An In Vitro Study of Gutta Percha Removal Commencing from the Root Canal Undergoing Endodontic Retreatment using Different Rotary Instrumentation Systems

BACKGROUND: In the root canal, the tenacity of microbial infection in either or both the periradicular area is the utmost communal source of endodontic failure. The majority of the gutta percha is removed using hand and rotational equipment. AIM OF STUDY: To determine gutta percha removal by effectively utilizing three rotary instrumentation devices all through the endodontic retreatment. OBJECTIVE OF STUDY: To determine amongst the three Nickle-Titanium systems which one is significantly effective in retreatment along with comparison of retreatment efficiency using or avoiding the utilization of solvent. MATERIALS AND METHODS: On 60 newly extracted, single-rooted mandibular premolars, every root canal was sealed using gutta percha and AH Plus sealer utilizing lateral compaction. After that, the samplings were separated into three investigational groups, each with 20 specimens. After that, individual groups were separated into ten specimens. After that, the groups were withdrawn with or without solvent. ProTaper retreatment files, Mtwo retreatment files, and R-Endo files were utilized to eradicate the gutta percha after two weeks. The extent of root canal filling material left in the coronal, middle, and apical thirds was recorded utilizing a stereomicroscope and a computer image processing program. The data was statistically examined using analysis of variance. RESULT: The ProTaper group exhibited a smaller amount of remnant filling material than the supplementary groups in the coronal and middle thirds; however a significant difference amid ProTaper and Mtwo, and Mtwo and R-Endo in the nonsolvent groups (P = 0.05) was concluded. In the nonsolvent group, the Mtwo group showed less leftover filling material. CONCLUSION: The elimination of root canal filling material was found to be equally effective in all systems. However, not a single experimental group could entirely eradicate gutta percha from the root canal.