Oral anaesthesia; local anaesthesia in the oral cavity : technique and practical application in the different branches of dentistry / by Kurt Hermann Thoma.

  • Kurt Hermann Thoma
Date:
[1914], [©1914]
Catalogue details

Licence: Public Domain Mark

Credit: Oral anaesthesia; local anaesthesia in the oral cavity : technique and practical application in the different branches of dentistry / by Kurt Hermann Thoma. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

    51/156 (page 45)
    Already iu ten miiuites a Novocaiu-Suprareniu sohitiou will show discoloration (from high tem- perature, action of light or air), diminishing its power and increasing its toxity. VI. A sterile Novocain-Suprareniu solution cannot be made lasting through addition of anti- septics, because the yellow discoloration of the Novocain, and the red discoloration of the supra- renin are due to chemical processes (oxydation) and not bacterial influences. Therefore a Novocain-Suprarenin solution shovild be sterile, but an antiseptic character is not re- quired. VII. Antiseptic additions [e. g., Thj'mol, and others, as in patented preparations (author)] are not only unnecessary but directly injurious. At the present time there is no antiseptic known which is entirely non-irritant in a concentration powerful enough to have sufficient antiseptic properties. VIII. Individualizing the concentration of Novocain is not required for the small doses used for dental purposes and, contrary to cocaine, it makes no difference whether a certain dose is in- jected in Aveak or strong concentration, as long as the total doses of 0.2 grams is not transgressed. IX. In dentistry where the part to be anaes- thetized (bone and tooth) cannot be infiltrated directly, but where in contrary a diffusion is re- quired, a solution of a comparatively high percent- age can )je used only. X. The best solution for dental purposes is the two per cent solution.