Abstract Background Bacterial microleakage is an important cause of apical periodontitis and endodontic treatment failure. This study aimed to assess the bacterial nano-mineral trioxide aggregate (nano-MTA) as a sealer, Endoseal MTA, GuttaFlow Bioseal sealers in atmospheric pressure, simulated underwater diving aviation conditions. Methods In this vitro, experimental study, 180 extracted single...

This study aimed to compare the effects of ethylenediaminetetraacetic acid (EDTA) and maleic acid (MA) on the sealing ability of various root canal sealers. Eighty root canals were instrumented and irrigated with either EDTA or MA. They were divided into eight experimental groups and obturated as follows: Group 1: MA + Hybrid Root SEAL/gutta-percha. Group 2: EDTA + Hybrid Root SEAL/gutta-percha...

AIM The aim of this study was to evaluate the microleakage at gingival margins below the cementoenamel junction (CEJ) of Class II composite restorations using various placement techniques. METHODS AND MATERIALS Sound human maxillary premolars were selected. Eighty slot-style cavities on the mesial or distal surfaces were prepared with the cervical margins located apical to the CEJ. The specim...

OBJECTIVES To measure microleakage around class V composite restorations after piezoelectric ultrasonic scaling and sonic toothbrushing. METHODS 3 mm × 2 mm × 1.5 mm boxes were prepared on buccal and lingual surfaces of extracted molars centered on the cementum-enamel junction. Half the preparations were beveled (0.5 mm). Preparations were restored with composite and polished. Restorations on...

in order to deermine the effect of root canal cealer on microleakage of obturated root canal by lateral condensation technique(LCT) with and without tug-back(TB).seventy exteracted single root canal teeth were examined.after preparation of root canal with step-back technique,teeth were divided to six groups as follows:5 teeth as positive control group that obturated by LCT with gutta-perch itho...

introduction: the purpose of this in vitro study was to compare apical microleakage after obturation with nickel-titanium (niti) compared to stainless steel (ss) finger spreaders. materials and methods: eighty straight single-rooted human teeth were instrumented using step-back technique. the specimens were randomly divided into four groups. the two experimental groups (n=30) and the negative c...

Endodontically treated teeth are known to present a higher risk of biomechanical failure than vital teeth. Complete obturation of the root canal system to the cementodentinal junction is assumed to be an important goal in endodontic treatment. The microleakage is determined today by many in vivo and in vitro techniques such as; staining, measurement by scanning electron microscope, bacterial ac...

introduction: the purpose of this laboratory study was to evaluate the effect of acidic ph on the sealing ability of calcium-enriched mixture (cem) cement and mineral trioxide aggregate (mta) apical plugs. methods and materials: seventy single-rooted human maxillary anterior teeth were recruited. the teeth were randomly divided into 4 experimental groups ( n =15), and 1 negative and 1 positive ...