. The Dental cosmos. Prosopometer. instruments as a prosopometer, modelsof the mouth, and lastly Dr. Griinbergssymmetroscope.* A correct diagnosiscan only be obtained by a careful com-parison of the conclusions drawn from * See Dental Cosmos. April 1912, p. 400. 826 THE DENTAL COSMOS. the employment of each of the foregoingmethods and instruments. Photographs. Profile and full-facephotographs are in my opinion foremostin aiding the diagnosis of the relationof the jaws to each other, or of eitheror of both jaws to the rest of the every case that I have seen, it hasbeen possible to trace
. The Dental cosmos. Prosopometer. instruments as a prosopometer, modelsof the mouth, and lastly Dr. Griinbergssymmetroscope.* A correct diagnosiscan only be obtained by a careful com-parison of the conclusions drawn from * See Dental Cosmos. April 1912, p. 400. 826 THE DENTAL COSMOS. the employment of each of the foregoingmethods and instruments. Photographs. Profile and full-facephotographs are in my opinion foremostin aiding the diagnosis of the relationof the jaws to each other, or of eitheror of both jaws to the rest of the every case that I have seen, it hasbeen possible to trace the marring of thefacial outline to a definite malocclusionby this means. In a great many casesit would be impossible, from a merestudy of the occlusion only, to determinethe effect on the face. Prosopometers. An instrument knownas a prosopometer (Fig. 1) has been Fig. used to a considerable extent for deter-mining the distance of any part of theface or teeth from the external auditorymeatus. Its accuracy is very doubtful,owing to the flexibility of the meatusand the looseness of the joints of theinstrument. It is chiefly useful for veri-fying other methods, and measuring theamount of growth forward during anytreatment. Plaster models. The method next inimportance to photography is the studyof models of the mouth. For this pur-pose the models should be divided intotwo classes, the first to include thosecases where there is little or no irregu-larity of the teeth— when the teethform a regular arch but there is a mal-relation of the opposing teeth and jaws, and the second to include those caseswhere there is great irregularity of theteeth, with or without malrelation of thejaws. Examples of the latter class are Fig. 3.
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Keywords: ., bookcentury1900, bookdecade1910, bookiddent, booksubjectdentistry
