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- Title
THE CORONAL SEALING ABILITY OF A NOVEL NANO HYDROXYAPATITE -- FILLED ENDODONTIC SEALER.
- Authors
Alomari, S. M. A.; Ab Ghani, Z.; Husein, A.; Masudi, S. M.
- Abstract
Objectives: To evaluate the sealing ability of a novel nano hydroxyapatite (HA)-containing endodontic sealer in preventing coronal leakage before and after post preparation and to compare it with the commercial AH26 sealant. Materials and Methods: A total of 152 extracted human single-rooted teeth were instrumented using NiTi files and the crowns were then amputated. After cleaning and shaping procedure were completed using step back technique, samples were randomly divided into two groups. The two groups were obturated with either gutta percha and AH 26 sealer or gutta percha with the nano HA-containing sealer. All teeth were then stored at 37° C for 7 days to allow the sealer to set. Each group was then further sub divided into two groups where one of them were prepared for post using para-post drill and the other group was left intact. The resulting 4 study groups contained 38 samples per group (n = 38). The teeth were then thermal cycled at 5°C and 55°C in water baths at dwell time of 30 seconds for a total of 500 cycles. External surfaces of the roots were coated with two layers of nail varnish that did not cover the coronal opening. Specimens were then submerged in 2% methylene blue dye for 24 hours. Each root was sectioned vertically into two halves, and microleakage was measured under microscope (x36) by taking the maximum linear dye penetration corono-apically. Micro leakage readings were analyzed by the independent t test (α=0.05). Results: The result showed that there was no statistically significant difference in the coronal sealing ability between the two sealers, before and after preparation for post. The experimental nanoHA-containing and AH26 sealers with post space preparation showed significantly more leakage compared to sealers with no post space preparation. Conclusions: Preparation for post caused a significant decrease in the coronal sealing ability of both sealers. The preparation for post did not create any difference between the performances of the two sealers. The novel nanoHA-containing sealer tested had a comparable coronal sealing ability with the commercial AH26 sealer.
- Publication
Malaysian Dental Journal, 2008, Vol 29, Issue 1, p63
- ISSN
0126-8023
- Publication type
Article