•Purpose: to compare hybrid technique (lateral and continuous wave) to continuous wave technique for adaptation of obturation material.
•N= 56 MB root for mandibular molar.
•Curvatures of the teeth was assessed then sample was stratified and assigned randomly to 2 groups.
•Canals was instrumented to size 6 series 29 profile/0.06, 0.5 from the end of the root with water irrigation only.
•G1: fine/medium cone cut to tip size 40 was placed, system B plugger inserted to binding point, after 10 sec. a burst of 2 sec heat the plugger was removed.
•G2: cone ISO 40, spreader was inserted to 1-2 mm from WL, 3 FF accessory cones inserted then cut-back done same as G1.
•For both groups ZOE sealer was used, depth of the plugger penetration from WL was measured.
•Teeth were sectioned at 1 mm and 3 mm, photographed, evaluated by 4 blinded investigators
•Score 1: gutta-percha adaptation (contact) to all of the prepared root surface with minimal sealer. 2: gutta-percha adapting to 2⁄3 of the prepared root surface. 3: adaptation of gutta-percha to less than 1⁄3 of the prepared root surface
Most highlighted Results:
•No statistically significant difference between 2 techniques.
•For continuous wave group ,No statistically significant difference was found when depth of the plugger. •
Best results (adaptation) noticed when plugger was inserted to 3.5-4.5 mm from WL
Both lateral and continuous wave condensation were equally good