Effect of fiber direction on the polymerization shrinkage of fiber-reinforced composites / 대한치과보존학회지
Journal of Korean Academy of Conservative Dentistry
;
: 364-370, 2009.
Article
in Korean
| WPRIM
| ID: wpr-125391
ABSTRACT
The aim of this study was to evaluate the effect of fiber direction on the polymerization shrinkage of fiber-reinforced composite. The disc-shaped flowable composite specimens (d = 10 mm, h = 2 mm, Aeliteflo A2, Bisco, Inc., IL, USA) with or without glass fiber bundle (X-80821P Glass Fiber, Bisco, Inc., IL, USA) inside were prepared, and the longitudinal and transversal polymerization shrinkage of the specimens on radial plane were measured with strain gages (Linear S-series 350omega, CAS, Seoul, Korea). In order to measure the free polymerization shrinkage of the flowable composite itself, the disc-shaped specimens (d = 7 mm, h = 1 mm) without fiber were prepared, and the axial shrinkage was measured with an LVDT (linear variable differential transformer) displacement sensor. The cross-section of the polymerized specimens was observed with a scanning electron microscope to examine the arrangement of the fiber bundle in composite. The mean polymerization shrinkage value of each specimen group was analyzed with ANOVA and Scheffe post-hoc test (alpha=0.05). The radial polymerization shrinkage of fiber-reinforced composite was decreased in the longitudinal direction of fiber, but increased in the transversal direction of fiber (p<0.05). We can conclude that the polymerization shrinkage of fiber-reinforced composite splint or restoratives is dependent on the direction of fiber.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Polymers
/
Splints
/
Sprains and Strains
/
Bisphenol A-Glycidyl Methacrylate
/
Barium Compounds
/
Silicon Dioxide
/
Composite Resins
/
Displacement, Psychological
/
Electrons
/
Polymerization
Language:
Korean
Journal:
Journal of Korean Academy of Conservative Dentistry
Year:
2009
Type:
Article
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