On the basis of available evidence , MTA presented good marginal adaptation to dentine walls .
This systematic review analysed the literature comparing marginal adaptation of mineral trioxide aggregate ( MTA ) with other filling material s in root-end cavities .
Assessment of marginal adaptation after apicoectomy and apical sealing with Nd:YAG laser.
OBJECTIVE Recurrent periapical disease poses a substantial challenge to the dental practitioner . However , the use of novel methods and material s in periapical surgery has increased the success rates of treatment . The objective of this study was to assess the effects of mineral trioxide aggregate ( MTA ) retrofilling and apical sealing with Nd : YAG laser ( at 10 Hz , 150 mJ , 1.5 W , in 60 sec pulses ) as adjuncts to apicoectomy . METHODS Perpendicular root end resection was performed with diamond-coated burs on 40 canine teeth previously subjected to endodontic treatment . Teeth were r and omly allocated into four groups : group A , apicoectomy alone ; group B , apicoectomy+Nd : YAG laser ; group C , apicoectomy+MTA retrofilling ; group D , apicoectomy+MTA retrofilling+Nd : YAG laser . Specimens were embedded in epoxy resin and sliced lengthwise and crosswise . RESULTS Scanning electron microscopy ( SEM ) analysis showed more homogeneous and canaliculi-free apical surfaces in groups B and D ( p<0.01 ) . Marginal gaps between the dentin surface and filling material were observed in decreasing order of gap size in groups B , A , D , and C ( p<0.01 ) for cross-sectional analysis . Energy-dispersive X-ray spectrometry ( EDS ) revealed greater phosphorus ( p<0.01 ) and lower calcium ( p<0.01 ) ion content in the Nd : YAG-irradiated groups . CONCLUSIONS In this study , Nd : YAG laser irradiation had a positive effect on dentin surface sealing , despite an untoward dimensional effect when associated with MTA retrofilling
On the basis of available evidence , MTA presented good marginal adaptation to dentine walls .
This systematic review analysed the literature comparing marginal adaptation of mineral trioxide aggregate ( MTA ) with other filling material s in root-end cavities .