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Reducing of on polymerization shrinkage by application of UV curable dental restorative composites

100%

Świderska J. , Czech Z. , Świderski W. , Kowalczyk A.

Polish Journal of Chemical Technology

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2014

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tom Vol. 16, nr 3

51--55

EN

This manuscript describes dental compositions contain in-organic fillers, multifunctional methacrylates and photoinitiators. The main problem by application and UV curing process is the shrinkage of photoreactive dental materials during and after UV curing process. Total shrinkage of UV curable dental composites is a phenomenon of polymerization shrinkage, typical behavior for multifunctional methacrylates during polymerization process. The important factors by curing of dental composites are: kind and concentration of used methacrylates, their functionality, double bond concentration, kind and concentration of added photoinitiator and UV dose. They are investigated UV-curable dental compositions based on 2,2-bis-[4-(2-hydroxy-3-methacryxloyloxypropyl)phenyl]propane (Bis-GMA) and containing such multifunctional monomers as 1,3-butanediol dimethacrylate (1,3-BDDMA), diethylene glycol dimethacrylate (DEGDMA), tetraethylene glycol dimethacrylate (T3EGDMA), trimethylolpropane trimethacrylate (TMPTMA), polyethylene glycol 200 dimethacrylate (PEG200DA). Reduction of polymerization shrinkage of dental compositions is at the moment a major problem by dental technology.

2

Reducing of on Polymerization Shrinkage by Application of UV Curable Dental Restorative Composites

100%

Świderska J. , Czech Z. , Świderski W. , Kowalczyk A.

Polish Journal of Chemical Technology

|

2014

|

tom 16

|

nr 3

51-55

EN

This manuscript describes dental compositions contain in-organic fillers, multifunctional methacrylates and photoinitiators. The main problem by application and UV curing process is the shrinkage of photoreactive dental materials during and after UV curing process. Total shrinkage of UV curable dental composites is a phenomenon of polymerization shrinkage, typical behavior for multifunctional methacrylates during polymerization process. The important factors by curing of dental composites are: kind and concentration of used methacrylates, their functionality, double bond concentration, kind and concentration of added photoinitiator and UV dose. They are investigated UV-curable dental compositions based on 2,2-bis-[4-(2-hydroxy-3-methacryxloyloxypropyl)phenyl]propane (Bis-GMA) and containing such multifunctional monomers as 1,3-butanediol dimethacrylate (1,3-BDDMA), diethylene glycol dimethacrylate (DEGDMA), tetraethylene glycol dimethacrylate (T3EGDMA), trimethylolpropane trimethacrylate (TMPTMA), polyethylene glycol 200 dimethacrylate (PEG200DA). Reduction of polymerization shrinkage of dental compositions is at the moment a major problem by dental technology.

3

Polymerization shrinkage by investigation of uv curable dental restorative composites containing multifunctional methacrylates

100%

Świderska J. , Czech Z. , Kowalczyk A.

Polish Journal of Chemical Technology

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2013

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tom 15

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nr 2

81-85

EN

Typical commercial restorative dental compositions in the form of medical resins contain in-organic fillers, multifunctional methacrylates and photoinitiators. The currently used resins for direct composite restoratives have been mainly based on acrylic chemistry to this day. The main problem with the application and radiation curing process is the shrinkage of photoreactive dental materials during and after UV curing. Shrinkage of restorative radiation curable dental composites is a phenomenon of polymerization shrinkage, typical behavior of multifunctional methacrylates during the polymerization process. The important factors in curing of dental composites are: the kind and concentration of the used methacrylate, its functionality, double bond concentration, the kind and concentration of the added photoinitiator and UV dose emitted by the UV-lamp. They are investigated multifunctional 1,3-butanediol dimethacrylate (1,3-BDDMA), diethylene glycol dimethacrylate (DEGDMA), triethylene glycol dimethacrylate (TEGDMA), trimethylolpropane trimethacrylate (TMPTMA), 2,2-bis-[4-(2-hydroxy-3-methacryxloyloxypropyl) phenyl]propane (Bis-GMA), ethoxylated Bis-GMA (EBPDMA) and dodecandiol dimethacrylate (DDDMA). Reduction of polymerization shrinkage of restorative dental compositions is at the moment a major problem of dental technology. This problem can be solved through an application of photoreactive non-tacky multifunctional methacrylates in the investigated dental adhesive fillings.

4

Wpływ odległości źródła napromieniania na właściwości fotoutwardzalnych wypełnień stomatologicznych

75%

Świderska J. , Świderski W. , Antosik A.

Polimery

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2019

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tom T. 64, Nr 7-8

509--513

PL

Zbadano wpływ odległości źródła światła lampy LED od powierzchni próbki oraz czasu naświetlania na właściwości mechaniczne utwardzonych komercyjnych kompozytów stomatologicznych. Określono ich właściwości mechaniczne, takie jak: wytrzymałość na ściskanie, moduł Younga oraz odkształcenie przy ściskaniu. Każdorazowo po badaniach wytrzymałościowych okiem nieuzbrojonym oceniano wygląd uszkodzeń próbki kompozytu. Stwierdzono, że zwiększenie odległości źródła światła lampy LED od powierzchni kompozytu wydłuża czas jego utwardzania, co prowadzi do pogorszenia wytrzymałości na ściskanie, a w konsekwencji do zmniejszenia trwałości wypełnienia.

EN

Effects of radiation source (LED lamp) distance from the sample surface and exposure time on the mechanical properties of the cured commercial dental composites were examined. The basic properties of the hardened composites were determined, such as compressive strength, Young’s modulus, and compression strain. After each strength test, the appearance of composite damages was assessed by naked eye. By increasing the distance of the source of radiation from the composite surface, the curing time of the composite was extended, resulting in a deterioration of compressive strength and, consequently, reducing the durability of dental filling.