1. It does not reproduce canal fins and irregularities. 2. The surface of the material is frequently rough and pitted with inadequate dispersion of the sealer. 3. The voids that are produced may remain empty or filled with sealer which may resorb in time, thus decreasing the effectiveness of the obturation. Chemically plasticized GP – many solvents like chloroform, eucalyptol and halothane are used to dissolve GP and obturate the canal. The main drawback of this method is that once the solvent evaporates the GP may shrink and a space may be created. To overcome these disadvantages the thermo plasticized gutta percha techniques have been introduced.
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