. Oral anaesthesia; local anaesthesia in the oral cavity, technique and practical application in the different branches of dentistry. ZYGOMATIC INJECTION Palpitate the zygomatic process of the maxilla, preparingthe place of insertion as above and sliding the long needle,keeping close to the bone, upward, backward and inward,depositing the solution while injecting. In this manner thetwo posterior superior branches and often also the middlesuperior branch are crossed by the direction of the needle, andanaestlielized ])y the solution, desensitizing the molars and, infavorable cases, also the bicu
. Oral anaesthesia; local anaesthesia in the oral cavity, technique and practical application in the different branches of dentistry. ZYGOMATIC INJECTION Palpitate the zygomatic process of the maxilla, preparingthe place of insertion as above and sliding the long needle,keeping close to the bone, upward, backward and inward,depositing the solution while injecting. In this manner thetwo posterior superior branches and often also the middlesuperior branch are crossed by the direction of the needle, andanaestlielized ])y the solution, desensitizing the molars and, infavorable cases, also the bicuspids. It is often advisable to 86 ORAL ANAESTHESIA inject in two directions to reach all the superior alviolarbranches. The horizontal direction will reach the posteriorsuperior alviolar branches, while the more vertical directionwill reach the middle superior alviolar nerve, in the case thisis given off before the maxillary nerve enters the infra-orbitalcanal. The zygomatic injection gives also anaesthesia of thebuccal part of the gum. Inject 2 Anaesthesia occurs inten minutes and lasts one hour. (See Tables III and IV.). Fig. 54. Infra-temporal surface of the maxilla. The posterior superior alviolarbranches are shown entering the foramina. One branch is a gingival branch. 2. INFRA-ORBITAL INJECTION Palpitate the infra-orbital foramen and place upon it thetip of the thumb or index finger. With one of the other fingersretract the upper lip and after preparing the place, insert thelong needle in the canine fossa, as high as the reflection of themucous membrane allows. Push it along the bone until feltunder the finger. While compressing the soft tissue over the
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