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Odabasi D, Guler C, Kucukaslan D. Evaluation of the amount of residual monomer released from different flowable composite resins. BMC Oral Health 2024; 24:244. [PMID: 38360710 PMCID: PMC10870472 DOI: 10.1186/s12903-024-04005-2] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 02/08/2024] [Indexed: 02/17/2024] Open
Abstract
Today, resin materials are used in the restoration of permanent and deciduous teeth or as fissure sealants. The materials can contain different types of monomers (Bis-GMA, UDMA, TEGDMA). These monomers can be released into the oral cavity after polymerization. Residual monomers released from resin-containing restorative materials after polymerization have been reported to have negative effects on mechanical properties. The aim of our study is to evaluate the amount of residual monomers released after polymerization of different flowable composite resin materials using two different modes of LED light source. Composite disc samples (8 mm diameter/2 mm depth) prepared for each material group were polymerized using two different modes of the LED light device (Standard mode and extra power mode). HPLC (High Performance Liquid Chromatography) device was used to measure the amount of residual monomer release at 1 h, 1 day, 3 days and 7 days periods. Pairwise comparison of the differences between the materials was performed by Post-hoc test. For each residual monomer, the Kruskal Wallis test was used to analyze the difference between the materials in standard mode and the difference between the materials in extra power mode. According to the results of the study; Grandio flow flowable composite showed the highest release of TEGDMA and Bis-GMA while SDR® Flow flowable composite showed the lowest release of TEGDMA, Bis-GMA and UDMA. For all materials, the extra power mode resulted in more residual monomer release. TEGDMA and Bis-GMA release was detected in all tested flowable composites at all time periods.
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Affiliation(s)
- Didem Odabasi
- Faculty of Dentistry, Department of Pediatric Dentistry, Ordu University, Ordu, 52200, Turkey.
| | - Cigdem Guler
- Faculty of Dentistry, Department of Pediatric Dentistry, Ordu University, Ordu, 52200, Turkey
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Osama S, Badran AS, Awad BG. Effect of silver diamine fluoride on the microleakage of flowable resin composite and glass ionomer cement restorations to carious primary dentin: an-in vitro study. BMC Oral Health 2024; 24:91. [PMID: 38229047 DOI: 10.1186/s12903-024-03861-2] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 01/04/2024] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND This study aimed to evaluate the effect of Silver Diamine Fluoride (SDF) on the microleakage of flowable resin composite (FRC) and resin-modified glass ionomer cement (GIC) restorations bound to carious primary dentin. METHODS Forty-four extracted carious primary molars were allocated into four groups as follows (n = 11 teeth/group): Group I, Flowable resin composite (FRCa): SDF38% treatment + FRC, Group II, Flowable resin composite (FRCb): FRC without SDF treatment, Group III, Resin-modified glass ionomer cement (GICa): SDF38% treatment + GIC, Group IV, Resin-modified glass ionomer cement (GICb): GIC without SDF treatment. Specimens were subjected to thermo cycling at 500 cycles between 5 to 55 °C (dwell time of 60 seconds) in baths before being immersed for 24 h in a 1% toluidine blue solution. Microleakage testing was conducted for each specimen in two areas; occlusal and gingival. Specimens were evaluated under stereomicroscope at 4x magnification. Results were analyzed using Kruskal-Wallis test followed by pairwise comparisons utilizing Dunn's post hoc test at p ≤ 0.05. RESULTS Insignificant differences between different groups (p = 0.49) were observed at the gingival walls area readings. The highest value was found in GICb (2.33 ± 0.52), while the lowest value was found in FRCa (1.71 ± 0.76). Insignificant differences between different groups (p = 0.982) were observed at the occlusal walls area readings. The highest value was found in FRCa (1.43 ± 0.98), while the lowest value was found in GICb (1.17 ± 1.33). CONCLUSION SDF does not adversely affect the microleakage of FRC and GIC restorations bound to carious primary dentin.
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Affiliation(s)
- Sarah Osama
- Department of Pediatric Dentistry & Dental Public Health, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Amira Saad Badran
- Department of Pediatric Dentistry & Dental Public Health, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Basma Gamal Awad
- Department of Pediatric Dentistry & Dental Public Health, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.
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Abdulsattar YH, Kadhim AJ. Effect of immediate dentin sealing on the fracture strength of indirect overlay restorations using different types of luting agents (A comparative in vitro study). J Conserv Dent Endod 2023; 26:434-440. [PMID: 37705547 PMCID: PMC10497084 DOI: 10.4103/jcd.jcd_226_23] [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] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/15/2023] [Accepted: 05/30/2023] [Indexed: 09/15/2023]
Abstract
Objective This study evaluates the effects of immediate dentin sealing (IDS) on the fracture resistance of lithium disilicate overlays using three different types of resin-luting agents (preheated composite, dual-cure adhesive resin, and flowable composite). Materials and Methods Forty-eight maxillary first premolars of equal size were prepared using a butt joint preparation design. The teeth were separated into two primary groups, each with 24 teeth: Group DDS - delay dentin sealing (DDS) (non-IDS) teeth were not treated. Group IDS - dentin sealing was applied immediately after teeth preparations. Each group was subsequently separated into three separate subgroups of eight teeth. Subgroups DDS+Phc and IDS+Phc - cemented with preheated composite (Enamel plus HRi, Micerium, Italy), subgroups DDS+Dcrs and IDS+Dcrs - cemented with dual-cured resin cement (RelyX Ultimate, 3M ESPE, Germany), and subgroups DDS+Fc and IDS+Fc - cemented with flowable composite (Filtek Supreme Flowable, 3M ESPE, USA). The fracture resistance of each sample was evaluated using a test of a single load till failure, which was automatically recorded in Newton by a computer-controlled universal testing system. Results The fracture resistance of the subgroup IDS+Phc was the highest mean value, in which the overlay was cemented with preheated composite (1954 N), and the lowest mean was noted in the subgroup DDS+Fc, by which the overlay cemented with flowable composite without IDS (887 N). All IDS subgroups had a high mean fracture load. Both the Bonferroni test and the one-way ANOVA test identified a significant difference between all groups of 0.05. Conclusion In general, teeth with IDS were stronger than teeth without IDS. When the preheated composite is used as a luting agent improves overall fracture resistance, followed by resin cement and flowable composite, respectively. However, the result showed that the ceramic overlays with and without IDS are strong enough to withstand the normal mastication force. Overlays was failed in a more catastrophic, irreparable mode of fracture than the clinical situation.
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Affiliation(s)
- Yousif Hussam Abdulsattar
- Department of Restorative and Aesthetic Dentistry, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Alaa Jawad Kadhim
- Department of Restorative and Aesthetic Dentistry, College of Dentistry, University of Baghdad, Baghdad, Iraq
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Kalakijuybari FZ, Pasdar N, Ahmadi G, Seyedmajidi A. Investigating the impact of flowable composite liner on the fracture strength and microleakage of large composite resin restorations of primary anterior teeth. Eur Arch Paediatr Dent 2023:10.1007/s40368-023-00812-3. [PMID: 37341920 DOI: 10.1007/s40368-023-00812-3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 06/02/2023] [Indexed: 06/22/2023]
Abstract
PURPOSE To investigate the effect of pre-cured and co-cured flowable composite liner on fracture strength and microleakage of primary anterior teeth with extended composite resin restorations. METHODS In the current in vitro experimental study, the crowns of 54 extracted primary canine teeth were cut 1 mm above the CEJ, and a pulpectomy procedure was performed. The samples were randomly divided into three groups to restore the coronal part up to 4 mm above the CEJ. In group 1, the samples were built up with Filtek Z250 packable composite resin. In group 2 (pre-cure), first, 1 mm of Filtek Z350 XT flowable liner was applied to the sample, and after curing, the restoration process continued using packable composite resin. In group 3 (co-cure), the flowable composite liner was cured while the first layer of packable composite resin was applied; then, the same restorative procedure similar to the other groups was followed. The samples' cross-sectional area in the fracture strength test was calculated by AutoCAD software. Subsequently, the samples were subjected to a force in a universal testing machine. The samples related to the microleakage experiment were cut vertically, and then, the dye penetration percentage (10% methylene blue) was measured under a stereomicroscope. ANOVA was used to analyze the data. RESULTS Mean fracture strength in group 2 was significantly higher than in group 1 (P = 0.016). The microleakage mean in group 3 was significantly lower than in groups 1 (P = 0.000) and 2 (P = 0.026). CONCLUSION The flowable composite liner and its relevant separate curing increased the fracture strength of composite resin restorations. However, less microleakage was reported in the group where the liner was applied as a co-cure.
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Affiliation(s)
- F Z Kalakijuybari
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran.
| | - N Pasdar
- Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - G Ahmadi
- Oral Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - A Seyedmajidi
- Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
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Alkhubaizi Q, Alomari Q, Sabti MY, Melo MA. Effect of Type of Resin Composite Material on Porosity, Interfacial Gaps and Microhardness of Small Class I Restorations. J Contemp Dent Pract 2023; 24:4-8. [PMID: 37189005 DOI: 10.5005/jp-journals-10024-3458] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
AIM This study aimed to compare the best restorative approach for the conservative class I cavity by comparing flowable and nanohybrid composites versus the placement technique regarding surface microhardness, porosity, and presence of interface gaps. MATERIALS AND METHODS Forty human molars were divided into four groups (n = 10). Standardized class I cavities were prepared and restored using one of the following materials: Group I - Flowable composite placed by incremental technique; group II - Flowable composite placed in one increment; group III - Nanohybrid composite placed by incremental technique; and group IV - Nano-hybrid composite placed in one increment. After finishing and polishing, specimens were sectioned into two halves. One section was chosen randomly for the Vickers microhardness (HV) evaluation and the other section was used for the assessment of porosities and interfacial adaptation (IA). RESULTS The surface microhardness range was 28.5-76.2 (p < 0.05), mean pulpal microhardness range was 27.6-74.4 (p < 0.05). Flowable composites had lower HV than conventional counterparts. The mean pulpal HV of all materials exceeded 80% of occlusal HV. Restorative approaches did not statistically differ in porosities. However, IA percentages were higher in flowable materials compared to nanocomposites. CONCLUSION Flowable resin composite materials have lower microhardness than Nanohybrid composites. In small class I cavities, the number of porosities was similar between the different placement techniques and the interfacial gaps were highest in the flowable composites. CLINICAL SIGNIFICANCE The use of nanohybrid resin composite to restore class I cavities will result in better hardness and less interfacial gaps compared to flowable composites.
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Affiliation(s)
- Qoot Alkhubaizi
- Department of General Dentistry, University of Maryland School of Dentistry, Maryland, United States of America, Phone: (+1) 410 706 0844, e-mail:
| | - Qasem Alomari
- Department of Restorative Sciences, Kuwait University, Kuwait
| | - Mohammad Y Sabti
- Department of General Dental Practice, Kuwait University, Kuwait
| | - Mary Anne Melo
- Department of General Dentistry, University of Maryland School of Dentistry, Maryland, United States of America
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Tang C, Ahmed MH, Yao C, Mercelis B, Yoshihara K, Peumans M, Van Meerbeek B. Experimental two-step universal adhesives bond durably in a challenging high C-factor cavity model. Dent Mater 2023; 39:70-85. [PMID: 36481302 DOI: 10.1016/j.dental.2022.11.021] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 11/20/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVES To determine the bonding effectiveness of experimental 2-step universal adhesives (UAs) to high C-factor class-I cavity-bottom dentin and to assess the potential bond-strength contribution of an additional flowable composite layer. METHODS Three experimental 2-step UA formulations, involving the application of a 10-MDP-based primer followed by a hydrophobic adhesive resin with a 15-to-20-µm film thickness and differing only for filler, referred to as BZF-21 (silica and bioglass filler), BZF-29 (silica filler) and BZF-29_hv (higher silica-filler loading resulting in a higher viscosity), all prepared by GC, along with three representative commercial adhesives, Clearfil SE Bond 2 (C-SE2, Kuraray Noritake), G-Premio Bond (G-PrB, GC) and OptiBond FL (Opti-FL, Kerr), were comparatively investigated for their 'immediate' and 'aged' (50,000 thermocycles) micro-tensile bond strength (μTBS), when applied either in etch-and-rinse (E&R) or self-etch (SE) mode, to high C-factor class-I cavity-bottom dentin (n = 10; 10 experimental groups). Four additional experimental groups involved the extra application of the flowable composite G-ænial Universal Flo (GC), employed as an intermediate liner in combination with the adhesives BZF-29 and G-PrB and again applied both in E&R or SE mode. Statistical analysis was performed using linear mixed-effects (LME) modelling and linear regression analysis (p < 0.05). RESULTS All 2-step UAs performed similarly when compared to the gold-standard E&R Opti-FL and SE C-SE2 adhesives, except for the aged μTBS of BZF-29_hv applied in E&R mode, and significantly outperformed the 1-step UA G-PrB. Significant reduction in μTBS upon aging was only recorded for 2-step UAs applied in E&R mode. The extra flowable composite layer significantly improved G-PrB's μTBS. SIGNIFICANCE The experimental 2-step UAs revealed favorable bonding performance in the challenging high C-factor class-I cavity model, comparable to that of the multi-step gold-standard E&R and SE adhesives and superior to that of the 1-step UA investigated. An additionally applied flowable composite layer compensated for the lower bonding effectiveness of the 1-step UA in the high C-factor cavity model.
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Affiliation(s)
- Chuliang Tang
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium
| | - Mohammed H Ahmed
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium; Tanta University, Faculty of Dentistry, Department of Dental Biomaterials, Tanta 32511, Egypt
| | - Chenmin Yao
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium; Wuhan University, School & Hospital of Stomatology, The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, Wuhan 430079, China
| | - Ben Mercelis
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium
| | - Kumiko Yoshihara
- Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Pathology & Experimental Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan; National Institute of Advanced Industrial Science and Technology (AIST), Health and Medical Research Institute, 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Marleen Peumans
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium
| | - Bart Van Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT - Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, B-3000 Leuven, Belgium.
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Ozan G, Sancakli HS, Erdemir U, Yaman BC, Yildiz SO, Yildiz E. COMPARATIVE EVALUATION OF A FISSURE SEALANT AND A FLOWABLE COMPOSITE: A 36-MONTH SPLIT-MOUTH, RANDOMIZED CLINICAL STUDY. J Dent 2022; 123:104205. [PMID: 35724939 DOI: 10.1016/j.jdent.2022.104205] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 06/10/2022] [Accepted: 06/16/2022] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVES The purpose of the present clinical evaluation was to investigate the effect of a fissure sealant and a flowable composite at fissures of permanent molars in terms of retention and caries-incidence rates over a 36-month period. METHODS Thirty-four patients, ages varied from 16 to 22 years, diagnosed with at least 2 non-cavitated pit-and-fissure caries in the first and second molars were involved in the study. A total of 220 sealants, were placed in 117 upper molars and 103 lower molars. Teeth were sealed with either a flowable resin composite (Tetric Evo Flow) or a sealant material (Helioseal F)(n=110). Each restoration was evaluated in terms of retention and caries incidence at 6, 12, 24 and 36 months according to their location as well. Data were analyzed using Mann-Whitney U, Friedman and 1-way ANOVA tests at p < 0.05. RESULTS Tetric Evo Flow showed total retention with 95.5%, 93.8%, 88.5% and 80.2% at 6, 12, 24 and 36-month follow-ups respectively, while Helioseal F had retention rates of 95.5%, 94.8%, 85.4% and 80.2% respectively. After 36-months, there were 6 subjects totally lost in Helioseal F group, whereas 7 of the Tetric Evo Flow sunjects were totally lost. Caries development was firstly detected at 12-month evaluation for both of the materials however, no significant differences were observed among materials in retention rates or caries incidence after 36-month follow-ups (p>0.05). SIGNIFICANCE Using the flowable composite found as effective as the fissure sealant after 36-months regarding retention and caries incidence rates.
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Affiliation(s)
- Gunce Ozan
- Istanbul University Faculty of Dentistry Dept. of Restorative Dentistry
| | - Hande Sar Sancakli
- Istanbul University Faculty of Dentistry Dept. of Restorative Dentistry.
| | - Ugur Erdemir
- Istanbul University Faculty of Dentistry Dept. of Restorative Dentistry
| | - Batu Can Yaman
- Osmangazi University Faculty of Dentistry Dept. of Restorative Dentistry
| | | | - Esra Yildiz
- Istanbul University Faculty of Dentistry Dept. of Restorative Dentistry
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Mulay S, Galankar K, Varadarajan S, Gupta AA. Evaluating fluoride uptake of dentin from different restorative materials at various time intervals - In vitro study. J Oral Biol Craniofac Res 2022; 12:216-22. [PMID: 35024330 DOI: 10.1016/j.jobcr.2021.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/20/2021] [Accepted: 12/25/2021] [Indexed: 11/22/2022] Open
Abstract
Background Glass ionomer cement is very popular in clinical practice due to their antibacterial and cariostatic properties, which is totally dependant on the amount of fluoride release and uptake by dentine. The short-term and long-term fluoride uptake by dentine from commercially available restorative materials like nano-ionomer, zirconia reinforced glass ionomer cement and flowable composite is of clinical interest. Objective To evaluate and compare Nano-ionomer, Zirconia reinforced glass ionomer, and flowable composite resin for the fluoride uptake by dentin at different time intervals. Results One-way ANOVA (Tukey-Kramer Multiple Comparison Test) was applied to test the comparison of mean values of all parameters compared together. The student's paired 't' test was applied to compare groups. The fluoride uptake was evaluated at 3 days and 42 days. At 3 days dentin showed higher fluoride uptake with Zirconomer (Group Z) as compared to Ketac N100 and SDR Composite which was statistically significant. At 42 days higher fluoride uptake was seen in Ketac N100 (Group K) as compared to Zirconomer and SDR composite which was also statistically significant. Conclusion Fluoride uptake by dentine was seen in all study materials. Fluoride uptake by dentine at 3 days was seen maximum in Zirconomer, whereas fluoride uptake at 42 days was more in Ketac N100.
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Albeshir EG, Balhaddad AA, Mitwalli H, Wang X, Sun J, Melo MAS, Weir MD, Xu HHK. Minimally-invasive dentistry via dual-function novel bioactive low-shrinkage-stress flowable nanocomposites. Dent Mater 2021; 38:409-420. [PMID: 34973816 DOI: 10.1016/j.dental.2021.12.023] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/28/2021] [Accepted: 12/15/2021] [Indexed: 01/05/2023]
Abstract
The objectives of this in vitro study were to develop a novel low-shrinkage-stress flowable nanocomposite with antibacterial properties through the incorporation of dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of amorphous calcium phosphate (NACP), and investigate the mechanical and oral biofilm properties, to be used in minimally-invasive techniques. METHODS The light-cured low-shrinkage-stress flowable resin was formulated by mixing urethane dimethacrylate (UDMA) and triethylene glycol divinylbenzyl ether (TEG-DVBE) at a 1:1 mass ratio. Different mass fractions of glass, and either 5% DMAHDM or 20%NACP or both were incorporated. Paste flowability, ultimate micro tensile strength and surface roughness were evaluated. The antibacterial response of DMAHDM resin was assessed by using biofilms of human saliva-derived microcosm model. Virtuoso flowable composite was used as a control. RESULTS (45% resin+5% DMAHDM+20% NACP+30% glass) formula yielded the needed outcomes. It had flow rate within the range of ISO requirement. The micro tensile strength was (39.1 ± 4.3) MPa, similar to (40.1 ± 4.0) MPa for commercial control (p > 0.05). The surface roughness values of the novel composite (0.079 ± 0.01) µm similar to commercial composite (0.09 ± 0.02) µm (p > 0.05). Salivary microcosm biofilm colony forming unit values were reduced by 5-6 logs (p < 0.05). Biofilm metabolic activity was also substantially reduced, compared to control composite (p < 0.05). SIGNIFICANCE The novel bioactive flowable nanocomposite achieved strong antibacterial activities without compromising the mechanical properties. It is promising to be used as pit and fissure sealants, and as fillings in conservative cavities to inhibit recurrent caries and increase restoration longevity.
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Affiliation(s)
- Ebtehal G Albeshir
- Ph.D. Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Restorative Dentistry, King Abdul-Aziz Medical City, Riyadh 11426, Saudi Arabia.
| | - Abdulrahman A Balhaddad
- Ph.D. Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman bin Faisal University, Dammam 31441, Saudi Arabia.
| | - Heba Mitwalli
- Ph.D. Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Xiaohong Wang
- Volpe Research Center, American Dental Association Foundation, Frederick, MD 21704, USA
| | - Jirun Sun
- The Forsyth Institute, A Harvard School of Dental Medicine Affiliate, 245 First Street, Cambridge, MA 02142, USA.
| | - Mary Ann S Melo
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA.
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, 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.
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Lin S, Huang L, Li J, Wen J, Mei L, Xu H, Zhang L, Li H. Assessment of preparation time and 1-year Invisalign aligner attachment survival using flowable and packable composites. Angle Orthod 2021; 91:583-589. [PMID: 33848325 DOI: 10.2319/063020-598.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 12/01/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To compare preparation time and 1-year Invisalign aligner attachment survival between a flowable composite (FC) and a packable composite (PC). MATERIALS AND METHODS Fifty-five participants (13 men and 42 women, mean age ± SD: 24.2 ± 5.9 years) were included in the study. Ipsilateral quadrants (ie, maxillary and mandibular right, or vice versa) of attachments were randomly assigned to the FC group (Filtek Z350XT Flowable Restorative) and the PC group (Filtek Z350XT Universal Restorative) by tossing a coin. The primary outcome was preparation time. The secondary outcome was time to the first damage of an attachment. Preparation times were compared using the paired t-test, and the survival data were analyzed by the Cox proportional hazards model with a shared frailty term, with α = .05. RESULTS The preparation times were significantly shorter with the FC (6.22 ± 0.22 seconds per attachment) than with the PC (32.83 ± 2.16 seconds per attachment; P < .001). The attachment damage rates were 14.79% for the FC and 9.70% for the PC. According to the Cox models, attachment damage was not significantly affected by the attachment material, sex, arch, tooth location, attachment type, presence of overbite, or occurrence of tooth extraction. CONCLUSIONS The use of a FC may save time as compared with the use of a PC. With regard to attachment survival, there was no significant difference between the two composites. None of the covariates of attachment materials (sex, arch, tooth location, attachment type, presence of overbite, oir occurrence of tooth extraction) affected attachment damage.
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Venugopal K, Krishnaprasad L, V P PS, Ravi AB, Haridas K, Soman D. A Comparative Evaluation of Microleakage between Resin-Modified Glass Ionomer, Flowable Composite, and Cention-N in Class V Restorations: A Confocal Laser Scanning Microscope Study. J Pharm Bioallied Sci 2021; 13:S132-S136. [PMID: 34447061 PMCID: PMC8375940 DOI: 10.4103/jpbs.jpbs_609_20] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 09/29/2020] [Accepted: 09/30/2020] [Indexed: 12/02/2022] Open
Abstract
Background: Microleakage is a concern while restoring cervical lesions. Many products have attempted to minimize the interfacial gap between the tooth and restoration, the main pathway of microleakage. Aims and Objective: To compare and evaluate the microleakage in Class V cavity restored with nanohybrid flowable composite, Resin modified Glass Ionomer and Cention N. Method: Class V cavities were prepared on mandibular premolars on buccal surface with their occlusal margin placed in enamel and the gingival margin in dentin. The teeth were randomly assigned to three groups of 20 teeth each and restored with Flowable composite , Resin Modified GIC and Cention N. Samples were immersed in 0.5% Rhodamine dye, sectioned and microleakage measured using Confocal Laser Scanning Microscopy. Statistical analysis was done using Oneway ANOVA Bonferroni's test and Kruskal Waliis test. Results: The average depth of penetration of dye and scoring of depth were noted. On comparing dye penetration values between groups, RMGIC is compared with Flowable composite and Cention N, statistically significant result was obtained suggesting lesser dye penetration in RMGIC group (P < 0.001) where other comparison did not. Conclusion: RMGIC showed significantly less microleakage compared to the other two restorative materials used in the study and enamel margin of all restorations showed lesser microleakage than dentin margin.
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Affiliation(s)
- Krishnan Venugopal
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, AIMS, Kochi, India
| | - L Krishnaprasad
- Department of Conservative Dentistry and Endodontics, KVG Dental College, Sullia, Karnataka, India
| | - Prabath Singh V P
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, AIMS, Kochi, India
| | - Arjun B Ravi
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, AIMS, Kochi, India
| | - Kaushik Haridas
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, AIMS, Kochi, India
| | - Drisya Soman
- Department of Conservative Dentistry and Endodontics, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
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Zhang H, Wang L, Hua L, Guan R, Hou B. Randomized controlled clinical trial of a highly filled flowable composite in non-carious cervical lesions: 3-year results. Clin Oral Investig 2021; 25:5955-5965. [PMID: 33797635 DOI: 10.1007/s00784-021-03901-z] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 03/19/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES This prospective, randomized, split-mouth clinical trial assessed the 3-year clinical performance of a highly filled flowable composite and a conventional paste-type composite in non-carious cervical lesions (NCCLs). MATERIALS AND METHODS A total of 84 NCCLs in 27 subjects were included in this split-mouth design study and randomly divided into two groups: a highly filled flowable composite Clearfil Majesty ES Flow group (ES, n = 42) and a conventional paste-type composite Majesty group (MJ, n = 42). Clearfil SE Bond was used following the manufacturer's instructions. The restorations were evaluated at baseline (BL) and 1, 2, and 3 years using FDI (World Dental Federation) criteria. Data were analysed by a paired chi-squared test for intergroup comparisons and the Friedman test for intragroup comparisons (α = 0.05). RESULTS Both groups had a 97.3% retention rate at the 3-year evaluation. The acceptable scores (FDI scores 1-3) for each criterion exhibited no significant difference between the MJ and ES groups at any time point (p = 1.00). The marginal adaptation performance of ES was significantly better than that of MJ at every evaluation point (p < 0.05). CONCLUSIONS The 3-year clinical performance of ES in NCCLs was similar to that of MJ. When the restorations were clinically acceptable, ES showed better marginal adaptation than MJ. CLINICAL RELEVANCE Compared with conventional paste-type composites, highly filled flowable composites showed similar clinical performance and better marginal adaptation for restoring NCCLs after 3 years. TRIAL REGISTRATION TRN: ChiCTR1900028484 . Date of registration: December 22, 2019, retrospectively registered.
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Affiliation(s)
- Haiying Zhang
- Department of Endodontics, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Luxuan Wang
- Department of Endodontics, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Lin Hua
- School of Biomedical Engineering, Capital Medical University, Beijing, China
| | - Rui Guan
- Department of Endodontics, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Benxiang Hou
- Department of Endodontics, Beijing Stomatological Hospital, Capital Medical University, Beijing, China.
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Ning K, Loomans B, Yeung C, Li J, Yang F, Leeuwenburgh S. Influence of microcapsule parameters and initiator concentration on the self-healing capacity of resin-based dental composites. Dent Mater 2020; 37:403-412. [PMID: 33353737 DOI: 10.1016/j.dental.2020.11.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 06/04/2020] [Revised: 10/09/2020] [Accepted: 11/26/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Fracture is one of the main causes for failure of resin-based composite restorations. To overcome this drawback, self-healing resin-based composites have been designed by incorporation of microcapsules. However, the relationship between their self-healing capacity and microcapsule and resin parameters is still poorly understood. Therefore, the objective of this study was to systematically investigate the effect of initiator concentration (in the resin) and microcapsule size and concentration on the self-healing performance of commercially available flowable resin-based composites. METHODS Poly(urea-formaldehyde) (PUF) microcapsules containing acrylic healing liquid were synthesized in small (33±8μm), medium (68±21μm) and large sizes (198±43μm) and characterized. Subsequently, these microcapsules were incorporated into a conventional flowable resin-based composite (Majesty Flow ES2, Kuraray) at different contents (5-15wt%) and benzoyl peroxide (BPO) initiator concentrations (0.5-2.0wt%). Fracture toughness (KIC) of test specimens was tested using a single edge V-notched beam method. Immediately after complete fracture (KIC-initial), the two fractured parts were held together for 72h to allow for healing. Subsequently, fracture toughness of the healed resin-based composites (KIC-healed) was tested as well. RESULTS The fracture toughness of healed dental composites significantly increased with increasing microcapsule size and concentration (2wt% BPO, p<0.05). The highest self-healing efficiencies (up to 76%) were obtained with microcapsules sized 198±43 um. SIGNIFICANCE commercially available resin-based composites can be rendered self-healing most efficiently by incorporation of large microcapsules (198±43μm). However, long-term tests on fatigue and wear behavior are needed to confirm the clinical efficacy.
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Affiliation(s)
- K Ning
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Dentistry - Regenerative Biomaterials, Philips van Leydenlaan 25, Nijmegen, The Netherlands
| | - B Loomans
- Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Dentistry - Restorative Dentistry, Philips van Leydenlaan 25, Nijmegen, The Netherlands
| | - C Yeung
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Dentistry - Regenerative Biomaterials, Philips van Leydenlaan 25, Nijmegen, The Netherlands
| | - J Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - F Yang
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Dentistry - Regenerative Biomaterials, Philips van Leydenlaan 25, Nijmegen, The Netherlands
| | - S Leeuwenburgh
- Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Department of Dentistry - Regenerative Biomaterials, Philips van Leydenlaan 25, Nijmegen, The Netherlands.
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Bakhsh TA, Tagami J, Sadr A, Luong MN, Turkistani A, Almhimeed Y, Alshouibi E. Effect of light irradiation condition on gap formation under polymeric dental restoration; OCT study. Z Med Phys 2020; 30:194-200. [PMID: 32113749 DOI: 10.1016/j.zemedi.2020.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 09/20/2019] [Revised: 01/20/2020] [Accepted: 02/02/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To investigate the effect of two light-curing systems; quartz tungsten-halogen (QTH) and light-emitting diode (LED), and irradiation time on interfacial gap formation of dental composite resin restorations bonded with an adhesive resin using optical coherence tomography (OCT). MATERIALS AND METHODS Forty cavities were prepared in extracted human molar teeth and divided into four groups (n=10) based on the type of light curing system QTH (LITEX 680A) and LED (Demi Plus) and curing duration (10 s or 40 s). A single-step self-etching dental adhesive (Tetric® N-Bond; Ivoclar Vivadent AG, Schaan, FL, Liechtenstein) was applied and polymerized with QTH for 10 s (QTH-10), or for 40 s (QTH-40). Similarly, the adhesive in LED-10 and LED-40 groups was polymerized with an LED for 10 s or 40 s, respectively. Then, all specimens were restored with Filtek™ Z350 XT flowable composite (3M ESPE AG, St. Paul, MN, USA) and immersed in ammoniacal silver-nitrate contrasting solution. Cross-sectional images were recorded at every 250μm using cross-polarization OCT system (CP-OCT; IVS-300, Santec, Komaki, Aichi, Japan). Image analysis to quantify the percentage of gap at resin-dentin interface was performed using a custom plugin for ImageJ software. RESULTS Data analysis using one-way ANOVA showed a significant difference in mean gap percentage between the four test groups (p<0.0001). Mean gap percentage values were 75.8%, 53.2%, 9.9% and 5.6%. The highest for LED-10 followed by LED-40 (p <0.05). QTH-40 revealed a slightly better adaptation compared with QTH-10, but the difference between them was not significant (p <0.05). CONCLUSION CP-OCT with a contrast agent is a useful non-invasive imaging tool for dental composite resin materials. QTH showed better results than LED under the experimental conditions. When using an LED light-curing unit, prolonged irradiation improved interfacial adaptation of dental composite bonded with a self-etching adhesive.
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Affiliation(s)
- Turki A Bakhsh
- Restorative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 215-89, Saudi Arabia; School of Dentistry, Alfarabi Private College, Jeddah, Saudi Arabia.
| | - Jyunji Tagami
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Alireza Sadr
- Department of Restorative Dentistry, University of Washington School of Dentistry, Box 357456, 1959 NE Pacific Street, Seattle, WA 98195-7456, USA
| | - Minh N Luong
- Department of Restorative Dentistry, University of Washington School of Dentistry, Box 357456, 1959 NE Pacific Street, Seattle, WA 98195-7456, USA
| | - Alaa Turkistani
- Restorative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 215-89, Saudi Arabia
| | - Yasser Almhimeed
- Restorative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 215-89, Saudi Arabia
| | - Ehab Alshouibi
- Dental Public Health, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 215-89, Saudi Arabia
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Sartori N, Knezevic A, Peruchi LD, Phark JH, Duarte S. Effects of Light Attenuation through Dental Tissues on Cure Depth of Composite Resins. Acta Stomatol Croat 2019; 53:95-105. [PMID: 31341317 PMCID: PMC6604562 DOI: 10.15644/asc53/2/1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 10/31/2022] Open
Abstract
Objective Polymerization of light-cured resin-based materials is well documented; however, the intensity of the activating light can be reduced by passage through air, dental structure, or restoration compromising the physical properties of the restoration. The aim of this study was to evaluate the depth of cure of different light cured composite resins polymerized directly or transdental, through enamel and enamel/dentin tissues. Material and methods Five composite resins were selected for this experiment: SureFil SDR, Dentsply (SDR), Filtek Supreme Plus, 3M ESPE (FSP), Aelite LS, Bisco (ALS), Filtek LS, 3M ESPE (FLS), and TPH, Dentsply (TPH). Thirty specimens of each material were prepared with 2- or 4-mm thickness. The specimens were light-cured (Elipar 2500, 3M ESPE) for 40 sec using three different protocols: direct or transdental, through a disc of enamel with 1 mm of thickness, and a disc of enamel and dentin with 2 mm of thickness. Eight Vickers microhardness (VH) measurements were taken from each specimen, four on top and four on bottom surface (Micromet, Buehler, 100 g per 15 sec). Data was analyzed with ANOVA three-way, Tukey HSD post-hoc (α = .05). Results Bottom surfaces of specimens exhibited statistically significant lower Vickers microhardness than the top surfaces for all composite resin evaluated, regardless of the curing conditions, except for the SDR when direct light-cured. Transdental light curing through enamel/dentin layer, significantly decreased VH (P<0.05) on the bottom surface of all composite groups. Conclusion The results of this study showed that light-curing attenuation of dental structures negatively affect the micro-hardness of composite resins.
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Affiliation(s)
- Neimar Sartori
- Division of Restorative Sciences, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, CA, USA. 925 W 34th Street, DEN 4365, Los Angeles, CA 90089-0641
| | - Alena Knezevic
- Division of Restorative Sciences, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, CA, USA. 925 W 34th Street, DEN 4365, Los Angeles, CA 90089-0641
| | - Lais Dalmagro Peruchi
- Advanced Education in Pediatric Dentistry. NYU Langone - CA South 8110 Birmingham Way, San Diego, California 92123
| | - Jin-Ho Phark
- Division of Restorative Sciences, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, CA, USA. 925 W 34th Street, DEN 4365, Los Angeles, CA 90089-0641
| | - Sillas Duarte
- Division of Restorative Sciences, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, CA, USA. 925 W 34th Street, DEN 4365, Los Angeles, CA 90089-0641
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Kaisarly D, El Gezawi M, Nyamaa I, Rösch P, Kunzelmann KH. Effects of boundary condition on shrinkage vectors of a flowable composite in experimental cavity models made of dental substrates. Clin Oral Investig 2018; 23:2403-2411. [PMID: 30302605 DOI: 10.1007/s00784-018-2696-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 04/27/2018] [Accepted: 10/02/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVES Bond strength to enamel and dentin depends on the bonding approach or condition. This study investigated the effects of the boundary conditions, in terms of the bonding substrate and the bonding condition, on the shrinkage vectors of a flowable composite. MATERIALS AND METHODS An experimental cylindrical cavity (diameter = 6 mm, depth = 3 mm) consisting of the enamel floor and the surrounding dentin cavity walls was prepared for the "enamel-floor" group. Cylindrical cavities of the same dimensions were prepared with access from the occlusal enamel into dentin and served as controls. Each cavity model group was divided and bonded with two bonding conditions (n = 9): a self-etch (Adper Easy Bond, 3M ESPE) and a total-etch approach (OptiBond FL, Kerr). The composite (Tetric EvoFlow, Ivoclar Vivadent) was mixed with glass beads, applied to the cavity, scanned twice by micro-CT (uncured and cured states). The scans were evaluated by rigid registration, sphere segmentation, and registration for computing shrinkage vectors. RESULTS The free surface of all restorations moved downward. The shrinkage vectors in the experimental cavity model pointed downward towards the enamel cavity floor, and the net axial movement was downward. In the control group, shrinkage vectors additionally moved upward, away from the cavity floor. The effect of the bonding substrate and the bonding condition was investigated for the shrinkage vectors and the axial movement (univariate ANOVA). CONCLUSION The bonding substrate, enamel, influenced the shrinkage vectors' direction, while the bonding condition caused only variations in the magnitude. CLINICAL RELEVANCE Bonding to enamel influences shrinkage vectors' direction, while the bonding condition plays only a minor role. Graphical abstract ᅟ.
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Affiliation(s)
- Dalia Kaisarly
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse, 70 80336, Munich, Germany. .,Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
| | - Moataz El Gezawi
- Department of Conservative Dentistry, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - Indra Nyamaa
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse, 70 80336, Munich, Germany
| | - Peter Rösch
- Faculty of Computer Science, University of Applied Sciences, Augsburg, Germany
| | - Karl-Heinz Kunzelmann
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse, 70 80336, Munich, Germany
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Canali GD, Ignácio SA, Rached RN, Souza EM. One-year clinical evaluation of bulk-fill flowable vs. regular nanofilled composite in non-carious cervical lesions. Clin Oral Investig 2019; 23:889-97. [PMID: 29948275 DOI: 10.1007/s00784-018-2509-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 05/30/2018] [Indexed: 10/14/2022]
Abstract
OBJECTIVE The aim of this double-blind, randomized trial was to evaluate the 1-year clinical performance of a bulk-fill flowable and a regular nanofilled composite in non-carious cervical lesions (NCCLs). METHODS Twenty-two subjects with at least two NCCLs were enrolled in the study. A total of 89 restorations were performed by a single operator using Filtek Supreme (FS) Ultra Universal or Filtek Bulk (FB) Fill Flowable. A universal adhesive (Scotchbond™ Universal Adhesive) was used with a self-etching approach in dentin. The restorations were evaluated by two independent and previously calibrated examiners at baseline (7 days), 6 months and 1 year, according to the USPHS modified criteria. Mann-Whitney U test was used to analyze the differences between composites and Wilcoxon signed rank test for comparisons between the baseline and follow-ups (α = 5%). RESULTS One restoration was considered clinically unacceptable due to loss of retention after 6 months in the FS group. FS presented statistically high scores for surface roughness when compared to FB after 1 year (p < 0.05), but both were considered clinically acceptable. After 1 year, the frequency of clinically unacceptable rates was 3.3% for anatomical form in the FB group, 1.1% for retention in the FS group, and 2.2% for marginal adaptation in both groups. All restorations, in both groups, presented score 0 over the 1-year period for marginal staining, postoperative sensitivity, and secondary caries. CONCLUSION Both composite resins showed acceptable clinical performances for the restoration of NCCLs after 1 year. CLINICAL RELEVANCE Both bulk-fill flowable and regular nanofilled composites showed good clinical performances for the restoration of NCCLs after 1 year.
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Kaisarly D, El Gezawi M, Lai G, Jin J, Rösch P, Kunzelmann KH. Effects of occlusal cavity configuration on 3D shrinkage vectors in a flowable composite. Clin Oral Investig 2018; 22:2047-56. [PMID: 29248963 DOI: 10.1007/s00784-017-2304-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 12/07/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE The objective of this study was to investigate the effects of cavity configuration on the shrinkage vectors of a flowable resin-based composite (RBC) placed in occlusal cavities. MATERIALS AND METHODS Twenty-seven human molars were divided into three groups (n = 9) according to cavity configuration: "adhesive," "diverging," and "cylindrical." The "adhesive" cavity represented beveled enamel margins and occlusally converging walls, the "diverging" cavity had occlusally diverging walls, and the "cylindrical" cavity had parallel walls (diameter = 6 mm); all cavities were 3 mm deep. Each prepared cavity was treated with a self-etch adhesive (Adper Easy Bond, 3 M ESPE) and filled with a flowable RBC (Tetric EvoFlow, Ivoclar Vivadent) to which had been added 2 wt% traceable glass beads. Two micro-CT scans were performed on each sample (uncured and cured). The scans were then subjected to medical image registration for shrinkage vector calculation. Shrinkage vectors were evaluated three-dimensionally (3D) and in the axial direction. RESULTS The "adhesive" group had the greatest mean 3D shrinkage vector lengths and upward movement (31.1 ± 10.9 μm; - 13.7 ± 12.1 μm), followed by the "diverging" (27.4 ± 12.1 μm; - 5.7 ± 17.2 μm) and "cylindrical" groups (23.3 ± 11.1 μm; - 3.7 ± 13.6 μm); all groups differed significantly (p < 0.001 for each comparison, one-way ANOVA, Tamhane's T2). CONCLUSION The values and direction of the shrinkage vectors as well as interfacial debonding varied according to the cavity configuration. CLINICAL RELEVANCE Cavity configuration in terms of wall orientation and beveling of enamel margin influences the shrinkage pattern of composites.
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Kaisarly D, El Gezawi M, Xu X, Rösch P, Kunzelmann KH. Shrinkage vectors of a flowable composite in artificial cavity models with different boundary conditions: Ceramic and Teflon. J Mech Behav Biomed Mater 2017; 77:414-421. [PMID: 29020664 DOI: 10.1016/j.jmbbm.2017.10.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 06/30/2017] [Revised: 09/28/2017] [Accepted: 10/02/2017] [Indexed: 10/18/2022]
Abstract
Polymerization shrinkage of dental resin composites leads to stress build-up at the tooth-restoration interface that predisposes the restoration to debonding. In contrast to the heterogeneity of enamel and dentin, this study investigated the effect of boundary conditions in artificial cavity models such as ceramic and Teflon. Ceramic serves as a homogenous substrate that provides optimal bonding conditions, which we presented in the form of etched and silanized ceramic in addition to an etched, silanized and bonded ceramic cavity. In contrast, the Teflon cavity presented a non-adhesive boundary condition that provided an exaggerated condition of poor bonding as in the case of contamination during the application procedure or a poor bonding substrate such as sclerotic or deep dentin. The greatest 3D shrinkage vectors and movement in the axial direction were observed in the ceramic cavity with the bonding agent followed by the silanized ceramic cavity, and smallest shrinkage vectors and axial movements were observed in the Teflon cavity. The shrinkage vectors in the ceramic cavities exhibited downward movement toward the cavity bottom with great downward shrinkage of the free surface. The shrinkage vectors in the Teflon cavity pointed towards the center of the restoration with lateral movement greater at one side denoting the site of first detachment from the cavity walls. These results proved that the boundary conditions, in terms of bonding substrates, significantly influenced the shrinkage direction.
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Affiliation(s)
- Dalia Kaisarly
- Department of Operative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany; Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
| | - Moataz El Gezawi
- Department of Restorative Dentistry, University of Dammam, Dammam, Saudi Arabia
| | - Xiaohui Xu
- Department of Operative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Peter Rösch
- Faculty of Computer Science, University of Applied Sciences, Augsburg, Germany
| | - Karl-Heinz Kunzelmann
- Department of Operative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
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Teymoornezhad K, Alaghehmand H, Daryakenari G, Khafri S, Tabari M. Evaluating the Microshear Bond Strength and Microleakage of Flowable Composites Containing Zinc Oxide Nano-particles. Electron Physician 2016; 8:3289-3295. [PMID: 28070263 PMCID: PMC5217822 DOI: 10.19082/3289] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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] [Received: 03/30/2016] [Accepted: 06/04/2016] [Indexed: 11/20/2022] Open
Abstract
Introduction Preventive resin restorations (PRR) are the conservative choice for the most common carious lesions in children. Thus, new age flowable resin composites with higher filler content are readily used. The aim of this study was to evaluate the microshear bond strength and microleakage of two flowable resin composites containing different percentages of nano zinc oxide (NZnO) particles, which have proven to have antimicrobial properties. Methods This experimental in-vitro study was carried out in the Dental Material Research Center of Babol University of Medical Sciences in 2015. One nanohybrid and one nanofill flowable resin composite were chosen and modified with the incorporation of 1% and 3% Wt NZnO particles. Six groups (n=10, 0%, 1%, and 3%) of resin composite sticks on dental enamel (2×2mm) were prepared to be placed in the microtensile tester. The microshear bond strength magnitude (MPa) was recorded at the point of failure. A class I box (3×0.8×1 mm) was prepared on 60 premolars and filled using the resin composites (6 groups, n=10). The specimens were immersed in a 5% basic fuschin solution and sectioned bucco-lingually to view the microleakage using a stereomicroscope. One-way ANOVA and Tukey tests for microshear and Wilcoxon and Kruskal–Wallis tests for microleakage were used to analyze the data in the IBM SPSS Statistics version 22 software. Results The bond strength of the 3% clearfill group significantly decreased while no significant change occurred in the bond strength in other groups. The Z-350 group had significantly lower microleakage as nanoparticles increased. No significant difference was observed in the clearfill group. Conclusion Up to 3% Wt incorporation of NZnO particles will not diversely alter the bond strength, but it will be beneficial in providing antimicrobial effects with lower microleakage rates.
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Affiliation(s)
- Koorosh Teymoornezhad
- Postgraduate Student, Department of Pediatric Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Homayoun Alaghehmand
- Associate Professor, Dental Materials Research Center, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Ghazaleh Daryakenari
- Postgraduate Student, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
| | - Soraya Khafri
- Biostatistics and Epidemiology Department, Medicine School, Babol University of Medical Sciences, Babol, Iran
| | - Mitra Tabari
- Assistant Professor, Dental Materials Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
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Talic NF. Failure Rates of Orthodontic Fixed Lingual Retainers bonded with Two Flowable Light-cured Adhesives: A Comparative Prospective Clinical Trial. J Contemp Dent Pract 2016; 17:630-4. [PMID: 27659078 DOI: 10.5005/jp-journals-10024-1902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
INTRODUCTION This comparative prospective randomized clinical trial examined the in vivo failure rates of fixed mandibular and maxillary lingual retainers bonded with two light-cured flowable composites over 6 months. MATERIALS AND METHODS Consecutive patients were divided into two groups on a 1:1 basis. Two hundred fixed lingual retainers were included, and their failures were followed for 6 months. One group (n = 50) received retainers bonded with a nano-hybrid composite based on nano-optimized technology (Tetric-N-Flow, Ivoclar Vivadent). Another group (n = 50) received retainers bonded with a low viscosity (LV) composite (Transbond Supreme LV, 3M Unitek). RESULTS There was no significant difference between the overall failure rates of mandibular retainers bonded with Transbond (8%) and those bonded with Tetric-N-Flow (18%). However, the odds ratio for failure using Tetric-N-flow was 2.52-fold greater than that of Transbond. The failure rate of maxillary retainers bonded with Transbond was higher (14%), but not significantly different, than that of maxillary retainers bonded with Tetric-N-flow (10%). There was no significant difference in the estimated mean survival times of the maxillary and mandibular retainers bonded with the two composites. CONCLUSION Both types of composites tested in the current study can be used to bond fixed maxillary and mandibular lingual retainers, with low failure rates.
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Affiliation(s)
- Nabeel F Talic
- Associate Professor and Consultant, Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia, e-mail:
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Dao Luong MN, Shimada Y, Turkistani A, Tagami J, Sumi Y, Sadr A. Fractography of interface after microtensile bond strength test using swept-source optical coherence tomography. Dent Mater 2016; 32:862-9. [PMID: 27080369 DOI: 10.1016/j.dental.2016.03.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 05/26/2015] [Revised: 10/02/2015] [Accepted: 03/22/2016] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine the effect of crosshead speed and placement technique on interfacial crack formation in microtensile bond strength (MTBS) test using swept-source optical coherence tomography (SS-OCT). MATERIALS AND METHODS MTBS test beams (0.9×0.9mm(2)) were prepared from flat human dentin disks bonded with self-etch adhesive (Clearfil SE Bond, Kuraray) and universal composite (Clearfil AP-X, Kuraray) with or without flowable composite lining (Estelite Flow Quick, Tokuyama). Each beam was scanned under SS-OCT (Santec, Japan) at 1319nm center wavelength before MTBS test was performed at crosshead speed of either 1 or 10mm/min (n=10). The beams were scanned by SS-OCT again to detect and measure cracks at the debonded interface using digital image analysis software. Representative beams were observed under confocal laser scanning microscope to confirm the fractography findings. RESULTS Two-way ANOVA showed that for MTBS the crosshead speed was not a significant factor (p>0.05), while there was a difference between placement techniques (p<0.001), with flowable lining yielding higher mean values. On the other hand, for crack formation, there was a significant difference between crosshead speeds (p<0.01), while the placement technique did not show up as a statistically significant factor (p>0.05). The interaction of factors were not significant (p>0.05). SIGNIFICANCE Testing MTBS samples at higher crosshead speeds induced more cracks in dentin. Lining with a flowable composite improved the bonding quality and increased the bond strength. SS-OCT can visualize interfacial cracks after restoration debonding.
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Affiliation(s)
- Minh Nguyet Dao Luong
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
| | - Alaa Turkistani
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Operative Dentistry Division, Conservative Dental Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Yasunori Sumi
- Division of Oral and Dental Surgery, Department of Advanced Medicine, National Center for Geriatrics and Gerontology, National Hospital for Geriatric Medicine, 36-3, Gengo, Morioka, Obu, Aichi 474-8511, Japan
| | - Alireza Sadr
- Biomimetics Biomaterials Biophotonics & Technology Laboratory, Department of Restorative Dentistry, University of Washington School of Dentistry, 1959 NE Pacific St. Box 357456, Seattle, WA 98195-7456, USA
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Selig D, Haenel T, Hausnerová B, Moeginger B, Labrie D, Sullivan B, Price RBT. Examining exposure reciprocity in a resin based composite using high irradiance levels and real-time degree of conversion values. Dent Mater 2015; 31:583-93. [PMID: 25804190 DOI: 10.1016/j.dental.2015.02.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 12/10/2014] [Accepted: 02/16/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Exposure reciprocity suggests that, as long as the same radiant exposure is delivered, different combinations of irradiance and exposure time will achieve the same degree of resin polymerization. This study examined the validity of exposure reciprocity using real time degree of conversion results from one commercial flowable dental resin. Additionally a new fitting function to describe the polymerization kinetics is proposed. METHODS A Plasma Arc Light Curing Unit (LCU) was used to deliver 0.75, 1.2, 1.5, 3.7 or 7.5 W/cm(2) to 2mm thick samples of Tetric EvoFlow (Ivoclar Vivadent). The irradiances and radiant exposures received by the resin were determined using an integrating sphere connected to a fiber-optic spectrometer. The degree of conversion (DC) was recorded at a rate of 8.5 measurements a second at the bottom of the resin using attenuated total reflectance Fourier Transform mid-infrared spectroscopy (FT-MIR). Five specimens were exposed at each irradiance level. The DC reached after 170s and after 5, 10 and 15 J/cm(2) had been delivered was compared using analysis of variance and Fisher's PLSD post hoc multiple comparison tests (alpha=0.05). RESULTS The same DC values were not reached after the same radiant exposures of 5, 10 and 15 J/cm(2) had been delivered at an irradiance of 3.7 and 7.5 W/cm(2). Thus exposure reciprocity was not supported for Tetric EvoFlow (p<0.05). SIGNIFICANCE For Tetric EvoFlow, there was no significant difference in the DC when 5, 10 and 15J/cm(2) were delivered at irradiance levels of 0.75, 1.2 and 1.5 W/cm(2). The optimum combination of irradiance and exposure time for this commercial dental resin may be close to 1.5 W/cm(2) for 12s.
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Affiliation(s)
- Daniela Selig
- Dalhousie University, Department of Dental Clinical Sciences, Faculty of Dentistry, Halifax, Canada; Bonn-Rhein-Sieg University of Applied Sciences, Department of Natural Sciences, Rheinbach, Germany; FH Aachen University of Applied Sciences, Department of Natural Sciences, Jülich, Germany
| | - Thomas Haenel
- Dalhousie University, Department of Dental Clinical Sciences, Faculty of Dentistry, Halifax, Canada; Bonn-Rhein-Sieg University of Applied Sciences, Department of Natural Sciences, Rheinbach, Germany; Tomas Bata University in Zlin, Faculty of Technology, Department of Production Engineering, Zlin, Czech Republic; Tomas Bata University in Zlin, University Institute, Centre of Polymer Systems, Zlin, Czech Republic
| | - Berenika Hausnerová
- Tomas Bata University in Zlin, Faculty of Technology, Department of Production Engineering, Zlin, Czech Republic; Tomas Bata University in Zlin, University Institute, Centre of Polymer Systems, Zlin, Czech Republic
| | - Bernhard Moeginger
- Bonn-Rhein-Sieg University of Applied Sciences, Department of Natural Sciences, Rheinbach, Germany
| | - Daniel Labrie
- Dalhousie University, Department of Physics and Atmospheric Sciences, Halifax, Canada
| | - Braden Sullivan
- Dalhousie University, Department of Dental Clinical Sciences, Faculty of Dentistry, Halifax, Canada
| | - Richard B T Price
- Dalhousie University, Department of Dental Clinical Sciences, Faculty of Dentistry, Halifax, Canada.
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Aboobaker S, Nair BG, Gopal R, Jituri S, Veetil FRP. Effect of intra-orifice barriers on the fracture resistance of endodontically treated teeth - an ex-vivo study. J Clin Diagn Res 2015; 9:ZC17-20. [PMID: 25859518 PMCID: PMC4378800 DOI: 10.7860/jcdr/2015/11609.5552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 10/08/2014] [Accepted: 01/03/2015] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate and compare the fracture resistance of roots obturated with guttapercha using bonded amalgam, GC Light cure GIC (resin modified glass ionomer cement) and Tetric N Flow (flowable hybrid composite) as different intra orifice barriers. MATERIALS AND METHODS Eighty freshly extracted mandibular premolars with straight roots were reduced to 14 mm from the coronal aspect. All canals were enlarged to size 30 and specimens were obturated with gutta percha cones, except for control group specimens the coronal 3 mm of root fillings of all other group specimens were removed with the aid of heated plugger. All samples were randomly divided into 4 groups of 20 specimens each. They were control, Fuji GC LC GIC, Tetric N Flow and Bonded Amalgam. After the placement of the intra orifice barrier materials, specimens stored at 37(o)C and 100% humidity for one week to allow the materials to set completely. After one week, all the groups were subjected to fracture resistance testing by using Universal testing machine. RESULTS Data was analysed for significance by ANOVA (Analysis of variance) and further pair wise comparison was performed by Benferroni test. Level of significance was taken as 0.05. Tetric N Flow group showed better fracture resistance as compared to all other groups and Control group is least among the groups. Fracture resistance of Tetric N Flow compared with bonded amalgam was statistically significant. CONCLUSION Tetric N Flow and Fuji GC LC GIC can be used as intra-orifice barriers with good fracture resistance in endodontically treated teeth.
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Affiliation(s)
- Shaheen Aboobaker
- Senior Lecturer, Department of Conservative Dentistry & Endodontics, Malabar Dental College and Research Centre, Edappal, Kerala, India
| | - Baiju Gopalan Nair
- Professor and Head of The Department, Department of Conservative Dentistry & Endodontics, Malabar Dental College and Research Centre, Edappal, Kerala, India
| | - Rajesh Gopal
- Professor, Department of Conservative Dentistry & Endodontics, Noorul Islam College of Dental Sciences, Neyyatinkara, Kerala, India
| | - Sandeep Jituri
- Senior Lecturer, Department of Conservative Dentistry & Endodontics, Malabar Dental College and Research Centre, Edappal, Kerala, India
| | - Fazalu Rahman Pothu Veetil
- Senior Lecturer, Department of Conservative Dentistry & Endodontics, Malabar Dental College And Research Centre, Edappal, Kerala, India
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Erdemir U, Sancakli HS, Yaman BC, Ozel S, Yucel T, Yıldız E. Clinical comparison of a flowable composite and fissure sealant: a 24-month split-mouth, randomized, and controlled study. J Dent 2013; 42:149-57. [PMID: 24296163 DOI: 10.1016/j.jdent.2013.11.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [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: 05/23/2013] [Revised: 11/18/2013] [Accepted: 11/21/2013] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVES The aim of this clinical study was to evaluate the retention rate and caries-prevention effect of a flowable composite compared to a conventional resin-based sealant in a young population over a 24-month period. METHODS Thirty-four patients, ranging in age from 16 to 22 years, diagnosed with at least 2 non-cavitated pit-and-fissure caries in the first and second molars were selected for this randomized split-mouth design trial. A total of 220 sealants, were placed in 117 upper molars and 103 lower molars. The teeth were sealed with a flowable resin composite (Tetric Evo Flow) or a sealant material (Helioseal F). Each restoration was independently evaluated in terms of retention and the presence of caries at baseline and at 1, 6, 12, and 24 months. Data were analyzed using non-parametric Mann-Whitney U and Friedman 1-way ANOVA tests at p<0.05. RESULTS Tetric Evo Flow showed complete retention with 100%, 95.5%, 93.8%, and 88.5% at 1, 6, 12, and 24-month evaluations, respectively, while Helioseal F retention rates were 98.1%, 95.5%, 94.8%, and 85.4%, respectively, for the same evaluation periods. At the 24-month recall, 4 (4.2%) total losses were observed in subjects treated with Tetric Evo Flow and 2 total losses (2.1%) for Helioseal F, respectively. No significant differences were observed between the materials in retention rates or caries incidence for each evaluation period (p>0.05). CONCLUSION Placement of flowable composite as fissure sealants in the younger population seems to be as effective as conventional fluoride containing fissure sealants for the prevention of fissure caries. CLINICAL RELEVANCE The use of a flowable composite as a fissure sealant material, in conjunction with a total-etch, single bottle adhesive, yielded better retention than did the conventional fluoride containing resin-based fissure sealant over a 24-month period in young patients.
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Affiliation(s)
- Ugur Erdemir
- Istanbul University, Faculty of Dentistry, Department of Operative Dentistry, 34093 Capa-Istanbul, Turkey.
| | - Hande Sar Sancakli
- Istanbul University, Faculty of Dentistry, Department of Operative Dentistry, 34093 Capa-Istanbul, Turkey.
| | - Batu Can Yaman
- Osmangazi University, Faculty of Dentistry, Department of Operative Dentistry, 26480 Eskisehir, Turkey.
| | - Sevda Ozel
- Istanbul University, Faculty of Medicine, Department of Biostatistics and Medical Informatics, 34093 Capa-Istanbul, Turkey.
| | - Taner Yucel
- Istanbul University, Faculty of Dentistry, Department of Operative Dentistry, 34093 Capa-Istanbul, Turkey.
| | - Esra Yıldız
- Istanbul University, Faculty of Dentistry, Department of Operative Dentistry, 34093 Capa-Istanbul, Turkey.
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Prathibha RS. Comparing the reinforcing effects of a resin modified glassionomer cement, Flowable compomer, and Flowable composite in the restoration of calcium hydroxide-treated immature roots in vitro. Contemp Clin Dent 2012; 2:21-6. [PMID: 22114449 PMCID: PMC3220169 DOI: 10.4103/0976-237x.79298] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
One hundred and sixty human permanent central incisors were enlarged to a 120 file size after crown removal procedure to simulate immature teeth. The root canals were filled with calcium hydroxide and stored for 15 days (phase I), 30 days (phase II), 90 days (phase III), and 180 days (Phase IV). At the end of these selected time periods, calcium hydroxide was cleaned off the root canals of forty teeth that were randomly selected and obturated with gutta-percha points in the apical 2 mm of the root canals with a sealer. The specimens were further equally divided into four groups. Unrestored Group I served as control and the root canals of teeth in the other three group specimens were reinforced with resin modified glassionomer cement (RMGIC) (Group II), Flowable Compomer (Group III), and Flowable Composite (Group IV), respectively, using a translucent curing post. All specimens were subjected to compressive force using an Instron Testing machine, until fracture occurred. All the materials evaluated substantially reinforced the root specimens compared to the control. At the end of 180 days, Flowable composites showed maximum reinforcement compared to the other groups; however, no significant differences were found between the reinforcement capabilities of Flowable Compomer and RMGIC.
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Affiliation(s)
- Rani S Prathibha
- Department of Pediatric and Preventive Dentistry, DAPMRV Dental College and Hospital, Bangalore, India
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Basavanna R, Garg A, Kapur R. Evaluation of gingival microleakage of class II resin composite restorations with fiber inserts: An in vitro study. J Conserv Dent 2012; 15:166-9. [PMID: 22557817 PMCID: PMC3339013 DOI: 10.4103/0972-0707.94590] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 06/25/2011] [Revised: 10/19/2011] [Accepted: 11/23/2011] [Indexed: 11/16/2022] Open
Abstract
Aims/Objectives: To evaluate the effect of glass and polyethylene fiber inserts and flowable composite as a liner on the microleakage of Class II composite restorations with gingival margins on root surfaces. Materials and Methods: Class II slots were prepared on both the proximal sides of thirty freshly extracted mandibular molars and were divided into six groups, according to the type of fiber insert and use of flowable composite (Filtek Z350) as a liner. Filtek P-60 (3M/ESPE) posterior composite was used to restore all cavities. The specimens were thermocycled and stained with 2% Basic Fuchsin dye, and sectioned to evaluate the dye penetration under Stereomicroscope. Statistical analysis was done using Kruskalwallis test and Mann whitney U test. Results and Conclusion: This study showed that, fiber insert groups, with or without flowable liner, had reduced microleakage scores as compared to the control groups. However, statistically no significant difference was found between the groups with fiber inserts. Less microleakage was seen in Group IV (With flowable liner and without Fiber inserts) as compared to Group I (Without flowable liner and Fiber inserts).
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Affiliation(s)
- Rs Basavanna
- Department of Conservative Dentistry and Endodontics, M.M College of Dental Sciences and Research, Mullana, Ambala, Haryana, India
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C Maganur PD, Prabhakar AR, S S, Namineni S. Evaluation of Microleakage of RMGIC and Flowable Composite Immersed in Soft Drink and Fresh Fruit Juice: An in vitro Study. Int J Clin Pediatr Dent 2010; 3:153-61. [PMID: 27616837 PMCID: PMC4993821 DOI: 10.5005/jp-journals-10005-1071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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] [Received: 07/12/2010] [Accepted: 08/26/2010] [Indexed: 11/23/2022] Open
Abstract
Aim : The objective of the study was to evaluate and compare the effect of a soft drink and a fresh fruit juice on the microleakage of flowable composite and resin modified glass lonomer cement (RMGIC). Methods and materials : 70 non-carious human premolars were collected and stored in saline until further use. Class-V cavities were prepared and restored with RMGIC on the buccal surface and flowable composite on the lingual surface for evaluating microleakage. The experimental groups (Group I and II ) comprised of 60 teeth, while the remaining 10 formed the control group (Group III―Water). The experimental groups were further divided into 2 groups (Group I―Cola drink and Group II―Fresh orange fruit juice) of 30 teeth each. Each group was then further divided into 3 subgroups (Short, Medium and Long-immersion) containing 10 teeth as shown in flow chart. Immersion regime was followed according to Maupome G et al and microleakage was evaluated by using Rhodamine B dye and examined under stereomicroscope. Results : Microleakage data obtained was statistically analyzed by Chi-square test. The teeth showed statistically significant microleakage as the immersion regime increased. Interpretation and Conclusion : Low pH soft drink caused highly significant microleakage at the tooth and restorative material interface in medium and high immersion regimes signifying that the leakage pattern was directly proportional to the number of immersions. Thus, the study conclusively proves that the ‘sipping habit’ associated with commonly available low pH beverages is detrimental to the longevity of restorations.
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Affiliation(s)
- Prabha Devi C Maganur
- Ex-Postgraduate Student, Department of Pedodontics, Bapuji Dental College, Davangere, Karnataka, India
| | - A R Prabhakar
- Professor and Head, Department of Pedodontics, Bapuji Dental College, Davangere, Karnataka, India
| | - Sugandhan S
- Professor, Department of Pedodontics, Bapuji Dental College, Davangere, Karnataka, India
| | - Srinivas Namineni
- Professor, Department of Pedodontics, Bapuji Dental College, Davangere, Karnataka, India
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