Showing papers by "José F. Siqueira published in 2023"
TL;DR: In this paper , the authors report on 2 maxillary impacted canines from different patients that showed ECR lesions and were surgically removed and histologically evaluated, showing that the pulp space was surrounded by a continuous pericanalar resorption resistant sheet.
1 citations
24 Nov 2022
1 citations
24 Nov 2022
TL;DR: In this paper , the authors compared disinfection and shaping after root canal preparation with either XP-endo Shaper or TruNatomy instrument systems, supplemented by ultrasonic activation of sodium hypochlorite (NaOCl) with either stainless-steel (SS) or nickel-titanium (NiTi) inserts.
TL;DR: In this article , the authors evaluated and compared the shaping ability of four rotary instrument systems in long oval root canals using microcomputed tomographic (micro-CT) evaluation.
Abstract: AIM
This study evaluated and compared the shaping ability of four rotary instrument systems in long oval root canals using microcomputed tomographic (micro-CT) evaluation. Currently, there is no data available on the canal shaping abilities of BlueShaper and DC Taper instruments.
METHODOLOGY
Sixty-four single-rooted mandibular premolars were matched based on similar root canal morphologic features as determined by (micro-CT) and randomly assigned to 1 of 4 experimental groups (n=16) according to the instrument system used: BlueShaper, TruNatomy, DC Taper, and HyFlex EDM One File. Changes in the root canal surface and volume, remaining dentine thickness, and number of prepared areas were assessed.
RESULTS
No significant differences were found amongst the four instrument systems for the parameters evaluated (p >.05). There was a significant reduction in the number of unprepared areas and the remaining dentine thickness after each increase in size of the instruments tested (p < .05).
CONCLUSIONS
The four instrument systems perform similarly in long oval root canals. Although none could prepare all canal walls, larger preparations incorporated significantly more surfaces in the final shape.
TL;DR: In this paper , the effects of brushing on shaping with three different instruments were assessed in oval canals, each one with or without brushing: Reciproc Blue, VDW, and Race EVO.
Abstract: The effects of brushing on shaping with three different instruments were assessed in oval canals.Mandibular incisors were assigned to 6 groups (n = 12/group) according to the system, each one with or without brushing: Reciproc Blue, VDW.Rotate, and Race EVO. Micro-computed tomography was performed before and after preparation.Brushing strokes caused no increase in canal volume, surface area, and structure model index independently of the system (p > 0.05), except for RaCe EVO in the full canal surface area (p < 0.05). Brushing did not increase the prepared areas (p > 0.05), except for Reciproc in the apical canal (p < 0.05). Reciproc with no brushing exhibited less pericervical dentin than with brushing (p < 0.05), while RaCe EVO with brushing resulted in less remaining dentin (p < 0.05).The brushing motion had no effects on the overall shaping performance of the 3 instruments tested. An exception was the increase in prepared surface area in the apical canal segment when the Reciproc instrument was used with brushing strokes.