Dentistry – Apparatus – Having heater or electrode
Patent
1977-09-09
1981-05-05
Bartis, Anthony
Dentistry
Apparatus
Having heater or electrode
128214A, 128236, 128255, 219230, 219239, 219240, 222146HE, 433 81, A61C 504, A61M 518, H05B 300
Patent
active
042656184
ABSTRACT:
An electrically heated endodontic syringe for injecting thermoplastic material, such as gutta percha, into a root canal cavity includes a syringe barrel for holding a supply of thermoplastic material, a heater body threadedly attached at one end to the syringe barrel and an injection needle threadedly secured to the other end of the heater body by means of a hub. A manual plunger is provided in the syringe barrel for ejecting thermoplastic material from the barrel through the heater body, hub and needle into the root canal cavity. The barrel and plunger are made of materials having a low coefficient thermal conductivity of less than about 20 Btu/(hr)(ft.sup.2) (F..degree./ft) and a thermally insulating washer is positioned between the barrel and the heater body to minimize heat transfer to the barrel. The heater body, hub and needle are made of materials having a high coefficient of thermal conductivity of at least about 200 Btu/(hr) (ft.sup.2) (.degree.F./ft) to maximize heat flow to the needle. An electric resistance heating element carried by the heater body provides sufficient heat to maintain the entire needle above 230.degree. F. at which the thermoplastic material will flow but below the temperature at which the material thermally decomposes. The needle is at least one inch long, of 18-30 gauge size, and manually malleable to enable the needle to be bent to conform to the root canal cavity.
REFERENCES:
patent: 944254 (1909-12-01), Binford
patent: 1140660 (1915-05-01), Brizius
patent: 1189735 (1916-07-01), Quintin
patent: 1619817 (1927-03-01), Gibson
patent: 1754330 (1930-04-01), Litomy
patent: 2102591 (1937-12-01), Hagemeier
patent: 2505028 (1950-04-01), Boeger
patent: 2567960 (1951-09-01), Myers et al.
patent: 2905799 (1959-09-01), De Rugeris
patent: 3154811 (1964-11-01), Gardener
patent: 3199740 (1965-08-01), Juffa et al.
patent: 3466752 (1969-09-01), Braun
patent: 3522654 (1970-08-01), Schoelz
patent: 3745655 (1973-07-01), Malmin
patent: 3864045 (1975-02-01), Hudson
patent: 4121587 (1978-10-01), Kronman et al.
patent: 4122850 (1978-10-01), Bucalo
"Three-Dimensional Obturation of the Root Canal Using Injection-Molded Thermoplasticized Dental Gutta-Percha", by F. S. Yee, et al., Journal of Endodontics, vol. 3, No. 5, May 1977, pp. 168-174.
"The Endodontic Pressure Syringe", by H. Berk, et al., Chicago Dental Society Review, vol. 68, No. 9, Sep. 1975, pp. 21-23.
Herskovitz Sheldon B.
Marlin Jay
Stiglitz Martin R.
Bartis Anthony
Solar Energy Technology, Inc.
LandOfFree
Electrically heated endodontic syringe for injecting thermoplast does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrically heated endodontic syringe for injecting thermoplast, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrically heated endodontic syringe for injecting thermoplast will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-294571