Comparison of root surface roughness induced by hand and ultrasonic instrumentation on treated molars: an in vitro study

Ivanovska-Stojanovska, Marija and Popovska, Mirjana and Dimova, Cena and Spasovski, Spiro and Radojkova-Nikolovska, Vera and Mitik, Kristina and Tasevska, Angela (2018) Comparison of root surface roughness induced by hand and ultrasonic instrumentation on treated molars: an in vitro study. Knowledge - International Journal, Scientific Papers, 26 (4). pp. 1335-1340. ISSN 2545-4439

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Objective: To compare the effects of hand and ultrasonic instrumentation on root surface of treated molars.
Materials and Methods: 20 molars extracted from orthodontic reasons were followed in vitro. After extraction, the teeth are washed with distilled water, kept at room temperature in phosphate buffer solution pH 7,0. At mesial and distal cervical third of the roots were formed parallel grooves using carbide borer .The first groove is made 3 mm over enamel-cement junction(ECJ) of the crown, and the second is 3 mm under ECJ (in apical direction).This zone is treated in two ways: manually treated samples (hand instrumentation) using Gracey curettes 5-6 (Gracey; Hu-Friedy, Chicago, IL, USA), and ultrasound treated (KAVO, SONIC flex 2000 , number 5 - 6; frequency 6000 Hz). After 48 hours, samples were examined by scanning electron microscope, SEM model VEGA3LMU. Samples were examined with magnification ranging from 17 x to 300 x. Additional SEM micrographs with magnification higher than 300x were taken for detailed examination. The presence of fissures and cracks in 1mm² are calculated with mathematical formula.
Results: Presence of fissures on root surface (cement) of molars treated with hand instrumentation for Z = -5,41 and p <0,001 (p = 0,000) is significantly lower compared to the presence of fissures on root ssurface (cement) of molars treated with ultrasonic instrumentation.
Conclusion: Manual instrumentation is safer in the treatment of root surfaces, as opposed to applied ultrasound instrumentation, causing numerous and wide fissures in molars.
Keywords: root surface, scaling and root planning, ultrasonic instrumentation, manual instrumentation

Item Type: Article
Subjects: Medical and Health Sciences > Basic medicine
Medical and Health Sciences > Clinical medicine
Medical and Health Sciences > Health biotechnology
Medical and Health Sciences > Health sciences
Medical and Health Sciences > Other medical sciences
Divisions: Faculty of Medical Science
Depositing User: Cena Dimova
Date Deposited: 09 Oct 2018 19:26
Last Modified: 09 Oct 2018 19:26

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