AI Article Synopsis
Article Abstract
Purpose: To evaluate and compare the use of micro-computed tomography (microCT) to investigate the mineral concentration of the treated dentin surface after caries removal with fluorescence-aided caries excavation (FACE) and conventional excavation.
Methods: 20 extracted human teeth with dentin caries were bisected through the lesion center into two halves which were distributed to a FACE and a conventional excavation group. Tungsten-carbide round burs were used for both groups. Each specimen was investigated with microCT after excavation. The obtained images of all the specimens were evaluated using Image J. Based on the grey values, the linear attenuation coefficients were calculated. Four resin-embedded solid hydroxyapatite phantoms with the gradually increased mineral concentration were used to obtain a calibration curve and equation. Finally, the mineral concentration values of the superficial dentin of each specimen after removal and sound dentin were calculated. The data were compared with the Student's t-test.
Results: The statistical results showed that the linear attenuation coefficient (LAC) of the treated surface was significantly lower (P < 0.0001) in the FACE group with a mean value of 2.13 +/- 0.33 cm9-1). The value of the conventional excavation group was 2.98 +/- 0.19 cm(-1). The LAC of sound dentin was 3.89 +/- 0.10 cm(-1). By using the calibration equation, the calculated mineral concentration of the superficial dentin after caries removal were 0.68 +/- 0.14 g/cm3 in the FACE group and 1.05 +/- 0.08 g/cm3 in the conventional excavation group. The mineral concentration of sound dentin was 1.44 +/- 0.04 g/cm3. The mineral concentration of the superficial dentin after caries removal in the FACE group was about 47% of that of sound dentin, while the value in the conventional excavation group was approximately 73% of that of sound dentin. Under the conditions of this in vitro study, the results of the microCT evaluation may imply that FACE was more conservative than conventional excavation.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Assessing Caries Removal Efficacy and Pain Perception in Children, Using Smart Bur Versus Carbide Bur: A Randomized Clinical Study.
Med Sci Monit
January 2025
Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.
BACKGROUND Dental caries removal is conventionally done using carbide burs, but non-metallic polymer burs have recently been developed with the aim of being more selective and causing less pain. The objective of the study is to evaluate and compare the effectiveness of caries removal, time taken, and patient compliance during restorations using smart bur and carbide burs in pediatric patients. MATERIAL AND METHODS A clinical study was designed and conducted at the Pedodontics Outpatient Department, with a focus on 40 children between 6 and 12 years old, who were split into 2 groups consisting of 20 children each: group 1, using a carbide conventional rotary bur, and group 2, using a smart bur.
View Article and Find Full Text PDFProcess optimization, structural characterization, and biological activity of Siraitia grosvenorii polysaccharides by ultrasonic aqueous two-phase extraction.
Int J Biol Macromol
January 2025
Guangxi Key Laboratory of Fruits and Vegetables Storage-processing Technology, Guangxi Academy of Agricultural Sciences, Nanning, China; School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China. Electronic address:
In this research, ultrasound-assisted aqueous two-phase extraction (UA-ATPE) was utilized to isolate polysaccharides from Siraitia grosvenorii (SGPs). Based on the results of model optimization experiments, the extraction parameters were determined. The total extraction rate of SGPs was 25.
View Article and Find Full Text PDFEvaluating multiannual sedimentary nutrient retention in agricultural two-stage channels.
Sci Rep
January 2025
Environmental Geochemistry group, Department of Geosciences and Geography, University of Helsinki, Helsinki, Finland.
The two-stage channel (TSC) design with a vegetated man-made floodplain has been recommended as an alternative to conventional re-dredging for managing suspended sediment (SS) and nutrient loads in agricultural streams. However, there are currently uncertainties surrounding the efficiency of TSCs, since mass balances covering the whole annual hydrograph and including different periods of the channel life cycle are lacking. This paper aims to improve understanding of the medium-term morphological development and sedimentary nutrient retention when a dredged, trapezoidal-shaped channel is converted into a TSC, using a mass balance estimate of nutrient and carbon retention from immediately after excavation until the establishment of approximate biogeochemical equilibrium retention.
View Article and Find Full Text PDFNucleotide distribution analysis of 5'UTRs in genome-scale directs their redesign and expression regulation in yeast.
Metab Eng
December 2024
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; Shanghai Collaborative Innovation Center for Biomanufacturing, 130 Meilong Road, Shanghai, 200237, China. Electronic address:
Non-conventional yeasts have emerged as important sources of valuable products in bioindustries. However, tools for the control of expression are limited in these hosts. In this study, we aimed to excavate the tools for the regulation of translation that are often overlooked.
View Article and Find Full Text PDFStudy on mechanical characteristics of phyllite by conventional triaxial compression under multi-factors coupling action.
Sci Rep
December 2024
College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, China.
Article Synopsis
- Phyllite is a metamorphic soft rock commonly encountered in tunnel excavation, posing construction challenges and safety risks.
- This study analyzed the mechanical properties of phyllite through triaxial compression tests, focusing on factors like confining pressure, water content, and bedding angle to understand how these elements influence its behavior.
- Results show that as confining pressure increases, both peak strength and elastic modulus of phyllite improve significantly, with dry conditions generally resulting in stronger performance than saturated conditions, leading to complex failure modes including slip shear and tension failure.
Want 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!