Dentistry – Apparatus – Having intra-oral dispensing means
Reexamination Certificate
2005-08-30
2005-08-30
O'Connor, Cary E. (Department: 3732)
Dentistry
Apparatus
Having intra-oral dispensing means
Reexamination Certificate
active
06935860
ABSTRACT:
The invention relates to apparatuses for treating surfaces of teeth by using a mixture of pressurised gas, preferably pressurised air, and abrasive particles such as particles of aluminium oxide. A first apparatus comprises a chamber having at least a primary inlet and preferably an additional inlet and also having an outlet. The primary inlet establishes a vortex within the chamber and the additional inlet fluidises the abrasive particles lying in the bottom of the chamber. A second apparatus comprises a handpiece with a nozzle having an outlet provided with notches or holes. The notches or holes constitute additional discharge openings apart from an orifice in the nozzle. Both of the apparatuses ensure that the pressure needed for the treatment and the amount of abrasive particles for the treatment is minimised as much as possible.
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International Search Report dated Jan. 2, 2002 form International Application No. PCT/DK01/00619.
Nixon & Peabody LLP
Safran David S.
Sandman ApS
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