Cone-beam computed tomography analysis of primary root canals transportation and dentin loss after instrumentation with two-pediatric rotary files

Abstract

Background This in vitro study aims to compare rotary files (Fanta and Zuanba) with manual K files according to the amount of dentin removed and canal transportation in primary mandibular second molars by CBCT images. Methods This experimental study was conducted on 60 extracted human second primary molars. That were divided into three groups according to root canal preparation group "I" instrumented with manual K-files, group "II" instrumented with rotary Fanta files, and group "III" instrumented with rotary Zuanba files. After root canal preparation, teeth were scanned before and after mechanical preparation with CBCT scanner. Then the amount of dentin removed was determined at three levels, including the coronal, middle and apical levels. Data were statically analysed using the Kruskal–Wallis test. Result No statistically significant difference in the amount of dentin removed were noted between the manual and the rotary groups at the coronal and apical RC levels (P = 0.420) and (P = 0.819) respectively but significant difference was noted at the middle third (P = 0.043). Regarding RC transportation, no significant difference was noted among the three groups with the exception of the apical RC level (P = 0.043). Conclusion Although no significant differences were noted between rotary and manual files, the rotary files showed better performance.

Assessment of the Shape and Diameter of the Root Canal and the Risk of Perforation After Using Rotary System Versus Manual Instruments in Extracted Second Primary Molars: An in -Vitro Study

“…H-files had a significantly higher amount of dentin removal at the middle (P<0.001) and the apical (P=0.003) section than Fanta AF files. In overall root section, there was a statistically significant difference between Fanta AF files and H-files (P=0.013), as shown in Table (1).…”

Cone-beam computed tomography evaluation of shaping ability of kedo-S square and fanta AF™ baby rotary files compared to manual K-files in root canal preparation of primary anterior teeth

“…This was in accordance with Mohamed et al [ 5 ]. , who compared the Kedo-S Square, K- & H- hand files in primary canines also, Abd El Fatah et al [ 10 ]. , who compared the Fanta AF™ Baby and Zuanba rotary files with manual K-files in primary mandibular second molars.…”

“…Then, a 16 mm Fanta AF™ Baby rotary file was used to prepare the root canal according to the manufacturer’s specifications using an Endo-Mate DT endodontic motor at 350 rpm and 2 N/cm torque. Four files were used sequentially in the following order: open file #17/0.08, #20/0.04 yellow, #25/0.04 red, and #30/0.04 blue [ 10 ]. The coronal third was prepared for straight-line access using the orifice opener, then negotiate the canal with #10 K-file in a watch-wind motion to full working length, to get a patent canal pathway.…”

“…The root canal transportation was calculated in the mesiodistal dimension using the formula: (M1 − M2)−(D1 − D2) [ 10 ]. If a result value equals 0 (zero), it means there is no transportation, a negative value means there is distal transportation while a positive value means there is mesial transportation.…”

“…The A1-Kedo-S Square file has a 0.38 mm tip diameter and is color-marked with green and black bands on its handle [ 5 ]. Another lately introduced pediatric rotary file is Fanta AF™ Baby file which is made of specially heat-treated wire AF wire (AF TM -H) with superior mechanical properties and incredibly excellent resistance to frequent fatigue [ 10 ]. Pediatric rotary file systems are supposed to minimize debris extrusion, facilitate root canal obturation, provide consistent shaping and filling, and safeguard the original root canal anatomy [ 11 , 12 ].…”