Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . [mpacted upper canines. ODONTALGIA 31 available surface of the hard palate, from the nasal cavity and fromthe maxillary sinus. In one case the vagrant made its appearanceat the age of sixty-five in an edentulous jaw over which a plate hadbeen worn for more than thirty years. Impacted teeth frequentlyshow marked absorption lacunae; genuine caries, however, hasprobably never been observed. Root remnants left in the jaws and fractured teeth have beenvery frequently obstinate sources of m
Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . [mpacted upper canines. ODONTALGIA 31 available surface of the hard palate, from the nasal cavity and fromthe maxillary sinus. In one case the vagrant made its appearanceat the age of sixty-five in an edentulous jaw over which a plate hadbeen worn for more than thirty years. Impacted teeth frequentlyshow marked absorption lacunae; genuine caries, however, hasprobably never been observed. Root remnants left in the jaws and fractured teeth have beenvery frequently obstinate sources of most obscure pain. Usually,an existing fistula will assist in locating these broken roots; on rareoccasions the fistula may be absent. A roentgenogram will clarifythe diagnosis in both instances. Treatment: Removal of the ob-struction or of the impacted tooth or root Fractured upper incisors. Overstrain of Single Teeth.—Single teeth standing in a brokenarch frequently are overstrained during the process of the antagonists of the tooth are missing the tooth may elongatein its socket and thereby expose its root or roots or it may causetraumatic injury of the opposing alveolar ridge. The continuousimpact on these teeth during mastication may cause inflammationof the pericementum with all its sequences, while its exposed roots,being denuded of the protective alveolar process and cementum,becomes frequently most excruciatingly hypersensitive. Treat-ment: Prosthetic replacement of the lost teeth or extraction. (Thetreatment of hypersensitive dentin is discussed on p. 87, et ah) Setting Teeth on Edge.—This popular expression as employedby the laity denotes a state of irritation of the pulp brought aboutby the action of organic acids taken as condiments or being presentin foodstuffs upon denuded dentin surfaces. Upon sound enamel,ordina
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