STEREOMICROSCOPIC EVALUATION OF PRE-STERILIZATION METHODS EFFICIENCY IN REMOVAL OF CALCIUM HYDROXIDE FROM THE SURFACE OF ENDODONTIC INSTRUMENTS

Year 2024, Volume: 48 Issue: 1 , 21 - 29 , 30.04.2024

Emel Uzunoğlu Özyürek , Selen Küçükkaya Eren

https://izlik.org/JA63DC83WB

Abstract

Background and Aim: This study aimed to evaluate the amount of calcium hydroxide (CH) remnants on nickel-titanium rotary instruments after applying different cleaning methods.
Materials and Methods: Fifty ProTaper Gold F2 and 50 ProTaper Next X2 instruments were used, and ten instruments from each file system served as a negative control. The surfaces of the remaining instruments were covered with CH, and ten instruments from each file system were assigned to the positive control group. The instruments in the experimental groups were cleaned with one of the following methods (n=10): Group SB: Instruments were cleaned with a sponge and brushed manually. Group SU: Instruments were cleaned with a sponge and agitated in an ultrasonic bath. Group SBU: Instruments were cleaned with a sponge, brushed manually, and agitated in an ultrasonic bath. After autoclaving, the instruments were examined under a stereomicroscope. The amount of CH remnants in the instruments’ apical and coronal cutting parts were scored. Data was analyzed statistically at p-value <0.05.
Results: The amount of CH remnants was lower on the surface of ProTaper Gold F2 compared to ProTaper Next X2 in Group SB (p=0.029 in the apical part, p=0.013 in the coronal part). Additional use of ultrasonic bath caused significant improvement in the removal of CH from the instrument surface for both file systems (p=0.002). The scores of the apical and the coronal parts were similar in all groups (p=0.157 for ProTaper Gold F2 and p=0.317 for ProTaper Next X2).
Conclusion: Using an ultrasonic bath before autoclaving can be recommended to improve instrument cleaning.

Keywords

Calcium Hydroxide , Endodontics , Sterilization , Ultrasonics

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