Ultrasonic retrieval of separated instruments was proven to be a highly successful procedure. However, its effects on root dentin are of major concern. Aim: To assess the influence of separated instruments alloy type on dentinal cracks development following ultrasonic retrieval in the presence of different intracanal lubricants. Methods: M-wire ProTaper Next files with tip size #25 and taper 0.6 (n=20), and EDM Neoniti files having the same size and taper (n=20) were fractured at 4mm from their tips in forty double-rooted moderately-curved upper premolars. A modified ultrasonic tip was used for their retrieval in presence of 17% EDTA solution or olive oil. Successfully retrieved samples had their roots horizontally sectioned, at 4mm and 6mm from the apex. Sections was examined under the SEM with different magnifications (60-300x) for cracks detection. Results: The majority of samples showed the development of dentinal cracks, with an incidence of 70% and 90% in ProTaper Next and Neoniti groups respectively in presence of EDTA, as opposed to 70% in Protaper Next and 80% in Neoniti in presence of olive oil, and with no statistically significant difference between the different alloys or intracanal. Conclusion: Separated instruments of different metallurgy show no effect on the incidence of dentinal cracks following ultrasonic retrieval. Lubricants of different viscosities fail to omit the development of cracks.
Hakim, O., Sabet, N., & Elasfouri, H. (2024). The Influence of Separated Instruments Metallurgy on the Incidence of Dentinal Cracks following Retrieval (In Vitro Study). Advanced Dental Journal, 6(2), 281-288. doi: 10.21608/adjc.2023.193838.1265
MLA
Omnia Abdel Hakim; Nihal Ezzat Sabet; Heba Ahmed Elasfouri. "The Influence of Separated Instruments Metallurgy on the Incidence of Dentinal Cracks following Retrieval (In Vitro Study)". Advanced Dental Journal, 6, 2, 2024, 281-288. doi: 10.21608/adjc.2023.193838.1265
HARVARD
Hakim, O., Sabet, N., Elasfouri, H. (2024). 'The Influence of Separated Instruments Metallurgy on the Incidence of Dentinal Cracks following Retrieval (In Vitro Study)', Advanced Dental Journal, 6(2), pp. 281-288. doi: 10.21608/adjc.2023.193838.1265
VANCOUVER
Hakim, O., Sabet, N., Elasfouri, H. The Influence of Separated Instruments Metallurgy on the Incidence of Dentinal Cracks following Retrieval (In Vitro Study). Advanced Dental Journal, 2024; 6(2): 281-288. doi: 10.21608/adjc.2023.193838.1265
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