Dental tool combining reamer and router

Dentistry – Apparatus – Tool bit

Patent

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Details

433102, A61C 302

Patent

active

049900889

ABSTRACT:
There is provided a combination dental tool for boring and grinding undercut bore holes in teeth. The tool includes a boring end portion tapering longitudinally endwardly to a minimum effective diameter at the tip and providing an axially facing cutting surface for drilling a bore into a tooth upon rotation of the tool. A shank portion extending axially from the drilling end portion includes at least two successive longitudinally extending sections, the first section having laterally facing cutting surfaces and a relatively larger effective diameter, and the second section, immediately adjacent the first section, having a relatively smaller diameter. Using this tool, an axially directed force forms the bore hole, and a laterally directed force exerted on the tool within a previously drilled bore hole, routs out an undercut portion in the internal surface of the bore.

REFERENCES:
patent: 1200921 (1916-10-01), Chester
patent: 2453696 (1948-11-01), Brooks
patent: 3894339 (1975-07-01), Manzi
patent: 4019254 (1977-04-01), Malmin
patent: 4270903 (1981-06-01), Nash
patent: 4389192 (1983-06-01), Neuwirth
patent: 4457710 (1984-07-01), McSpadden
patent: 4661061 (1987-04-01), Martin
patent: 4758156 (1988-07-01), Johnson

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