Dissolving efficacy of different organic solvents on gutta-percha and resilon root canal obturating materials at different immersion time intervals

Abstract

Background Aim:The purpose of this study was to compare and evaluate the dissolving capability of various endodontic solvents used during endodontic retreatment on resilon and gutta-percha at different immersion time intervals.Materials and Methods:160 ISO no. 40 cones (0.06 taper), 80 each of resilon and gutta-percha were taken as samples for the study. Both resilon and gutta-percha were divided into eight experimental groups of 20 cones (four groups each of resilon and gutta-percha) for immersion in xylene, tetrachloroethylene, refined orange oil and distilled water. Each group was further divided into two equal subgroups (n=10) for 2- and 5-minute immersion time intervals at room temperature to investigate the potential of these solvents for clinical use in dissolving resilon and gutta-percha. Each sample was weighed initially before immersing in the solvent on a digital analytical scale. Distilled water served as a control. Samples were removed from the respective solvents after the specified immersion period and washed in 100 ml of distilled water and allowed to dry for 24 h at 37°C in a humidifier. The samples were then again weighed after immersion in the specific solvent on a digital analytical scale. The extent of gutta-percha or resilon removed from the specimen was calculated from the difference between the original weight of gutta-percha or resilon sample and its final weight. Means and standard deviations of percentage loss of weight were calculated at each time interval for each group of specimens. The values were compared by statistical parametric tests using SPSS 16.0 Software. The data was subjected to paired ‘t‘ test, independent ‘t’ test, one-way ANOVA test and multiple comparisons with Scheffe's test.Results:There was no significance in the amount of gutta-percha dissolved at 2- and 5-minute immersion time intervals in all groups (P>0.05) except the tetrachloroethylene group (P=0.00). There was a very high significance in the amount of resilon dissolved at 2- and 5-minute immersion time intervals in all groups (P=0.00) except the xylene and distilled water (Control) groups (P>0.05).Conclusion:The results showed that xylene, refined orange oil and tetrachloroethylene can be used for softening gutta-percha/resilon during retreatment with various techniques- xylene being the best solvent both for gutta-percha and resilon.

Dissolving Efficacy of Different Endodontic Solvents For Gutta Percha With Varying Time Intervals

“…The ideal gutta percha solvent should not only allow quick and complete removal of all traces of gutta percha from the canal system but also be biocompatible to avoid any periapical irritation or inflammation. 3,4,5 When the canal system is efficiently cleaned and disinfected and periapical healing is achieved, only then can retreatment have a good prognosis. 6,7 Hence the choice of a good solvent depends on the balance between the clinical safety in usage versus its capacity for dissolution.…”

“…Above all, its potential carcinogenicity raises concerns about its use in the future. 1,3,4 Some researchers have mentioned xylene as the best substitute for chloroform as an endodontic solvent 12 whereas others have stated that it has the same efficacy as orange oil. 13 Xylene is an aromatic organic solvent and allows better control of gutta percha during removal as it slowly softens rather than dissolve gutta percha.…”

Evaluation of Capacity of Essential Oils in Dissolving ProTaper Universal Gutta-Percha points

“…Predloženi su različiti načini učinkovitog či-šćenja sustava korijenskih kanala, uključujući ručne instrumente od nehrđajućeg čelika (2, 10), rotirajuće instrumente (11), recipročne sustave (12), ultrazvučne instrumente (3) i korištenje otapala za gutaperku (13).…”

Do the Sealer Solvents Used Affect Apically Extruded Debris in Retreatment?

“…It is generally accepted that none of the instruments or techniques can prepare root canals or remove root fillings without producing some apically extruded debris (6)(7)(8). Several techniques and instruments can be used to remove gutta-percha, including nickeltitanium (NiTi) systems (9), ultrasonic systems (10), laser systems (11), and solvents (12). Resosolv (Pierre Rolland, Merignac, France) is a solvent specifically produced for solving resin-based sealers, such as AH Plus (Dentsply DeTrey, Konstanz, Germany).…”