Results 231 to 240 of about 23,437 (250)

Thermomechanical analysis of dental gutta-percha

Journal of Endodontics, 1992
Samples of three common commercial gutta-percha endodontic filling points (Hygienic, Mynol, and Maillefer Pink) and a sample of natural gutta-percha were submitted to thermomechanical analysis under pressures ranging from 0.01 to 0.2 N. Samples of Mynol and Maillefer filling points were thermally treated and then submitted to thermomechanical analysis ...
Emmanuel Charpentier, Luiz Carlos M. Carrera, Pierre Michailesco, Marc J.M. Abadie, Joseph Marciano   +4 more
openaire   +3 more sources

GUTTA-PERCHA TISSUE IN SURGERY

Journal of the American Medical Association, 1910
Having observed that the men in general practice with whom I come in contact are for the most part unfamiliar with the use of gutta-percha tissue in surgery, I felt that it might be worth while to call attention to this agent. This unfamiliarity is explained by the fact that practically nothing is said about gutta-percha tissue in textbooks of surgery,
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Modifications of the Gutta-Percha Hydrocarbon

Rubber Chemistry and Technology, 1932
Abstract The spongy product from gutta-percha hydrocarbon, which is obtained from a concentrated petroleum ether solution, consists of microcrystals of the α-modification. The difference in its solubility and that of the compressed product prepared from the spongy product is perhaps attributable to the presence of an impurity.
J. R. Katz, A. W. K. de Jong
openaire   +2 more sources

Comparison of tissue response between a synthetic gutta-percha and a natural gutta-percha endodontic filler

Oral Surgery, Oral Medicine, Oral Pathology, 1975
Biologic acceptance is one of several criteria that must be met by an endodontic filling material. The purpose fo this experiment was to compare a new filling material consisting of a synthetic gutta-percha with a standard material consisting of natural gutta-percha. Each sample, being an endodontic point, contained a quantity of fillers. The materials
Frank Casanova, Ronald J. Nicholson, John S. Greenspan, Marvin M. Stark   +3 more
openaire   +3 more sources

Cytotoxic effects of gutta-percha solvents

Journal of Endodontics, 1994
Cytotoxicity of commonly used gutta-percha solvents was evaluated. Gutta-percha dissolved by chloroform, halothane, or turpentine was evaluated with the radiochromium release method using L929 mouse fibroblast cells. All solvents were toxic. Turpentine was most toxic followed by halothane and chloroform, which caused similar levels of cell injury.
Larz S.W. Spångberg, Sergio V. Barbosa, David H. Burkard   +2 more
openaire   +3 more sources

An In Vitro Assessment of Iodoform Gutta-Percha

Journal of Endodontics, 2005
The purpose of this study was to test the ability of a commercially available iodoform gutta-percha, to delay infiltration of Enterococcus faecalis using a microleakage model. Seventy extracted single-rooted teeth were decoronated and biomechanically prepared using hand and rotary instruments.
Andre Mickel, S. Kirk Huffaker, Benjamin Neibaur, Sami Chogle   +3 more
openaire   +3 more sources

Dimensional stability of thermosensitive gutta-percha

Journal of Endodontics, 1997
The expansion and shrinkage of four commercial brands of endodontic thermosensitive gutta-percha were evaluated. A modified volume dilatometry technique was used; the dilatometric system (DS) consisted of Pyrex glass capillary tubes and a specimen chamber. Each sample was weighed to 10(-4) mg, placed in the specimen chamber, and subjected to vacuum for
Charles Lee, Youngjune Chang, S.J. Robinson, Eckhard M. Hellmuth, Charles M. Cobb   +4 more
openaire   +2 more sources

Gutta-percha solvents—a comparative study

Journal of Endodontics, 1986
Gutta-percha solvents are used for both root canal filling and removal of root canal filling materials. A method is presented in which four gutta-percha solvents (chloroform, xylene, Endosolv-E, and orange terpenes) were compared for their effect on three brands of gutta-percha.
M. Rosenberg, U. Unger, Z. Metzger, A. Tamse   +3 more
openaire   +3 more sources

The Constituents of Gutta-Percha

Scientific American, 1905
O. Muller, A. Tschirch
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Residual gutta-percha filling

Oral Surgery, Oral Medicine, Oral Pathology, 1977
openaire   +3 more sources