Removal of Radioactively Marked Calcium Hydroxide from the Root Canal: Influence of Volume of Irrigation and Activation
| Autor: | Jessica Wießner, Anselm Petschelt, Ulrich Lohbauer, Thomas Wießner, Johannes Ebert, José Zorzin |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Irrigation medicine.medical_treatment Root canal Mineralogy Calcium Hydroxide 03 medical and health sciences chemistry.chemical_compound Random Allocation 0302 clinical medicine Tooth Apex medicine Humans Therapeutic Irrigation General Dentistry Saline Irrigation procedure Calcium hydroxide Root Canal Irrigants 030206 dentistry Root Canal Therapy 030104 developmental biology medicine.anatomical_structure chemistry Volume (thermodynamics) Sodium hypochlorite Dental Pulp Cavity Citric acid Root Canal Preparation Nuclear chemistry |
| Zdroj: | Journal of endodontics. 42(4) |
| ISSN: | 1878-3554 |
| Popis: | Introduction The purpose of this study was to evaluate the amount of calcium hydroxide (Ca[OH] 2 ) removed by irrigation with different volumes and activation methods. Methods One hundred thirty extracted straight, single-rooted human teeth were instrumented to size 45/.04. One hundred twenty teeth were filled with radioactively marked Ca(OH) 2 and a gutta-percha point; 10 teeth with only gutta-percha served as a negative control. All specimens were stored in saline solution (7 days at 35°C). After storage, teeth were randomly divided into 12 groups ( n = 10). The gutta-percha was taken out, and Ca(OH) 2 was removed either by irrigation with different volumes (0 mL, 0.5 mL, 1 mL, 2 mL, 4 mL, or 8 mL) or mechanical activation with a 2- or 4-mL volume using a file (Instr) (FlexMaster size 45/.04; VDW, Munich, Germany), a brush (CanalBrush [CB]; Coltene/Whaledent, Langenau, Germany), or passive ultrasonic irrigation (PUI, smooth wire). Irrigation was performed by alternating 40% citric acid and 3% sodium hypochlorite. Residual Ca(OH) 2 was measured by scintillation and expressed as a percentage of the original Ca(OH) 2 . Results Increasing the irrigation volume led to a significant decrease ( P 2 (0 mL [98.5%], 0.5 mL [21.7%], 1 mL [16.5%], 2 mL [12.9%], 4 mL [8.7%], 8 mL [5.0%], and negative control [0.0%]). Activation led to less residual Ca(OH) 2 (2 mL Instr [12.0%], 2 mL CB [11.7%], 2 mL PUI [9.1%], 4 mL Instr [8.5%], 4 mL CB [7.4%], and 4 mL PUI [6.2%]), with significant differences according to the PUI ( P Conclusions No irrigation procedure was able to remove Ca(OH) 2 completely. PUI was the most effective activation method. However, irrigation with an 8-mL volume was the most effective. |
| Databáze: | OpenAIRE |
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