Comparative SEM study of the marginal adaptation of white and grey MTA and Portland cement.
The use of a suitable substance that prevents egress of potential contaminants into the periapical tissues is important in endodontic surgery. The aim of the present study was to compare the marginal adaptation of three root-end filling materials (white mineral trioxide aggregate (MTA), grey MTA and Portland cement), using scanning electron microscopy. Seventy-five single-rooted extracted human teeth were used. The canals were instrumented and filled with gutta-percha. Following root-end resection and cavity preparation, root-end cavities were filled with white MTA, grey MTA or Portland cement. Using a diamond saw, roots were longitudinally sectioned into two halves. Under scanning electron microscopy, the gaps between the material and dentinal wall were measured. The data were analysed using Kruskal-Wallis test. The mean of the gap in grey MTA, white MTA and Portland cement was 211.6, 349 and 326.3 microm, respectively. The results indicate that the gap between grey MTA and the dentinal wall is less than other materials, but there was no significant difference between the materials tested in this study (P > 0.05).
Bidar
Maryam
M
Department of Endodontics, Mashad Dental School, Mashad, Iran.
Moradi
Saeed
S
Jafarzadeh
Hamid
H
Bidad
Salma
S
D017607:Aluminum Compounds; D001047:Apicoectomy; D017610:Calcium Compounds; D003738:Dental Cements; D018772:Dental Marginal Adaptation; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010087:Oxides; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D017640:Silicates; D018709:Statistics, Nonparametric
D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C472247:accelerated Portland cement; C086631:mineral trioxide aggregate