In vitro comparative evaluation of cleaning efficacy and volumetric filling in primary molars: Cone beam computed tomography evaluation

Abstract

Introduction:Pulpectomy of primary teeth is mostly carried out with hand files and broaches which is tricky and time consuming procedure. The development of new design features like varying tapers, non-cutting safety tips and varying length of cutting blades have resulted in new generation of rotary instruments.Aim:To compare and evaluate cleaning efficacy, canal preparation and volumetric filling using conventional files and rotary V Taper files through cone beam computed tomography.Materials and Method:Thirty extracted primary molars were selected. The teeth were randomly divided into three groups each containing 10 teeth i.e. 30 canals in each group. Group A was instrumented with K files; Group B rotary V Taper files and Group C was Hybrid group. Sodium hypochlorite (1%) was used for irrigation. Root canal filling was done with Zinc Oxide Eugenol cement in all groups. The volumetric analysis i.e. Percentage of Volume (POV) of the root canal filling in primary molars was done through CBCT Software.Result:In present study, p- value was found to be significant (<0.05). Almost 100% of canals of hybrid group were fully filled and 63.3% of canals of hand filing group were partially filled. The filling was found to be dense and no. of voids was least in hybrid group.Conclusion:Clinical time required in primary molar endodontics, especially with unpredictability and difficulty of canal morphology, is inevitable. The study confirms superior ability of rotary-file systems to shape severely curved canals with less time and significant decrease in procedural errors like partial filling, voids and inappropriate canal preparation.

Root canal obturation materials and filling techniques for primary teeth: In vitro evaluation in polymer‐based prototyped incisors

“…The majority of laboratorial studies have employed ZOE as the gold standard obturation material, evaluating different filling techniques or different obturation materials on an isolated approach. Some studies used radiographs as evaluation method, resulting only in a bidimensional interpretation .…”

“…Some studies used radiographs as evaluation method, resulting only in a bidimensional interpretation . Others used spiral CT scans or cone beam CT which also allows a tridimensional interpretation, but with very low resolution and image quality compared with micro‐CT. The use of the micro‐CT, a high‐resolution non‐destructive method, allows quantification and localization of the voids along the root canal and a tridimensional evaluation of the quality of the filling, by allowing a detailed quantification of the percentage volume of filled canals …”

Usage of Rotary Instruments in Root Canal Therapy of Deciduous Teeth - Review

“…30 Although there is a study which found no significant difference in terms of apical sealing quality between ProTaper, Mtwo rotary instruments and K-type files 31 , most studies reported that filling density and sealing quality were higher when the tooth preparation was performed using the rotary instruments or the hybrid method. 24,30,32,33 The Mtwo rotary instrument system was reported to show better sealing and higher filling volume in a study comparing Mtwo and K-type files, although, gaps were observed in the canals of the two groups after filling. 32 Although apical leakage was observed in all deciduous teeth prepared with Hero642, Race, Mtwo, ProTaper rotary instruments and K-type files, the highest leakage value occurred with Ktype files.…”

“…The hybrid method was reported to clean smears and debris better and to create more successful canal filling with better shaping. 17,24 Rotary instruments working with reciprocal movements such as Reciproc and WaveOne were shown to provide more successful cleansing compared to rotary instruments working with rotation movement and were recommended to be used for deciduous teeth. 16,25 In conclusion, the studies comparing the cleansing efficacies of rotary instruments and stainless steel files revealed no statistically significant difference between the two methods.…”

Comparison of endodontic disinfection of primary teeth root canals using rotary and reciprocating system: An in vitro study

“…However the usage of rotary instrumentation in the field of pediatric dentistry was able to shortening the treatment time and to reduce the fatigue of patient and professional. Furthermore, it was also possible to achieve a high quality biomechanical preparation, which results in uniform and more predictable obturations as well as high degree of cleanness (Pinheiro et al, 2012;Musale & Mujawar, 2014;Katge et al, 2014;Ramanazi et al, 2016;Deshpande, Joshi & Naik, 2017), due to the tapered shape, which leads to a better root filling (Barr, Kleier & Barr, 2000;George et al, 2016;Deshpande, Joshi & Naik, 2017). These aspects assure its usage in pediatric dentistry, since time is key to properly manage the child behavior during the procedure (George et al, 2016;).…”