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ORIGINAL STUDY COMPETITION
Year : 2018  |  Volume : 18  |  Issue : 5  |  Page : 16-17

OSC22: Comparative study of flexural and compressive strength of flexible dentures


Date of Web Publication31-Oct-2018

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DOI: 10.4103/0972-4052.244612

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How to cite this article:
... OSC22: Comparative study of flexural and compressive strength of flexible dentures. J Indian Prosthodont Soc 2018;18, Suppl S1:16-7

How to cite this URL:
... OSC22: Comparative study of flexural and compressive strength of flexible dentures. J Indian Prosthodont Soc [serial online] 2018 [cited 2018 Nov 20];18, Suppl S1:16-7. Available from: http://www.j-ips.org/text.asp?2018/18/5/16/244612



Eric Lee Sher Xin, Zaihan Ariffin, Yanti Johari

School of Dental Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang, Kerian, Kelantan, Malaysia.

Poly-methyl methacrylate (PMMA) has been used as a denture base material despite having several downsides such as brittleness, difficult insertion, possible source of allergen and others. The continual striving for better denture base materials has led to the utilization of flexible nylon-based materials such as polyamide to construct denture bases recently.

Aim: The aim of this study was to evaluate and compare the flexural and compressive strengths of different types of flexible denture materials.

Materials & Methods: A silicone master mould was made according to ADA specification no. 12 measuring 65mmx10mmx3mm for evaluation of flexural strength, whereas sprues of 4mm diameter were used to produce samples for compressive strength test. A total of 48 samples for flexible materials, 12 from each type: Breflex (BredentTM, United Kingdom) and Flexifast (SabilexTM, Argentina) were fabricated using injection molded process. 24 samples of Implacryl (VertexTM-Dental, Netherlands) were also fabricated using compression molded process as control group. Non-parametric test, Kruskal-Wallis test and Mann-Whitney U test were used to compare between the different groups.

Results: Results showed that Flexifast and Breflex have similar flexural strengths (p=0.410 >0.05), whereas Implacryl has significantly higher strength (p<0.05). The compressive strength test showed significantly different strengths (p<0.05), with Flexifast being the lowest, followed by Breflex, Implacryl showed the highest compressive strength.

Conclusion: In conclusion, the study showed that, Implacryl has the highest flexural strength and compressive strength. Flexifast and Breflex have similar flexural strengths but Flexifast has lower compressive strength than Breflex.






 

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