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Figure 17. Descending 3 mm inferiorly to Figure 16, into the crown area of the incisor teeth, there is no signal from the root canal of the upper left central incisor that can be compared with the normal signal from the pulp chambers of adjacent teeth. This is owing to the root filling and restoration, which has obliterated the pulp chamber. There is a slight haziness to the margins of this crown which may be due to the metallic nature of the restoration interfering as an artefact.
