[Effect of dowel space preparation on the integrity of the apical seal].
Fifty-six single-rooted maxiller teeth obturated with amalgam, N2 and AH26 were tested in vitro to determine if dowel space preparation had an effect on apical seal. Dye penetration was evaluated using 210 UV Spectrophotometer and it was observed that the use of AH26 with or without gutta-percha to seal the root was the most suitable technique on apical seal and dowel space preparation did not influence the sealing ability of it.
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