Physical properties of vanillin incorporated self-curing orthodontic polymethylmethacrylate resin

Thongchai Poonpiriya, Pornrachanee Sawaengkit, Sroisiri Thaweboon, Pornkiat Churnjitapirom

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Polymethylmethacrylate (PMMA) resin is the main polymeric material used in removable orthodontic appliances. However, it can promote the adhesion of microbes due to its surface porosity and from long-term use. While vanillin incorporated PMMA resin has been reported to have antimicrobial effects against Candida albicans, the influence of vanillin incorporation on the physical properties of self-curing orthodontic PMMA resin has not been studied. Objective: To determine the flexural strength and flexural modulus of self-curing orthodontic PMMA resin incorporated with vanillin in different concentrations. Materials and methods: Three groups of self-curing orthodontic PMMA with incorporated vanillin concentrations of 0.1%, 0.5% as well as PMMA without vanillin as a control were prepared with ten specimens per group. Flexural strength and flexural modulus were tested by a 3-point bending machine according to ISO 20795-2:2013 specifications. One-way ANOVA and Tukey’s multiple comparison tests at a p<0.05 significance level were used to analyse the data. Results: The 0.1% vanillin incorporated group met ISO standard requirements (flexural strength = 60.48 MPa, flexural modulus = 1756.60 MPa), while the 0.5% vanillin incorporated group failed to pass this standard (flexural strength = 46.94 MPa, flexural modulus = 1423.49 MPa). The means of both flexural strength and flexural modulus showed significant differences among the three groups. Increasing the concentration of vanillin would decrease the flexural strength and flexural modulus of PMMA resin. Conclusion: The incorporation of vanillin into self-curing orthodontic PMMA resin can affect its physical properties, namely flexural strength and flexural modulus. At a concentration of 0.1% vanillin incorporation, PMMA resin displayed physical properties within the ISO standards.

Original languageEnglish
Title of host publicationAdvanced Materials Research X
EditorsAmanda F. Wu, Alan Kin Tak Lau
PublisherTrans Tech Publications Ltd
Pages46-50
Number of pages5
ISBN (Print)9783035716481
DOIs
Publication statusPublished - 2020
Event10th International Conference on Advanced Materials Research, ICAMR 2020 - Okinawa, Japan
Duration: 17 Jan 202020 Jan 2020

Publication series

NameKey Engineering Materials
Volume853 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference10th International Conference on Advanced Materials Research, ICAMR 2020
Country/TerritoryJapan
CityOkinawa
Period17/01/2020/01/20

Keywords

  • Flexural modulus
  • Flexural strength
  • PMMA
  • Physical properties
  • Vanillin

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