Comparative Evaluation of Sealing Ability of the Lateral Condensation and the Protaper Single Cone Obturation Technique After Canal Preparation by the Protaper Niti Rotary System – An In Vitro Study

Mudit Uppal , Gurleen Kaur


Objective : To compare the area occupied by gutta-percha, sealer and voids in simulated curved canals filled with a standardized single protaper gutta-percha point or with cold lateral compaction of 0.02 gutta-percha points.

Materials and Methods : 20 simulated canals in resin blocks with 30o curvature and 17mm length were taken. Working length established by size 10 K file, canals were instrumented and prepared using protaper rotary system in crown down sequence and then divided into 2 group of 10 specimen each. In the group I specimen were obturated with 0.02 taper gutta-percha cones and AH plus sealer using lateral compaction. The group II specimen obturated with single protaper cone equivalent to F3 size protaper instrument and AH plus sealer. All specimens sectioned horizontally at 0.5mm, 1.5mm, 2.5mm, 4.5mm, 7.5mm and 11.5mm with universal tool milling machine. Sections were viewed under a stereomicroscope. Digital photographs were made using camera attached to stereomicroscope. Digital image analysis was done to measure the cross section area occupied by gutta-percha, sealer and void using Adobe Photoshop, from these values, the percent gutta-percha filled area was calculated. Statistical analysis was done using t-test and Mann-Whitney U-test.

Results : At the 0.5mm, 1.5mm, 2.5mm, 4.5mm, 7.5mm, 11.5mm levels, the single –cone technique yielded significantly higher percentage gutta-percha filled area than lateral condensation technique. Also the time taken to obturate root canal was significantly less in case of group II than group I. Conclusion : These result suggest that single cone technique with tapered gutta-percha cones may yield better filling (measured as percentage gutta-percha filled area) than the lateral condensation technique, at various level from apex of root canal.

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