TY  - JOUR
TI  - Effects of boron on the mechanical properties of polymethylmethacrylate denture base material
AB  - PurposeThe objective of this study was to determine whether the addition of different typesof boron (Borax, Boric Acid and Colemanite) to polymethyl methacrylate denturebase resin would improve flexural and impact strengths, and surface hardness ofpolymethyl methacrylate.Materials and MethodsBorax, Boric acid, Colemanite were added to heat polymerized polymethylmethacrylate specimens were prepared for flexural strength (65x10x2.5 mm),impact strength (50x6x4 mm), and hardness (20x6x4 mm) tests according to themanufacturers’ instructions (n=10). To determine flexural strength of the specimens,they were loaded until failure on a universal testing machine using a three pointbending test. Specimens were subjected to the Charpy impact test machine.Hardness of the specimens was measured with an analog shoremeter Shore D. Thedata were analyzed with Kruskal-Wallis and Mann-Whitney U tests (α=0.05).ResultsThe highest mean flexural strength value was seen in 3% Borax group and followedby 1% Colemanite group. In addition, the highest mean impact strength value wasrecorded in 1% Colemanite group, and differences between 1% Colemanite groupand control group were found to be statistically significant (p=0,001). Furthermore,there was significant difference in hardness between control group and all othergroups (p<0.001).ConclusionThe addition of 1% Colemanite to polymethyl methacrylate improved themechanical properties of PMMA.
AU  - Tugut, Faik
AU  - DEMIR, HAKAN
AU  - DOĞAN, Derya ÖZDEMİR
AU  - Akin, Hakan
AU  - Ozdemir, Ali Kemal
DO  - 10.26650/eor.20210132
PY  - 2021
JO  - European oral research (Online)
VL  - 55
IS  - 1
SN  - 2630-6158
SP  - 45
EP  - 53
DB  - TRDizin
UR  - http://search/yayin/detay/426597
ER  -