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Ultrasonic root‐end preparation Part 2, Microleakage of EBA root‐end fillings

1994; Wiley; Volume: 27; Issue: 6 Linguagem: Inglês

10.1111/j.1365-2591.1994.tb00277.x

1365-2591

W. P. SAUNDERS, E. M. SAUNDERS, James L. Gutmann,

Dental Implant Techniques and Outcomes

Summary The effect of three methods of root‐end preparation, following apical resection, on the apical seal of root‐end fillings, was studied in vitro . Root canals of 116 single‐rooted teeth with mature apices were prepared chemo‐mechanically and obturated with gutta‐percha and sealer. The root ends were resected with a diamond bur under water coolant and were prepared as follows: group I a size 010 round bur was used to prepare an apical cavity 2–3 mm down the long axis of the root; group II treatment as per group 1 followed by a 60‐s rinse with a solution of 10:3 (10% citric acid: 3% Fe 2 Cl 3 ); and group HI an ultrasonic retrotip was used to prepare a 2–3 mm deep apical cavity. The root end was restored with an EBA cement. Apical leakage was determined using India ink after 7 days and 7 months. The teeth were demineralized, rendered transparent and linear dye penetration was recorded. Results showed that there was no significant difference in leakage between the groups at each time interval ( P >0.05) but there was increased leakage after 7 months ( P <0.01). Cracking of the root surface was seen most often with the ultrasonically prepared roots ( P <0.001).