IADR Abstract Archives

BEHAVIOR OF THE DENTINARY WALL AGAINST PASSIVE ULTRASONIC AND SONIC IRRIGATION. PRELIMINARY REPORT OF DOCTORAL THESIS.

OBJECTIVES: Evaluate with SEM removal of smear layer and erosion. Instrumentation: Universal Protaper System. Irrigation: acid solutions and active systems. METHODS: 60 premolars were used from dental bank of CEFOUBA. Irrigation: Groups 1 and 2: 5,25% NaOCl. Groups 3 and 4: 5,25% NaOCl + 17% EDTA. Groups 5 and 6: 5,25% NaOCl + 5% Maleic acid. Groups 7 and 8: 5,25% NaOCl + 10% Citric acid. Groups 9 and 10: 5,25% NaOCl + 37% Phosphoric acid. Sonic Activation: Groups 1, 3, 5, 7, 9 and Passive Ultrasonic Activation: Groups 2, 4, 6, 8, 10. 180 MEB 5000X microphotographs were made: 2, 6 and 10 mm from the apex. Removal smear layer and erosion were compared between irrigation-irrigating techniques and between thirds of the canal. Reported number of observations, median, mean, standard deviation, absolute frequency and % of score values. Kruskal-Wallis test was used, with comparisons of post-hoc pairs. RESULTS: There was significant difference in removal between techniques (Kruskal-Wallis test: p <0.05). There was significant difference between groups 1 and 2 (controls) presented lower degree of removal and the rest of groups. There was significant difference between groups 3 or 10 and 6 or 8, the latter had less removal. There was significant difference between groups 8, less removal, and 9 or 10. There was significant difference in erosion between irrigation-irrigating techniques (Kruskal-Wallis test: p <0.05). There was significant difference between groups 1 or 2, less erosion, and groups 3, 4, 7, 8 and 9. There was significant difference between groups 3, 4 or 7 that presented greater erosion and groups 5, 6 or 10, and between groups 7 or 9 and 10 the latter had less erosion. CONCLUSIONS: Techniques SO / 5,25% NaOCl + 17% EDTA and IUP / 5,25% NaOCl + 37% Phosphoric acid produce greater smear layer removal. Irrigation SO / 5,25% NaOCl +17% EDTA produces erosion significantly greater than IUP / 5,25% NaOCl + 37% Phosphoric acid. Techniques SO / 5,25% NaOCl + 5% Maleic acid, IUP / 5,25% NaOCl + 5% Maleic acid and IUP / 5,25% NaOCl + 37% Phosphoric acid produce less erosion. IUP / 5,25% NaOCl + 37% Phosphoric acid provides better balance between removal and erosion. There was no significant difference in removal or erosion between thirds of the canal.
Argentine Division Meeting
2018 Argentine Division Meeting (Córdoba, Argentina)
Córdoba
2018

Accepted Abstracts
  • Labarta, Alicia Beatriz  ( University of Buenos Aires. College of Dentistry. Endodontics Department.. )
  • Sierra, Liliana Gloria  ( University of Buenos Aires. College of Dentistry. Endodontics Department )

  • Oral and Poster Presentations