Portal de Periódicos da CAPES

Apical extrusion of thermoplasticized gutta-percha used as a root canal filling

1988; Elsevier BV; Volume: 14; Issue: 3 Linguagem: Inglês

10.1016/s0099-2399(88)80213-9

1878-3554

G.M. Ritchie, Dale M. Anderson, Joseph S. Sakumura,

Dental Radiography and Imaging

The purpose of this study was to investigate extrusion of thermoplasticized gutta-percha through the foramina of standardized root canals using a pistol-type delivery system. Two other techniques, chloroform-dip vertical condensation of gutta-percha and silver cones, were also used in combination with the thermoplasticized gutta-percha. In the alternate techniques the apical 3 mm of the root canal was obturated and the remaining canal filled with molten gutta-percha. Gutta-percha extrusion through uniform openings and leakage around the apical fill was measured. With a 0.20-mm apical opening there was little apical extrusion with any technique, but with the 0.40-mm foramina, the gutta-percha techniques had significant amounts of gutta-percha extrusion. The technique using silver cones as plugs demonstrated no apical extrusion and the least dye leakage. Results of this investigation indicate that a solid plug with a melting point greater than the temperature of the injected material is necessary to prevent extrusion through apical foramina 0.40 mm in diameter. The purpose of this study was to investigate extrusion of thermoplasticized gutta-percha through the foramina of standardized root canals using a pistol-type delivery system. Two other techniques, chloroform-dip vertical condensation of gutta-percha and silver cones, were also used in combination with the thermoplasticized gutta-percha. In the alternate techniques the apical 3 mm of the root canal was obturated and the remaining canal filled with molten gutta-percha. Gutta-percha extrusion through uniform openings and leakage around the apical fill was measured. With a 0.20-mm apical opening there was little apical extrusion with any technique, but with the 0.40-mm foramina, the gutta-percha techniques had significant amounts of gutta-percha extrusion. The technique using silver cones as plugs demonstrated no apical extrusion and the least dye leakage. Results of this investigation indicate that a solid plug with a melting point greater than the temperature of the injected material is necessary to prevent extrusion through apical foramina 0.40 mm in diameter.