Comparison of five single-file systems in the preparation of severely curved root canals: an ex vivo study

Liu, Yina; Chen, Meizhi; Tang, Weilong; Liu, Chang; Du, Minquan

doi:10.1186/s12903-022-02668-3

Cited by 5 publications

(3 citation statements)

References 49 publications

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“…They are precise, conservative, and cleaner. The cutting bevel is 90° to the long axis of the root, which reduces the number of patent dentinal tubules at the open end and minimizes microleakage [ 18 ].…”

Section: Discussionmentioning

confidence: 99%

Comparison of the Microleakages of Four Root-End Filling Materials: An In Vitro Study

S.¹,

Azhar²,

Manan³

et al. 2023

Cureus

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Introduction: When a nonsurgical endodontic treatment is ineffective, surgery is necessary. This entails putting a retrofilling to seal the tooth’s apex. Exposing the lesion, performing a curettage, exposing the root apex, resecting it, preparing the root end, and lastly filling the cavity with the proper material are all steps in endodontic surgery. Thus, the aim of this study is to compare the apical microleakage of four root-end filling materials in cavities prepared using ultrasonic retro tip in in vitro conditions. Materials and Methods: An in vitro study was conducted on 60 extracted single-rooted teeth and was cut at the cementoenamel junction (CEJ). They were biomechanically prepared and obturated. Apical 3 mm root-end resection was done using a diamond disc. Root-end cavities were made using an ultrasonic retro tip. Teeth were separated into four groups and filled with SuperEBA ®️ ethoxy-benzoic acid (EBA; Keystone Industries, New Jersey), mineral trioxide aggregate (MTA), Biodentine (Septodont, France), and TotalFill Bioceramic Root Repair Material (BC RRM; FKG Dentaire Sàrl, Switzerland). The samples were kept in methylene blue dye and split longitudinally. The degree of dye penetration was observed under a stereomicroscope and scored. Finally, the results were analyzed. Results: TotalFill BC RRM and Biodentine showed the least apical microleakage (p <0.05). Group 1 samples had the highest mean microleakage, followed by Group 2, Group 3, and Group 4 samples. Conclusion:All of the sample groups showed some evidence of microleakage, but not all of the samples showed leaking. SuperEBA (Group 1) demonstrated the highest microleakage when compared to the other groups.

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Section: Discussionmentioning

confidence: 99%

Comparison of the Microleakages of Four Root-End Filling Materials: An In Vitro Study

S.¹,

Azhar²,

Manan³

et al. 2023

Cureus

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“…The removal of bacteria, their products, and other pathogenic factors is fundamental to the treatment of infected root canals, which are cured by appropriate root canal treatment in approximately 90% of cases [ 1 , 2 ]. Nickel–titanium files have improved the technical quality of root canal shaping and the cleaning effect, enhancing the clinical outcome of root canal treatment [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. However, in root canal treatment of teeth with a calcified canal, ledge, step, or other obstruction of the root canal, the instruments fail to touch the root canal wall, and the treatment outcomes are not as good [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Cauterization of Narrow Root Canals Untouched by Instruments by High-Frequency Current

2023

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The mechanical removal of bacteria is fundamental to the treatment of infected root canals, but complete sterilization of biofilms tends not to extend to uninstrumented areas. However, during electrical conduction to a root canal filled with a conductor, the higher impedance where the root canal is narrower generates Joule heat that may result in a large temperature increase and sterilization. The effect of a high-frequency electric current on the wall of a simulated narrow root canal was investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). Simulated root canals, 0.1 mm in diameter, were prepared in dentine blocks. The root canal wall was treated with Plank-Rychlo solution for 5 min to create a decalcified layer. The simulated root canal was filled with either saline or NaClO, and 150 or 225 V at 520 kHz was applied for 0 s, 1 s, or 5 s. As the conduction time increased, and when the saline was replaced with NaClO, the proportion with a flat decalcified surface decreased, dentinal tubules and a lava-like morphology were significantly more evident on SEM (p < 0.01), and EDS showed significant decreases in carbon and oxygen and increases in calcium (p < 0.01). It was concluded that filling uninstrumented root canals with NaClO and using electrical conduction for 5 s could incinerate and eliminate the organic material of the root canal wall. The application of high-frequency electric current may lead to the cure of many cases of persistent apical periodontitis.

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“…The flexibility of the instrument enables it to rotate centrally within the canal, reducing alterations to the endodontic anatomy. When an endodontic instrument passes through a curved canal, it tends to work more on the outer portion of the curve, particularly if the instrument is rigid [45][46][47]. Since it is rare to find a perfectly straight canal in nature, with most canals having varying degrees of curvature, especially in the apical portion, a rigid instrument is more likely to cause apical transportation [22,31,32,[34][35][36][37][48][49][50][51][52].…”

mentioning

confidence: 99%

Apical Transportation of Apical Foramen by Different NiTi Alloy Systems: A Systematic Review

Puleio,

Bellezza,

Torre

et al. 2023

Applied Sciences

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Endodontic shaping can lead to canal and apical anatomical alterations, which may compromise the outcome of root canal treatment. The objective of this systematic literature review is to assess whether the use of martensitic endodontic instruments can result in less apical transportation compared to austenitic instruments during endodontic therapy. A search was conducted on PubMed, Ovid MEDLINE, and the Web of Science. The inclusion criteria were in vitro studies comparing apical transportation using endodontic instruments with austenitic or martensitic alloys. The search of the scientific databases yielded 592 results, of which only 10 were eligible for evaluation after screening. Based on the analysis of the selected articles, it can be concluded that martensitic endodontic instruments result in less apical transportation compared to austenitic instruments during the shaping phase of endodontic treatment. This behavior can be attributed to the increased flexibility of martensitic instruments. Further research is warranted to further explore this topic and provide additional evidence supporting the use of martensitic instruments in clinical practice.

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Comparison of five single-file systems in the preparation of severely curved root canals: an ex vivo study

Cited by 5 publications

References 49 publications

Comparison of the Microleakages of Four Root-End Filling Materials: An In Vitro Study

Comparison of the Microleakages of Four Root-End Filling Materials: An In Vitro Study

Cauterization of Narrow Root Canals Untouched by Instruments by High-Frequency Current

Apical Transportation of Apical Foramen by Different NiTi Alloy Systems: A Systematic Review

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