. The teeth in health and disease . reasoncocaine is objected to. It is injected into thegum in a manner similar to cocaine, and in afew moments renders the gum quite insensible,permitting the painless removal of the authors have used eucaine in a largenumber of cases with very satisfactory is slightly slower and less reliable in itsaction than cocaine, to which it is preferredby many authorities, and like cocaine is exten-sively used in dental and ophthalmic surgery. Ether Spray and Ethyl Chloride. Ether spray was originally introduced by SirB. W. Richardson, and has been


. The teeth in health and disease . reasoncocaine is objected to. It is injected into thegum in a manner similar to cocaine, and in afew moments renders the gum quite insensible,permitting the painless removal of the authors have used eucaine in a largenumber of cases with very satisfactory is slightly slower and less reliable in itsaction than cocaine, to which it is preferredby many authorities, and like cocaine is exten-sively used in dental and ophthalmic surgery. Ether Spray and Ethyl Chloride. Ether spray was originally introduced by SirB. W. Richardson, and has been used for manyvears as an obtundent in the extraction of theteeth. Pure sulphuric ether is thrown on thegum, at the sides of the tooth or teeth to be ETHER SPRAY 113 extracted, by a spraying apparatus worked by asmall foot bellows. The intense cold producedrapidly freezes the gum and minimizes the painof the operation. The greatest drawback toits employment in dentistry is the fact that thefirst shock caused by the cold spray being. Fig. 56.—Ether Spra}^ Apparatus. thrown in the sensitive tooth is often nearlyas painful as the actual extraction. Etherspray is now superseded by chloride of ethyl,which has precisely the same action as etherspray and is more effective and less unpleasantto the patient. For large and firm teeth it isof little use, but where a number of loose teeth H H4 THE TEETH have to be extracted it proves a very usefullocal anesthetic. It is generally supplied insmall glass bulbs having a minute opening atthe top through which, when held in the warmhand the ethyl chloride is projected in a smallstream which is directed on the gum in theneighbourhood of the tooth to be gum becomes blanched and anesthetized,and the poignancy of the pain of extractionconsiderably reduced. Difficulties and Complications in theExtraction of Teeth. Like other surgical operations the extractionof teeth is at times attended with certaindifficulties and complications and


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