University of Khartoum

Coronal Micro-leakage Of Temporary Filling Materials

Coronal Micro-leakage Of Temporary Filling Materials

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Title: Coronal Micro-leakage Of Temporary Filling Materials
Author: Ibn Idriss Al Edrissy, Hajer
Abstract: Objectives: Temporary filling materials are used in endodontics to prevent contamination of the root canal system during intertreatment visits. The objectives of this study were to evaluate coronal microleakage of four temporary filling materials Cavisol, Litark, Zinc Phosphate, reinforced zinc oxide-eugenol{IRM}) and to compare the sealing ability of the ready made temporary filling materials (Cavisol, Litark) and hand mixed materials (IRM, Zinc phosphate). Materials and methods: standardized class I access cavities (4 x 4mm) were prepared in 80 intact human mandibular and maxillary permanent premolar teeth. They were divided randomly into four groups consisting of 20 samples. Cotton pellets were placed in the pulp chamber assuring that the opening could accommodate at least 4mm of the temporary filling material. Each group was restored with one of the test materials and placed in incubator for 48 hours at 37c . The specimens were then thermocycled (5 to 55 0C for 500cycles). Then the specimens were painted with two layers of nail varnish, with the exception of cavity margins and immersed in 2% methylene blue dye for 10 days for leakage assessment. The teeth were sectioned mesiodistally, and the degree of dye penetration was evaluated under steromicroscope. Grading of the microleakage pattern was from 1 to 3, with 3 providing the best seal. Result were analyzed using one way ANOVA test to determine if a statistically significant difference existed between the groups of the tested materials. Results: The result indicated that microleakage along Cavisol and Litark samples was within grade 3; whereas IRM and zinc phosphate samples absorbed the dye into the bulk of the materials. Cavisol was found to exhibit V the best seal amongst the four tested materials followed by Litark, Zinc phosphate and IRM. Conclusion: Among the four materials tested, Cavisol was observed to provide a consistently tight seal followed by Litark, zinc phosphate and IRM. This indicated that the ready made temporary filling materials have the best sealing ability over hand-mixed ones. These emphasize further need for the importance of correctly placing a sufficient thickness of temporary filling materials in endodontic access cavities to ensure a tight seal. Recommendations: However, because it is not known how the sealing properties will be affected over longer observation periods, or when the material is exposed to the oral environment, this study must be considered preliminary. Further clinical and laboratory experiments are recommended
Description: 54 Pages
URI: http://hdl.handle.net/123456789/7788
Date: 2015-03-31


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