Nonsurgical repair of perforation defects. Internal matrix concept.

The internal matrix concept of perforation repair offers distinct advantages over classic techniques. The biocompatible matrix allows control of the repair material. The technique sensitivity involved with placement of the repair material is reduced and contamination of the restorative material with hemorrhage is prevented. In accessible locations perforations can be repaired predictably and, by comparison, the prognosis is improved greatly. Fewer surgeries or surgical alterations of teeth will be necessary, thus reducing the cost of treatment. A higher percentage of existing crowns can be salvaged if surgical alteration of the tooth is prevented. Microsurgical techniques currently are being developed and researched that may allow nonsurgical repair of inaccessible perforations. The scope of endodontic therapy, therefore, will be expanded.