Journal of Conservative Dentistry
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Year : 2015  |  Volume : 18  |  Issue : 3  |  Page : 214-217

Influence of different crosshead speeds on diametral tensile strength of a methacrylate based resin composite: An in-vitro study

1 Department of Conservative Dentistry and Endodontics, Bapuji Dental College and Hospital, Rajeev Gandhi University of Health Sciences, Davangere, Karnataka, India
2 Department of Conservative Dentistry and Endodontics, Indira Gandhi Institute of Dental Sciences, Sri Balaji Vidyapeeth University, Pondicherry, India

Correspondence Address:
Dr. Anubhav Sood
Lohna Colony, P.O. Bundla, Palampur, Kangra District, Himachal Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-0707.157253

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Aim: The aim was to evaluate the influence of different crosshead speeds on diametral tensile strength (DTS) of a resin composite material (Tetric N-Ceram). Materials and Methods: The DTS of Tetric N-Ceram was evaluated using four different crosshead speeds 0.5 mm/min (DTS 1), 1 mm/min (DTS 2), 5 mm/min (DTS 3), 10 mm/min (DTS 4). A total of 48 specimens were prepared and divided into four subgroups with 12 specimens in each group. Specimens were made using stainless steel split custom molds of dimensions 6 mm diameter and 3 mm height. The specimens were stored in distilled water at room temperature for 24 h. Universal testing machine was used and DTS values were calculated in MPa. Results: Analysis of variance was used to compare the four groups. Higher mean DTS value was recorded in DTS 2 followed by DTS 4, DTS 1, and DTS 3, respectively. However, the difference in mean tensile strength between the groups was not statistically significant (P > 0.05). Conclusion: The crosshead speed variation between 0.5 and 10 mm/min does not seem to influence the DTS of a resin composite. EGCG at the studied concentrations were not effective in eliminating S. mutans from dentin caries-like lesions.

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