MEDICINSKI GLASNIK

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230 Medicinski Glasnik, Volumen 6, Number 2, August 2009 specimens was recorded and the flexural strength was calculated according to the formula: F max – measured force of the loader (N); l – distance between posts (here 15 mm); b – width of the specimen (here 10 mm); h – height of the specimen (here 3 mm). Obtained numerical results were analyzed with SPSS statistical package (SPSS Inc., Chicago, USA). Statistical analysis was performed using descriptive statistics, tests of between-subjects effects, Scheffe’s test, and Student’s t-test. In order to reveal the quality of bonding between glass fibers and denture base polymer, glass fiber reinforced specimens were randomly chosen and sealed in Durofix material (Struers, Rodovre, Denmark). Subsequently they were ground, and polished according to the routine procedure (36) to obtain a smooth surface suitable for microscopic examination. It was performed with the use of a light microscope Olympus BH2-UMA (Olympus Optical, Tokyo, Japan) and the characteristic images were photographed with Olympus C-5050 Ultra Zoom camera (Olympus Optical, Tokyo, Japan). RESULTS During testing specimens made of Meliodent Heat Cure and auto polymerizing Meliodent Rapid polymer (control groups) demonstrated the lowest flexural strength, whereas, the specimens reinforced with both types of fibers showed higher flexural strength values (Figure 2, Table 1). Scheffe’s test applied across ten investigated groups of specimens revealed a statistically significant difference (P
or “industrial”-Kelteks) had no statistically significant influence. That was also confirmed by Student’s t-test (t=1.367). Auto polymerizing polymer material was weaker than heat-cure polymerizing dental base material (P
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MEDICINSKI GLASNIK Official publica
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Medicinski Glasnik Official Publica
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MEDICINSKI GLASNIK

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