Syed Abrar Ali, Tasleem Hosein, Arshad Hasan, Saqib Rashid.
In Vitro Comparison Of The Apical Seal Obtained By Resin Based And Calcium Hydroxide Based Sealers.
J Pak Dent Assoc Jan ;22(2):104-7.

OBJECTIVE: The objective of this study was to compare micro-leakage of the apical seal obtained by resin based and calcium hydroxide based sealers. MATERAIL AND METHOD: One hundred extracted single rooted human teeth were collected from the Department of Oral Surgery of Fatima Jinnah Dental College Hospital Karachi over the period of one year and randomly assigned into two groups of 50 teeth each G1 ( CaOH based sealer , Seal Apex )and G2 (Resin based sealer , AH26). The teeth were sectioned at the cement-enamel junction and the roots were stored in saline for a week .The canal were prepared with step back technique under 5.25 % Sodium Hypochlorite irrigation and Gates Glidden was used for coronal flaring. Teeth in both groups were obturated using a standard cold lateral condensation technique. The root canal sealer used in group 1 was Sealapexand in group 2 was AH26.The roots were then suspended in 2% methylene blue solution for 1 week and left to dry for 24 hours. The roots were longitudinally sectioned using a separating disc. A millimeter scale was used to measure the distance from the apical foramen to the most coronal dye penetration point. Measurements were recorded and means were calculated. SPSS (version 11) was used to compare the mean dye penetration for G1 and G2 with “T” test at 95 % level of significance. RESULT: The mean dye leakage value for Group 1 (AH26) was 2.69 mm (±0.58)while Group 2 (Sealapex) demonstrated mean dye leakage of 4.36 mm (±0.75). The difference was statically significant. (p<0.05) CONCLUSIONS: Resin based sealer (AH26) resulted in less leakage in comparison to CaOH based sealer (Sealapex).

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