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DOI :10.26650/eor.2018.469   IUP :10.26650/eor.2018.469    Full Text (PDF)

Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles

Pınar Çevik

Purpose
Little has been reported how the addition of nanoparticles could affect the hardness of maxillofacial silicones. The purpose of this study was to evaluate the effects of different types of nanoparticle additives and dark storage for 2-years on the Shore A hardness of two types of maxillofacial silicone elastomers. 

Materials and Methods 
A-2000 and A-2006 Room Temperature Vulcanized (RTV) silicone elastomers were tested in this study. Silaned silica, fumed silica and titanium dioxide nanoparticles at concentrations of 10% by volume were used as fillers for the maxillofacial silicone elastomers. A total of 64 silicone specimens were fabricated, which includes 8 samples, 30 x 10 mm in size, from each silicone elastomers for each subgroup and also controls. After the initial Shore A hardness measurements, specimens were kept in dark conditions at room temperature for 2 years. The final measurements were then taken from the silicone specimens. All data were statistically analyzed. 

Results
For both types of silicones, there was statistically significant differences among study groups (p<0.001). Fumed silica group showed the lowest hardness values in A-2000 after storage. However, no significant difference was observed between control and fumed silica groups. Control group showed the lowest hardness values in A-2006, while the highest hardness values were found in fumed silica group; there was no significant difference between silica and silane groups. 

Conclusion
Shore A values of the specimens were within the acceptable range for the maxillofacial silicones after aging. Nanoparticle addition did not prevent hardening of the silicone elastomers with time. 
Keywords: Aging, hardness, nanoparticles, silicone elastomers, Shore A

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APA

Çevik, P. (2018). Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles. European Oral Research, 52(2), 99-104. https://doi.org/10.26650/eor.2018.469


AMA

Çevik P. Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles. European Oral Research. 2018;52(2):99-104. https://doi.org/10.26650/eor.2018.469


ABNT

Çevik, P. Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles. European Oral Research, [Publisher Location], v. 52, n. 2, p. 99-104, 2018.


Chicago: Author-Date Style

Çevik, Pınar,. 2018. “Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles.” European Oral Research 52, no. 2: 99-104. https://doi.org/10.26650/eor.2018.469


Chicago: Humanities Style

Çevik, Pınar,. “Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles.” European Oral Research 52, no. 2 (Apr. 2024): 99-104. https://doi.org/10.26650/eor.2018.469


Harvard: Australian Style

Çevik, P 2018, 'Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles', European Oral Research, vol. 52, no. 2, pp. 99-104, viewed 27 Apr. 2024, https://doi.org/10.26650/eor.2018.469


Harvard: Author-Date Style

Çevik, P. (2018) ‘Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles’, European Oral Research, 52(2), pp. 99-104. https://doi.org/10.26650/eor.2018.469 (27 Apr. 2024).


MLA

Çevik, Pınar,. “Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles.” European Oral Research, vol. 52, no. 2, 2018, pp. 99-104. [Database Container], https://doi.org/10.26650/eor.2018.469


Vancouver

Çevik P. Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles. European Oral Research [Internet]. 27 Apr. 2024 [cited 27 Apr. 2024];52(2):99-104. Available from: https://doi.org/10.26650/eor.2018.469 doi: 10.26650/eor.2018.469


ISNAD

Çevik, Pınar. “Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles”. European Oral Research 52/2 (Apr. 2024): 99-104. https://doi.org/10.26650/eor.2018.469



TIMELINE


Submitted22.05.2017
Accepted25.07.2017
Published Online01.05.2018

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