Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth
Basma M Nagi, Dalia I El-Korashy, Amin El-S Amin, Amr M Abdelaziz, Reham K Elghazawy
Keywords :
Bulk fill composite, Glass ionomer, Ionizing radiation, Radiotherapy
Citation Information :
Nagi BM, El-Korashy DI, Amin AE, Abdelaziz AM, Elghazawy RK. Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth. Int J Clin Pediatr Dent 2023; 16 (5):758-762.
Aim: The purpose of this in vitro study was to evaluate the effect of radiotherapy on flexural strength, microhardness, and surface roughness of bulk fill composite (X-tra fil) and glass ionomer (EQUIA Forte HT).
Materials and methods: A total of 40 specimens were prepared for each test and were divided into two groups according to the material used (composite or glass ionomer cement), and each group was divided into two subgroups (n = 10) according to radiation condition, irradiated subgroup, subjected to 50 Gy by multienergy linear accelerator delivered in one shot and control subgroup.
Results: Control samples of flexural strength and microhardness had a significantly higher value than irradiated samples in both materials. Regarding the surface roughness, irradiated samples had a significantly higher value than the control samples in both materials.
Conclusion: Irradiation with a linear accelerator had a negative impact on the flexural strength and microhardness of both materials. Moreover, it increased the surface roughness for both materials. Bulk fill composite is the dental restorative material of choice in head and neck cancer patients undergoing radiotherapy due to its high mechanical properties before and after radiation.
Raney RB, Anderson JR, Kollath J, et al. Late effects of therapy in 94 patients with localized rhabdomyosarcoma of the orbit: report from the Intergroup Rhabdomyosarcoma Study (IRS)—III, 1984-1991. Med Pediatr Oncol 2000;34(6):413–420. DOI: 10.1002/(sici)1096-911x(200006)34:6<413::aid-mpo6>3.0.co;2-4
Otmani N. Oral and maxillofacial side effects of radiation therapy on children. J Can Dent Assoc 2007;73(3):257–261.
Kielbassa AM, Hinkelbein W, Hellwig E, et al. Radiation-related damage to dentition. Lancet Oncol 2006;7(4):326–335. DOI: 10.1016/S1470-2045(06)70658-1
Joshi VK. Dental treatment planning and management for the mouth cancer patient. Oral Oncol 2010;46(6):475–479. DOI: 10.1016/j.oraloncology.2010.03.010
Silva AR, Alves FA, Berger SB, et al. Radiation-related caries and early restoration failure in head and neck cancer patients. A polarized light microscopy and scanning electron microscopy study. Support Care Cancer 2010;18(1):83–87. DOI: 10.1007/s00520-009-0633-3
Al-Nawas B, Grötz KA, Rose E, et al. Using ultrasound transmission velocity to analyse the mechanical properties of teeth after in vitro, in situ, and in vivo irradiation. Clin Oral Investig 2000;4(3):168–172. DOI: 10.1007/s007840000068
Soares CJ, Castro CG, Neiva NA, et al. Effect of gamma irradiation on ultimate tensile strength of enamel and dentin. J Dent Res 2010;89(2):159–164. DOI: 10.1177/0022034509351251
Reitemeier B, Reitemeier G, Schmidt A, et al. Evaluation of a device for attenuation of electron release from dental restorations in a therapeutic radiation field. J Prosthet Dent 2002;87(3):323–327. DOI: 10.1067/mpr.2002.122506
Catelan A, Padilha AC, Salzedas LM, et al. Effect of radiotherapy on the radiopacity and flexural strength of a composite resin. Acta Odontol Latinoam 2008;21(2):159–162.
Yap AU, Teoh SH. Comparison of flexural properties of composite restoratives using the iso and mini-flexural tests. J Oral Rehabil 2003;30(2):171–177. DOI: 10.1046/j.1365-2842.2003.01004.x
Viero FL, Boscolo FN, Demarco FF, et al. Effect of radiotherapy on the hardness and surface roughness of two composite resins. Gen Dent 2011;59(4):e168–e172.
Rodrigues Junior SA, Zanchi CH, Carvalho RV, et al. Flexural strength and modulus of elasticity of different types of resin-based composites. Braz Oral Res 2007;21(1):16–21. DOI: 10.1590/s1806-83242007000100003
Brandeburski SBN, Della Bona A. Effect of ionizing radiation on properties of restorative materials. Dent Mater 2018;34(2):221–227. DOI: 10.1016/j.dental.2017.10.006
Ugurlu M, Ozkan EE, Ozseven A. The effect of ionizing radiation on properties of fluoride-releasing restorative materials. Braz Oral Res 2020;34(3):1–13. DOI: 10.1590/1807-3107bor-2020.vol34.0005
Biscaro SL, Moraes RR, Correr AB, et al. Effect of X-ray radiation dose on the bond strength of different adhesive systems to dentin. J Adhes Dent 2009;11(5):355–360.
Dibo da Cruz A, Goncalves Lde S, Rastelli AN, et al. Bond strength of dental adhesive systems irradiated with ionizing radiation. J Adhes Dent 2010;12(2):123–128. DOI: 10.3290/j.jad.a17530
R Core Team (2020). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/.
Heintze SD, Zimmerli B. Relevance of in vitro tests of adhesive and composite, dental materialsa review in 3 parts. Part 1: approval requirements and standardized testing of composite materials according to ISO specifications. Schweiz Monatsschr Zahnmed 2011;121(9):804–816.
Chung SM, Yap AU, Chandra SP, et al. Flexural strength of dental composite restoratives: comparison of biaxial and three-point bending test. J Biomed Mater Res B Appl Biomater 2004;71(2):278–283. DOI: 10.1002/jbm.b.30103
Muench A, Correa IC, Grande RH, et al. The effect of specimen dimensions on the flexural strength of a composite resin. J Appl Oral Sci 2005;13(3):265–268. DOI: 10.1590/s1678-77572005000300012
Novais VR, Júnior PCS, Rodrigues RB, et al. Effect of irradiation on the mechanical behavior of restorative materials. Rev Odontol Bras Cent 2015;24(68):44–48.
Venturini D, Cenci MS, Demarco FF, et al. Effect of polishing techniques and time on surface roughness, hardness and microleakage of resin composite restorations. Oper Dent 2006;31(1):11–17. DOI: 10.2341/04-155
Reichmanis E, Frank CW, O'Donnell JH. Irradiation of polymeric materials : processes, mechanisms, and applications. Washington, DC: American Chemical Society; 1993; pp. 1–7.
E Lima RBW, De Vasconcelos LC, Pontual ML, et al. Effect of ionizing radiation on the properties of restorative materials. Indian J Dent Res 2019;30(3):408–413. DOI: 10.4103/ijdr.IJDR_72_17
Andreea B, Cristina M-V, Melinda S. The behaviour of composites, glass ionomers and compomers in erosive conditions – in vitro study. Acta Med Marisiensis 2014;60(5):200–203. DOI: 10.2478/amma-2014-0042
da Cruz AD, Sinhoreti MAC, Ambrosano GM, et al. Effect of therapeutic dose X rays on mechanical and chemical properties of esthetic dental materials. Mater Res 2008;11(3):313–318. DOI: 10.1590/S1516-14392008000300014
Campos LMP, Boaro LC, Santos LKG, et al. Influence of ionizing radiation on the mechanical properties of BisGMA/TEGDMA based experimental resin. Radiat Phys Chem 2015;115:30–35. DOI: 10.1016/j.radphyschem.2015.06.003
Eltohamy SS, Kandil MM, Refai DAEl. Head and neck cancer radiotherapy effect on some properties of different dental restorative materials : an in vitro study. J Res Med Dent Sci 2020;8(4):153–156.
