Title: Dental impression compound

Abstract: A dental impression composition is formulated from a hydrogenated wood rosin, petrolatum, aluminum powder and talc and includes the following characteristics: (1) good plastic flow at mouth temperature to provide adequate working time with low flow at room temperature; (2) good heat and light stability which affords good shelf life with no change in flow properties; (3) flow properties not changed during extensive heating and sterilization during preparation for application on the dental tray; (4) sufficient, but not excessive adhesion strength so that the composition adheres to the tray but not to the patient's wet tissues; and (5) low thermal-expansion coefficient so that there are no dimensional changes as the impression is cooled from mouth temperature and (6) good definition of detail.

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Inventors: Johnson, Paul A. (Mequon, WI, US)
Pinkalla, Hamilton A. (Milwaukee, WI, US)

Application Number: 675047
Filing Date: 1976-04-08
Publication_date: 1977-07-05
Assignee:
Primary Class(es): 106/35 106/241
Other Classes:
US Patent Ref:

2077418	Apr, 1937	Kelly	106/241.
2248999	Jul, 1941	Johnson	106/35.

Other Refs:
Primary Examiner: Morris, Theodore
Assistant Examiner:
Attorney: Fuller; Henry C.