Comparison of the distance between the terminal position and anatomical apical foramen after final root canal enlargement between two different conditions of Tri Auto ZX2

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  • トライオートZX2の2つの異なる使用法で行った根管拡大形成における最終根管拡大形成後の終末位置と解剖学的根尖孔までの距離の比較検討

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<p>Abstract : Purpose : The aim of this study was to evaluate the distance between the terminal position and anatomical apical foramen after root canal preparation using tri-auto ZX2 with two different methods : the position at ‘0.5’ and the position of 1.0 mm subtracted from ‘Apex’ as the working length.</p><p> Methods : Thirty J-shaped simulated resin canals were randomly divided into two groups (N=15 in each group). Group 1 was set at the position when the flashing bar of tri-auto ZX2 with apical action reached the level at which the word ‘0.5’ appeared on its LCD screen during root canal preparation. Group 2 was prepared with the position of 1.0 mm subtracted from ‘Apex’ as the working length without apical action. All canals were prepared with NEX files with tri-auto ZX2. The distance between the apical foramen and terminal position after final preparation was measured by stereomicroscope. The data was analyzed using Student’s t-test.</p><p> Results : The distance was 0.50±0.24 mm in Group 1 and 1.10±0.28 mm in Group 2 and the difference was significant (p<0.05).</p><p> Conclusion : The distance between the working terminal position and apical foramen after root canal preparation was significantly shorter in Group 1 than in Group 2.</p>

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