Keywords
Pit and fissure sealants
Curing lights, dental
How to Cite
Abstract
Aim: Resin modified glass ionomer (RMGI) is class of material that can be used as sealant for preventing and arresting the progression of caries in pits and fissures. As these are hybrid materials, their properties can be affected by factors related to the polymerization process. Therefore, this study aimed to evaluate the influence of different generations of LED curing units (Elipar DeepCure-L and VALO Grand) on Knoop microhardness values (KHN) of RMGI sealants (Clinpro XT and Vitremer). Methods: Forty cylindrical specimens (6mm ø x 1 mm high) were prepared according to the manufacturer’s instructions and divided into four groups (n=10) according to the type of RMGI and LED used. The KHN of the top surface of each sample was calculated 7 days after light-curing. Data were submitted to two-way ANOVA (α = 0.05). Results: Vitremer had higher KHN values than Clinpro XT after using both LEDs (p<0.0001), but especially when light-cured with the use of VALO Grand (p<0.0001). Whereas the KHN value of Clinpro was not influenced by the LED device (p>0.05). Conclusions: Top surface microhardness values of RGMI sealants were affected by both material composition and generations of LED curing units used. Third generation LED curing units seemed to be more efficient for the polymerization of RMGI-based sealants.
References
Naaman R, El-Housseiny AA, Alamoudi N. the use of pit and fissure sealants-a literature review. Dent J (Basel). 2017;5(4):34. doi: 10.3390/dj5040034.
Bani M, Tirali RE. Effect of new light curing units on microleakage and microhardness of resin sealants. Dent Mater J. 2016;35(3):517-22. doi: 10.4012/dmj.2015-357.
Borges BCD, Souza-Junior EJ, Catelan A, Ambrosano GM, Paulillo LA, Aguiar FH. Impact of extended radiant exposure time on polymerization depth of fluoride-containing fissure sealer materials. Acta Odontol Latinoam. 2011;24(1):47-51.
Seixas G, Guiraldo SB, Lemos LVFM, Myaki SI, Balducci I, Moura S. Clinpro ™ XT Sealant Adhesion to the Occlusal Surface of Primary Molars: Longitudinal Evaluation. J Health Sci. 2018;20(2):112-8. doi: 10.17921/2447-8938.2018v20n2p112-118
Wright JT, Crall JJ, Fontana M, Gillette EJ, Nov´y BB, Dhar V, et al. Evidence-based clinical practice guideline for the use of pit-and-fissure sealants: a report of the American Dental Association and the American Academy of Pediatric Dentistry. J Am Dent Assoc. 2016;147(8):672-82.e12. doi: 10.1016/j.adaj.2016.06.001.
Ahovuo-Saloranta A, Forss H, Walsh T, Nordblad A, MakelaM, Worthington HV. Pit and fissure sealants for preventing dental decay in permanent teeth. Cochrane Database Syst Rev. 2017;7(7):CD001830. doi: 10.1002/14651858.CD001830.pub5.
Colombo S, Beretta M. Dental Sealants Part 3: Which material? Efficiency and effectiveness. Eur J Paediatr Dent. 2018;19(3):247-9. doi: 10.23804/ejpd.2018.19.03.15.
Zaazou MH, Nagi SM. Effect of light curing on micro-hardness of resin-modified versus conventional glass ionomer restoration as a function of depth and time. J Appl Sci Res. 2013;9(8):5277-82.
Gonulol N, Ozer S, Tunc ES. Effect of a third-generation LED LCU on microhardness of tooth-colored restorative materials. Int J Paediatr Dent. 2016;26(5):376-82. doi: 10.1111/ipd.12213.
Lawson NC, Cakir D, Beck P, Ramp L, Burgess JO. Effect of light activation on resin-modified glass ionomer shear bond strength. Oper Dent. 2012;37(4):380-5. doi: 10.2341/11-212-L.
Alpöz AR, Ertugrul F, Cogulu D, Ak AT, Tanoglu M, Kaya E. Effects of light curing method and exposure time on mechanical properties of resin based dental materials. Eur J Dent. 2008;2(1):37-42.
Price RBT. Light curing in dentistry. Dent Clin North Am. 2017;61(4):751-78. doi: 10.1016/j.cden.2017.06.008.
Tosun G, Ozturk N, Sener Y, Gunduz B. Effect of light curing units and storage time on the degree of conversion of fissure sealants. Rev Clín Pesq Odontol. 2009;5(2):111-9. doi: 10.7213/aor.v5i2.23246.
Borges BCD, Bezerra GVG, Mesquita JA, Pereira MR, Aguiar FHB, Santos AJS, et al. Effect of irradiation times on the polymerization depth of contemporary fissure sealants with different opacities. Braz Oral Res. 2011;25(2):135-42. doi: 10.1590/S1806-83242011000200007.
Reddy VR, Chowdhary N, Mukunda K, Kiran N, Kavyarani B, Pradeep M. Retention of resin-based filled and unfilled pit and fissure sealants: a comparative clinical study. Contemp Clin Dent. 2015 Mar;6(Suppl 1):S18-23. doi: 10.4103/0976-237X.152932.
Price RB, Ferracane JL, Shortall AC. Light-Curing Units: a review of what we need to know. J Dent Res. 2015;94(9):1179-86. doi: 10.1177/0022034515594786.
Soares CJ, Rodrigues MP, Oliveira LRS, Braga SSL, Barcelos LM, Silva GR, et al. An evaluation of the light output from 22 contemporary light curing units. Braz Dent J. 2017;28(3):362-71. doi: 10.1590/0103-6440201601466.
Cefaly DFG, Mello LLCP, Wang L, Lauris JRP, D’Alpino PHP. Effect of Light Curing unit on resin-modified glass-ionomer cements: a microhardness assessment. J Appl Oral Sci. 2009;17(3):150-4. doi: 10.1590/S1678-77572009000300004.
Holroyd M, Ilie N. Effects of exposure time and exposure distance on the degree of cure in light-activated pit and fissure sealants. J Dent. 2013;41(12):1222-8. doi: 10.1016/j.jdent.2013.10.005.
Carvalho FG, Sampaio CS, Fucio SB, Carlo HL, Correr-Sobrinho L, Puppin-Rontani RM. Effect of chemical and mechanical degradation on surface roughness of three glass ionomers and a nanofilled resin composite. Oper Dent. 2012;37(5):509-17. doi: 10.2341/10-406-L.
Beun S, Bailly C, Devaux J, Leloup G. Rheological properties of flowable resin composites and pit and fissure sealants. Dent Mater. 2008;24(4):548-55. doi: 10.1016/j.dental.2007.05.019.
Yue C, Tantbirojn D, Grothe RL, Versluis A, Hodges JS, Feigal RJ. The depth of cure of clear versus opaque sealants as influenced by curing regimens. J Am Dent Assoc. 2009;140(3):331-8. doi: 10.14219/jada.archive.2009.0163.
Kim YK, Kim K-H, Kwon TY. Setting Reaction of Dental Resin-Modified Glass Ionomer Restoratives as a Function of Curing Depth and Postirradiation Time. J Spectrosc (Hindawi). 2015;2015:1-8. doi: 10.1155/2015/462687.
Roberts HW, Berzins DW, Charlton DG. Hardness of three resin-modified glass-ionomer restorative materials as a function of depth and time. J Esthet Restor Dent. 2009;21(4):262-72. doi: 10.1111/j.1708-8240.2009.00273.x
Rafeek RN. The effects of heat treatment on selected properties of a conventional and a resin-modified glass ionomer cement. J Mater Sci Mater Med. 2008;19:1913-20. doi: 10.1007/s10856-007-3270-8.
Kleverlaan CJ, van Duinen RN, Feilzer AJ. Mechanical properties of glass ionomer cements affected by curing methods. Dent Mater. 2004;20(1):45-50. doi: 10.1016/s0109-5641(03)00067-8.
Tolidis K, Dionysopoulos D, Gerasimou P, Sfeikos T. Effect of radiant heat and ultrasound on fluoride release and surface hardness of glass ionomer cements. J Appl Biomater Funct Mater. 2016;14(4):e463-9. doi: 10.5301/jabfm.5000292.
Gorseta K, Skrinjarić T, Glavina D. The effect of heating and ultrasound on the shear bond strength of glass ionomer cement. Coll Antropol. 2012;36(4):1307-12.
Dobrzynski M, Herman K, Bryla E, Fita K, Dudek K, Kowalczyk-Zajac M, et al. The heat risk during hardening of dental glass-ionomer cements using a light-curing. J Therm Anal Calorim. 2019;135(6):3123-8. doi: 10.1007/s10973-018-7504-4.
Mathias C, Gomes RS, Dressano D, Braga RR, Aguiar FHB, Marchi GM. Effect of diphenyliodonium hexafluorophosphate salt on experimental infiltrants containing different diluents. Odontology. 2019;107(2):202-8. doi: 10.1007/s10266-018-0391-0.
Ogliari FA, Ely C, Petzhold CL, Demarco FF, Piva E. Onium salt improves the polymerization kinetics in an experimental dental adhesive resin. J Dent. 2007;35(7):583-7. doi: 10.1016/j.jdent.2007.04.001.
Gonçalves LS, Moraes RR, Ogliari FA, Boaro L, Braga RR, Consani S. Improved polymerization efficiency of methacrylate-based cements containing an iodonium salt. Dent Mater. 2013;29(12):1251-5. doi: 10.1016/j.dental.2013.09.010.
Augusto CR, Leitune VCB, Ogliari FA, Collares FM. Influence of an iodonium salt on the properties of dual-polymerizing self-adhesive resin cements. J Prosthet Dent. 2017 Aug;118(2):228-34. doi: 10.1016/j.prosdent.2016.10.013.
Shimokawa CAK, Turbino ML, Giannini M, Braga RR, Price RB. Effect of light curing units on the polymerization of bulk fill resin-based composites. Dent Mater. 2018;34(8):1211-21. doi: 10.1016/j.dental.2018.05.002.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2021 Joyce Figueiredo de Lima Marques, Laura Nobre Ferraz, Beatriz Kelly Barros Lopes, Tamires Aparecida Borges Vasconcelos, Thiely Roberts Teixeira, Débora Alves Nunes Leite Lima, Flávio Henrique Baggio Aguiar, Diogo de Azevedo Miranda
Downloads
