Photo-curable reparative material for dental use

Details Photo-curable reparative material for dental use Photo-curable reparative material for dental use

2005-02-01

2005-02-01

Yoon, Tae H. (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C523S113000, C523S115000, C523S212000, C523S220000

Reexamination Certificate

active

06849670

ABSTRACT:
A photocurable dental restorative comprising (i) 100 parts by weight of a polymerizable monomer, (ii) 0.01 to 5 parts by weight of a photopolymerization initiator of acylphosphine oxide, and (iii) 200 to 1900 parts by weight of an inorganic filler, wherein the inorganic filler (iii) is a mixed filler of:(A) irregular-shaped inorganic particles having an average particle size of not smaller than 0.1 μm but smaller than 1 μm;(B) spherical inorganic particles having an average primary particle size of not smaller than 0.1 μm but not larger than 5 μm; and(C) fine inorganic particles having an average primary particle size of not larger than 0.1 μm;which are so blended as to satisfy the following mass ratios {circle around (1)} to {circle around (3)}:{circle around (1)} mA/(mB+mC)=0.2 to 3{circle around (2)} mB/(mB+mC)=0.5 to 0.99{circle around (3)} mC/(mB+mC)=0.01 to 0.5where mA, mB and mC are masses of the inorganic particles (A) to (C).The restorative features excellent handling property, and makes it possible to obtain a cured product having a high fracture toughness and excellently glossy surface.

REFERENCES:
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patent: 5856374 (1999-01-01), Ono et al.
patent: 6034152 (2000-03-01), Burger et al.
patent: 2000-53519 (2000-02-01), None

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