Endodontic. Case Study Number 525214
Locating both root canal entries without lateraly perforating the root and without destroying to much sound tooth structure in order to keep tooth restorable, then, cleaning and shaping those root canals without loosing patency, without breaking an endodontic file and without perforating the root represent the two major endodontic procedure problems to overcome when treating calcified canals with an S form.
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