Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1988-09-15
1990-08-21
Ivy, C. Warren
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524269, 524306, 524310, 5245755, 433224, C08L 700, C08K 510, A61K 608
Patent
active
049506978
ABSTRACT:
A nonshrinkable, thermoplastic and injectable endodontic filling composition. The composition is a mixture of transpolyisoprene, either naturally produced as balata or gutta percha, or synthesized from isoprene, and a liquid castor ester platicizer. Alternatively, the mixture comprises transpolyisoprene, a liquid castor ester platicizer and castor oil or dimethyl silicon fluid lubricant. The mixture is preferably a combination of the transpolyisoprene, the liquid castor ester plasticizer and the liquid castor oil or dimethyl silicon fluid lubricant or both. The composition is compounded to form a highly thermoplastic material which is injectable at a clinically acceptable temperature with a manually operated injection system without shrinkage of the composition after placement in a dental root canal.
REFERENCES:
patent: 2066117 (1934-10-01), Mayfield
patent: 2148833 (1938-02-01), Raynolds
patent: 3031423 (1962-04-01), Meier
patent: 3418264 (1968-12-01), Deuter
patent: 4449938 (1984-05-01), Pollak
patent: 4483679 (1984-11-01), Fujisawa et al.
patent: 4632977 (1986-12-01), Riazi
patent: 4740245 (1988-04-01), Futami
Yee, "Three-dimensional obturation of the root canal using injection-molded thermoplasticized dental gutta-percha," Journal of Endodontics, vol. 3 No. 5, May 1977, pp. 168-174.
Chang Tiang-Shing
Weddle Marchese Lisa N.
Block Drug Co. Inc.
Ivy C. Warren
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