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Shahin SY, AlQahtani N, Abushowmi TH, Siddiqui IA, Akhtar S, Nassar EA, Gad MM. The effect of surface treatment and thermal aging on the bonding of clear aligner attachments to provisional resin-based material: shear bond strength analysis. FRONTIERS IN ORAL HEALTH 2024; 5:1449833. [PMID: 39139446 PMCID: PMC11319265 DOI: 10.3389/froh.2024.1449833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2024] [Accepted: 07/15/2024] [Indexed: 08/15/2024] Open
Abstract
Objectives The aim of this study is to evaluate the effect of different surface treatments on the shear bond strength (SBS) of clear aligner attachments bonded to Bis-acryl provisional crowns. Methods 120 cylindrical bisacrylic composite material (ProTemp type) specimens were prepared and divided into six groups (n = 20) based on surface treatment, control: (no treatment); super coarse grit diamond bur, carbide bur, alumina-blasting, non-thermal plasma treatment, and Er:YAG laser treatment. The features of treated surfaces were examined using scanning electron microscopy (SEM). A flowable composite resin (Transbond XT; 3M Unitek) was bonded to the specimens forming the attachment. Half of specimens were subjected to thermal cycling (5,000 cycles). SBS was measured before and after thermal cycling. Each specimen was loaded at the attachment/resin interface at a speed of 0.5 mm/min until failure. The nature of the failure was analyzed using the composite remnants index (CRI). Two-way ANOVA and Tukey HSD were used for data analysis α = 0.5. For CRI scores analysis, Kruskal-Wallis test and Dunn's multiple comparison were used as post-hoc test. Results SEM analysis showed that all surface treatments altered surface properties and increase surface bonding area. The specimens treated with plasma, Er:YAG laser, and alumina-blasting had higher SBS values before and after thermal cycling. In comparison to control plasma, Er:YAG laser, and alumina-blasting showed a significant increase in SBS (P < 0.001) while carbide and diamond bur groups showed no significant differences (P > 0.05). Thermal cycling significantly decreased the SBS of control, carbide bur, diamond bur, and Er:YAG laser while no significant effect of alumina-blasting and plasma group. Er:YAG laser and plasma groups significantly exhibited more dominance for scores 2 and score 3 and the absence of score 0. Conclusion Alumina-blasting, Er:YAG laser, or non-thermal plasma surface treatments increased the shear bond strength between clear aligner attachments and resin-based restorations.
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Affiliation(s)
- Suliman Y. Shahin
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Norah AlQahtani
- College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Tahani H. Abushowmi
- Fellowship Program in Prosthodontics, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Intisar A. Siddiqui
- Department of Dental Education, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Sultan Akhtar
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Essam A. Nassar
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mohammed M. Gad
- Fellowship Program in Prosthodontics, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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Alijani S, Fotovat F, Rezaei Soufi L, Alafchi B, Mohammadkhani MH. Shear bond strength of orthodontic brackets to specimens fabricated from temporary restorative materials by 3D-printing, CAD/CAM technology, and the conventional technique after surface treatment by sandblasting and laser. Int Orthod 2023; 21:100790. [PMID: 37421919 DOI: 10.1016/j.ortho.2023.100790] [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] [Received: 04/26/2023] [Revised: 06/12/2023] [Accepted: 06/23/2023] [Indexed: 07/10/2023]
Abstract
OBJECTIVES This study assessed the shear bond strength (SBS) of stainless steel (SS) orthodontic brackets to specimens fabricated from polymethyl methacrylate (PMMA) temporary restorative material by 3D-printing, computer-aided design/computer-aided manufacturing (CAD/CAM) technology, and the conventional technique, after surface treatment by sandblasting and laser. MATERIAL AND METHODS In this in vitro study, 60 disc-shaped specimens with 8mm diameter and 1mm height were fabricated from PMMA temporary restorative material by 3D-printing, CAD/CAM, and the conventional technique. In each group (n=20), half of the specimens were sandblasted while the other half underwent Er,Cr:YSGG laser irradiation. Brackets were bonded to the specimens and underwent thermocycling followed by SBS testing. Data were analysed by one-way ANOVA, independent t-test, and LSD test (alpha=0.05). RESULTS A significant difference existed among the three fabrication methods in SBS in both laser (P<0.001) and sandblasting (P<0.001) surface treatment groups. In laser group, the mean SBS of CAD/CAM (P=0.000) and conventional (P=0.000) groups was significantly lower than that of 3D-printing group. In sandblasting group, the SBS of CAD/CAM group was significantly lower than 3D-printing (P=0.000) and conventional (P=0.000) groups. The mean SBS of laser-treated specimens was significantly higher than sandblasted specimens in 3D-printing group (P=0.000), and significantly lower than sandblasted specimens in the conventional group (P=0.000). A significantly higher SBS was obtained by laser treatment compared with sandblasting irrespective of the fabrication method (P=0.000). CONCLUSION The highest SBS of SS orthodontic brackets to temporary restorative material was recorded for 3D-printed specimens treated by Er,Cr:YSGG laser irradiation.
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Affiliation(s)
- Sara Alijani
- Department of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Farnoush Fotovat
- Department of Prosthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Loghman Rezaei Soufi
- Department of Restorative Dentistry, Dental Research Center, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Behnaz Alafchi
- Modeling of Noncommunicable Diseases Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
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Haralur SB, Alqahtani AM, Shiban AS, Alattaf ZM, Chaturvedi S, AlQahtani SM, Alqahtani NM. Influence of different surface treatment on bonding of metal and ceramic Orthodontic Brackets to CAD-CAM all ceramic materials. BMC Oral Health 2023; 23:564. [PMID: 37574557 PMCID: PMC10423419 DOI: 10.1186/s12903-023-03246-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 07/21/2023] [Indexed: 08/15/2023] Open
Abstract
BACKGROUND Developing efficient bonding techniques for orthodontic brackets and all-ceramic materials continues to pose a clinical difficulty. This study aimed to evaluate the shear bond strengths (SBS) of metal and ceramic brackets to various all-ceramic CAD-CAM materials, such as lithium disilicate CAD (LDS-CAD), polymer-infiltrated ceramic (PIC), zirconia-reinforced lithium silicate glass ceramic (ZLS), and 5YTZP zirconia after different surface treatments and thermal cycling. MATERIALS AND METHODS The samples were divided into two groups to be bonded with ceramic and metal lower incisor brackets. Each group was subdivided into a control group devoid of any surface treatment, 10% HF acid (HFA) etching, ceramic etch & prime (MEP), Al2O3 air abrasion, and medium grit diamond bur roughening. After surface treatment, brackets were bonded with composite resin cement, thermal cycled, and tested for shear bond strength. The failed surfaces were evaluated with a digital microscope to analyse the type of failure. The data were statistically analysed using a one-way ANOVA and Tukey HSD tests at p < 0.05. RESULTS The highest mean bond strengths were found with HFA etching in LDS-CAD (13.17 ± 0.26 MPa) and ZLS (12.85 0.52 MPa). Diamond bur recorded the lowest mean bond strength roughening across all the ceramic groups. There were significant differences in mean shear bond values per surface treatment (p < 0.001) and ceramic materials. CONCLUSION Among the surface treatment protocols evaluated, HFA etching and MEP surface treatment resulted in enhanced bond strength of both ceramic and metal brackets to CAD-CAM all ceramic materials.
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Affiliation(s)
- Satheesh B Haralur
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, 62529, Saudi Arabia.
| | | | - Abdullah Saeed Shiban
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, 62529, Saudi Arabia
| | | | - Saurabh Chaturvedi
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, 62529, Saudi Arabia
| | - Saeed M AlQahtani
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, 62529, Saudi Arabia
| | - Nasser M Alqahtani
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, 62529, Saudi Arabia
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Kedia NB, Bangar B, Rao SJ, Swarup S, Singh D, Chikhalia DK. Bond Strength of Orthodontic Brackets to Temporary Crowns: In vitro Effects of Surface Treatment. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2023; 15:S1013-S1015. [PMID: 37694056 PMCID: PMC10485540 DOI: 10.4103/jpbs.jpbs_248_23] [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: 03/13/2023] [Revised: 03/14/2023] [Accepted: 03/14/2023] [Indexed: 09/12/2023] Open
Abstract
Background To evaluate bond strength of orthodontic brackets to temporary crowns. Materials and Methods A bis-acrylic composite was used to create a total of 25 discs, which were then divided into five groups based on how their surfaces were treated with black, blue, green, and sandblasted diamond burs, in addition to a control group. Software called SPSS was used to analyze the outcome. Results The average pressures measured for the green bur, black bur, and sandblasting, respectively, were 12.05 MPa, 12.87 MPa, and 19.25 MPa. Comparing the control and blue groups, a substantial variation in shear bond strength was only noticed with reference to sandblasting. Conclusion The binding strength of orthodontic brackets is increased by sandblasting temporary crowns.
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Affiliation(s)
- Neal B. Kedia
- Department of Orthodontia, Buddha Institute of Dental Sciences and Hospital, Patna, Bihar, India
| | - Bhushan Bangar
- Department of Prosthodontics, Maharashtra Institute of Dental Science and Research, Latur, Maharashtra, India
| | - Srerama Janardhana Rao
- Department of Dental Surgery, Government Medical College, Srikakulam, Andhra Pradesh, India
| | - Siddharth Swarup
- Department of Prosthodontics, Dr. D.Y. (Dnyandeo Yashwantrao) Patil, Vidyapeeth, Pimpri, Pune, Maharashtra, India
| | - Deepak Singh
- Department of Orthodontics and Dentofacial Orthopedics, Awadh Dental College and Hospital, Jamshedpur, Jharkhand, India
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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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Comparison of shear bond strength of metal orthodontic brackets bonded to a CAD/CAM prosthetic provisional material after the use of a self-adhesive resin cement versus a light adhesive paste and different surface conditioning protocols: An in vitro study. Int Orthod 2022; 20:100661. [DOI: 10.1016/j.ortho.2022.100661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/28/2022] [Accepted: 06/05/2022] [Indexed: 11/19/2022]
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Comparison of shear bond strength of orthodontic stainless-steel brackets on temporary crowns fabricated by three different methods: An in vitro study. Int Orthod 2022; 20:100641. [PMID: 35624022 DOI: 10.1016/j.ortho.2022.100641] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/26/2022] [Accepted: 04/29/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Different methods are available for making temporary restorations. The purpose of this study was to determine and compare the shear bond strength of orthodontic brackets on temporary crowns made by three different methods. MATERIALS AND METHODS In this experimental study, disc form samples (N=54) were made in dimensions 8×1mm, according to the manufacturer's instructions. In this study, we had three groups (N=18) based on manufacturing methods (3D printing, conventional, and CAD/CAM). Following surface preparation of the samples, the brackets were bonded in the centre of the discs. Before the shear bond strength test, the samples were subjected to the thermocycling process. The shear bond strength of brackets was measured by Universal Testing Machine. Data were analysed by one-way ANOVA and LSD post hoc test. RESULTS The findings indicated that the mean shear bond strength of orthodontic stainless-steel brackets on temporary crowns varied between CAD/CAM and 3D printing methods (P<0.001) and also between CAD/CAM and conventional methods (P<0.001). The mean shear bond strength of orthodontic stainless steel brackets on temporary crowns was not different between 3D printing and conventional methods (P=0.7). CONCLUSION The shear bond strength of orthodontic stainless-steel brackets bonded to temporary crowns fabricated by conventional and 3D printing methods was similar, and the shear bond strength in the samples fabricated by CAD/CAM method was lower than other specimens.
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Bond Strength of Orthodontic Brackets to Temporary Crowns: In Vitro Effects of Surface Treatment. Int J Dent 2021; 2021:9999933. [PMID: 34257661 PMCID: PMC8261172 DOI: 10.1155/2021/9999933] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 06/20/2021] [Indexed: 11/24/2022] Open
Abstract
Background The number of patients seeking orthodontic treatment has been consistently increasing. During orthodontic treatment, it is recommended to place the provisional restoration and to delay the final restoration until completion of orthodontic treatment. Recurrent bracket debonding necessitates orthodontists to prepare the bonding area with special measures. Objective This study aimed to evaluate the effect of different grit sizes of diamond burs and sandblasting surface treatment on the shear bond strength of orthodontic brackets to provisional crowns. Materials and Methods A total of 75 discs were fabricated from a bisacrylic composite and divided into 5 groups (n = 15) according to surface treatment by black, blue, and green diamond burs and sandblasting in addition to a control group. Metal orthodontic brackets were bonded to discs in a standardized conventional manner. All specimens were subjected to thermocycling with 5000 cycles of alternating 5°C and 55°C waterbaths. The shear bond strength test was performed using a universal testing machine. A scanning electron microscope (SEM) was used to analyze the surface treatment effect and features of debonded surfaces. The amount of composite resin left on the specimen surfaces was analyzed and classified with the adhesive remnant index. One-way ANOVA was performed at α = 0.05. Results The shear bond strength of specimens treated with sandblasting was significantly higher than that of the control group under thermal aging conditions (p=0.022), as well as blue burs (p=0.001), while no significant differences were found between different grit diamond burs and the controls (p > 0.05). Conclusion Under thermocycling conditions, sandblasting of provisional crowns increases the bond strength of orthodontic brackets.
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Garcés GA, Rojas VH, Bravo C, Sampaio CS. Shear bond strength evaluation of metallic brackets bonded to a CAD/CAM PMMA material compared to traditional prosthetic temporary materials: an in vitro study. Dental Press J Orthod 2020; 25:31-38. [PMID: 32844970 PMCID: PMC7437152 DOI: 10.1590/2177-6709.25.3.031-038.oar] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 07/06/2019] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Orthodontic treatment for adults is currently increasing, and therefore the need to bond brackets to restorations and temporary crowns. The use of CAD/CAM PMMA provisional restorations for orthodontic purposes have not yet been described, and there is currently insufficient information regarding the strength of bracket adhesion. OBJECTIVE This study aimed at evaluating the effects of thermocycling (TC) and surface treatment on shear bond strength (SBS) of brackets to different provisional materials. METHODS Forty specimens were made from each material [PMMA (Telio Lab), bis-acryl (Telio CS C&B), and PMMA CAD/CAM (Telio CAD)], sandpapered, and divided according to surface treatment (pumiced or sandblasted) and TC (half of the samples = 1,000 cycles, 5°C/55°C water baths) (n = 10/group). Stainless-steel brackets were bonded to the specimens (using Transbond XT), and SBS testing was performed. Data were analyzed by three-way ANOVA and LSD post-hoc tests (α = 0.05). Failure types were classified with adhesive remnant index (ARI) scores. RESULTS SBS values ranged from 1.5 to 14.9 MPa. Sandblasted bis-acryl and sandblasted auto-curing PMMA groups presented similar values (p> 0.05), higher than the CAD/CAM material (p< 0.05), with or without TC. When thermocycled, pumiced bis-acryl showed higher SBS than pumiced acrylic (p= 0.005) and CAD/CAM materials (p= 0.000), with statistical difference (p= 0.009). TC showed negative effect (p< 0.05) for sandblasted bis-acryl and pumiced acrylic groups. ARI predominant score was mostly zero (0) for CAD/CAM, 1 and 2 for bis-acryl, and 1 for acrylic groups. CONCLUSION In general, bis-acryl material showed the highest SBS values, followed by acrylic and CAD/CAM materials, which showed SBS values lower than an optimum strength for bonding brackets.
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Affiliation(s)
- Gonzalo Andrés Garcés
- Department of Biomaterials, Faculty of Dentistry, Universidad de Los Andes, Santiago, Chile
| | - Victor Hugo Rojas
- Department of Orthodontics, Faculty of Dentistry, Universidad de Los Andes, Santiago, Chile
| | - Cristian Bravo
- Department of Biomaterials, Faculty of Dentistry, Universidad de Los Andes, Santiago, Chile
| | - Camila S Sampaio
- Department of Biomaterials, Faculty of Dentistry, Universidad de Los Andes, Santiago, Chile
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Goracci C, Özcan M, Franchi L, Di Bello G, Louca C, Vichi A. Bracket bonding to polymethylmethacrylate-based materials for computer-aided design/manufacture of temporary restorations: Influence of mechanical treatment and chemical treatment with universal adhesives. Korean J Orthod 2019; 49:404-412. [PMID: 31815108 PMCID: PMC6883210 DOI: 10.4041/kjod.2019.49.6.404] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 09/03/2019] [Accepted: 09/09/2019] [Indexed: 11/10/2022] Open
Abstract
Objective To assess shear bond strength and failure mode (Adhesive Remnant Index, ARI) of orthodontic brackets bonded to polymethylmethacrylate (PMMA) blocks for computer-aided design/manufacture (CAD/CAM) fabrication of temporary restorations, following substrate chemical or mechanical treatment. Methods Two types of PMMA blocks were tested: CAD-Temp® (VITA) and Telio® CAD (Ivoclar-Vivadent). The substrate was roughened with 320-grit sandpaper, simulating a fine-grit diamond bur. Two universal adhesives, Scotchbond Universal Adhesive (SU) and Assure Plus (AP), and a conventional adhesive, Transbond XT Primer (XTP; control), were used in combination with Transbond XT Paste to bond the brackets. Six experimental groups were formed: (1) CADTemp®/SU; (2) CAD-Temp®/AP; (3) CAD-Temp®/XTP; (4) Telio® CAD/SU; (5) Telio® CAD/AP; (6) Telio® CAD/XTP. Shear bond strength and ARI were assessed. On 1 extra block for each PMMA-based material surfaces were roughened with 180-grit sandpaper, simulating a normal/medium-grit (100 mm) diamond bur, and brackets were bonded. Shear bond strengths and ARI scores were compared with those of groups 3, 6. Results On CAD-Temp® significantly higher bracket bond strengths than on Telio® CAD were recorded. With XTP significantly lower levels of adhesion were reached than using SU or AP. Roughening with a coarser bur resulted in a significant increase in adhesion. Conclusions Bracket bonding to CAD/CAM PMMA can be promoted by grinding the substrate with a normal/medium-grit bur or by coating the intact surface with universal adhesives. With appropriate pretreatments, bracket adhesion to CAD/CAM PMMA temporary restorations can be enhanced to clinically satisfactory levels.
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Affiliation(s)
- Cecilia Goracci
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Mutlu Özcan
- Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, University of Zurich, Zurich, Switzerland
| | - Lorenzo Franchi
- Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - Giuseppe Di Bello
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Chris Louca
- University of Portsmouth Dental Academy, Portsmouth, United Kingdom
| | - Alessandro Vichi
- University of Portsmouth Dental Academy, Portsmouth, United Kingdom
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Cumerlato M, Lima EMD, Osorio LB, Mota EG, Menezes LMD, Rizzatto SMD. Effect of surface treatment of prefabricated teeth on shear bond strength of orthodontic brackets. Dental Press J Orthod 2018; 22:47-52. [PMID: 28902249 PMCID: PMC5573010 DOI: 10.1590/2177-6709.22.4.047-052.oar] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 01/10/2017] [Indexed: 12/05/2022] Open
Abstract
Objective: The aim of this in vitro study was to evaluate and compare the effects of grinding, drilling, sandblasting, and ageing prefabricated teeth (PfT) on the shear bond strength (SBS) of orthodontic brackets, as well as the effects of surface treatments on the adhesive remnant index (ARI). Methods: One-hundred-ninety-two PfT were divided into four groups (n = 48): Group 1, no surface treatment was done; Group 2, grinding was performed with a cylindrical diamond bur; Group 3, two drillings were done with a spherical diamond bur; Group 4, sandblasting was performed with 50-µm aluminum oxide. Before the experiment, half of the samples stayed immersed in distilled water at 37oC for 90 days. Brackets were bonded with Transbond XT and shear strength tests were carried out using a universal testing machine. SBS were compared by surface treatment and by ageing with two-way ANOVA, followed by Tukey’s test. ARI scores were compared between surface treatments with Kruskal-Wallis test followed by Dunn’s test. Results: Surface treatments on PfT enhanced SBS of brackets (p< 0.01), result not observed with ageing (p= 0.45). Groups II, III, and IV showed higher SBS and greater ARI than the Group 1 (p< 0.05). SBS was greater in the groups 3 and 4 (drilling, sandblasting) than in the Group 2 (grinding) (p< 0.05). SBS and ARI showed a positive correlation (Spearman’s R2= 0.57; p< 0.05). Conclusion: Surface treatment on PfT enhanced SBS of brackets, however ageing did not show any relevance. Sandblasting and drilling showed greater SBS than grinding. There was a positive correlation between SBS and ARI.
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Affiliation(s)
- Marina Cumerlato
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia (Porto Alegre/RS, Brasil)
| | - Eduardo Martinelli de Lima
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Ortodontia (Porto Alegre/RS, Brasil)
| | - Leandro Berni Osorio
- Universidade Federal de Santa Maria, Faculdade de Odontologia, Departamento de Estomatologia (Santa Maria/RS, Brasil)
| | - Eduardo Gonçalves Mota
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Materiais Dentários (Porto Alegre/RS, Brasil)
| | - Luciane Macedo de Menezes
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Ortodontia (Porto Alegre/RS, Brasil)
| | - Susana Maria Deon Rizzatto
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Ortodontia (Porto Alegre/RS, Brasil)
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Wan Abdul Razak WS, Sherriff M, Bister D, Seehra J. Bond strength of stainless steel orthodontic brackets bonded to prefabricated acrylic teeth. J Orthod 2017; 44:105-109. [PMID: 28300497 DOI: 10.1080/14653125.2017.1296636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVES The purpose of this in-vitro study was to evaluate the force to debond stainless steel orthodontic brackets bonded to acrylic teeth using different combinations of adhesive and surface treatments. MATERIALS AND METHODS One hundred prefabricated upper lateral incisor acrylic teeth were divided into 4 equal groups: Transbond XT® adhesive only (Group 1, control), Transbond XT® adhesive with sandblasting (Group 2), Transbond XT® adhesive with abrasion / + methyl methacrylate (MMA) (Group 3) and Triad® Gel only (Group 4). The force in Newtons (N) to debond the brackets was measured. One-way analysis of variance (ANOVA) and pairwise multi-comparison of means (Šidak's adjustment) were undertaken. RESULTS The highest force to debond was recorded for Group 2 (275.7 N; SD 89.0) followed by Group 3 (241.9 N; SD 76.0), Group 1 (142.7 N; SD 36.7) and Group 4 (67.9 N; SD 21.1). Significant differences in bond strength measurements between the experimental groups were detected. Mean force values for the groups revealed no significant differences between Group 2 and Group 3 (p>0.05). CONCLUSIONS Both sandblasting and surface abrasion/+ application of methyl methacrylate (MMA) in combination with Transbond XT® adhesive are recommended for bonding stainless orthodontic brackets to acrylic teeth.
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Affiliation(s)
- Wan Salbiah Wan Abdul Razak
- a Department of Orthodontics , King's College London Dental Institute, Floor 22, Guy's Hospital, Guy's and St Thomas NHS Foundation Trust , London , UK
| | - Martyn Sherriff
- b School of Oral and Dental Sciences, Bristol Dental Hospital, University of Bristol and Kings College London Dental Institute, Guy's and St Thomas NHS Foundation Trust , London , WC2R 2LS , United Kingdom.,c Kings College London Dental Institute at Guy's, King's College and St Thomas' Hospitals , London , UK
| | - Dirk Bister
- a Department of Orthodontics , King's College London Dental Institute, Floor 22, Guy's Hospital, Guy's and St Thomas NHS Foundation Trust , London , UK
| | - Jadbinder Seehra
- a Department of Orthodontics , King's College London Dental Institute, Floor 22, Guy's Hospital, Guy's and St Thomas NHS Foundation Trust , London , UK
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