. Dental and oral radiography : a textbook for students and practitioners of dentistry . Fig. 105.—An unerupted lower third molar which is crowding the Fig. 106.—An erupting lower third molar which has been responsible for the crowding of the lower incisors and cuspids. 182 DENTAL AND ORAL EADIOGRAPJI Y AYhere it is necessary to either move nonvital teeth, orutilize them as anchorage, it is essential to the patientswelfare and comfort to know that such teeth and theirinvesting tissues are in a healthy condition. By determin-ing this prior to instituting orthodontic treatment, muchtr
. Dental and oral radiography : a textbook for students and practitioners of dentistry . Fig. 105.—An unerupted lower third molar which is crowding the Fig. 106.—An erupting lower third molar which has been responsible for the crowding of the lower incisors and cuspids. 182 DENTAL AND ORAL EADIOGRAPJI Y AYhere it is necessary to either move nonvital teeth, orutilize them as anchorage, it is essential to the patientswelfare and comfort to know that such teeth and theirinvesting tissues are in a healthy condition. By determin-ing this prior to instituting orthodontic treatment, muchtrouble, both to the patient and operator, can often beavoided. (See Fig. 107.) 10. In cases ivhere anomalous teeth are present, to dif-ferentiate between anomalous and normal teeth. In a majority of instances, this can be done without theaid of the radiogram, unless the teeth in question havefailed to erupt. Under such conditions, by utilizing ac-curacy in the technic of making the radiograms, little dif-ficulty is encountered in determining the difference be-tween normal and anomalous teeth. Examples are shownin Figs. 108, 109 and 110. Radiographic Requi
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