A COMPARATIVE EVALUATION OF APICAL TRANSPORTATION AND CANAL CENTRING ABILITY OF DIADENT DIA-X FILE SYSTEM AND WAVE ONE GOLD FILE IN THE APICAL REGION OF CURVED MOLARS USING CONE-BEAM COMPUTED TOMOGRAPHY : AN IN VITRO STUDY

Aim: To compare the centric ability and apical transportation of newer rotary NiTi le system, DIA-X and reciprocating le system Wave One Gold. 40 Human permanent mandibular molars extracted were selected. The crown of each select Methodology: ed tooth was sectioned at the level of the cementum enamel junction using a diamond disc to standardize the root length to 12mm. Pre instrumentation images were taken by CBCT scanning. A glide path was performed through a size 10 K-le. Group One- The canals were prepared using WaveOneGold le system. Group Two- The canal was prepared using DiaDent Dia X le system (According to manufacturer's description). After canal shaping post instrumentation CBCT scans were performed same as pre instrumentation scans. Pre and post-operative CBCT scans were compared, and the transportation in the mesiodistal direction was calculated. The horizontal sections were used, and the dimensions were measured by calculating the shortest distance from the periphery of the un-instrumented canal to the periphery of the tooth in both mesial and distal directions and then compared with the values measured from the prepared canals. The canal centring ratio at each level will be calculated using the formula. Statistical analysis: Expression of Apical Transportation & Canal Centering in the form of Mean & SD for each group. Mann Whitney test was used to compare the mean Apical Transportation & Canal Centering at different distances between two groups. The level of signicance was set at P<0.05. Results: The mean Apical Transportation value at all three levels i.e., apical(3mm), middle(5mm) and coronal(7mm) WOG les showed lesser canal transportation in comparison to DIA-X les, and the results were statistically signicant. The mean canal centering value at all three levels i.e, apical(3mm), middle(5mm) and coronal(7mm) WOG les showed greater canal centering ability in comparison to DIA-X les the results were statistically signicant. Group 1: WOG showed the highest canal centering ability and least apical transportation compared to Group 2: DIA-X . This study focused on behavior of NiTi les in curved canals and their ability to remain center inside, following the natural anatomy of the canal. Conclusion: WOG can be used efciently inside the canal with tolerable value of canal transportation. DIA-X les had considerably higher canal transportation compared to WOG.