. Elementary and dental radiography . Fig. 139. Fig. 140. Fig. 139. Retained temporary, lower, second molar, with the succedaneous tooth beneath it. Ageof patient, twenty-two. The dark spots in the temporary tooth and two permanent molars aremetal fillings. All of the mesial root and some of the distal root of the temporary tooth resorbed. Fig. 140. The same as Fig. 139 one month after extraction of the temporary tooth. Observehow rapidly the bicuspid is erupting. When this picture was made it could be seen in the

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