer (Opal® Seal™), and one commonly used adhesive as control (Transbond™ XT). Brackets included two metal (discovery® by Dentaurum and Sprint®) and two ceramic (discovery® pearl and GLAM®) systems. After embedding the bovine teeth, bonding the brackets to their surface, and storing the resultant samples as per DIN 13990-2 with modifications, an SBS test was performed by applying the shear force directly at the bracket base in an incisocervical direction. Then the ARI scores were determined. RESULTS Discovery® + Transbond™ XT yielded the highest (47.2 MPa) and GLAM® + go!® the lowest (17.0 MPa) mean SBS values. Significant differences (p < 0.0001) were found between metal and ceramic brackets of the same manufacturers (Dentaurum and Forestadent). Our ratings of the failure modes upon debonding predominantly yielded ARI 0 or 1. The high SBS values and low ARI scores observed with discovery® + Transbond XT™ were reflected in a high rate of enamel fracture, which occurred on 11 of the 15 tooth specimens in this group. CONCLUSIONS All sealant-bracket combinations were found to yield levels of SBS adequate for clinical application. SBS values and ARI scores varied significantly depending on which sealant-brackets were used.
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Linjawi AI, Abbassy MA. Comparison of shear bond strength to clinically simulated debonding of orthodontic brackets: An in vitro study. J Orthod Sci 2016; 5:25-9. [PMID: 26998474 PMCID: PMC4778174 DOI: 10.4103/2278-0203.176655] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To assess in vitro the quantitative and qualitative debonding behavior of the AEZ debonding plier, compared to shear debonding force, in debonding orthodontic metal brackets. MATERIALS AND METHODS Thirty-two extracted premolars bonded with metal brackets were randomly divided into two equal groups according to the type of simulated debonding method; compressive bond strength (CBS) group using AEZ debonding plier (Ormco Corporation, USA) attached to the Instron machine, and shear bond strength (SBS) group using regular Instron attachments. All teeth were subjected to debonding forces, and debonding strength was assessed. The buccal surfaces were then examined, under a stereomicroscope, and adhesive remnants were scored using adhesive remnant index (ARI). Debonding strengths comparison was performed using the independent sample t-test. ARI score comparison was performed using the Mann-Whitney U-test. Correlation between debonding strength and ARI scores was performed using the Spearman correlation. RESULTS There was no significant difference in mean debonding strength between the SBS (M = 6.17 ± 0.77 MPa) and CBS (M = 6.68 ± 1.67 MPa) groups (P > 0.05). The CBS group showed significantly less adhesive remnants than the SBS group (P < 0.05); 62.5% of CBS group had ARI score 1, whereas 68.8% of SBS group had ARI score 3. No significant correlation between ARI and debonding strength was found (P < 0.05). CONCLUSION SBS was found to produce similar debonding strength to the AEZ debonding plier in vitro. However, the AEZ debonding plier resulted in less adhesive remnant which is of great advantage for reducing chair-time during cleanup after debonding brackets.
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Affiliation(s)
- Amal Ibrahim Linjawi
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah 21381, Saudi Arabia
| | - Mona A Abbassy
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah 21381, Saudi Arabia; Alexandria University, Alexandria, Egypt
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Schnebel B, Mateer S, Maganzini AL, Freeman K. Clinical acceptability of two self-etch adhesive resins for the bonding of orthodontic brackets to enamel. J Orthod 2014; 39:256-61. [DOI: 10.1179/1465312512z.00000000038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Mews L, Kern M, Ciesielski R, Fischer-Brandies H, Koos B. Shear bond strength of orthodontic brackets to enamel after application of a caries infiltrant. Angle Orthod 2014; 85:645-50. [PMID: 25157972 DOI: 10.2319/013014-82.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To examine differences in the shear bond strength of orthodontic brackets on differently mineralized enamel surfaces after applying a caries infiltrant or conventional adhesive. MATERIALS AND METHODS A total of 320 bovine incisors were assigned to eight pretreated groups, and the shear force required for debonding was recorded. Residual adhesive was evaluated by light microscopy using the adhesive remnant index. Statistical analysis included Kolmogorov-Smirnov, analysis of variance (ANOVA), and Scheffé tests. RESULTS The highest bond strength (18.8 ± 4.4 MPa) was obtained after use of the caries infiltrant. More residual adhesive and fewer enamel defects were observed on infiltrated enamel surfaces. Brackets on demineralized enamel produced multiple enamel defects. CONCLUSIONS Acceptable bond strengths were obtained with all material combinations. A caries-infiltrant applied before bracket fixation has a protective effect, especially on demineralized enamel.
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Affiliation(s)
- Laura Mews
- a Postdoctoral student, Department of Orthodontics, Christian-Albrechts University, Kiel, Germany
| | - Matthias Kern
- b Professor and Chair, Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University, Kiel, Germany
| | - Robert Ciesielski
- c Research Assistant, Department of Orthodontics, Christian-Albrechts University, Kiel, Germany
| | - Helge Fischer-Brandies
- d Professor and Chair, Department of Orthodontics, Christian-Albrechts University, Kiel, Germany
| | - Bernd Koos
- e Assistant Professor, Department of Orthodontics, Christian-Albrechts University, Kiel, Germany
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Holberg C, Rudzki-Janson I, Wichelhaus A, Winterhalder P. Periodontal ligament strain induced by different orthodontic bracket removal techniques: nonlinear finite-element comparison study. J Orofac Orthop 2014; 75:287-98. [PMID: 25052508 DOI: 10.1007/s00056-014-0219-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 11/05/2013] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The goal of this work was to biomechanically analyze several different methods of bracket debonding and compare the strain they induce in the periodontal ligament (PDL). METHODS The CT dataset of an anatomical specimen was divided into four segmental models of the mandible. Each model covered one tooth (32, 42, 44, and 47). One of these teeth (32) was characterized by marked loss of periodontal attachment. After suitable finite-element models were generated, material properties were defined as nonlinear for PDL and anisotropic for the alveolar bone. This was followed by simulating four bracket debonding techniques: frontal and lateral torquing, bracket-wing compression, and shear stress applied with specially designed pliers. RESULTS The greatest strain was measured at the periodontally compromised tooth site 32 in response to frontal and lateral torquing. Both techniques also resulted in great strain around the other three teeth. Strain was markedly lower with the shear technique and virtually negligible with the compression technique. All simulated tooth sites confirmed the PDL-sparing effect of bracket-wing compression. CONCLUSION The severity of PDL strain during orthodontic bracket removal depends on the debonding method used. The technique of compressing the bracket wings appears to trigger the smallest effect on PDL. Clinical studies should be undertaken to confirm these findings.
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Affiliation(s)
- Christof Holberg
- Faculty of Medicine, Ludwig-Maximilians-University, Geschwister-Scholl-Platz 1, 80539, Munich, Germany,
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Jatania A, Shivalinga BM. An in vitro study to evaluate the effects of addition of zinc oxide to an orthodontic bonding agent. Eur J Dent 2014; 8:112-117. [PMID: 24966757 PMCID: PMC4054022 DOI: 10.4103/1305-7456.126262] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective: The objective of this study is to test the antimicrobial effect of zinc oxide when incorporated into an orthodontic bonding material and to check the effect of addition of zinc oxide on the shear bond strength of the bonding material. Materials and Methods: Zinc oxide was added to a resin modified light cure glass ionomer cement (GIC) (Fuji Ortho LC GC America, Alsip, Ill) to make modified bonding agent containing 13% and 23.1% ZnO and the antimicrobial assay was done using agar disc diffusion method. Discs of the modified bonding agent were prepared and a culture of Streptococcus mutans mixed with soft agar was poured over it and incubated at 38°C for 48 h and zones of inhibition were measured. The test was repeated after a month to check the antimicrobial effect. In addition shear bond strength of the brackets bonded with the modified bonding agent was tested. Results: The agar disc showed zones of inhibition around the modified bonding agent and the antimicrobial activity was more when the concentration of ZnO was increased. The antimicrobial effect was present even after a month. The shear bond strength decreased as the concentration of ZnO increased. Conclusion: The incorporation of ZnO into a resin modified light cure GIC (Fuji Ortho LC GC America, Alsip, Ill) added antimicrobial property to the original compound.
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Affiliation(s)
- Archana Jatania
- Department of Orthodontics, Saraswati Dhanwantri Dental College, Parbhani, Maharashtra, India
| | - B M Shivalinga
- Department of Orthodontics, JSS Dental College and Hospital, Mysore, Karnataka, India
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Papakonstantinou AE, Eliades T, Cellesi F, Watts DC, Silikas N. Evaluation of UDMA's potential as a substitute for Bis-GMA in orthodontic adhesives. Dent Mater 2013; 29:898-905. [PMID: 23787036 DOI: 10.1016/j.dental.2013.05.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 05/22/2013] [Accepted: 05/22/2013] [Indexed: 01/21/2023]
Abstract
OBJECTIVES To investigate the effect of UDMA %, of a range of filled UDMA:TEGDMA resins, on viscosity, degree of conversion and shear bond strength. Furthermore, to compare between model filled and unfilled UDMA adhesives, and clinically used orthodontic adhesives on these properties. METHODS Four filled and four unfilled resins with a UDMA to TEGDMA weight ratio 50:50, 60:40, 70:30, 80:20 were formulated, tested and compared to the Bis-GMA control Transbond XT. The properties investigated were: viscosity (rotational viscometry), degree of conversion (DC) (FT-IR) and bond strength (shear bond strength test). One-way ANOVA and Tukey post hoc test was used to statistically analyze the data for viscosity and DC% while the non-parametric Kruskal-Wallis and Mann-Whitney U-test was used for the shear bond strength values. RESULTS For SBS a comparable bond strength was obtained between the U80:T20(F) adhesive and the control Transbond XT (27.1 and 30.1 respectively). There was no significant difference between the U70:T30 adhesive and the control. Transbond XT (43.1%) had a significantly lower DC% than all the UDMA based adhesives. Furthermore, there was no significant difference between the DC% means of the various UDMA resins. There was a significant decrease in the viscosity for both filled and unfilled groups, as the TEGDMA concentration was increased. SIGNIFICANCE The results indicate that adhesives formulated with UDMA and TEGDMA monomers, could produce resins with comparable viscosities to the Bis-GMA control, Transbond XT. Adhesives formulated with high UDMA %, can be used to produce resins with greater viscosity and increased bond strength, potentially without affecting their degree of conversion.
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Effet du microsablage de l’émail vestibulaire et lingual sur la résistance au cisaillement d’attaches orthodontiques collées avec un primaire automordançant. Int Orthod 2012. [DOI: 10.1016/j.ortho.2012.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Mati M, Amm E, Bouserhal J, Bassil-Nassif N. Effects of buccal and lingual enamel sandblasting on shear bond strength of orthodontic brackets bonded with a self-etching primer. Int Orthod 2012; 10:422-31. [PMID: 23142141 DOI: 10.1016/j.ortho.2012.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to evaluate the effects of sandblasting on the initial shear bond strength (SBS) and on the bracket/adhesive failure mode of orthodontic brackets bonded on buccal and lingual enamel using a self-etching primer (SEP). The brackets were bonded using a SEP and composite resin on the buccal and lingual surfaces of 30 premolars with intact enamel and 30 premolars pretreated by sandblasting with 50 μm aluminum-oxide. Student's paired t-test was used to compare the groups for differences in SBS and a multiple Chi(2) test was performed to compare the bond failure mode. It was shown that sandblasting increases significantly SBS of the SEP on the buccal surfaces but the increase on the lingual surfaces is not statistically significant. A comparison of the adhesive remnant index scores indicated that there was more residual adhesive remaining on the teeth that were treated by sandblasting than on the teeth with intact enamel. Besides, there is no statistical difference between SBS of the SEP on buccal and lingual surfaces with intact enamel. Therefore, we can conclude that sandblasting improves the bond between buccal and lingual enamel and resin ant that the SEP provides the same SBS on buccal and lingual intact surfaces.
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Scougall-Vilchis RJ, Gonzalez-Lopez BS, Contreras-Bulnes R, Rodriguez-Vilchis LE, Garcia-Niño de Rivera MW, Kubodera-Ito T. Influence of four systems for dental bleaching on the bond strength of orthodontic brackets. Angle Orthod 2011; 81:700-6. [PMID: 21299411 DOI: 10.2319/100510-587.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To compare the influence of four systems for dental bleaching on the shear bond strength (SBS) of orthodontic brackets. MATERIALS AND METHODS One-hundred and fifty freshly extracted bovine teeth were randomly divided into five groups. In group I the teeth were untreated (control). In the remaining groups the teeth were bleached, as follows: group II: 38% hydrogen peroxide; group III: 10% carbamide peroxide; group IV: resin-based coating material (RBCM), Beauty Coat; and group V: RBCM, White Coat. In all groups the enamel was conditioned with a self-etching primer and brackets were bonded with composite resin. Samples were stored (37°C, 24 hours), tested, and statistically analyzed, with significance predetermined at P ≤ .05. The adhesive remnant index (ARI) was also evaluated and analyzed. RESULTS The SBS of group V (22.49 ± 5.34 MPa) was significantly higher than that of all other groups (I: 17.1 ± 5.11 MPa; II: 14.72 ± 5.42 MPa; III: 12.04 ± 5.29 MPa; and IV: 18.23 ± 5.58 MPa). In contrast, the SBS of group III was significantly lower than that of all groups (except group II). Significant differences in the ARI scores were present between groups. CONCLUSIONS The use of RBCM for dental bleaching before bonding orthodontic brackets did not reduce the SBS. In contrast, hydrogen and carbamide peroxides negatively affected the SBS. The SBS yielded after bleaching with carbamide peroxide was significantly lower.
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Oztas E, Bagdelen G, Kilicoglu H, Ulukapi H, Aydin I. The effect of enamel bleaching on the shear bond strengths of metal and ceramic brackets. Eur J Orthod 2011; 34:232-7. [DOI: 10.1093/ejo/cjq193] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Shahabi M, Heravi F, Mokhber N, Karamad R, Bishara SE. Effects on shear bond strength and the enamel surface with an enamel bonding agent. Am J Orthod Dentofacial Orthop 2010; 137:375-8. [DOI: 10.1016/j.ajodo.2008.03.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2007] [Revised: 03/01/2008] [Accepted: 03/01/2008] [Indexed: 11/16/2022]
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Gittner R, Müller-Hartwich R, Jost-Brinkmann PG. Influence of Various Storage Media on Shear Bond Strength and Enamel Fracture When Debonding Ceramic Brackets: An In Vitro Study. Semin Orthod 2010. [DOI: 10.1053/j.sodo.2009.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Pseiner BC, Freudenthaler J, Jonke E, Bantleon HP. Shear bond strength of fluoride-releasing orthodontic bonding and composite materials. Eur J Orthod 2010; 32:268-73. [PMID: 20080958 DOI: 10.1093/ejo/cjp116] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Several fluoride-releasing bonding materials are available for orthodontic bracket placement. These are supposed to prevent white spot lesions during therapy. The objectives of this in vitro study were to evaluate the shear bond strength (SBS) and failure mode of a recently introduced fluoride-releasing adhesive, as well as the comparison with established orthodontic adhesives. Sixty bovine mandibular incisors were randomly allocated to three groups (n = 20): stainless steel brackets were bonded with Transbond Plus Color Change Adhesive, Transbond XT, or Light Bond. A universal testing machine was used to determine the SBS at a crosshead speed of 1 mm/minute. After debonding, the adhesive remnant index (ARI) was used to assess the adhesive remaining on the brackets. One-way analysis of variance comparing the three experimental groups showed no differences between the bonding systems for mean SBS (P = 0.27). ARI scores showed more residual adhesive on the teeth bonded with the Transbond systems (P < 0.01). As the fluoride-releasing bonding system provided sufficient mean bond strength in vitro (19.9 MPa), it may be used as an additional prophylactic measure in orthodontic therapy. However, the clinical effectiveness of its fluoride release may be questionable, as the amount of fluoride required from a bonding material to be caries preventive is still unknown.
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Affiliation(s)
- Bernhard Christian Pseiner
- Department of Orthodontics, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
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Spencer CG, Campbell PM, Buschang PH, Cai J, Honeyman AL. Antimicrobial Effects of Zinc Oxide in an Orthodontic Bonding Agent. Angle Orthod 2009; 79:317-22. [DOI: 10.2319/011408-19.1] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2008] [Accepted: 04/01/2008] [Indexed: 11/23/2022] Open
Abstract
Abstract
Objective: To test the null hypothesis that the addition of zinc oxide (ZnO) has no effect on the antimicrobial benefits and shear bond strength of a light-cured resin-modified glass ionomer.
Materials and Methods: ZnO was added to Fuji Ortho LC to create mixtures of 13% ZnO and 23.1% ZnO. Specimen discs of the modified bonding agent were incubated with Streptococcus mutans for 48 hours in a disc diffusion assay that was used to measure zones of bacterial inhibition. In addition, brackets were bonded to bovine deciduous incisors with the modified bonding agents, and shear bond strength was evaluated with a universal testing machine.
Results: The modified samples showed that antimicrobial activity increased as the concentration of ZnO increased. There were significant differences (P < .05) in antimicrobial activity. Post hoc tests showed that the antibacterial effects were 1.6 times greater with 23.1% ZnO than with 13% ZnO. There was no difference between Transbond and 0% ZnO (the negative control). After 1 month of daily rinsing, the antibacterial effects of 23.1% ZnO and 13% ZnO decreased 65% and 77%, respectively, but both maintained significant effects over the negative controls. There were no significant differences (P = .055) in shear bond strength between any of the mixture comparisons.
Conclusions: The incorporation of ZnO into Fuji Ortho LC added antimicrobial properties to the original compound without significantly altering the shear bond strength. ZnO holds potential for preventing decalcification associated with orthodontic treatment.
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Affiliation(s)
| | - Phillip M. Campbell
- b Clinic Director, Department of Orthodontics, Baylor College of Dentistry, Dallas, Tex
| | - Peter H. Buschang
- c Professor, Department of Orthodontics, Baylor College of Dentistry, Dallas, Tex
| | - John Cai
- d Assistant Professor, Department of Biomaterials, Department of Orthodontics, Baylor College of Dentistry, Dallas, Tex
| | - Allen L. Honeyman
- e Assistant Professor, Department of Biomedical Sciences, Baylor College of Dentistry, Dallas, Tex
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Schmidlin PR, Schätzle M, Fischer J, Attin T. Bonding of brackets using a caries-protective adhesive patch. J Dent 2008; 36:125-9. [DOI: 10.1016/j.jdent.2007.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2007] [Revised: 10/26/2007] [Accepted: 11/03/2007] [Indexed: 10/22/2022] Open
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Karan S, Büyükyilmaz T, Toroğlu MS. Orthodontic bonding to several ceramic surfaces: are there acceptable alternatives to conventional methods? Am J Orthod Dentofacial Orthop 2007; 132:144.e7-14. [PMID: 17693362 DOI: 10.1016/j.ajodo.2006.12.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2006] [Revised: 12/27/2006] [Accepted: 12/29/2006] [Indexed: 10/23/2022]
Abstract
INTRODUCTION The objectives of this study were to determine the effects of various surface conditioning methods on 3 types of ceramic materials (feldsphatic, leucite-based, and lithia disilicate-based) in orthodontic bonding. METHODS A total of 210 ceramic disk samples were fabricated and divided into 3 groups. In each group, 5 subgroups were prepared by sandblasting; sandblasting and hydrofluoric (HF) acid; sandblasting and silane; sandblasting, HF acid, and silane; and tribochemical silica coating and silane. Mandibular incisor brackets were bonded with light-cured adhesive. The samples were stored in water for 24 hours at 37 degrees C and then thermocycled. Shear bond tests were performed, and the failure types were classified with adhesive remnant index scores. RESULTS In all 3 ceramic groups, the lowest shear bond strength values were found in the sandblasted-only samples. For the feldspathic and lithia disilicate-based ceramic, the highest bond strength values were obtained with silica coating (15.2 and 13.2 MPa, respectively). For the leucite-based ceramic, HF without silane produced the highest bond strength value (14.7 MPa), but comparable values were obtained with silicatization also (13.4 MPa). CONCLUSIONS The silica-coating technique could replace the other conditioning techniques in bonding brackets to ceramic. However, debonding must be done carefully because of the risk of porcelain fracture.
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Affiliation(s)
- Sevinc Karan
- Department of Orthodontics, Faculty of Dentistry, Cukurova University, Adana, Turkey.
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Scougall Vilchis RJ, Yamamoto S, Kitai N, Hotta M, Yamamoto K. Shear Bond Strength of a New Fluoride-releasing Orthodontic Adhesive. Dent Mater J 2007; 26:45-51. [PMID: 17410892 DOI: 10.4012/dmj.26.45] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the shear bond strength of stainless steel brackets bonded to enamel with a new fluoride-releasing orthodontic adhesive system. A total of 140 extracted human bicuspids were randomly divided into four groups. Group I (Transbond XT) was a control group in which enamel was etched with phosphoric acid. For the remaining groups, enamel was conditioned with a self-etching primer (SEP): Group II (Transbond Plus), Group III (BeautyOrtho Bond), and Group IV (BeautyOrtho Bond + Salivatect). Stainless steel brackets were bonded to all tooth samples. After which, the samples were stored, thermocycled, tested, and statistically analyzed. Besides bond strength evaluation, the adhesive remnant index (ARI) was also evaluated. The shear bond strengths of Groups II, III, and IV were significantly lower than Group I, and Group II was significantly greater than that of Group III. Concerning ARI scores, no significant differences were found between the groups. Further, no enamel fracture was observed during shear bond test with the new SEP. In conclusion, when enamel was conditioned with the new SEP, the mean values of shear bond strength yielded were lower than when it was etched with 37% phosphoric acid. Nonetheless, these mean values were higher than the average suggested by Reynolds as optimum for clinical treatment.
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Affiliation(s)
- Rogelio José Scougall Vilchis
- Department of Prosthodontics, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University, 1851 Hozumi, Mizuho City, Gifu 501-0296, Japan.
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Gibb AJ, Katona TR. A comparison of the shear-peel and third-order bond strengths of orthodontic brackets with 2 etch techniques and the role of bracket asymmetry. Am J Orthod Dentofacial Orthop 2006; 130:699.e1-7. [PMID: 17169729 DOI: 10.1016/j.ajodo.2006.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Revised: 06/22/2006] [Accepted: 07/17/2006] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Innovations in orthodontic bonding are inevitably followed by a flurry of studies to ascertain efficacy. Unfortunately, the published reports are often contradictory or highly variable. The primary purpose of this study was to analyze protocols that measure orthodontic bracket bond strength. The effects of loading mode and the role of bracket asymmetry were examined. The secondary goal was to test a self-etch enamel preparation system. MATERIALS AND METHODS Flattened stainless steel orthodontic brackets (.022-in Victory Series, 3M Unitek, Monrovia, Calif) were bonded to a total of 192 flattened bovine incisors with a resin composite bonding agent (Transbond XT, 3M Unitek.) The enamel was prepared with traditional, two-step (TS) acid (37% phosphoric acid gel) etching and priming (Transbond XT Primer, 3M Unitek) or with a single step (SS) self-etch (Transbond Plus, 3M Unitek) material. Cement thickness was held constant and bonding was done under controlled temperature and humidity. The brackets were debonded in the occlusogingival and in the gingivocclusal directions (ie, the 2 senses of shear-peel) and using a new technique in the buccal-root and in the lingual-root directions (ie, the 2 senses of a third-order moment.) RESULTS Data showed no significant differences between TS and SS regardless of load modality. However, significant differences were revealed between the senses of debonding, indicating bracket asymmetry effects. CONCLUSIONS The wide clinical use of these newer self-etching primers has been supported by these limited findings. A new third-order debonding protocol has been demonstrated to be a useful tool. Bracket asymmetry affects some bond strength values, and there is a need for standardization of testing protocols.
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Affiliation(s)
- Alan J Gibb
- School of Dentistry, Indiana University, and of Mechanical Engineering, School of Engineering and Technology, Purdue University, Indianapolis 46202, USA
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