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Magalhães L, Belém FV, França K, Assunção CM, Martins-Júnior PA, Turrioni AP, Paschoal MAB. Roughness assessment of colored compomers: Results after an erosive-abrasive in vitro cycling test. J Clin Exp Dent 2023; 15:e459-e463. [PMID: 37388432 PMCID: PMC10306388 DOI: 10.4317/jced.60544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 04/12/2023] [Indexed: 07/01/2023] Open
Abstract
Background The present in vitro study aimed to evaluate and compare the surface roughness of a colored compomer and a composite resin, after 15 days of erosive-abrasive cycling. Material and Methods The sample included ninety circular specimens, randomly divided (n = 10): G1 Berry, G2 Gold, G3 Pink, G4 Lemon, G5 Blue, G6 Silver, G7 Orange and G8 Green, referring to the different colors of compomer (Twinky Star®, VOCO, Germany) and G9 for composite resin (Z250®, 3M ESPE). The specimens were submerged in artificial saliva and stored at 37°C for 24 hours. After polishing and finishing, the specimens were submitted to initial roughness (R1). Then, the specimens were submerged in an acidic cola-based drink for 1 minute and then exposed to electric toothbrushing for 2 minutes for 15 days. After this period, the final roughness (R2) and the ΔRa were performed. Data were submitted to ANOVA and Tukey's test for intergroup comparison and paired T-test for intragroup comparison (p<0.05). Results Among compomers, the green color presented the higher/lower initial and final roughness values (0.94 ± 0.44, 1.35 ± 0.55) with lemon color presenting the most prominent real roughness increase (ΔRa = 0,74) whereas composite resin showed the lower values (0,17 ± 0.06, 0,31 ± 0.15; ΔRa = 0,14). Conclusions All compomers, after the erosive-abrasive challenge, presented an increase in roughness values when compared to composite resin with a highlight to green tones. Key words:Compomers, composite resins, surface properties.
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Affiliation(s)
- Louise Magalhães
- Undergraduate student, Federal University of Minas Gerais - UFMG, Dental School, Belo Horizonte, Minas Gerais, Brazil
| | - Fernanda-Vieira Belém
- DDS, Post Graduate Program in Dentistry, Federal University of Minas Gerais - UFMG, Dental School, Belo Horizonte, Minas Gerais, Brazil
| | - Kamilla França
- Undergraduate student, Federal University of Uberlândia, - UFU, Dental School, Uberlândia, Minas Gerais, Brazil
| | - Cristiane-Meira Assunção
- DDS, MSc, PhD, Adjunct Professor, Department of Child and Adolescent Oral Health, Federal University of Minas Gerais - UFMG, Dental School, Belo Horizonte, Minas Gerais, Brazil
| | - Paulo-Antônio Martins-Júnior
- DDS, MSc, PhD, Adjunct Professor, Department of Child and Adolescent Oral Health, Federal University of Minas Gerais - UFMG, Dental School, Belo Horizonte, Minas Gerais, Brazil
| | - Ana-Paula Turrioni
- DDS, MSc, PhD, Federal University of Uberlândia, - UFU, Dental School, Uberlândia, Minas Gerais, Brazil
| | - Marco-Aurélio-Benini Paschoal
- DDS, MSc, PhD, Adjunct Professor, Department of Child and Adolescent Oral Health, Federal University of Minas Gerais - UFMG, Dental School, Belo Horizonte, Minas Gerais, Brazil
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Bakkal M, Yılmaz B, Durmus A, Durmus Z, Ozalp S. Polymerization characteristics of colored compomers cured with different LED units. J Appl Biomater Funct Mater 2019; 17:2280800019827805. [DOI: 10.1177/2280800019827805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Incomplete polymerization of a resin material used for dental restoration affects the properties of the restoration. We evaluated the structural and mechanical properties of three different colored compomers cured with three different LED units to observe the characteristic changes occurring in different matches. Methods: Polytetrafluoroethylene molds (5 mm in diameter and 2 mm in thickness) were used to prepare disk-shaped sample specimens. Nine sample groups (each of five specimens) were prepared, three each of different compomer resin colors (gold, berry, and silver). Samples were cured using three different LED units (Optima, VALO, and Demi Ultra), according to the manufacturers’ instructions. Microstructural properties of samples were characterized by determining the degree of curing using Fourier-transform infrared spectroscopy and by analyzing sample morphology under a scanning electron microscope. The Vickers hardness, compressive strength, and elastic modulus of the samples were measured to investigate their mechanical properties. Results: The degrees of curing decreased in the order of silver > berry > gold for all curing units. Conversely, gold compomers exhibited poorer mechanical values than the berry and silver counterparts. The Optima 10 unit yielded slightly higher degrees of curing than the other devices, followed by Demi Ultra and VALO light-curing units, respectively. Conclusion: The resin color affected the structural and mechanical properties of the compomers, possibly as a result of the complex interactions and relationships between the irradiation light and resin material, such as light absorbance and reflectance; thus, depending on the color as well as the curing protocol.
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Affiliation(s)
- Meltem Bakkal
- Department of Pediatric Dentistry, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | - Berza Yılmaz
- Department of Orthodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | - Ali Durmus
- Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | | | - Serife Ozalp
- Department of Pediatric Dentistry, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
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Altan H, Goztas Z, Tosun G, Sarı T. Evaluation of Temperature Changes in the Pulpal Chamber of the Primary Tooth During Curing of Colored Compomers. CUMHURIYET DENTAL JOURNAL 2018. [DOI: 10.7126/cumudj.403044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Abstract
BACKGROUND Compomers are mostly used in primary dentition. The thermal conductivity properties of traditional or colored compomers have not been investigated in detail so far. The aim of this in vitro study was to assess and compare the thermal conductivities of traditional and colored compomers. METHOD Two sets of compomers - namely, Twinky Star (available in berry, lemon, green, silver, blue, pink, gold and orange shades) and Dyract Extra (available in B1, A3 and A2 shades) - were included in this study. All of the traditional and colored compomers were applied to standard molds and polymerized according to the manufacturers' instructions. Three samples were prepared from each compomer. Measurements were conducted using a heat conduction test setup, and the coefficient of heat conductivity was calculated for each material. The heat conductivity coefficients were statistically analyzed using Kruskal-Wallis and Duncan tests. Uncertainty analysis was also performed on the calculated coefficients of heat conductivity. RESULTS Statistically significant differences were found (p<0.05) between the thermal conductivity properties of the traditional and colored compomers examined. Among all of the tested compomers, the silver shade compomer exhibited the highest coefficient of heat conductivity (p<0.05), while the berry shade exhibited the lowest coefficient (p<0.05). Uncertainty analyses revealed that 6 out of 11 samples showed significant differences. CONCLUSIONS The silver shade compomer should be avoided in deep cavities. The material properties could be improved for colored compomers.
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Rajavardhan K, Sankar AJS, Kumar MGM, Kumar KR, Pranitha K, Kishore KK. Erosive potential of cola and orange fruit juice on tooth colored restorative materials. Ann Med Health Sci Res 2014; 4:S208-12. [PMID: 25364590 PMCID: PMC4212378 DOI: 10.4103/2141-9248.141960] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Erosion is a common condition which manifests due to consumption of high caloric and low pH acidic food stuffs such as carbonated drinks and fruit juices which cause irreversible damage to dental hard tissues and early deterioration of the dental restorations. AIM The main aim of this study is to evaluate and to compare the erosive potential of carbonated drink (cola) and fruit juice (orange fruit juice) by measuring the surface roughness (Ra) values on two commonly used dental restorative materials. MATERIALS AND METHODS A total of 36 specimens each were prepared using both testing materials, compomer (Group I) and giomer (Group II). Six specimens in each group were discarded due to wide variation in pre exposed Ra values and the remaining 30 specimens in each group were further sub divided into 10 samples each according to the testing media used. Immersion regime was followed according to Von Fraunhofer and Rogers. The pre and post immersion surface roughness values were recorded using a profilometer. RESULTS Both tested materials showed statistically-significant surface erosion (P < 0.01) when exposed to cola and orange fruit juice than the control group (water). DISCUSSION Compomer showed more surface roughness when compared to giomer when exposed to the three tested media which can be attributed to the variation in filler content, decomposition of resin matrix and fallout of the fillers in composites when exposed to acidic drinks. Other factors responsible for this significant erosion were also discussed. CONCLUSIONS Significant surface changes of the dental restorative materials can take place when exposed to low pH drinks for a prolonged period.
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Affiliation(s)
- K Rajavardhan
- Department of Pedodontics and Preventive Dentistry, Sibar Institute of Dental Sciences, Guntur, India
| | - AJS Sankar
- Department of Pedodontics and Preventive Dentistry, Sibar Institute of Dental Sciences, Guntur, India
| | - MGM Kumar
- Department of Pedodontics and Preventive Dentistry, S. V. S. Dental College, Mehaboobnagar, India
| | - KR Kumar
- Department of Pedodontics and Preventive Dentistry, St. Joseph's Dental College, Eluru, Andhra Pradesh, India
| | - K Pranitha
- Department of Pedodontics and Preventive Dentistry, Sibar Institute of Dental Sciences, Guntur, India
| | - KK Kishore
- Department of Prosthodontics, Sibar Institute of Dental Sciences, Guntur, India
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Effects of protective resin coating on the surface roughness and color stability of resin-based restorative materials. ScientificWorldJournal 2014; 2014:832947. [PMID: 25162066 PMCID: PMC4139090 DOI: 10.1155/2014/832947] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 07/16/2014] [Indexed: 02/06/2023] Open
Abstract
The aim of this study was to evaluate the effects of nanofilled protective resin coating (RC) on the surface roughness (Ra) and color stability (ΔE) of resin-based restorative materials (RM) (compomer (C), nanofilled composite (NF), and microhybrid composite (MH)) after being submitted to the ultraviolet aging (UV) method. Thirty-six specimens were prepared (n = 6 for each group). The Ra and (ΔE) values and SEM images were obtained before and after UV. Significant interactions were found among the RM-RC-UV procedures for Ra
(P < 0.001). After the specimens were submitted to UV, the Ra values were significantly increased, regardless of the RC procedure (with RC; P < 0.01 for all, without RC; C (P < 0.01), NF (P < 0.001), and MH (P < 0.001)) for each RM. Significant interactions were found between the RM-RC (P < 0.001) procedures for the ΔE values. The ΔE values were increased in each group after applying the RC procedures (P < 0.001). Protective RC usage for RM could result in material-related differences in Ra and ΔE as with used UV method.
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