Evaluation of the Effect of Fracture Line Type on Repair Resistance in Acrylic Resins Repaired with Graphene Oxide

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Basmacı F., Ünsal G., Aykent F.

Selcuk Dental Journal, vol.9, pp.527-532, 2022 (Peer-Reviewed Journal)

  • Publication Type: Article / Article
  • Volume: 9
  • Publication Date: 2022
  • Doi Number: 10.15311/selcukdentj.1134685)
  • Journal Name: Selcuk Dental Journal
  • Journal Indexes: TR DİZİN (ULAKBİM)
  • Page Numbers: pp.527-532
  • Ankara Yıldırım Beyazıt University Affiliated: Yes

Abstract

Evaluation of the Effect of Fracture Line Type on Repair Resistance in Acrylic Resins Repaired with Graphene Oxide Background: The aim of this study is to investigate the effect of different fracture line designs and gaps on the fracture strength of graphene oxide repaired polymethylmethacrylate (PMMA) resin specimens. Methods: Fifty standard wax specimens with the size of 65x10x3 mm were prepared using a metal mold. The prepared wax models were randomly divided into 5 groups (n=10); group 1: control group (no fracture line was created), group 2: fracture line with 0 mm gap and flat surface, group 3: 0 mm gap and 45° bevel fracture line, group 4: Fracture line with 2.5 mm gap and flat surface, group 5: 2.5 mm gap and 45° bevel fracture line. The fracture lines of the specimens were repaired by adding 2% graphene oxide to PMMA powder. A 3-point bending test was applied to the midpoint of the fracture line of specimens in all test groups with an universal testing machine with a cross head speed of 0.5 mm/min. Results were analyzed by ANOVA and Tukey HSD test for normally distributed flexural strength data. The resilience data that did not show normal distribution were evaluated with the Kruskal-Wallis H test. The pvalue of <0.05 was considered statistically significant. Results: The highest flexural strength value was obtained in the control group (123.92±13.99 MPa). The lowest value was recorded in group 4 (39.01±8.23 MPa). The flexural strength of the speciments with bevel fracture lines was found to be statistically significantly higher than the flexural strength of specimens with straight fracture lines, (p<0.05). After repairing a decrease was monitored in the resilience of the speciments, but it was not found statistically significant (p=0.083). Conclusion: The bevel fracture line of acrylic resin specimens repaired with graphene oxide provided a significant advantage in increasing the flexural strength compared to the straight fracture line.

KEYWORDS Acrylic resins, Fracture strength, Graphen oxide, Denture repair