Consultant

Objectives: To assess the effect of mineral trioxide aggregate(MTA) as root-end filling material in teeth with symptoms and evidence of periapical pathosis. Methods: Ten failure cases may be inadequate debridment or oburation or cornal leakage had draining sinus tract and periapical inflammatory lesion, the radiography showed apical area had 3-4mm tissue damage. Under the operetive microscopy, with local anaeasthesia, exposure the root end area with incision and turn over the catarrh, wipe off the inflammation tissue, secation root– end 3mm, the root-end cavity perepare with ultrasonics, rinse the cavity with sodium hypochlorite to the disinfect the area, mix the MTA powder with enough sterler water and then filled with MTA about 3mm of root-end. Checked the correct position of MTA mixture, an x-ray control was down. Clinic and radiographica follow-up ranged between 6 months and 1 year. The resolusion of the periapical lesions was observed Results: The clinic followed at 6 months and 1 year revealed an adequate clinic function and absence of clinic symptoms and the sinus tract. The radiogradiophics followed–up at 6 months and 1 year, the periapical radiolucentry had disappeared. The root-ends filled MTA had a complete layer of cementum over the filling. Conclusion: Both clinic and radiography followed-up at 6 months and 1 year showed healing of the apical periodontitis and new hard tissue formation in the apical area of affection teeth. MTA appeared to be a valid option for root-end filling material. The final set may not be adversely affected by blood contamination also has an advantage, but further research needs to be done about how the MTA behaves after long–time exposure to the tissue fluid.