جستجوی مقالات مرتبط با کلیدواژه "white mta" در نشریات گروه "پزشکی"

Mineral trioxide aggregate (MTA) can cause coronal discoloration after the regenerative endodontic therapies. Prevention of the MTA-induced discoloration in the esthetic zone is of great importance for patients and clinicians. The present study aimed to evaluate the effectiveness of different types of dentin bonding agents (DBA) in preventing crown discoloration caused by white MTA (WMTA). A total of 36 extracted maxillary incisors were selected. After performing the endodontic procedures, the teeth were divided into 3 groups. In groups 1 and 2, before applying the WMTA in access cavity, Adper Single Bond (SB) and Clearfil SE Bond (CSE) were used for 5th and 6th, respectively. While the access cavity was impregnated with WMTA in group 3. In these three groups access cavities were sealed. The color of the samples was examined by a spectrophotometer. The ∆E was calculated after 2 months storage in incubator and physiologic serum. The collected data were analyzed with the help of the Kolmogorov-Smirnov, independent t-test, and Tukey's range test. A p-value less than 0.05 was considered statistically significant. There was no significant difference between WMTA+SB and WMTA+CSE (P=0.546). However, the ∆E of the WMTA group between WMTA+SB and WMTA+CSE was significant (P<0.001). The DBAs can prevent MTA-induces discoloration. Although differences between 5th and 6th generations of DBAs were not statistically significant, the samples prepared with 6th generation of adhesives showed lower crown discoloration.

White MTA، and Portland cement have similar chemical structures. The aim of this study was to evaluate the inflammatory reaction of rabbit bone tissues to implanted white MTA، and Portland cement. Subjects and In this in vivo study، twenty 1-year old male Iranian rabbits (experiment white Specie)، were divided into 5 groups (4 in each group). After preparation of 3 holes (distance 2 cm- depth and diameter 2 mm) in tibia، the allocated groups received an intra-bony implant of the test materials (White MTA، or Portland cement) and the third hole، with no implant، was created to evaluate inflammatory reaction related to surgical trauma. Samples were processed for histological study after 7، 15، 30، 60، and 90 days. Furthermore، blood samples were taken for evaluation of systemic inflammation for ESR test. The results were analyzed using Kruskal-Wallis and Mann–Whitney tests. At similar time points، statistical analysis revealed significant difference between implanted material (white MTA، Portland cement) in the first and second holes with control hole due to bone tissue reaction but pair-wise evaluation Between all of implanted material found no significant differences. In different times bone tissue reaction showed significant differences. The finding of this study demonstrated a similar tissue compatibility between both implantable materials and improvement of tissue healing occur with similar time profile after material implanting.