Alaa Al-Haddad1, Reza Vahid Roudsari2, Julian D Satterthwaite3. 1. Research Student, School of Dentistry, The University of Manchester, Higher Cambridge Street, Manchester M13 9PL, United Kingdom. 2. Clinical Lecturer and Honorary Speciality Registrar in Restorative Dentistry, School of Dentistry, The University of Manchester, Higher Cambridge Street, Manchester M13 9PL, United Kingdom. Electronic address: reza@manchester.ac.uk. 3. Professor in Restorative Dentistry, School of Dentistry, The University of Manchester, Higher Cambridge Street, Manchester M13 9PL, United Kingdom.
Abstract
PURPOSE: This study investigated the impact of incorporating Chlorhexidine and Fluconazole as bioactive compounds on the fracture toughness of conventional heat cured denture base acrylic resin material (PMMA). MATERIALS AND METHODS: 30 single edge-notched (SEN) samples were prepared and divided into three groups. 10% (mass) Chlorhexidine and 10% (mass) Diflucan powder (4.5% mass Fluconazole) were added to heat cured PMMA respectively to create the two study groups. A third group of conventional heat cured PMMA was prepared as the control group. Fracture toughness (3-point bending test) was carried out for each sample and critical force (Fc) and critical stress intensity factor (KIC) values measured. Data were subject to parametric statistical analysis using one-way ANOVA and Post hoc Bonferroni test (p=0.05). RESULTS: Fluconazole had no significant effect on the fracture toughness of the PMMA while Chlorhexidine significantly reduced the KIC and therefore affected the fracture toughness. CONCLUSION: When considering addition of a bioactive material to PMMA acrylic, Chlorhexidine will result in reduced fracture toughness of the acrylic base while Fluconazole has no effect.
PURPOSE: This study investigated the impact of incorporating Chlorhexidine and Fluconazole as bioactive compounds on the fracture toughness of conventional heat cured denture base acrylic resin material (PMMA). MATERIALS AND METHODS: 30 single edge-notched (SEN) samples were prepared and divided into three groups. 10% (mass) Chlorhexidine and 10% (mass) Diflucan powder (4.5% mass Fluconazole) were added to heat cured PMMA respectively to create the two study groups. A third group of conventional heat cured PMMA was prepared as the control group. Fracture toughness (3-point bending test) was carried out for each sample and critical force (Fc) and critical stress intensity factor (KIC) values measured. Data were subject to parametric statistical analysis using one-way ANOVA and Post hoc Bonferroni test (p=0.05). RESULTS:Fluconazole had no significant effect on the fracture toughness of the PMMA while Chlorhexidine significantly reduced the KIC and therefore affected the fracture toughness. CONCLUSION: When considering addition of a bioactive material to PMMA acrylic, Chlorhexidine will result in reduced fracture toughness of the acrylic base while Fluconazole has no effect.
Authors: Hang-Nga Mai; Do-Yeon Kim; Dong Choon Hyun; Ju Hayng Park; Sang Min Lee; Du-Hyeong Lee Journal: J Clin Med Date: 2019-11-01 Impact factor: 4.241