Title: Method for preparation of dental crowns and bridges

Abstract: A method for dentists in the preparation of a patient's tooth for a jacket crown, or for bridgework. It involves the use of a block for firm attachment to the cusp of the tooth, said block having prepared side and end surfaces for guiding a dental handpiece in two parameters.

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Inventors: Marshall, Kenneth H. (Castlecrag, AU)

Application Number: 744464
Filing Date: 1976-11-24
Publication_date: 1979-03-20
Assignee: Premach Pty. Limited (Sydney, AU)
Primary Class(es): 433/223
Other Classes:
US Patent Ref:

383367	May, 1888	Patrick	32/49.
472004	Mar, 1892	Sweet et al.	32/49.
1157681	Oct, 1915	Dalbey	32/49.
3445935	May, 1969	Marshall	32/40.
3600810	Aug, 1971	Marshall	32/49.

Other Refs:
Primary Examiner: Kinsey, Russell R.
Assistant Examiner: Wilson, John J.
Attorney: Finnegan, Henderson, Farabow & Garrett