Microleakage measurement of different retrofilling materials using a new in vitro method
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A quantitative, non destructive in vitro investigation was conducted to study the relative sealing ability of amalgam and SuperEBA when used as retrofillings. Human anterior teeth were cleaned and shaped following the B.U. technique; the teeth were then obturated with vertical compaction of warm gutta-percha without the aid of sealer. The teeth were tested a first time for leakage, and then subjected to apicoectomies by removal of 2 mm from the tip of the root. The specimens were again tested for leakage. 2 mm-deep retrocavities were prepared and the two materials condensed in the cavities; the teeth were then tested again for leakage. The results showed no statistical significant difference between the two materials, although the amalgam group showed a tendency to seal better than the SuperEBA group. The leakage of some specimens did not improve with the placement of the retrofilling, demonstrating that the key for successful surgical endodontics lies in the quality of the previous nonsurgical treatment and in the complete removal by means of apicoectomy of the unobturated portion of the root canal system.
Thesis (MSD)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1993 (Endodontics).Includes bibliography: leaves 98-109.
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