Jorge Vera1, Jorge Ochoa-Rivera2, Marino Vazquez-Carcaño3, Monica Romero4, Ana Arias5, Philippe Sleiman6. 1. Department of Postgraduate Endodontics, University of Tlaxcala, Tlaxcala, Mexico; Private Practice, Puebla, Mexico. Electronic address: jveraro@yahoo.com.mx. 2. Department of Postgraduate Endodontics, University of Tlaxcala, Tlaxcala, Mexico; Private Practice, Jalapa, Mexico. 3. Department of Postgraduate Endodontics, University of Tlaxcala, Tlaxcala, Mexico; Private Practice, Tlaxcala, Mexico. 4. Private Practice, Puebla, Mexico; Department of Endodontics, Benemerita Universidad Autónoma de Puebla, Puebla, Mexico. 5. Department of Endodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California. 6. Department of Endodontics, University of North Carolina School of Dentistry, Chapel Hill, North Carolina; Lebanese University Dental School, Beirut, Lebanon.
Abstract
INTRODUCTION: The positive effect of cryotherapy has been widely described in medicine. The aim of the present study was to validate a new methodology to reduce and maintain external root surface temperature for at least 4 minutes. METHODS: Twenty extracted single-rooted teeth were instrumented to size 35/.06 and subjected to 2 different irrigation interventions with a repeated-measures design using 5% sodium hypochlorite first (control) and 2.5°C cold saline solution later (experimental). In both, 20 mL of the irrigant solution was delivered for a total time of 5 minutes with a microcannula attached to the EndoVac system (Kerr Endo, Orange County, CA) inserted to the working length. The initial and lowest temperatures were recorded in the apical 4 mm with a digital thermometer for both irrigants. Data were analyzed with the repeated measure analysis of variance (Greenhouse-Geisser correction) and Bonferroni post hoc tests. Differences in maintaining a -10°C temperature reduction over 4 minutes were assessed with the Fisher exact test. RESULTS: Although significant differences were found between the initial and lowest temperatures in both the control and experimental irrigation procedures (P < .001), the experimental intervention reduced it almost 10 times that of the control. When maintaining a -10°C temperature reduction over 4 minutes, the teeth in the experimental group also sustained significantly better results (P = 3.047 × 10(-10)). CONCLUSIONS: Using cold saline solution as the final irrigant reduced the external root surface temperature more than 10°C and maintained it for 4 minutes, which may be enough to produce a local anti-inflammatory effect in the periradicular tissues.
INTRODUCTION: The positive effect of cryotherapy has been widely described in medicine. The aim of the present study was to validate a new methodology to reduce and maintain external root surface temperature for at least 4 minutes. METHODS: Twenty extracted single-rooted teeth were instrumented to size 35/.06 and subjected to 2 different irrigation interventions with a repeated-measures design using 5% sodium hypochlorite first (control) and 2.5°C cold saline solution later (experimental). In both, 20 mL of the irrigant solution was delivered for a total time of 5 minutes with a microcannula attached to the EndoVac system (Kerr Endo, Orange County, CA) inserted to the working length. The initial and lowest temperatures were recorded in the apical 4 mm with a digital thermometer for both irrigants. Data were analyzed with the repeated measure analysis of variance (Greenhouse-Geisser correction) and Bonferroni post hoc tests. Differences in maintaining a -10°C temperature reduction over 4 minutes were assessed with the Fisher exact test. RESULTS: Although significant differences were found between the initial and lowest temperatures in both the control and experimental irrigation procedures (P < .001), the experimental intervention reduced it almost 10 times that of the control. When maintaining a -10°C temperature reduction over 4 minutes, the teeth in the experimental group also sustained significantly better results (P = 3.047 × 10(-10)). CONCLUSIONS: Using cold saline solution as the final irrigant reduced the external root surface temperature more than 10°C and maintained it for 4 minutes, which may be enough to produce a local anti-inflammatory effect in the periradicular tissues.
Authors: Abdullah Ahmed Alharthi; Mohammed Hussian Aljoudi; Mulham Naif Almaliki; Majed Abdullah Almalki; Mohammed Abdulwahhab Sunbul Journal: Saudi Dent J Date: 2019-03-14