Abhilash, A (2011) Effect of Passive Ultrasonic Irrigation on the Cleanliness of Dentinal Tubules in Endodontic Retreatment With and Without Solvent: Sem Study. Masters thesis, Ragas Dental College and Hospital, Chennai.
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Abstract
This Invitro study was done to evaluate the effect of ultrasonic irrigation on the cleanliness of dentinal tubules during endodontic retreatment with and without the use of solvent. Thirty six roots (mesiobuccal or distobuccal) of maxillary molars having curvature between 15º to 25º were obturated with gutta-percha and AH Plus sealer by lateral condensation method. After 2weeks of storage at 100% humidity for 2 weeks the samples were divided into four groups of 9 samples each. In group I retreatment was performed with protaper universal retreatment files with the aid of Endosolv-R solvent. In group II retreatment was performed with protaper universal retreatment without using any solvent. Time was recorded for endodontic retreatment. In group III retreatment was performed with protaper universal retreatment files with the aid of Endosolv-R solvent followed by passive ultrasonic irrigation with 3%NaoCl. In group 1V retreatment was performed with protaper universal retreatment without using any solvent followed by passive ultrasonic irrigation with 3%NaoCl. All 9 samples from each groups were split longitudinally using safe sided flexible diamond discs and the split root halves washed with 0.5ml of saline for removing any cutting debris. The coronal middle and apical thirds of root halves were examined using SEM at a standard magnification of 2000X. The total number of dentinal tubules and the number of dentinal tubules either completely or partially filled with materials were evaluated for the coronal,middle and apical third. CONCLUSION: Within the limitations of this study it can be inferred that 1. The use of Endosolv-R solvent with protaper NiTi rotary retreatment files during non surgical endodontic retreatment on curved root canals of mesiobuccal and distobuccal roots of maxillary 1st and 2nd molars revealed more gutta-percha /AH Plus sealer remnants on the root canal walls. 2. The use of passive ultrasonic irrigation after retreatment further enhances the removal of remaining debris inside the root canal walls and thereby reveals more number of open dentinal tubules in the SEM study, compared to other experimental groups. 3. In all the experimental groups, more number of open dentinal tubules were observed in the middle third, reduced number in the coronal third and least in apical third. 4. The use of solvent during retreatment is more time consuming in removing the gutta-percha/AH Plus sealer. 5. It was impossible to remove all the traces of gutta-percha/sealer remnants from the root canal walls of curved roots, regardless of the instrumentation and irrigation techniques used.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Passive Ultrasonic Irrigation ; Cleanliness ; Dentinal Tubules ; Endodontic Retreatment ; With and Without Solvent ; Sem study. |
| Subjects: | DENTAL > Conservative Dentistry and Endodontics |
| Depositing User: | Kambaraman B |
| Date Deposited: | 14 May 2018 03:19 |
| Last Modified: | 14 May 2018 03:19 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/7809 |
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