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28. Root canal sealing using single-cone method.

The single-cone technique consists of matching a cone to the prepared canal. For this technique a type of canal preparation is advocated so that the size of the cone and the shape of the preparation are closely matched. When a gutta-percha cone fits the apical portion of the canal snugly, it is cemented in place with a root canal sealer.

Technique: It is necessary to select a gutta-percha pin of the proper size. At first, one injects sealer in the root canal with help of rotary paste-filler. Then root canal gutta-percha pin is entered, earlier dipped in sealer, and is pushed to the top of the root canal by using tweezers. An excess of filling material is removed from the tooth cavity. An excess of gutta-percha pin is cut by heated instrument.

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