The transition to the use of gutta percha as the preferred endodontic filling material and the increased use of condensation methods (lateral and vertical) have resulted in definitive changes in the design of the endodon tic canal preparation. Gutta-percha is biologically acceptable and more per manent, but it is difficult to manipu late. This paper introduces a clinical method-anticurvature filing- for the preparation of the curved or narrow canal to receive gu tta-percha filling materials.
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