Effect of Pre-heating on the Mechanical Properties of Silorane-based and Methacrylate-based Composites

Overview

Journal J Clin Exp Dent

Specialty Dentistry

Date 2016 Oct 6

PMID 27703604

Citations 9

Authors

Narmin Mohammadi

Elmira Jafari-Navimipour

Soodabeh Kimyai

Amir-Ahmad Ajami

Mahmoud Bahari

Mohammad Ansarin

Mahsa Ansarin

Affiliations

Soon will be listed here.

Abstract

Background: The use of composites in dental restoration has been commonly criticized, due to their underwhelming mechanical properties. This problem may be solved partially by preheating. The present research aims to determine the effect of preheating on the mechanical properties of two different classes of composites.

Material And Methods: A Silorane-based (Silorane) and a Methacrylate-based (Z250) composite were preheated to different temperatures (25, 37, and 68 °C) and afterwards were tested with the appropriate devices for each testing protocol. The material's flexural strength, elastic modulus, and Vickers microhardness were evaluated. Two-way ANOVA, and Tukey's post hoc were used to analyze the data.

Results: Microhardness and elastic modulus increased with preheating, while flexural strength values did not increase significantly with preheating. Furthermore the methacrylate-based composite (Z250) showed higher values compared to the Silorane-based composite (Silorane) in all the tested properties.

Conclusions: Preheating Silorane enhances the composite's microhardness and elastic modulus but does not affect its flexural strength. On the other hand, preheating Z250 increases its microhardness but does not change its flexural strength or elastic modulus. In addition, the Z250 composite shows higher microhardness and flexural strength than Silorane, but the elastic modulus values with preheating are similar. Therefore Z250 seems to have better mechanical properties making it the better choice in a clinical situation. Composite, elastic modulus, flexural strength, microhardness, preheating.

Citing Articles

Comparative Evaluation of Sonic Vibration and Heat Preheating Techniques on the Retention and Efficacy of Flowable Composite Resin Sealants: A Quasi-experimental Study.

Singh S, Yeluri R, Yeluri G, Perveen Z, Rajput D, Malik R Cureus. 2025; 16(12):e76661.

PMID: 39898133 PMC: 11781895. DOI: 10.7759/cureus.76661.

Examining the Impact of Preheating on the Fracture Toughness and Microhardness of Composite Resin: A Systematic Review.

Bhopatkar J, Ikhar A, Chandak M, Patel A, Agrawal P Cureus. 2023; 15(10):e47117.

PMID: 38022172 PMC: 10647940. DOI: 10.7759/cureus.47117.

Comparison of the effect of preheating on the flexural strength of giomer and nanohybrid composite resin.

Kimyai S, Mashayekhi Z, Mohammadi N, Bahari M, Abed Kahnamouei M, Ebrahimi Chaharom M J Dent Res Dent Clin Dent Prospects. 2023; 16(3):159-163.

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Composite Pre-heating: A Novel Approach in Restorative Dentistry.

Bhopatkar J, Ikhar A, Chandak M, Mankar N, Sedani S Cureus. 2022; 14(7):e27151.

PMID: 36004030 PMC: 9392864. DOI: 10.7759/cureus.27151.

Comparison of Mechanical Properties of a Self-Adhesive Composite Cement and a Heated Composite Material.

Skapska A, Komorek Z, Cierech M, Mierzwinska-Nastalska E Polymers (Basel). 2022; 14(13).

PMID: 35808732 PMC: 9269425. DOI: 10.3390/polym14132686.

References

Lovell L, Newman S, Bowman C . The effects of light intensity, temperature, and comonomer composition on the polymerization behavior of dimethacrylate dental resins. J Dent Res. 1999; 78(8):1469-76. DOI: 10.1177/00220345990780081301. View

Lovell L, Lu H, Elliott J, Stansbury J, Bowman C . The effect of cure rate on the mechanical properties of dental resins. Dent Mater. 2001; 17(6):504-11. DOI: 10.1016/s0109-5641(01)00010-0. View

Daronch M, Rueggeberg F, de Goes M, Giudici R . Polymerization kinetics of pre-heated composite. J Dent Res. 2005; 85(1):38-43. DOI: 10.1177/154405910608500106. View

Lucey S, Lynch C, Ray N, Burke F, Hannigan A . Effect of pre-heating on the viscosity and microhardness of a resin composite. J Oral Rehabil. 2010; 37(4):278-82. DOI: 10.1111/j.1365-2842.2009.02045.x. View

Deb S, Di Silvio L, Mackler H, Millar B . Pre-warming of dental composites. Dent Mater. 2010; 27(4):e51-9. DOI: 10.1016/j.dental.2010.11.009. View

Amirouche-Korichi A, Mouzali M, Watts D . Effects of monomer ratios and highly radiopaque fillers on degree of conversion and shrinkage-strain of dental resin composites. Dent Mater. 2009; 25(11):1411-8. DOI: 10.1016/j.dental.2009.06.009. View

Watts D, Al Hindi A . Intrinsic 'soft-start' polymerisation shrinkage-kinetics in an acrylate-based resin-composite. Dent Mater. 1999; 15(1):39-45. DOI: 10.1016/s0109-5641(99)00012-3. View

Sarrett D . Clinical challenges and the relevance of materials testing for posterior composite restorations. Dent Mater. 2005; 21(1):9-20. DOI: 10.1016/j.dental.2004.10.001. View

Uctasli M, Deniz Arisu H, Lasilla L, Valittu P . Effect of preheating on the mechanical properties of resin composites. Eur J Dent. 2009; 2(4):263-8. PMC: 2634780. View

10.

Wagner W, Aksu M, Asku M, Neme A, Linger J, Pink F . Effect of pre-heating resin composite on restoration microleakage. Oper Dent. 2008; 33(1):72-8. DOI: 10.2341/07-41. View

11.

Manhart J, Kunzelmann K, Chen H, Hickel R . Mechanical properties and wear behavior of light-cured packable composite resins. Dent Mater. 2001; 16(1):33-40. DOI: 10.1016/s0109-5641(99)00082-2. View

12.

Nada K, El-Mowafy O . Effect of precuring warming on mechanical properties of restorative composites. Int J Dent. 2011; 2011:536212. PMC: 3205608. DOI: 10.1155/2011/536212. View

13.

Elsayad I . Cuspal movement and gap formation in premolars restored with preheated resin composite. Oper Dent. 2009; 34(6):725-31. DOI: 10.2341/09-012-L. View

14.

Christensen G . Should resin-based composite dominate restorative dentistry today?. J Am Dent Assoc. 2010; 141(12):1490-3. DOI: 10.14219/jada.archive.2010.0112. View

15.

Al-Sharaa K, Watts D . Stickiness prior to setting of some light cured resin-composites. Dent Mater. 2003; 19(3):182-7. DOI: 10.1016/s0109-5641(02)00097-0. View

16.

El-Korashy D . Post-gel shrinkage strain and degree of conversion of preheated resin composite cured using different regimens. Oper Dent. 2010; 35(2):172-9. DOI: 10.2341/09-072-L. View

17.

Froes-Salgado N, Silva L, Kawano Y, Francci C, Reis A, Loguercio A . Composite pre-heating: effects on marginal adaptation, degree of conversion and mechanical properties. Dent Mater. 2010; 26(9):908-14. DOI: 10.1016/j.dental.2010.03.023. View

18.

Munoz C, Bond P, Sy-Munoz J, Tan D, Peterson J . Effect of pre-heating on depth of cure and surface hardness of light-polymerized resin composites. Am J Dent. 2008; 21(4):215-22. View

19.

Ahn K, Lim S, Kum K, Chang S . Effect of preheating on the viscoelastic properties of dental composite under different deformation conditions. Dent Mater J. 2015; 34(5):702-6. DOI: 10.4012/dmj.2015-042. View

20.

Choudhary N, Kamat S, Mangala T, Thomas M . Effect of pre-heating composite resin on gap formation at three different temperatures. J Conserv Dent. 2011; 14(2):191-5. PMC: 3146116. DOI: 10.4103/0972-0707.82618. View