Results 151 to 160 of about 20,355 (172)
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Formation and Effect of Dentinal Microcracks After Root Canal Treatment
Journal of Healthcare Sciences, 2023Many potential causes of root fracture have been put forth over the decades, such as theories that the fracture might begin with dentinal microcracks (DM) brought on by dentinal dehydration, post-insertion corrosion, spreader form, or strong movements utilized while filling processes. In the recent times, scientists have found that a sizable proportion
Mohammad Aljifan +10 more
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Journal of the Mechanical Behavior of Biomedical Materials, 2022
The aim of the study was to assess the effect of different experimental conditions on registration of microcracks by means of micro-computed tomography. Twenty roots of permanent lower incisors were instrumented with SAF system, filled with a single-cone technique and retreated with the Pro Taper Universal Retreatment system.
Dragomir Tatchev +3 more
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The aim of the study was to assess the effect of different experimental conditions on registration of microcracks by means of micro-computed tomography. Twenty roots of permanent lower incisors were instrumented with SAF system, filled with a single-cone technique and retreated with the Pro Taper Universal Retreatment system.
Dragomir Tatchev +3 more
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Journal of Endodontics, 2014
This study aimed to evaluate the frequency of dentinal microcracks observed after root canal preparation with 2 reciprocating and a conventional full-sequence rotary system using micro-computed tomographic analysis.Thirty mesial roots of mandibular molars presenting a type II Vertucci canal configuration were scanned at an isotropic resolution of 14.16
Marco Aurélio Versiani +2 more
exaly +3 more sources
This study aimed to evaluate the frequency of dentinal microcracks observed after root canal preparation with 2 reciprocating and a conventional full-sequence rotary system using micro-computed tomographic analysis.Thirty mesial roots of mandibular molars presenting a type II Vertucci canal configuration were scanned at an isotropic resolution of 14.16
Marco Aurélio Versiani +2 more
exaly +3 more sources
The effect of microcracking in the peritubular dentin on the fracture of dentin
Journal of Biomechanics, 2017Dentin is a biocomposite possessing elegant hierarchical structure, which allows it to resist fracture effectively. Despite the considerable efforts to unravel the peculiar fracture behavior of dentin, the effect of microstructural features on the fracture process is largely unknown.
Bingbing An, H. Daniel Wagner
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Is Canal Overinstrumentation Able to Produce Apical Root Dentinal Microcracks in Extracted Teeth?
International Endodontic Journal, 2021AbstractAimTo assess the impact of mechanical overinstrumentation of root canals in extracted teeth on the development of dentinal microcracks in the apical portion of the root by means of micro‐computed tomographic (micro‐CT) analysis. Root canal preparation short of the canal terminus and at the apical foramen (AF) were used as controls ...
Gustavo De-Deus +2 more
exaly +3 more sources
Structural modifications of dentinal microcracks with human aging
Microscopy, 2013Several studies have reported the mechanism of crack propagation with aging. Although structural modifications of dentinal microcracks with aging have been evaluated by observing the cracked surface using scanning electron microscope (SEM), very few attempts have been made at sectional observation of the microcracks inside dentine using transmission ...
Mizuho, Kubo +4 more
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Dentinal microcracks on freshly extracted teeth: the impact of the extraction technique
International Endodontic Journal, 2019AbstractAimTo evaluate the incidence of root dentinal microcracks after two extraction techniques through micro‐computed tomographic (micro‐CT) analysis.MethodologyThirty pairs of premolars, extracted for orthodontic reasons, were assigned to two experimental groups, following a split‐mouth design (n = 30): traumatic technique group (TTG) – teeth ...
F. N. Arashiro +9 more
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A Model of Microcrack Development in Human Tooth Dentin Using Data of Microtomography
Technical Physics Letters, 2020The structure of dentin is characterized by the presence of microchannels—dentinal tubules (DTs) threading through the matrix composed of collagen fibris and hydroxyapatite nanocrystals. The influence of DTs on the resistance of dentin to cracking has been studied on samples prepared from human molar teeth.
T. S. Argunova +2 more
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Clinical Oral Investigations, 2021
To assess the effect of additional apical enlargement using nickel titanium (NiTi) instruments on the incidence of microcracks using micro-computed tomographic analysis.Fifty-one premolars with single canals were enlarged to ProTaper Gold (PTG) F2 (25/08) (Dentsply Sirona), ProFile Vortex Blue (VB) 25/06 (Dentsply Tulsa), or WaveOne Gold (WOG) primary (
Ahmed Jamleh +5 more
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To assess the effect of additional apical enlargement using nickel titanium (NiTi) instruments on the incidence of microcracks using micro-computed tomographic analysis.Fifty-one premolars with single canals were enlarged to ProTaper Gold (PTG) F2 (25/08) (Dentsply Sirona), ProFile Vortex Blue (VB) 25/06 (Dentsply Tulsa), or WaveOne Gold (WOG) primary (
Ahmed Jamleh +5 more
openaire +2 more sources
Comparison of Dentinal Microcracks Formation Using Two Different Rotary Systems and Hand Instruments
European Journal of Medicine and Natural Sciences, 2023Introduction: The endodontic success is attributed to a variety of factors, but one of the most important is canal preparation. Among causes of endodontic failures is vertical root fracture, which may result from gradual propagation of initial dentinal defects.
Valbona Disha +4 more
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