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 .
Evaluation of different methods for the root-end cavity preparation.
OBJECTIVE The dentinal walls of root-end cavities were examined for the presence of cracks and debris in correlation with the area of the root surfaces that remained after the resection . STUDY DESIGN One hundred extracted single-rooted teeth were endodontically treated , mounted in acrylic resin blocks , and the apical 2 mm of the root-apex was resected . According to the resected root surface area the teeth were divided into 2 groups having large ( > 2 mm(2 ) ) or small ( < 2 mm(2 ) ) surface area . For retro grade cavity preparation 4 devices were used : slow-speed h and piece , diamond coated stainless steel ultrasonic tip , smooth stainless steel ultrasonic tips , and sonic diamond-coated tips . Teeth were examined under a videomicroscope for the presence of fractures , dentin chips , and gutta-percha remnants on cavity walls . Preparation time was also recorded . RESULTS Preparation with smooth stainless steel ultrasonic tips produced few intradentin cracks . Dentin debris was more frequently seen in rotary preparations whereas gutta-percha remnants were seen mainly at ultrasonically prepared teeth . CONCLUSIONS Sonic and ultrasonic devices produced cleaner , well-centered , and more conservative root-end cavities than the rotary instrumentation . Cracks do not correlate directly with the surface area of the root-end surfaces but rather with the type of retrotip used to prepare the root-end cavity
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 .