Objective: The objective of this study was to compare 2 preparation techniques performed under simulated clinical conditions with extended apical enlargement following determination of the optimal apical preparation size (APS).
Study Design: After preflaring 240 root canals, APS was evaluated as outlined in Part I. The apical portion was shaped to APS either with rotary NiTi Lightspeed instruments (LS) or NiTi hand instruments (HA) using the balanced force technique in a phantom head. After sectioning the apical area at 3 levels, every cross section was analyzed microscopically for circumferential removal of canal wall dentine. Loss of working length, instrument separation, and perforation were additionally recorded.
Results: In 70% (LS) and 69% (HA) of the root canals, 2 of 3 levels demonstrated that the root canal dentin was cut circumferentially. Neither loss of working length nor perforation occurred in both groups. Four LS instruments separated.
Conclusions: APS frequently results in a nearly complete apical preparation regardless of the preparation techniques. In a few cases apical enlargement to APS does not achieve complete cutting of the canal walls. There was a rather slight risk of serious procedural errors.
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http://dx.doi.org/10.1016/j.tripleo.2005.11.014 | DOI Listing |
Plants (Basel)
December 2024
College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.
Cell Signal
January 2025
Department of Pediatric Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325038, Zhejiang, China; Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China. Electronic address:
Fructose, as a natural and simple sugar, is not significantly harmful to the human body when consumed in moderation and can provide energy for the body. High-fructose diets have been linked to an increased risk of a range of metabolic disorders, including hypertriglyceridemia, hypertension, and diabetes mellitus. These conditions are known to be associated with an elevated risk of developing cardiometabolic diseases.
View Article and Find Full Text PDFPlant Cell Physiol
December 2024
Graduate Institute of Biotechnology, National Chung Hsing University. 145 Xingda Rd., South Dist., Taichung City 40227, R.O.C, Taiwan.
Plasmodesmata are cell-wall-embedded channels that evolved in the common ancestor of land plants to increase cell-to-cell communication. Whether all the fundamental properties of plasmodesmata emerged and were inherited in all land plants at the same time is unknown. Here we show that the bryophyte Marchantia polymorpha (a non-vascular plant) forms mostly simple plasmodesmata in early-developing gemmae.
View Article and Find Full Text PDFJ Korean Med Sci
December 2024
Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea.
Background: Hypertrophic cardiomyopathy (HCM) needs careful differentiation from other cardiomyopathies. Current guidelines recommend genetic testing, but genetic data on differential diagnoses and their relation with clinical outcomes in HCM are still lacking. This study aimed to investigate the prevalence of genetic variants and the proportion of other cardiomyopathies in patients with suspected HCM in Korea and compare the outcomes of HCM according to the presence of sarcomere gene mutation.
View Article and Find Full Text PDFEur Endod J
December 2024
Department of Conservative Dentistry and Endodontics, University of Jammu, J and K, Indira Gandhi Government Dental College Jammu, India.
Objective: The present study aimed to evaluate the effect of heat-treated nickel titanium (NiTi) files TruNatomy and XP- Endo Shaper on the major apical foramen deformation and enlargement in curved root canals using area, circularity, and Feret's diameter ratio.
Methods: Sixty mesio-buccal roots of maxillary and mandibular molars with Vertucci type II root canal were selected. The teeth were decoronated using a carborundum disc.
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