Dm. Dalat et Lsw. Spangberg, COMPARISON OF APICAL LEAKAGE IN ROOT CANALS OBTURATED WITH VARIOUS GUTTA-PERCHA TECHNIQUES USING A DYE VACUUM TRACING METHOD, Journal of endodontics, 20(7), 1994, pp. 315-319
In this study, residual apical microlumina remaining after obturation
with five different gutta-percha obturation methods were traced with a
n efficient vacuum method. Seventy-nine human maxillary anterior teeth
were instrumented and divided into five groups. The groups were obtur
ated with single-cone techniques, lateral condensation, vertical conde
nsation, Thermafil, and Ultrafil techniques. All specimens were immers
ed in a vacuum flask containing 2% methylene blue dye solution. The ai
r was evacuated with a vacuum pump to an absolute pressure of 75 torr
for 30 min. The roots were sectioned longitudinally and the linear ext
ent of dye penetration was measured. Group mean linear dye penetration
values were: single-cone technique, 1.55 +/- 0.95 mm; lateral condens
ation, 2.25 +/- 1.46 mm; vertical condensation, 2.61 +/- 2.61 mm; Ther
mafil 1.41 +/-1.16 mm; and Ultrafil 3.51 +/- 4.70 mm. There were no st
atistically significant differences between the gutta-percha obturatio
n methods. The clinical implications of these findings are discussed.