. Oral anaesthesia; local anaesthesia in the oral cavity, technique and practical application in the different branches of dentistry. Fig. 35. Radiograph showing the infiltration method for an upper cuspid. ■^^^mmt [• ^ m . ► 1 M t Fig. 36. Radiograph showing the infiltration method for an upper bicuspid 68 ORAL ANAESTHESIA usually takes easy effect. Generally the short needle is it, opening directed toward the bone, down to the perios-teum. A drop or two is injected. Now the syringe is bestheld like a writing pen, and after the first injection has takeneffect, push it slowly and car
. Oral anaesthesia; local anaesthesia in the oral cavity, technique and practical application in the different branches of dentistry. Fig. 35. Radiograph showing the infiltration method for an upper cuspid. ■^^^mmt [• ^ m . ► 1 M t Fig. 36. Radiograph showing the infiltration method for an upper bicuspid 68 ORAL ANAESTHESIA usually takes easy effect. Generally the short needle is it, opening directed toward the bone, down to the perios-teum. A drop or two is injected. Now the syringe is bestheld like a writing pen, and after the first injection has takeneffect, push it slowly and carefullj^ upwards, if necessary, in-jecting as you go along, till you are opposite the apex of theroot. Here inject slowly and evenly, moving the syringeslightly forth and back, to avoid injecting into a small this manner a depot of 1 to If is deposited, into the sub-mucous tissue between mucous membrane and bone. liittle. Fig. 2)7. Wrong positionof needle. Fig. 38. Right position of needle opening pointing towards the bone. force is needed to inject. After five to eight minutes, anaes-thesia occurs in the tooth injected for, sufiQcient to extirpatethe pulp without pain. (See Table I.) 2. Injection on the palatal side of the maxillary teeth. The palatal gum of the maxilla is supplied by the anteriorpalatine and naso-palatine nerves, therefore for surgical opera-tions an additional injection to produce anaesthesia of the softparts is required. Also for the molars, and often for the firstbicuspid, a palatal injection is needed to anaesthetize thepalatal root. For these injections we start at the gingivalmargin, push the needle doAvn parallel with the process,and in-ject again into the part which takes up the solution theeasiest, the submucous tissue. After five to eight minutes an-aesthesia occurs. (See Table II.) LOCAL ANAESTHESLi 69 We have studied the lower jaw and foundThe Infiltration it p
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