Biomedical subjects
Publications and source records attributed to P E Lovdahl.
Traumatically induced coronal fractures frequently extend below the free gingival margin. Diagnostic criteria are presented to differentiate those for which crown lengthening alone is appropriate from those that also require orthodontic extrusion. A simplified crown-lengthening technique is described for the exposure of a fracture margin.
Endodontic failure is a difficult diagnosis to confirm. Various other pathologic entities that must be ruled out by radiographs and tests have been discussed. Because of significant and, as yet, unresolved problems with surgical endodontic treatment, conservative retreatment should be given priority in treatment planning. Specialized techniques that can be used successfully to remove endodontic posts, gutta-percha silver cones, Thermafil, and paste filling materials from root canals have been discussed as well.
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Explore the source record for details and available documents.