Pushpalatha, K (2020) Evaluation of the Effect of Various Intracanal Medicaments on the push-out bond strength of a resin based endodontic sealer to the root canal dentin after using 95% ethanol as a final irrigant: An In vitro study. Masters thesis, Vivekanandha Dental College for Women, Tiruchengode.
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Abstract
Endodontic therapy also known as endodontic treatment or root canal therapy, is a treatment sequence for treating the infected pulp which results in the elimination of infection and protection of the decontaminated tooth from future microbial invasion. Root canals and their associated pulp chamber are physical hollows present within a tooth that are naturally inhabited by nerves, blood vessels and, various cellular entities. Together, they constitute the dental pulp. Root canal therapy involves removal of these structures, subsequent shaping, cleaning, with endodontic instruments, irrigating solutions, and then finally obturating (filling) the prepared canals using gutta-percha coated with the sealer having a high capability to bond to dentin to achieve a proper seal. Bacteria remaining in the root canal system and, their proliferation might exert adverse effects on the outcome of endodontic treatment. Although root canal treatment procedures have made a lot of progress in recent years, no single technique can completely debride the root canal system free of microbes. Hence, researchers have recommended the use of intracanal medicaments to decrease bacterial counts in the root canals. AIM AND OBJECTIVES: The purpose of the present in vitro study is to evaluate the use of 95% Ethanol as final rinse to remove various intracanal medicaments and to evaluate the bond strength of Resin based endodontic sealer to root dentin using push - out test. The objective of the present study is to compare the removal of calcium hydroxide, metapex and triple antibiotic paste using 95% ethanol as final irrigant and to evaluate the bond strength of the resin based endodontic sealer by using Universal testing machine. To assess the modes of bond failure between the interface of the sealer, canal wall and the obturating core using a Stereomicroscope at 32X magnification. One hundred and eight single - rooted maxillary central incisors with mature apices were selected for the present study. The working length was determined. Samples were divided into 3 groups. Group 1 (n=36/group): Calcium hydroxide mixed with distilled water, Group 2 (n=36/group): Calcium hydroxide+Iodoform, Group 3 (n=36/group): Triple antibiotic paste. The access cavity was then sealed with Cavit and the samples were incubated under 37 0C at 100% relative humidity for 2 weeks. After 2 weeks the samples were further sub divided as follows to remove intracanal medicaments. A single gutta percha cone of size F4 was then coated with AH Plus sealer and placed into the canals. The access cavity was sealed with Cavit and the specimens were stored in 100% relative humidity at 37°C for 2 weeks. After two weeks push‑out test was performed. After the test procedure, each specimen was visually examined under a stereomicroscope at 32X magnification to evaluate the failure type. The results were statistically analysed using Student "t" test and ANOVA. CONCLUSIONS: It was observed that the there was considerable increase in the pushout bond strength values of all samples where 95% ethanol was used as a final rinse, followed by passive ultrasonic irrigation only and the least being the use of distilled water for removal of intracanal medicaments. The modes of failure was visualized using a Stereomicroscope at 32 X magnification and was categorized as cohesive, adhesive and mixed failure. Cohesive and mixed failure modes accounted for most of the failures when compared to that of Adhesive failure for all the three subgroups.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | 241717553 |
| Uncontrolled Keywords: | Intracanal Medicaments, push-out bond strength, resin based endodontic sealer, root canal dentin, 95% ethanol, final irrigant. |
| Subjects: | DENTAL > Conservative Dentistry and Endodontics |
| Depositing User: | Subramani R |
| Date Deposited: | 22 Feb 2021 17:34 |
| Last Modified: | 23 Feb 2021 00:27 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/14429 |
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