1
|
Paik Y, Kim JH, Yoo KH, Yoon SY, Kim YI. Dentin Biomodification with Flavonoids and Calcium Phosphate Ion Clusters to Improve Dentin Bonding Stability. Materials (Basel) 2022; 15:1494. [PMID: 35208035 DOI: 10.3390/ma15041494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to evaluate the effects of flavonoids and calcium phosphate ion clusters (CPIC) on dentin bonding stability. Seven experimental solutions were synthesized using icaritin (ICT), fisetin (FIS), silibinin (SIB), CPIC, and combinations of one of three flavonoids and CPIC (ICT + C, FIS + C, SIB + C). The experimental solutions were applied to demineralized dentin prior to the application of a universal adhesive. A group without any experimental solution served as a control. Dentin specimens pretreated with the experimental solutions were assayed using Fourier transform infrared (FTIR) spectroscopy. The microtensile bond strength (µTBS) and nanoleakage were evaluated at 24 h and after 10,000 thermocycles. FIS and ICT + C showed significantly higher µTBS than the control group at 24 h. CPIC, ICT + C, FIS + C, and SIB + C showed significantly higher µTBS than the control group after thermocycling. After thermocycling, silver infiltration into the hybrid layer and interfacial gaps was more noticeable in the control group than in the other groups. The FTIR spectra revealed the formation of apatitic minerals in the demineralized dentin in the flavonoid and CPIC combination groups. The pretreatment of demineralized dentin with flavonoids and CPIC improved dentin bonding stability. The flavonoid and CPIC combinations preserved dentin bond strength.
Collapse
|
2
|
Vukelja J, Klarić Sever E, Sever I, Jukić Krmek S, Tarle Z. Effect of Conventional Adhesive Application or Co-Curing Technique on Dentin Bond Strength. Materials (Basel) 2021; 14:ma14247664. [PMID: 34947259 PMCID: PMC8709259 DOI: 10.3390/ma14247664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/18/2021] [Accepted: 12/08/2021] [Indexed: 11/16/2022]
Abstract
The aim of this in vitro study was to assess the effect of two different adhesive application methods on shear dentin bond strength (ISO 29022) using three various adhesive systems. A mid-coronal section of 77 intact third human molars with fully developed apices was made to create flat bonding substrates. The materials used in the study were Excite F (Ivoclar Vivadent), Prime&Bond Universal (Dentsply Sirona) and G-Premio Bond (GC). The application of each adhesion system was performed in two different ways. In the first group, the bonding agent was light cured immediately after the application (conventional method), while in the second group the adhesive and composite were cured concurrently (“co-curing” method). A total of 180 specimens were prepared (3 adhesives × 2 method of application × 30 specimens per experimental group), stored at 37 °C in distilled water and fractured in shear mode after 1 week. Statistical analysis was performed using ANOVA and Weibull statistics. The highest bond strength was obtained for Prime&Bond conventional (21.7 MPa), whilst the lowest bond strength was observed when co-curing was used (particularly, Excite F 12.2 MPa). The results showed a significant difference between conventional and co-curing methods in all materials. According to reliability analysis, the co-curing method diminished bond reliability. Different application techniques exhibit different bond strengths to dentin.
Collapse
Affiliation(s)
- Josipa Vukelja
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia; (E.K.S.); (S.J.K.); (Z.T.)
- Correspondence: ; Tel.: +38-598-183-8319
| | - Eva Klarić Sever
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia; (E.K.S.); (S.J.K.); (Z.T.)
| | | | - Silvana Jukić Krmek
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia; (E.K.S.); (S.J.K.); (Z.T.)
| | - Zrinka Tarle
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia; (E.K.S.); (S.J.K.); (Z.T.)
| |
Collapse
|
3
|
Yokoyama M, Takamizawa T, Tamura T, Namura Y, Tsujimoto A, Barkmeier WW, Latta MA, Miyazaki M. Influence of Different Application Methods on the Bonding Effectiveness of Universal Adhesives to Dentin in the Early Phase. J Adhes Dent 2021; 23:447-459. [PMID: 34549928 DOI: 10.3290/j.jad.b2000257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To investigate the changes in the dentin bond strengths of universal adhesives during the early phase and evaluate the effect of a double-layer adhesive application on the performance of the dentin bond. MATERIALS AND METHODS Three universal adhesives and a two-step self-etch adhesive were employed to ascertain the shear bond strengths (SBS) of specimens to bovine dentin with the use of the etch-and-rinse or self-etch mode. The specimens were further divided into two groups based on adhesive application in a single or a double layer. The bonded specimens were stored in distilled water at 37°C for 5 min or 1, 6, 12, or 24 h prior to SBS measurement and the adhesives' Knoop hardness number (KHN). RESULTS All the adhesives showed increased SBS with prolonged storage periods regardless of the adhesive layer (single or double) or etching mode. Most universal adhesives in the double adhesive layer groups showed significantly higher SBS than single adhesive layer groups for the same storage period. All the adhesives also showed increased KHN with increased storage period. CONCLUSION The SBS and KHN values of the adhesives increased with increasing storage duration over a 24-h period. Double adhesive layer application mediated increased dentin bond strength in the early phase.
Collapse
|
4
|
Par M, Tarle Z, Hickel R, Ilie N. Dentin Bond Strength of Experimental Composites Containing Bioactive Glass: Changes During Aging for up to 1 Year. J Adhes Dent 2019; 20:325-334. [PMID: 30206575 DOI: 10.3290/j.jad.a40992] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To investigate dentin bond strength of experimental composites based on a bis-GMA/TEG-DMA composite filled with a varying amount (0 to 40 wt%) of bioactive glass 45S5 (BG) at a total filler content of 70 wt%. MATERIALS AND METHODS Specimens for shear bond strength testing (diameter = 3.12 mm, height = 3 mm) were bonded to human dentin using a two-step self-etch adhesive and subjected to aging in water at 37°C for 1 week, 1 month, 3 months, 6 months, and 1 year. A total of 600 specimens were prepared (6 materials × 5 aging times × 20 specimens per experimental group). Bond strength was tested by loading specimens in a universal testing machine at a constant crosshead speed of 0.5 mm/min until fracture. Reliability analysis was performed using Weibull statistics. RESULTS Experimental composites with a low BG content (up to 5 wt%) showed dentin bond strength and reliability comparable to those of the commercial reference composite. A further increase in the BG amount diminished both bond strength and reliability. The bond strength decline was linearly dependent on the amount of BG when observed within each aging time. One-year aging in water caused no deterioration of bond strength, but diminished bond reliability. The reliability after 1-year aging was similar among all composites, including the commercial reference composite. CONCLUSION The variation in BG amount diminished the bond strength and reliability in a dose-dependent manner.
Collapse
|
5
|
Karatas O, Bayindir YZ. A comparison of dentin bond strength and degree of polymerization of bulk-fill and methacrylate-based flowable composites. J Conserv Dent 2018; 21:285-289. [PMID: 29899631 PMCID: PMC5977777 DOI: 10.4103/jcd.jcd_160_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Objective: This study aimed to evaluate the dentin bond strength and degree of polymerization of bulk-fill and methacrylate-based flowable composites. Materials and Methods: Dentin bond strength of composites was evaluated using the microtensile bond strength (μTBS) test. Five different composites were applied on flat dentin surfaces with self-etch and etch-and-rinse adhesives. Twenty microspecimens with a 1 mm2 cross-sectional area were prepared for each group (n = 20). The μTBS test was then applied. To measure the degree of polymerization of composites, eight cylindrical blocks were prepared (n = 8) from each composite. The surface microhardness of each composite was measured on the bottom and top surfaces, and a hardness ratio (HR) was calculated. Data were analyzed using one-way ANOVA and the Tukey's honestly significant difference test (α = 0.05). Results: According to the μTBS test results, the SDR Etch-and-Rinse group exhibited the highest dentin bonding strength and the Aelita self-etch group exhibited the lowest (P < 0.05). HR measurement showed that all composite groups had a sufficient degree of polymerization at a 2-mm thickness, while only the SDR and Xtra-Base groups had sufficient polymerization at a 4-mm thickness. Conclusions: Bulk-fill composite demonstrates an even higher degree of polymerization of methacrylate-based flowable composite when applied in a 4-mm thickness.
Collapse
Affiliation(s)
- Ozcan Karatas
- Department of Restorative Dentistry, Atatürk University, Erzurum, Turkey
| | | |
Collapse
|
6
|
Zhang K, Li F, Imazato S, Cheng L, Liu H, Arola DD, Bai Y, Xu HHK. Dual antibacterial agents of nano-silver and 12-methacryloyloxydodecylpyridinium bromide in dental adhesive to inhibit caries. J Biomed Mater Res B Appl Biomater 2013; 101:929-38. [PMID: 23529901 DOI: 10.1002/jbm.b.32898] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 12/31/2012] [Accepted: 01/08/2013] [Indexed: 11/07/2022]
Abstract
Dental resins containing 12-methacryloyloxydodecylpyridinium bromide (MDPB) showed potent antibacterial functions. Recent studies developed antibacterial resins containing nanoparticles of silver (NAg). The objectives of this study were to develop an adhesive containing dual agents of MDPB and NAg for the first time and to investigate the combined effects of antibacterial adhesive and primer on biofilm viability, metabolic activity, lactic acid, dentin bond strength, and fibroblast cytotoxicity. MDPB and NAg were incorporated into Scotchbond Multi-Purpose (SBMP) adhesive "A" and primer "P". Five systems were tested: SBMP adhesive A; A + MDPB; A+NAg; A + MDPB + NAg; P + MDPB + NAg together with A + MDPB + NAg. Dental plaque microcosm biofilms were cultured using mixed saliva from 10 donors. Metabolic activity, colony-forming units, and lactic acid production of biofilms were investigated. Human fibroblast cytotoxicity of bonding agents was determined. MDPB + NAg in adhesive/primer did not compromise dentin bond strength (p > 0.1). MDPB or NAg alone in adhesive substantially reduced the biofilm activities. Dual agents MDPB + NAg in adhesive significantly reduced the biofilm viability compared with each agent alone (p < 0.05). The greatest inhibition of biofilms was achieved when both adhesive and primer contained MDPB + NAg. Fibroblast viability of groups with dual antibacterial agents was similar to control using culture medium without resin eluents (p > 0.1). In conclusion, this study showed for the first time that the antibacterial potency of MDPB adhesive could be substantially enhanced via NAg. Adding MDPB + NAg into both primer and adhesive achieved the strongest antibiofilm efficacy. The dual agent (MDPB + NAg) method could have wide applicability to other adhesives, sealants, cements, and composites to inhibit biofilms and caries.
Collapse
Affiliation(s)
- Ke Zhang
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland School of Dentistry, Baltimore, Maryland 21201, USA
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Melo MAS, Cheng L, Zhang K, Weir MD, Rodrigues LKA, Xu HHK. Novel dental adhesives containing nanoparticles of silver and amorphous calcium phosphate. Dent Mater 2013; 29:199-210. [PMID: 23138046 PMCID: PMC3552134 DOI: 10.1016/j.dental.2012.10.005] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 08/23/2012] [Accepted: 10/12/2012] [Indexed: 01/23/2023]
Abstract
OBJECTIVES Secondary caries is the main reason for restoration failure, and replacement of the failed restorations accounts for 50-70% of all restorations. Antibacterial adhesives could inhibit residual bacteria in tooth cavity and invading bacteria along the margins. Calcium (Ca) and phosphate (P) ion release could remineralize the lesions. The objectives of this study were to incorporate nanoparticles of silver (NAg) and nanoparticles of amorphous calcium phosphate (NACP) into adhesive for the first time, and to investigate the effects on dentin bond strength and plaque microcosm biofilms. METHODS Scotchbond multi-purpose adhesive was used as control. NAg were added into primer and adhesive at 0.1% by mass. NACP were mixed into adhesive at 10%, 20%, 30% and 40%. Microcosm biofilms were grown on disks with primer covering the adhesive on a composite. Biofilm metabolic activity, colony-forming units (CFU) and lactic acid were measured. RESULTS Human dentin shear bond strengths (n=10) ranged from 26 to 34 MPa; adding NAg and NACP into adhesive did not decrease the bond strength (p>0.1). SEM examination revealed resin tags from well-filled dentinal tubules. Numerous NACP infiltrated into the dentinal tubules. While NACP had little antibacterial effect, NAg in bonding agents greatly reduced the biofilm viability and metabolic activity, compared to the control (p<0.05). CFU for total microorganisms, total streptococci, and mutans streptococci on bonding agents with NAg were an order of magnitude less than those of the control. Lactic acid production by biofilms for groups containing NAg was 1/4 of that of the control. SIGNIFICANCE Dental plaque microcosm biofilm viability and acid production were greatly reduced on bonding agents containing NAg and NACP, without compromising dentin bond strength. The novel method of incorporating dual agents (remineralizing agent NACP and antibacterial agent NAg) may have wide applicability to other dental bonding systems.
Collapse
Affiliation(s)
- Mary Anne S. Melo
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, CE, Brazil
| | - Lei Cheng
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Ke Zhang
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- Dept. of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Michael D. Weir
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Lidiany K. A. Rodrigues
- Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, CE, Brazil
| | - Hockin H. K. Xu
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Dept. of Mechanical Engineering, Univ. of Maryland, Baltimore County, MD 21250, USA
| |
Collapse
|
8
|
Murthy BS, Manjula K, George JV, Shruthi N. Evaluation of effect of three different dental unit waterline antimicrobials on the shear bond strength to dentin - An ex vivo study. J Conserv Dent 2012; 15:289-92. [PMID: 22876021 PMCID: PMC3410344 DOI: 10.4103/0972-0707.97963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 11/14/2011] [Accepted: 01/13/2012] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND In restorative treatment dental unit water is used while irrigating the cavity and also in the use of composite restorations to flush away the etchant to place bonding agent. These antimicrobials may influence the bond strength of the dentine bonding agent to the dentine. AIM AND OBJECTIVE To evaluate the effect of three different dental units waterline antimicrobials on the shear bond strength of dentin. MATERIALS AND METHODS Sixty freshly extracted human teeth were taken and the occlusal surfaces were sectioned to obtain a flat dentin surface. Then the teeth were randomized into 4 groups depending on the antimicrobial used: Group 1(Distilled water), Group 2 (Alpron), Group 3 (CitriSil), and Group 4 (Chlorhexidine). The dentine surface was prepared for bonding and composite resin was placed in two increments of 2 mm each. The specimens were stored in distilled water, thermo cycled after 7 days shear test was performed by using the universal testing machine. RESULT No significant difference between Group 1 and Group 2 with regard to shear bond strength. There was a significant difference in the SBS of Group 1 and Group 3 and Group 4. The SBS of group 2 was higher than Group 3 and Group 4 and the difference was statistically significant. CONCLUSION Citrisil and Chlorhexidine groups showed affected bond strength whereas Alpron did not vary with bond strength.
Collapse
Affiliation(s)
- Bv Sreenivasa Murthy
- Department of Conservative Dentistry and Endodontics, M.S. Ramaiah Dental College and Hospital, M.S. Ramaiah Nagar, MSRIT Post, Bangalore, Karnataka, India
| | | | | | | |
Collapse
|
9
|
Zhang K, Melo MAS, Cheng L, Weir MD, Bai Y, Xu HHK. Effect of quaternary ammonium and silver nanoparticle-containing adhesives on dentin bond strength and dental plaque microcosm biofilms. Dent Mater 2012; 28:842-52. [PMID: 22592165 PMCID: PMC3393841 DOI: 10.1016/j.dental.2012.04.027] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 03/13/2012] [Accepted: 04/16/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE Antibacterial bonding agents are promising to hinder the residual and invading bacteria at the tooth-restoration interfaces. The objectives of this study were to develop an antibacterial bonding agent by incorporation of quaternary ammonium dimethacrylate (QADM) and nanoparticles of silver (NAg), and to investigate the effect of QADM-NAg adhesive and primer on dentin bond strength and plaque microcosm biofilm response for the first time. METHODS Scotchbond Multi-Purpose adhesive and primer were used as control. Experimental adhesive and primer were made by adding QADM and NAg into control adhesive and primer. Human dentin shear bond strengths were measured (n = 10). A dental plaque microcosm biofilm model with human saliva as inoculum was used to investigate biofilm metabolic activity, colony-forming unit (CFU) counts, lactic acid production, and live/dead staining assay (n = 6). RESULTS Adding QADM and NAg into adhesive and primer did not compromise the dentin shear bond strength which ranged from 30 to 35MPa (p>0.1). Scanning electron microscopy (SEM) examinations revealed numerous resin tags, which were similar for the control and the QADM and NAg groups. Adding QADM or NAg markedly reduced the biofilm viability, compared to adhesive control. QADM and NAg together in the adhesive had a much stronger antibacterial effect than using each agent alone (p<0.05). Adding QADM and NAg in both adhesive and primer had the strongest antibacterial activity, reducing metabolic activity, CFU, and lactic acid by an order of magnitude, compared to control. SIGNIFICANCE Without compromising dentin bond strength and resin tag formation, the QADM and NAg containing adhesive and primer achieved strong antibacterial effects against microcosm biofilms for the first time. QADM-NAg adhesive and primer are promising to combat residual bacteria in tooth cavity and invading bacteria at the margins, thereby to inhibit secondary caries. QADM and NAg incorporation may have a wide applicability to other dental bonding systems.
Collapse
Affiliation(s)
- Ke Zhang
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- Dept. of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Mary Anne S. Melo
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceara, Fortaleza, CE, Brazil
| | - Lei Cheng
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Michael D. Weir
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Yuxing Bai
- Dept. of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Hockin H. K. Xu
- Biomaterials & Tissue Engineering Division, Dept. of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Dept. of Mechanical Engineering, Univ. of Maryland, Baltimore County, MD 21250, USA
| |
Collapse
|
10
|
Suryakumari NBP, Reddy PS, Surender LR, Kiran R. In vitro evaluation of influence of salivary contamination on the dentin bond strength of one-bottle adhesive systems. Contemp Clin Dent 2011; 2:160-4. [PMID: 22090757 PMCID: PMC3214520 DOI: 10.4103/0976-237x.86440] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
AIM To evaluate the effect of salivary contamination on the bond strength of one-bottle adhesive systems - (the V generation) at various stages during the bonding procedure and to investigate the effect of the contaminant removing treatments on the recovery of bond strengths. MATERIALS AND METHODS In this study the V generation one-bottle system - (Adper Single Bond) was tested. Fifty caries-free human molars with flat dentin surfaces were randomly divided into five groups of ten teeth each: Group I had 15 second etching with 35% Ortho Phosphoric acid, 15 second rinse and blot dried (Uncontaminated); Group II contaminated and blot dried; Group III contaminated and completely dried; Group IV contaminated, washed, blot dried; Group V contaminated, retched washed, and blot dried. The bonding agent was applied and resin composite (Z-100 3M ESPE) was bonded to the treated surfaces using the Teflon mold. The specimens in each group were then subjected to shear bond strength testing in an Instron Universal testing machine at a crosshead speed of 1 mm / minute and the data were subjected to one way ANOVA for comparison among the groups (P<0.05). RESULTS There was a significant difference between the group that was dried with strong oil-free air after contamination (Group III) and the other groups. When the etched surface was contaminated by saliva, there was no statistical difference between the just blot dry, wash, or the re-etching groups (Groups II, IV, V) if the dentin surface was kept wet before priming. When the etched dentin surface was dried (Group III) the shear bond strength decreased considerably. CONCLUSION The bond strengths to the tooth structure of the recent dentin bonding agents are less sensitive to common forms of contamination than assumed. Re-etching without additional mechanical preparation is sufficient to provide or achieve the expected bond strength.
Collapse
Affiliation(s)
- Nujella B P Suryakumari
- Department of Conservative Dentistry and Endodontics, MNR Dental College and Hospital, Sangareddy, India
| | | | | | | |
Collapse
|
11
|
Manimaran VS, Srinivasulu S, Rajesh Ebenezar A, Mahalaxmi S, Srinivasan N. Application of a proanthocyanidin agent to improve the bond strength of root dentin treated with sodium hypochlorite. J Conserv Dent 2011; 14:306-8. [PMID: 22025839 PMCID: PMC3198565 DOI: 10.4103/0972-0707.85822] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2010] [Revised: 12/20/2010] [Accepted: 02/03/2011] [Indexed: 11/16/2022] Open
Abstract
Aim: The objective of this study was to analyze the application of PA agent that improves the bond strength of root dentin treated with NaOCl. Materials and Methods: Group 1: root canals were irrigated using 0.9% isotonic saline as an irrigant (negative control); Group 2: root canals were irrigated using 5.25% NaOCl (positive control); Group 3: root canals were irrigated with 5.25% NaOCl followed by 10% sodium ascorbate for 10 minutes; Group 4: root canals were irrigated with 5.25% NaOCl followed by 5% PA for 10 minutes. All the canals were then coated with self-etch dentin bonding agent, filled with resin cement, stored for one day in water, and then cross sectioned into three slabs of 2-mm thickness that were prepared and tested for microtensile bond strength. Results: The results demonstrated that 5.25% NaOCl caused significant reduction (P<0.05) in the bond strength, but this can be reversed by 5% PA significantly more than the 10% sodium ascorbate.
Collapse
Affiliation(s)
- V Sujatha Manimaran
- Department of Conservative Dentistry and Endodontics, SRM Dental College, Ramapuram, Chennai, India
| | | | | | | | | |
Collapse
|