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https://ptsldigital.ukm.my/jspui/handle/123456789/457418| Title: | Depth of sealer penetration after ultrasonic tip activation at different levels : an in vitro comparative study |
| Authors: | Nurul Ain binti Ramlan (P71739) |
| Supervisor: | Shalini Kanagasingam, Dr. |
| Keywords: | Sealer placement Endodontic Ultrasonic Dissertations, Academic -- Malaysia |
| Issue Date: | 5-Oct-2016 |
| Description: | Limitations in the sealer placement during obturation were the inability of the sealer to penetrate deep into dentinal tubules and presence of voids at the sealer/dentine interface. Further improvement in the methods of sealer placement was necessary. The aim of this study was to compare the effect of different level of ultrasonic tip activation on depth of dentinal tubules penetration of an epoxy resin–based sealer (AH Plus). Freshly extracted single-rooted premolars (N = 60) were randomly allocated into three groups. The root lengths were standardized at 15 mm. All canals were prepared using rotary ProTaper Universal files up to size F4. The teeth were irrigated with 2.5% sodium hypochlorite and soaked in EDTA 17% for 2 minutes. In the control group (Group 1), AH Plus cement was mixed with 0.1% Rhodamine B dye, and placed in the canal using a size 20 K-file. After placement, the sealer was activated using (ISO 25) ultrasonic tip at 2 mm from the apex for Group 2 while for Group 3, the sealer was activated similarly at 4 mm from the apex. The ultrasonic tip was passively activated for 10 seconds mesiodistally and buccolingually. All teeth were sectioned horizontally at 2 mm, 4 mm and 6 mm from the apex and observed using a stereomicroscope. The percentages of cross-sectional area (μm2) of sealant penetration into dentinal tubules were calculated and presence of voids were recorded. Significant differences in the percentage of sealer penetration into the dentinal tubules were observed between the control group and both the experimental groups (p = 0.00) at 2 mm, 4 mm and 6 mm from the apex. There was no statistically significant difference in the percentage of sealer penetration into the dentinal tubules between both the experimental groups (p > 0.05). The presence of voids recorded between all the groups was not statistically significant (p > 0.05). In conclusion, passive ultrasonic activation of sealer placement resulted in deeper sealer penetration into the dentinal tubules even at a higher level of tip activation (4 mm).,Ijazah Doktor Pergigian Klinikal |
| Pages: | 68 |
| Call Number: | WU20.5.N974d 2016 9 |
| Publisher: | UKM, Kuala Lumpur |
| Appears in Collections: | Faculty of Dentistry / Fakulti Pergigian |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_85571+Source01+Source010.PDF Restricted Access | 1.96 MB | Adobe PDF |  View/Open |
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