Effect of Preheating on the Mechanical Properties of Resin Composites

Overview

Journal Eur J Dent

Publisher Thieme

Specialty Dentistry

Date 2009 Feb 13

PMID 19212532

Citations 14

Authors

Mine Betul Uctasli

Hacer Deniz Arisu

Lippo Vj Lasilla

Pekka K Valittu

Affiliations

Soon will be listed here.

Abstract

Objectives: The purpose of this study was to compare the flexural strength and modulus of two commercial resin composites, at room temperature and 40, 45 and 50 degrees C prior to light polymerization with standard and step-cure protocols.

Methods: One nanohybrid (Grandio, VOCO, Cuxhaven, Germany), and microhybrid composite resin (Filtek Z250, 3M ESPE, St. Paul, MN, USA) were used. The materials were inserted into rectangular moulds at room temperature or preheated to a temperature of 40, 45 or 50 degrees C and cured with standard or step-cure protocols with high intensity halogen (Elipar Highlight, 3M-ESPE, St. Paul, MN, USA). Ten specimens were prepared for each preheating and light curing protocol. A three-point bending test was performed using a universal testing machine at a crosshead speed of 1 mm/min. The data were analyzed by one-way analysis of variance and Tukey's post hoc tests (P<.05) to examine the effect of curing protocol and preheating. Pearson's correlation test was used to determine the correlation between tested mechanical properties and preheating.

Results: There were no statistically significant difference between tested mechanical properties of the materials, curing protocols and temperature of the materials. No significant correlation was found between preheating and tested mechanical properties.

Conclusions: The mechanical properties of the tested materials did not changed by preheating so the tested materials could be preheated because of the other potential clinical advantages like more adaptation to the cavity walls.

Citing Articles

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Effects of pre-heating on physical-mechanical-chemical properties of contemporary resin composites.

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Impact of repeated preheating of bulk-fill resin composite on postoperative hypersensitivity; a randomized controlled clinical trial.

Elkady M, Abdelhakim S, Riad M BMC Oral Health. 2024; 24(1):453.

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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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Pre-Heating of Low-Shrinkage Composite Resins: Effects on Color Stability and Surface Roughness.

Alizadeh Oskoee P, Savadi Oskoee S, Pournaghi-Azar F, Dibazar S, Esmaeili M Front Dent. 2022; 19:26.

PMID: 36458276 PMC: 9675621. DOI: 10.18502/fid.v19i26.10597.

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