Under the conditions of these in vitro leakage studies , it is concluded that smear layer removal improves the fluid-tight seal of the root canal system whereas other factors such as the obturation technique or the sealer , did not produce significant effects
The purpose of this systematic review was to determine whether smear layer removal reduces leakage of obturated human teeth in vitro .
Scanning electron microscopic study of the apical dentine surfaces lased with ND:YAG laser following apicectomy and retrofill.
The purpose of this investigation was to study the effects of a Nd : YAG laser on the cut surface of teeth using scanning electron microscopy ( SEM ) . Eighteen single-rooted teeth were cleaned , shaped , and obturated with gutta-percha and root canal sealer . The apical 3 mm of each tooth were resected with a diamond fissure bur , and the teeth were r and omly divided into two groups of nine teeth each . The resected surface of each root in one group was lased twice . The duration of lasing and the number of pulses were recorded for each tooth . The teeth were air dried , mounted on stubs , sputter-coated with gold-palladium and examined under SEM . Application of the Nd : YAG laser caused melting of apical dentine surfaces . The melted material resembled the appearance of glazed interconnected droplets . Resolidification and recrystalization of the melted areas appeared to be incomplete and discontinuous . Some areas between the glazed regions appeared similar to those of non-lased apical dentine resected root surfaces
Under the conditions of these in vitro leakage studies , it is concluded that smear layer removal improves the fluid-tight seal of the root canal system whereas other factors such as the obturation technique or the sealer , did not produce significant effects
The purpose of this systematic review was to determine whether smear layer removal reduces leakage of obturated human teeth in vitro .