Dental materia medica and therapeutics : with special reference to the rational application of remedial measures to dental diseases a textbook for students and practitioners / by Hermann Prinz.

Prinz, Hermann, 1868-1957

Date:: 1913

Credit: Dental materia medica and therapeutics : with special reference to the rational application of remedial measures to dental diseases a textbook for students and practitioners / by Hermann Prinz. Source: Wellcome Collection.

499/600

$ill tliG loot cQnnl for r diiy or two, or until tlio luucli dainaged tissues about the apex of the tootli liavo ro£>-aiued (lioir normal equilibrium. itliin recent years a number of complicated syringes, variously known as high pressure S3^ringes and obtunders, have been advo- cated for the purpose of forcing anesthetic solutions through tooth substance by intense pressure. As we have stated, this conception of pressure anesthesia is erroneous. Close contact of the anes- thetizing fluid with the dentinal fibers, plus the necessary time for conveying the absorbed anesthetic to the nerve endings, explains the phenomenon veri^ plausibh\ A strong metal syringe, provided Figure 99. Weaver High Pressure Obtunding Syringe. with a specially prepared needle to make a water-tight joint as near as possible, is all that is required. Those who prefer a special liigh pressure syringe for such purposes ma}'’ purchase an}’' one of tlie many devices that will best suit their fancy. The Weaver ob- tunder or the Jewett-Willcox syringe are much lauded for such ] imposes. Any of the various methods for anesthetizing a tooth for the jmrpose of its extraction, as outlined under “The Technique of the Injection,” may be u.sed for anesthetizing the pulp. Under certain conditions such procedures may be preferred to tbe various methods of pressure anesthesia.$