. Oral anaesthesia; local anaesthesia in the oral cavity, technique and practical application in the different branches of dentistry. the malar bone. Keeping in closecontact with the infra-temporal surface of the maxillary bone,the needle is advanced carefully, obliquely upwards, for fourcentimeters. (This injection requires a special needle of largersize and five and one-half centimeters in length, mounted mostadvantageously on the bayonet-shaped piece in the long hub.)Inject a small amount as you go along till you reach the spheno-maxillary fossa, where the main injection is made. The dosess
. Oral anaesthesia; local anaesthesia in the oral cavity, technique and practical application in the different branches of dentistry. the malar bone. Keeping in closecontact with the infra-temporal surface of the maxillary bone,the needle is advanced carefully, obliquely upwards, for fourcentimeters. (This injection requires a special needle of largersize and five and one-half centimeters in length, mounted mostadvantageously on the bayonet-shaped piece in the long hub.)Inject a small amount as you go along till you reach the spheno-maxillary fossa, where the main injection is made. The dosesshould not be too small, 4 of a two per cent solution willgive complete anaesthesia in fifteen minutes. (See Table IV.) LOCAL ANAESTHESIA 91 D. GANGLION ANAESTHESIA Haertel* describes in bis article souie of the largest surgicaloperations of the face as resections of the uiaxilla, large tumoroperations, and also cases of neuralgia, where he used ganglionanaesthesia of the Vth nerve with great success, either withNovocain or in neuralgia with alcohol. The anaesthesia wasmostly produced on botli sides by a doul)le Fig. 58. Schematic drawing sliowing the injection into the Gasserian Ganglion. INJECTION INTO THE GASSERIAN GANGLION Insert the needle in the cheek (after preparing the placein the usual manner) opposite the gingival margin of the secondmaxillary molar, after anaesthetizing the tissue superficially,push the needle upward between tlie upper jaw and ramus ofthe mandible till it reaches the base of the skull striking theplanum infratemixirale. Wliile inserting tlie needle we placethe index finger of the left hand into the superior part of thevestibulum oris to prevent the needle from piercing tlie nnuousmembrane of the moutli. After having readied the base of theskull, the direction of the needle is adjusted by the followingrules: If we look at it from front, we find that it points in the * Haei-tel; Frlrt.^fIlritte auf rtem Gebifte di-r Local Aiiaesthesic.
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