Comparison of the effect of fixed and variable taper on the volume of obturation material

Hassan, Aoa; Munshi, I.; Tootla, Saidah

doi:10.17159/2519-0105/2019/v74no1a1

Cited by 1 publication

(1 citation statement)

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“…This indicates that the entire length of the file will engage the whole root canal wall, requiring several numbers of files to complete the preparation [ 38 , 39 ]. The concept of variable tapering root canal preparation was established at Buchanan in 2000, in which the root canal width gradually increases towards the coronal third [ 40 ]. Variable-tapered files have different tapers of increasing and decreasing angles along that portion of the file.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of rotary file system (Kedo-S-Square) in root canal preparation of primary anterior teeth using cone beam computed tomography (CBCT)-in vitro study

2022

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Background In recent years, pediatric endodontics has witnessed various advances including use of rotary files in pulpectomy. This study aimed to comparatively evaluate taper, amount of dentin removal and instrumentation time of the pediatric rotary Kedo-S Square file, hand K-files and H-files in primary canines using cone beam computed tomography (CBCT). Methods 60 primary canines were randomly assigned into three groups; A1 Kedo-S-Square rotary file (group I), hand stainless steel K file (group II) and hand stainless steel H file (group III). Teeth were mounted in vinyl poly siloxane impression material templates to be scanned before and after instrumentation by CBCT scans using Ondemand 3D software. Shaping ability of the files were evaluated in terms of taper of the canal and amount of dentin remaining of each group. Instrumentation time was recorded using a digital stopwatch. Results Kedo-S Square removed a significantly less amount of dentin in both apical (P < 0.002) and coronal thirds (P < 0.014). Taper of the preparations showed significant differences as Kedo-S Square file showed good taper in maximum number of root canals, while maual K- and H-files showed poor taper in maximum number of root canals (P < 0.0001). Rotary Kedo-S Square files required less instrumentation time (P < 0.0001). Conclusion The use of rotary Kedo-S Square files resulted in better conservation of tooth structure, superior tapering ability and least instrumentation time compared to hand K- and H-files.

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Section: Discussionmentioning

confidence: 99%