Gurbuz-Oflezer Ozlema, Bahadır Hakanb, Ünver Senemc, Oflezer Ceyhand
aMinistry of Health, Bahcelievler Oral and Dental Health Hospital, Department of Prosthodontics, Istanbul, Turkey
bIstanbul, Turkey
cGazi University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey
dBakirkoy Training and Research Hospital for Psychiatry, Neurology and Neurosurgery, Department of Anesthesiology, Istanbul, Turkey
Summary
Background/Aim: Relining is defined as the procedure used to resurface the tissue side of a denture with new base material, thus producing an accurate adaptation is provided at the denture foundation area. During mastication, relined dentures have to withstand masticatory forces to prevent fracture. The aim of this study was to evaluate the flexural strength of acrylic resin denture base relined with different methods and materials. Material and Methods: Fourteen experimental groups and one control group were determined to consider different reline materials and processing methods. Acrylic resin specimens were prepared with the dimensions of 65x 10x 1.5 mm and reline materials (1.5 mm thickness) were placed on acrylic resins. Reline material was not used in control group specimens. Flexural strength values of relined and control specimens were measured with three-point bending test at a speed of 5 mm/min. Data were analyzed with using one way Anova and Student t tests. Results: The highest flexural strength values were shown in control group (86.51±1.08 MPa). There were significant differences among relined specimens (p< 0.05). For the relined specimens, the highest flexural strength values were found in the relined specimens with denture base material (77.90±1.93 MPa), and the lowest values were found in relined with autopolymerize acrylic material (59.81±1.50 MPa). Conclusions: Relining of the heat cure denture base material significantly decreases the flexural strength for all processing methods and materials.
Keywords: denture base; flexural strength; relining
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Balkan Journal of Dental Medicine, 2021, vol. 25, br. 2, str. 108-113