Ön ısıtmanın yığın dolgulu reçine kompozitlerin mikrosertliği ve eğilme mukavemeti üzerindeki etkisi: in vitro bir çalışma

Year 2024, Volume: 58 Issue: 3, 133 - 138, 20.09.2024

Mehdi Abed Kahnamouei , Mahmoud Bahari , Mohammad Esmaeel Ebrahimi Chaharom , Soodabeh Kimyai , Mehdi Daneshpooy , Katayoun Katebi , Bahareh Elhami

https://doi.org/10.26650/eor.20231302012

Abstract

Amaç: Bu çalışmanın amacı, ön ısıtmanın yığın dolgulu reçine kompozitlerin mikrosertliği ve eğilme mukavemeti üzerindeki etkisini değerlendirmektir.

Gereç ve Yöntem: Bu in vitro çalışmada, X-tra fil ve Opus Bulk Fill kompozitlerinin her birinden kırk iki örnek hazırlandı; sonuçta mikro sertlik testi için 84 disk şeklinde örnek ve eğilme mukavemeti analizi için 84 çubuk şeklinde örnek elde edildi. Örnekler şu şekilde dört gruba ayrıldı: Grup 1: Ön ısıtmalı X-tra fil kompozit (68°C'de 15 dakika), grup 2: Ön ısıtmasız X-tra fil kompozit (oda sıcaklığında), grup 3: Opus Aynı ön ısıtma yöntemine sahip Bulk Fill kompoziti, grup 4: Ön ısıtmasız Opus Bulk Fill kompoziti. Mikro sertlik, elmas uçlu Vickers testi kullanılarak değerlendirildi ve bükülme mukavemeti, 3 noktalı bükülme testi kullanılarak ölçüldü. Hesaplanan sonuçlar üzerinde istatistiksel karşılaştırmalar yapıldı.

Bulgular: Ön ısıtmalı gruplarda hem Xtra fil hem de Opus Bulk Fill kompozitleri, ön ısıtmasız gruplarla karşılaştırıldığında önemli ölçüde daha yüksek ortalama eğilme mukavemeti sergiledi (p<0.001). Ancak her iki kompozit türü için de iki grup arasında ortalama mikrosertlik açısından anlamlı bir fark yoktu (p=0,719). Ayrıca, X-tra fil kompozitinin ortalama eğilme mukavemeti ve mikrosertliği, hem ön ısıtmalı hem de ön ısıtmasız koşullarda, Opus Bulk Fill kompozitininkinden daha yüksekti (p<0.001).

Sonuç: Bulk-fill kompozitlerin 68°C'ye kadar önceden ısıtılmasının mikrosertlikleri üzerinde zararlı bir etkisi yoktur ve bu malzemelerin eğilme mukavemetini arttırır. Ayrıca, toplu dolgulu kompozitlerdeki mikro sertlik ve bükülme mukavemetinin derecesi markalar arasında farklılık gösterir ve kimyasal bileşimlerinden etkilenir.

Keywords

kompozit reçineler, ısıtma, xtra fil kompozit reçine, vickers testi, mikrosertlik

Project Number

67547

The effect of preheating on microhardness and flexural strength of bulk-fill resin composites: an in-vitro study

Abstract

Purpose: The objective of this study was to assess the impact of preheating on the microhardness and flexural strength of bulk-fill resin composites.

Materials and Methods: In this in vitro study, forty-two specimens were prepared of each composite, X-tra fil and Opus Bulk Fill, resulting in 84 disk-shaped specimens for microhardness testing and 84 bar-shaped specimens for flexural strength analysis. The specimens were divided into four groups as follows: Group 1: X-tra fil composite with preheating (at 68°C for 15 minutes), group 2: X-tra fil composite without preheating (at room temperature), group 3: Opus Bulk Fill composite with the same preheating method, group 4: Opus Bulk Fill composite without preheating. Microhardness was assessed using the Vickers test with a diamond indenter, and flexural strength was measured using a 3-point flexural test. Statistical comparisons were performed on the calculated results.

Results: In the preheated groups, both X-tra fil and Opus Bulk Fill composites exhibited significantly higher mean flexural strength compared to the non-preheated groups (p<0.001). However, there was no significant difference in the mean microhardness between the two groups for either type of composite (p=0.719). Additionally, the mean flexural strength and microhardness of X-tra fil composite, in both preheated and non-preheated conditions, were higher than those of the Opus Bulk Fill composite (p<0.001).

Conclusion: Preheating bulk-fill composites to 68°C has no detrimental effect on their microhardness and increases the flexural strength of these materials. Furthermore, the degree of microhardness and flexural strength in bulk-fill composites varies between brands and is influenced by their chemical compositions.

Keywords

composite resins, heating, x-tra fil composite resin, vickers test, microhardness

Supporting Institution

Dental and Periodontal Research Center, Tabriz University of medical sciences, Tabriz, Iran

Project Number

67547

Thanks

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References

• 1. Ersen KA, Gürbüz Ö, Özcan M. Evaluation of polymerization shrinkage of bulk-fill resin composites using microcomputed tomography. Clin Oral Investig 2020;24:1687-93. google scholar
• 2. Colombo M, Gallo S, Poggio C, Ricaldone V, Arciola CR, Scribante A. New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes. Materials (Basel) 2020;13:1308. google scholar
• 3. Ilie N. Resin-Based Bulk-Fill Composites: Tried and Tested, New Trends, and Evaluation Compared to Human Dentin. Materials (Basel) 2022;15:8095. google scholar
• 4. Behery H, El-Mowafy O, El-Badrawy W, Saleh B, Nabih S. Cuspal Deflection of Premolars Restored with Bulk-Fill Composite Resins. J Esthet Restor Dent 2016;28:122-30. google scholar
• 5. Demirel G, Orhan AI, Irmak Ö, Aydin F, Buyuksungur A, Bilecenoğlu B, et al. Microcomputed tomographic evaluation of the effects of pre-heating and sonic delivery on the internal void formation of bulk-fill composites. Dent Mater J 2021;40:525-31. google scholar
• 6. Didron PP, Ellakwa A, Swain MV. Effect of Preheat Temperatures on Mechanical Properties and Polymerization Contraction Stress of Dental Composites. Mater sci appl 2013;2013:374-85. google scholar
• 7. Marcondes RL, Lima VP, Barbon FJ, Isolan CP, Carvalho MA, Salvador MV, et al. Viscosity and thermal kinetics of 10 preheated restorative resin composites and effect of ultrasound energy on film thickness. Dent Mater 2020;36:1356-64. google scholar
• 8. Lopes LCP, Terada RSS, Tsuzuki FM, Giannini M, Hirata R. Heating and preheating of dental restorative materials-a systematic review. Clin Oral Investig 2020;24:4225-35. google scholar
• 9. Theodoridis M, Dionysopoulos D, Koliniotou-Koumpia E, Dionysopoulos P, Gerasimou P. Effect of preheating and shade on surface microhardness of silorane-based composites. J Investig Clin Dent 2017; 8. google scholar
• 10. Değirmenci A, Can DB. Pre-Heating effect on the microhardness and depth of cure of Bulk-Fill composite resins. Odovtos-Int J Dent Sc 2022;24:99-112. google scholar
• 11. Ribeiro MTH, de Bragança GF, Oliveira LRS, Braga SSL, de Oliveira HLQ, Price RB, et al. Effect of pre-heating methods and devices on the mechanical properties, post-gel shrinkage, and shrinkage stress of bulk-fill materials. J Mech Behav Biomed Mater 2023;138:105605. google scholar
• 12. Elkaffass AA, Eltoukhy RI, Elnegoly S A, Mahmoud SH. Influence of preheating on mechanical and surface properties of nanofilled resin composites. J Clin Exp Dent 2020;12:e494-500. google scholar
• 13. Deb S, Di Silvio L, Mackler HE, Millar BJ. Pre-warming of dental composites. Dent mater 2011;27:e51-9. google scholar
• 14. Jafarzadeh-Kashi TS, Fereidouni F, Khoshroo K, Heidari S, Masaeli R, Mohammadian M. Effect of preheating on the microhardness of nanohybrid resin-based composites. Front Biomed Technol 2015;2:15-22. google scholar
• 15. Suryawanshi A, Behera N. Dental composite resin: a review of major mechanical properties, measurements and its influencing factors. Mater Werkst 2022;53:617-35. google scholar
• 16. Abdulmajeed A, Donovan T, Cook R, Sulaiman T. Effect of preheating and fatiguing on mechanical properties of bulk-fill and conventional composite resin. Oper Dent 2020;45:387-95. google scholar
• 17. Theobaldo JD, Aguiar FHB, Pini NIP, Lima DANL, Liporoni PCS, Catelan A. Effect of preheating and light-curing unit on physicochemical properties of a bulk fill composite. Clin Cosmet Investig Dent 2017;9:39-43. google scholar
• 18. Lucey S, Lynch CD, Ray N, Burke F, Hannigan A. Effect of pre-heating on the viscosity and microhardness of a resin composite. J oral rehabil 2010;37:278-82. google scholar
• 19. Alrahlah A. Diametral Tensile Strength, Flexural Strength, and Surface Microhardness of Bioactive Bulk Fill Restorative. J Contemp Dent Pract 2018;19:13-9. google scholar
• 20. Nada K, El-Mowafy O. Effect of precuring warming on mechanical properties of restorative composites. Int J Dent 2011;2011:536212. google scholar
• 21. Kramer MR, Edelhoff D, Stawarczyk B. Flexural strength of preheated resin composites and bonding properties to glass-ceramic and dentin. Materials (Basel) 2016;9:83. google scholar
• 22. Alshali RZ, Salim NA, Satterthwaite JD, Silikas N. Post-irradiation hardness development, chemical softening, and thermal stability of bulk-fill and conventional resin-composites. J Dent 2015;43:209-18. google scholar
• 23. Nagi SM, Moharam LM, Zaazou MH. Effect of resin thickness, and curing time on the micro-hardness of bulk-fill resin composites. J Clin Exp Dent 2015;7:e600. google scholar
• 24. Gomes de Araujo-Neto V, Sebold M, Fernandes de Castro E, Feitosa VP, Giannini M. Evaluation of physico-mechanical properties and filler particles characterization of conventional, bulk-fill, and bioactive resin-based composites. J Mech Behav Biomed Mater 2021;115:104288. google scholar
• 25. ALShaafi MM, Haenel T, Sullivan B, Labrie D, Alqahtani MQ, Price RB. Effect of a broad-spectrum LED curing light on the Knoop microhardness of four posterior resin based composites at 2, 4 and 6-mm depths. J Dent 2016;45:14-8. google scholar
• 26. Chang M, Dennison J, Yaman P. Physical Property Evaluation of Four Composite Materials. Oper Dent 2013;38:E144-53. google scholar
• 27. Mota EG, Fulginiti RL, Prietsch DL, Barbosa GF, Oshima HM. The Influence of Testing Protocols on Microhardness Tests of Composite Resin with Different Viscosities. Oral Health Dent Manag 2014;13:1140-3. google scholar