Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1997-10-17
2000-08-22
Wilson, John J.
Dentistry
Apparatus
Having intra-oral dispensing means
A61C 302
Patent
active
06106288&
ABSTRACT:
A system for treating teeth and associated tooth structure using a pressurized air propellant mixed with abrasive material includes a manifold which defines air passages leading from the pressurized air source to dispensing chambers which hold the abrasive material. The manifold further provides a convenient structure for mounting a number of the system components. The manifold simplifies assembly of the system and improves the integrity of air passages within the system. The air abrasion system also has a mixing block and continuous purge feature which eliminate crosstalk and backflow problems when switching between abrasive materials. Evacuation apparatus incorporating a cyclone separator is integrally provided with the system which requires minimal regular maintenance and maximizes suction flow through the apparatus. A boost feature of the system is provided to selectively increase the ratio of abrasive material to air in an air-abrasive material mixture, thereby increasing the rate of tooth reduction, without requiring additional air pressure.
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Annett David Howard Meldrum
Barry Stephen D.
Brassil John Michael
Burroughs Andrew C.
Chang Shu Kun
Bieber James B.
Dentsply Research & Development Corp.
Hura Douglas J.
Wilson John J.
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