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Resumen Objetivo: Comparar la capacidad de centrado y el transporte apical de los sistemas Reciproc Blue y XP-endo Shaper en bloques de resina con fotografías pre y posoperatorias yuxtapuestas, mediante un programa de análisis de imágenes. Materiales y Métodos: Se dividieron al azar 20 tacos de resina en dos grupos (n=10) preparados con XP-endo Sha- per y Reciproc Blue respectivamente. Se tomaron fotografías digitales de los tacos, antes y después de la preparación con cada sistema en una misma posición. Luego las fotografías obtenidas fueron yuxtapuestas mediante el software Photo shop. Se midieron las desviaciones del centro del conducto con respecto a la pared interna y externa del mismo en diversos puntos de referencia preestablecidos. Estos datos fueron analizados estadísticamente con el test de ANOVA. Resultados: Ambos sistemas produjeron transporte y desviación respecto a la trayectoria original del conducto radicular, pero el análisis estadístico (ANOVA Factorial 2x8) no cuantificó diferencias significativas entre ambos sistemas (p=0,4044) Conclusiones: Bajo las condiciones de este trabajo, ambos sistemas producen transporte y desviación respecto a la trayectoria original del conducto radicular.
Abstract Aim: To compare the centering capacity and apical transport of the Reciproc Blue and X-Pendo Shaper system in resin blocks with juxtaposed pre and postoperative photographs, using the Photoshop software. Materials and methods: 20 resin plugs were randomly divided into two groups (n=10) that were prepared with XP-endo Shaper and Reciproc Blue respectively. Digital photographs of the blocks were taken, before and after preparation, with each system in the same position. Then the obtained photographs were juxtaposed using Photoshop software. The deviations of the center of the canal, with respect to its inter nal and external wall, were measured at various pre-established reference points. These data were statistically analysed with the ANOVA test. Results: Both systems produced transport and deviation from the original trajectory of the root canal, but the statistical analysis (2x8 Factorial ANOVA) did not quantify significant differences between both systems (p=0.4044) Conclusions: Under the conditions of this work, both systems produce transport and deviation with respect to the original trajectory of the root canal.
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Objective: The objective of this study was to assess and compare the fracture resistance of roots treated endodontically using WaveOne gold, Reciproc blue, AH plus sealer and GuttaFlow Bioseal sealer. Materials and methods: Total 48 human mandibular premolars with single root were decoronated to a length of 13 mm. The roots were arbitrarily divided into 3 main groups (n=16 each group). Group I control group (roots were instrumented but not obturated), Group II obturated with gutta-percha and GuttaFlow Bioseal sealer and Group III obturated with gutta-percha and AH plus sealer. Each main group was additionally divided into 2 subgroups (n=8 each subgroup) conforming to the system used in root canal preparations, Subgroup A: Reciproc blue system and Subgroup B: WaveOne gold system. All root samples were kept for 1 week at 100% humidity to permit the sealers to set completely. Each sample was then exposed to fracture test utilizing a universal test machine, the data were analyzed statistically with one-way ANOVA test, two-way ANOVA test and Dunnett test (2-sided) at a significant level of 0.05. Results: The results revealed that the highest mean value of fracture resistance was noted in Group IIIB (611.125) followed by Group IIIA (543.250), Group IIB (519.875), Group IIA (511.875), Group IB (270.125) and Group IA (267.875) respectively with statistically highly significant differences among the different groups when compared to the control group. Conclusion: From the results of this study, it seems that the use of AH plus and GuttaFlow Bioseal sealers improved the fracture strength of instrumented roots whereas preparation of the root canals with WaveOne gold and Reciproc blue systems without obturation weakened the tooth structures.
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Background: Different instrumentation systems and techniques are used in the instrumentation of the root canal system which can result in debris formation that may be extruded beyond the apical foramen and cause post-operative pain. Aim of the study: Aim of the current study was to compare the amount of apically extruded debris and irrigants during instrumentation using 2 reciprocating single file systems (WaveOne Gold, Reciproc blue) and 2 continuous rotation file systems (ProTaper Gold, 2Shape) and comparing them to the control group (ProTaper Universal). Materials and Methods: Total 50 palatal roots of freshly extracted human maxillary first molars were collected for this study. Teeth were decoronated to a unified length of 15 mm, and then pushed through a pre-perforated rubber cap of pre-weighed glass vial then the root-cap complex was fitted on a glass vial and rubber dam ligated with dental floss was used to cover the glass vial for preventing the coronally extruded debris and irrigants from contaminating the external surface, gauge 25 needle was inserted parallel to the root surface through the rubber dam and cup. Samples were then randomly divided into 5 groups. Results: Data obtained were statistically analyzed using One Way ANOVA and LSD tests. The result showed that all groups resulted in apical extrusion of debris and irrigants, as it showed that the 2Shape Group B, Wave One Gold Group C and Reciproc blue Group D are statistically comparable, while ProTaper Gold Group A and ProTaper Universal Groups E showed statistically significant difference (p<0.05). Conclusions: All of the systems resulted in apical extrusion. There was no influence of kinematic movements on apical extrusion. The 2shape file system produced the least amount of apical extrusion while the ProTaper Universal showed the greatest amount.
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OBJECTIVES: The present study aimed to evaluate the shaping ability of 2 thermally treated nickel-titanium reciprocating systems in simulated curved canals. MATERIALS AND METHODS: Forty simulated canals were prepared to apical size 25 using Reciproc Blue R25 (VDW) and WaveOne Gold Primary (Dentsply Sirona) instruments. Standard pre- and post-preparation images were taken and superimposed. The removal of resin material was measured at 5 standard points: the canal orifice, halfway between the canal orifice and the beginning of the curve, the beginning of the curve, the apex of the curve, and the end-point of the simulated canal. The data were analysed using the independent sample t-test with a 5% significance threshold. RESULTS: The canals in which Reciproc Blue R25 was used showed a significantly greater widening than those in which WaveOne Gold was used at 4 of the 5 measurement points (p < 0.05). The Reciproc Blue R25 instrument removed significantly more resin from the inner aspect of the curve at 2 of the 5 points and similar amounts at the remaining 3 points. At the 2 apical points, there was no significant difference between the Reciproc Blue R25 and WaveOne Gold Primary instruments. CONCLUSION: Both instruments respected the original canal anatomy; however, WaveOne Gold resulted in a more conservative shape with less transportation.
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TransportationABSTRACT
OBJECTIVES: The purpose of the present study was to compare the mean preparation times and frequency with which Reciproc and Reciproc Blue instruments reached the full working length in mandibular molars, with or without glide path preparation. MATERIALS AND METHODS: Previously untreated mesiobuccal and mesiolingual canals with completely formed apices were randomly divided into 6 groups (n = 50) depending on the usage of Reciproc (RC; VDW), Reciproc Blue (RC Blue; VDW), C-Pilot (CP; VDW), and R-Pilot (RP; VDW) files: RC, RC Blue, RC + C-Pilot (RC-CP), RC-Blue + C-Pilot (RC Blue-CP), RC+R-Pilot (RC-RP), and RC Blue + R-Pilot (RC Blue-RP). A glide path was prepared using the hand-operated C-Pilot or the machine-operated R-Pilot instruments, respectively. The χ2 test, analysis of variance, and the Tukey post hoc test were used for statistical comparisons. RESULTS: No statistically significant differences were observed in the distribution of the frequency of reaching the full working length in the RC (94%), RC Blue (88%), RC-CP (94%), RC Blue-CP (90%), RC-RP (96%), and RC Blue-RP (92%) groups (p > 0.05). CONCLUSIONS: Preparation of a glide path did not have a significant effect on reaching the full working length using these systems.