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
Catalogue details

Licence: In copyright

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.

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    LOCAL ANESTHESIA. l>eforo sitarting any surgical interference in the mouth, the field of operation should be thoroughh^ cleansed and painted with tinc- ture of iodin. After the diagnosis is made the metliod of injec- tion best suited for the case on hand is then decided. The necessary quantity and the concentration of the anesthetic so- lution is now prepared, and the syringe and hypodermic needle fitted ready for the work. To facilitate the ready penetration of the needle into the tissues, its point may be dipped into car- bolated vaselin. The correct position of the syringe in the hands of the operator and its proper manipulation is an important factor, and has to be acquired by practice. The hand holding the syringe is exclusively governed in its movement by the wrist, so as to allow delicate and steady movements, and the fingers must be trained to a highl}'^ developed sense of touch. The syringe is filled by drawing the solution up into it; it is held per- pendicularly, point up, and the piston is pushed until the first drop appears at the needle ]3oint, which precaution prevents the injection of air into the tissues. Before entering into a discussion of the various methods of the technique of the injection, it is essential to recall to one’s mind the anatomic structure of the alveolar process, as this fac- tor plays an important part in the distribution of the injection within the bone. Anatomic Structure of the Alveolar Process. Regarding the anatomic structure of the alveolar process of both jaws, it should be remembered that this bone is transitory in structure, becoming thinner with age, and is very readily ab- sorbed when the teeth are removed. The process is composed of soft, spongy cancelloid bone, which is penetrated by Haver- sian and Volkmann’s canals (the latter carrying the vessels of Von Ebner), and also contains lymph vessels. The anterior wall of the alveolar process of the maxilla is a thin plate throughout, except about the border of the molar teeth, while the posterior surface is reinforced by the intermaxillary bone and palatal processes. In the mandible tlie anterior portion is fhc thinnest