In vitro evaluation of apical debris extrusion between 5 mechanized systems

• DOI: https://doi.org/10.22533/at.ed.159472412015

• Palavras-chave: Root canal preparation, Endodontics, Symptom flare-up

• Keywords: Root canal preparation, Endodontics, Symptom flare-up

• Abstract: During instrumentation of the root canal system, a layer of organic and inorganic residues, necrotic tissue and bacteria is formed, called debris. When debris is extruded for apical tissues, complications, “flare-up” can occur. Objective: to evaluate, in vitro, the extrusion of debris caused by 5 mechanized without preparation of the root canal system. Material and method: 75 human lower incisors with 1 canal, crowns were removed and divided into 5 groups (n = 15 teeth/group): G REC was prepared with Reciproc®, G WAO with WaveOne Gold®, G PRR with Prodesign R®, G PRT with Protaper Next® and G PRS with Prodesign S®. Each tooth was fixed into an eppendorf, which had its mass previously measured. The irrigating solution used was distilled water which, together with the generated debris, was stored in the eppendorf. After the water evaporated, its mass was again evaluated, calculating the difference between the first and the second weighing. Result: G REC and G PRS had the smallest extrusion, while the greatest extrusion was observed in the group G WAO. The comparisons between G REC X G PRR (p = 0.9964), G REC X G PRT (> 0.9999) and G PRR X G PRT (p = 0.9868) had no statistically significant difference. Conclusion: extrusion of debris depends on several factors such as the technique of the instrument, cone and cross section, highlighting that none of these factors should be evaluated in isolation. G PRR shows the best behavior, with less debris extracted among the instruments used.