Objective: To analyze the change in tooth color produced by two hydraulic and one resin-based sealers by means of spectrophotometry for 3 years.
Methods: Forty maxillary anterior teeth were selected (n = 10 per group). Root canals were prepared by rotary instrumentation and irrigation was performed with NaOCl, which was also used in the final irrigation, followed by saline and activated with Endoactivator. Root canals were then filled using single cone technique. Negative control (NC): gutta-percha filling; Positive control: gutta-percha and AH Plus; experimental groups: gutta-percha and Bioroot RCS/TotalFill BC Sealer. Gutta-percha was cut 2 mm below the cementoenamel junction, the pulp chamber was sealed with flowable composite. The teeth were kept in PBS. Color was measured in the cervical and incisal halves before root canal treatment (RCT), one and six months after RCT, and after one, two and three years, with the Vita EasyShade spectrophotometer; positioned using an individualized splint. ΔE and ΔE were calculated. Two-way ANOVA repeated measures test followed by Bonferroni post-test were performed to analyze the ΔL, Δa*, Δb*, ΔE, and ΔE, considering treatment groups and evaluation periods. Statistical significance was set at p < 0.05.
Results: In the incisal half, in decreasing order of darkening, the groups at three years were ordered according to the ΔE: AH Plus > NC > TotalFill > Bioroot. ΔE values were: 1.38 ± 0.61 NC, 2.37 ± 0.70 AH Plus, 1.86 ± 0.60 BioRoot and 1.53 ± 0.85 TotalFill. In the cervical half, the ΔE values, showed the same descending order, except for Bioroot and TotalFill which alternated the order. The ΔE values were 1.86 ± 0.61 NC, 3.01 ± 0.70 AH Plus,1.89 ± 0.58 Bioroot and 1.65 ± 0.41 TotalFill, with no significant differences between groups and times in both locations.
Conclusions: All groups presented some degree of discoloration. Lightness and b* component were the most influential. Calcium silicate-based cements (Bioroot RCS and TotalFill BC Sealer) produced acceptable levels of discoloration at the end of follow-up.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9900268 | PMC |
| http://dx.doi.org/10.1016/j.heliyon.2023.e13237 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Angioedema due to acquired C1-inhibitor deficiency without hematological condition: a multicenter French cohort study of 34 patients.
J Allergy Clin Immunol Pract
January 2025
Sorbonne Université, service de médecine interne, AP-HP, Hôpital Saint Antoine, F-75012 Paris, France. Electronic address:
Background: Angioedema (AE) due to acquired C1-inhibitor deficiency (AAE-C1-INH) is a rare disease associating recurrent edema of mucosa and skin. Several underlying diseases have been reported, mainly lymphoproliferative diseases and monoclonal gammopathy. However, 15 to 20% of patients never exhibit such a hematological condition.
View Article and Find Full Text PDFSource-dependent absorption Ångström exponent in the Los Angeles Basin: Multi-time resolution factor analyses of ambient PM and aerosol optical absorption.
Sci Total Environ
December 2024
Department of Public Health Sciences, University of Rochester, School of Medicine and Dentistry, Rochester, NY, USA; Institute for a Sustainable Environment, Clarkson University, Potsdam, NY, USA.
Advanced receptor models can leverage the information derived from optical and chemical variables as input by a variety of instruments at different time resolutions to extract the source specific absorption Ångström exponent (AAE) from aerosol absorption. The multilinear engine (ME-2), a Positive Matrix Factorization (PMF) solver, serves as a proficient tool for performing such analyses, thereby overcoming the constraints imposed by the assumptions in current optical source apportionment methods such as the Aethalometer approach since the use of a-priori AAE values introduces additional uncertainty into the results of optical methods. Comprehensive PM chemical speciation datasets, and aerosol absorption coefficients (b, λ) at seven wavelengths measured by an Aethalometer (AE33), were used in multi-time source apportionment (MT-PMF).
View Article and Find Full Text PDFA Prospective Evaluation of Chemokine Receptor-4 (CXCR4) Overexpression in High-grade Glioma Using Ga-Pentixafor (Pars-Cixafor™) PET/CT Imaging.
Acad Radiol
December 2024
Division of Nuclear Medicine and Molecular Imaging, Department of Medical Imaging, Geneva University Hospital, CH-1211 Geneva 4, Switzerland (H.A., H.Z.); Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, Netherlands (H.Z.); Department of Nuclear Medicine, University of Southern Denmark, Odense, Denmark (H.Z.); University Research and Innovation Center, Óbuda University, Budapest, Hungary (H.Z.). Electronic address:
Background: While magnetic resonance imaging (MRI) remains the gold standard for morphological imaging, its ability to differentiate between tumor tissue and treatment-induced changes on the cellular level is insufficient. Notably, glioma cells, particularly glioblastoma multiforme (GBM), demonstrate overexpression of chemokine receptor-4 (CXCR4). This study aims to evaluate the feasibility of non-invasive Ga-Cixafor™ PET/CT as a tool to improve diagnostic accuracy in patients with high-grade glioma.
View Article and Find Full Text PDFInterpolation of Imaging Mass Spectrometry Data by a Window-Based Adversarial Autoencoder Method.
J Am Soc Mass Spectrom
January 2025
Department of Cellular and Molecular Anatomy, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431-3192, Japan.
Article Synopsis
- Imaging mass spectrometry (IMS) is essential for studying the distribution of molecules in samples, but handling large data sets can be time-consuming and resource-intensive.
- This study introduced a high-resolution reconstruction technique using a window-based Adversarial Autoencoder (AAE) to improve the analysis of IMS data from mouse cerebellum and kidney tissues.
- The AAE model outperformed traditional interpolation methods (Bilinear and Bicubic) in image quality, making it a promising tool for large-scale IMS research in animal organ studies.
Use of Lipidic Extracts in the Development of Healthier Pastry Products with Reduced Fat Contents.
Foods
December 2024
MARE-Marine and Environmental Sciences Centre/ARNET-Aquatic Research Network, ESTM, Polytechnic of Leiria, Cetemares, 2520-620 Peniche, Portugal.
Pastry products constitute a significant segment of the food market. However, the high amount of fat used in their production poses a challenge when competing for the attention of modern consumers, who are more conscious of the health problems associated with the consumption of high-fat products. With this in mind, the main objective of this study is the reduction of the total fat and saturated fat contents of two bakery products, brioche-type bread and rice cake, by partial substitution of the main fat source with lipid extracts obtained through non-thermal high-pressure extraction (HPE).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!