scholarly journals A novel sol-gel-derived calcium silicate cement with short setting time for application in endodontic repair of perforations

2018 ◽  
Vol Volume 13 ◽  
pp. 261-271 ◽  
Author(s):  
Bor-Shiunn Lee ◽  
Hong-Ping Lin ◽  
Jerry Chun Chung Chan ◽  
Wei-Chuan Wang ◽  
Ping-Hsuan Hung ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Setting Time ◽  
Sol Gel ◽  
Calcium Silicate Cement ◽  
Short Setting Time

scholarly journals Physicochemical and Biological Properties of Mg-Doped Calcium Silicate Endodontic Cement

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1843
Author(s):  
Kyung-Hyeon Yoo ◽  
Yong-Il Kim ◽  
Seog-Young Yoon
Keyword(s):  
Mechanical Properties ◽  
Calcium Silicate ◽  
Setting Time ◽  
Sol Gel ◽  
Biological Properties ◽  
Hydration Properties ◽  
Calcium Silicate Cement ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Physicochemical And Biological Properties ◽  
Mg Doped

Calcium silicate-based cement has been widely used for endodontic repair. However, it has a long setting time and needs to shorten setting time. This study investigated the effects of magnesium (Mg) ion on the setting reaction, mechanical properties, and biological properties of calcium silicate cement (CSC). Sol-gel route was used to synthesize Mg ion-doped calcium silicate cement. Synthesized cement was formulated with the addition of different contents of Mg ion, according to 0, 1, 3, 5 mol% of Mg ion-doped calcium silicate. The synthesized cements were characterized with X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). We also evaluated the physicochemical and biological properties of cement, such as the setting time, compressive strength, micro-hardness, simulated body fluid (SBF) immersion, cytotoxicity, and cell differentiation tests. As a result, the Mg ion improves the hydration properties of calcium silicate cement, and the setting time is reduced by increasing the amounts of Mg ion. However, the mechanical properties deteriorated with increasing Mg ion, and 1 and 3 mol% Mg-doped calcium silicate had appropriate mechanical properties. Also, the results of biological properties such as cytotoxicity, ALP activity, and ARS staining improved with Mg ion. Consequently, the optimal condition is 3 mol% of Mg ion-doped calcium silicate (3%Mg-CSC).

Novel Fluoride-doped Calcium-silicate cement for dental applications. The effect of Bi2O3 and BaSO4 radiopacifier agents on setting time

2010 ◽  
Vol 150 ◽  
pp. 465-465
Author(s):  
Maria Giovanna Gandolfi ◽  
Andrea Colin ◽  
Giovanni Luca Acquaviva ◽  
Stefano Chersoni ◽  
Fabio Fava ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Setting Time ◽  
Calcium Silicate Cement ◽  
Dental Applications

scholarly journals Development of resin-based bioactive endodontic cements with glycerol salicylate and calcium silicate

2020 ◽  
Vol 61 (1) ◽  
pp. 69-76
Author(s):  
Rafaela Cassaro Pistorello ◽  
Gabriela De Souza Balbinot ◽  
Vicente Castelo Branco Leitune ◽  
Fabricio Mezzomo Collares
Keyword(s):  
Calcium Silicate ◽  
Methyl Salicylate ◽  
Setting Time ◽  
Sol Gel ◽  
Chemical Properties ◽  
Distilled Water ◽  
Physical Chemical ◽  
Time Flow

Introduction: The combination of sol-gel derived calcium silicate particles and glycerol salicylate resins may enhance the pyhisico-chemical properties contribute to the understanding of the interaction between these materials. This study aims to evaluate the physical-chemical properties of resin-based bioactive endodontic cements with glycerol salicylate resins and calcium silicate particles. Materials and methods: Calcium silicate was produced by the sol-gel route, while the resin was produced by mixing 60wt% glycerol salicylate, 30wt% methyl salicylate and 10wt% distilled water. Calcium silicate was added in three different concentrations, 50, 40 and 25% by weight. The cement was tested for setting time, flow, radiopacity and pH. Results: The 50:50 group shows the time of 15min8s while the 75:25 shows the time of 256min13s (p

scholarly journals Highly active calcium-silicate phases for application in endodontics

2013 ◽  
Vol 60 (4) ◽  
pp. 210-217 ◽  
Author(s):  
Vukoman Jokanovic ◽  
Bozana Colovic ◽  
Dejan Markovic ◽  
Slavoljub Zivkovic
Keyword(s):  
Calcium Silicate ◽  
Setting Time ◽  
Sol Gel ◽  
Mineral Trioxide Aggregate ◽  
Phase Changes ◽  
Highly Active ◽  
Propagating Waves ◽  
Before And After ◽  
New Material ◽  
Xrd Patterns

Introduction. Mineral trioxide aggregate (MTA) is one of the most commonly used materials in endodontics. Given its shortcomings, there is an intensive search for new materials. Calcium-silicate phase (CS phase) is a new material synthesized by the method based on a combination of sol-gel process and self-propagation synthesis which can significantly improve setting time through accelerated hydration. The aim of this study was to explain the mechanisms of hardening of CS phase in aqueous medium as similar mechanism is expected in contact with body fluids. Materials and Methods. CS phases Ca3SiO5 (C3S) and 2?-CaSiO4 (?-C2S) were synthesized from CaCl2?5H2O (Merck, Germany). To investigate the process of hydration, CS were mixed with water and kept at 37 ?C for 28 days in closed polyethylene containers. Analysis of the composition of samples before and after immersion in water for 1, 3, 7 and 28 days was performed using X - ray diffractometry and IR. Results. XRD patterns for hydrated samples during 1, 3, 7 and 28 days showed that the amount of hydrated tobermorite phases relative to the amount of CS phase changes with the time of hydration. After 1 day, in addition to the hydrated phases, a significant amount of untransformed ?-C2S and C3S were found while after 28 days hydrated CS phase was completely transformed to tobermorite with a small amount of portlandite. Conclusion. Using combined method of sol-gel and self-propagating waves at high temperature very active nanostructured silicate phases were obtained. Hydration process of CS phases was analyzed using XRD and FTIR, the mechanism of hydration was proposed and it was pointed to the difficulties in determining the exact reaction as well as the problem of determining the exact structure of tobermorite.

scholarly journals A influência do tamanho de partícula na reação de presa de cimentos de silicate de cálcio produzidos por sol-gel

2021 ◽  
Vol 62 (1) ◽  
pp. 63-70
Author(s):  
Fabio De Cesare ◽  
Gabriela De Souza Balbinot ◽  
Vicente Castelo Branco Leitune ◽  
Fabrício Mezzomo Collares
Keyword(s):  
Particle Size ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Calcium Silicate ◽  
Setting Time ◽  
Sol Gel ◽  
Nitrogen Adsorption ◽  
Setting Reaction ◽  
Fourier Transformed Infrared Spectroscopy

Introduction: This study aims to analyze the influence of particles size of sol-gel derived calcium silicate particles in the setting reaction of bioactive endodontic cements. Materials and Methods: Sol-gel derived calcium silicate particles were synthesized and sieved to separate the particles in different sizes: CS400, CS200, and CS100. A commercial MTA (Control) was used as control. The particle size and the specific surface area were assessed by laser diffraction and nitrogen adsorption. The cements were prepared with water as the liquid for the reaction. The setting time was conducted according to ISO 6876, and the setting kinetics was analyzed by Fourier transformed infrared spectroscopy (FTIR) at different time points between 120s to 72h. Results: The particle size varied from 9.45µm (CS400 ) to 31.01 (Control). The higher specific surface area valuer reached 15.14g/cm2 in the CS400. The smallest particle sizes, the higher specific surface area, and the lowest setting time were found for CS400 (p < 0.05). Control presented the highest setting time (p < 0.05). The FTIR analyses showed the differences in materials structure over time, with faster hydration and crystallization for CS400. The setting kinetics was slower for Control even when compared to a sol-gel derived group with similar particle size. Conclusion: The route of synthesis and the particle size influences the setting reaction of calcium silicate-based cements. The reduction of particle size for sol-gel derived calcium silicates lead to the acceleration of the setting reaction of the produced bioactive endodontic cement.

In Vitro Mechanical Properties of a Calcium Silicate Based Bone Void Filler

2006 ◽  
Vol 309-311 ◽  
pp. 829-832 ◽  
Author(s):  
Hakan Engqvist ◽  
S. Edlund ◽  
Gunilla Gómez-Ortega ◽  
Jesper Lööf ◽  
Leif Hermansson
Keyword(s):  
Calcium Phosphate ◽  
Flexural Strength ◽  
Calcium Phosphate Cement ◽  
Calcium Silicate ◽  
Setting Time ◽  
High Strength ◽  
Calcium Silicate Cement ◽  
Bone Void Filler ◽  
Bone Void

The objective of the paper is to investigate the mechanical and the handling properties of a novel injectable bone void filler based on calcium silicate. The orthopaedic cement based on calcium silicate was compared to a calcium phosphate cement, Norian SRS from Syntes Stratec, with regard to the working (ejection through 14 G needle) and setting time (Gillmore needles), Young’s modulus and the flexural (ASTM F-394) and compressive (ISO 9917) strength after storage in phosphate buffer saline at body temperature for time points from 1h up to 16 weeks. The calcium silicate cement is composed of a calcium silicate powder (grain size below 20 µm) that is mixed with a liquid (water and CaCl2) into a paste using a spatula and a mixing cup. The water to cement ratio used was about 0.5. The calcium silicate had a working time of 15 minutes and a setting time of 17 minutes compared to 5 and 10 minutes respectively for the calcium phosphate cement. The compressive strength was considerably higher for the calcium silicate cement (>100 MPa) compared to the calcium phosphate cement (>40 MPa). Regarding the flexural strength the calcium silicate cement had high values for up to 1 week (> 40 MPa) but it decreased to 25 MPa after 16 weeks. The phosphate cement had a constant flexural strength of about 25 MPa. The results show that calcium silicate cement has the mechanical and handling potential to be used as high strength bone void filler.

scholarly journals Creating of highly active calcium-silicate phases for application in endodontics

2013 ◽  
Vol 45 (3) ◽  
pp. 341-350 ◽  
Author(s):  
B. Colovic ◽  
V. Jokanovic ◽  
N. Jovic
Keyword(s):  
Mechanical Properties ◽  
Calcium Silicate ◽  
Setting Time ◽  
Sol Gel ◽  
Morphological Characteristics ◽  
Phase Changes ◽  
Wave Method ◽  
Highly Active ◽  
Active Calcium ◽  
The Given

The synthesis of active silicate phases by combined sol gel and high-temperature selfpropagating wave method, is described in this paper. They show a significant decrease of setting time and good mechanical properties, which are very important for its potential application in endodontic practice. Particularly, process of hydration of calcium silicate phases is carefully analyzed, from the aspect of phase changes during their soaking in water for 1, 3, 7 and 28 days. XRD and FTIR methods were used for phase analysis of all samples, while morphological characteristics and chemical composition of the given phases were investigated by SEM and EDS.

A novel, doped calcium silicate bioceramic synthesized by sol–gel method: Investigation of setting time and biological properties

2019 ◽  
Vol 108 (1) ◽  
pp. 56-66 ◽  
Author(s):  
Mohamed Mahmoud Abdalla ◽  
Christie Ying Kei Lung ◽  
Prasanna Neelakantan ◽  
Jukka Pekka Matinlinna
Keyword(s):  
Calcium Silicate ◽  
Setting Time ◽  
Sol Gel ◽  
Biological Properties ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Physico-Chemical Investigation of Endodontic Sealers Exposed to Simulated Intracanal Heat Application: Hydraulic Calcium Silicate-Based Sealers

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 728
Author(s):  
David Donnermeyer ◽  
Magdalena Ibing ◽  
Sebastian Bürklein ◽  
Iris Weber ◽  
Maximilian P. Reitze ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Thermal Treatment ◽  
Film Thickness ◽  
Physical Properties ◽  
Calcium Silicate ◽  
Setting Time ◽  
Chemical Properties ◽  
Chemical Changes ◽  
Time Flow ◽  
Heat Application

The aim of this study was to gain information about the effect of thermal treatment of calcium silicate-based sealers. BioRoot RCS (BR), Total Fill BC Sealer (TFBC), and Total Fill BC Sealer HiFlow (TFHF) were exposed to thermal treatment at 37 °C, 47 °C, 57 °C, 67 °C, 77 °C, 87 °C and 97 °C for 30 s. Heat treatment at 97 °C was performed for 60 and 180 s to simulate inappropriate application of warm obturation techniques. Thereafter, specimens were cooled to 37 °C and physical properties (setting time/flow/film thickness according to ISO 6876) were evaluated. Chemical properties (Fourier-transform infrared spectroscopy) were assessed after incubation of the specimens in an incubator at 37 °C and 100% humidity for 8 weeks. Statistical analysis of physical properties was performed using the Kruskal-Wallis-Test (P = 0.05). The setting time, flow, and film thickness of TFBC and TFHF were not relevantly influenced by thermal treatment. Setting time of BR decreased slightly when temperature of heat application increased from 37 °C to 77 °C (P < 0.05). Further heat treatment of BR above 77 °C led to an immediate setting. FT-IR spectroscopy did not reveal any chemical changes for either sealers. Thermal treatment did not lead to any substantial chemical changes at all temperature levels, while physical properties of BR were compromised by heating. TFBC and TFHF can be considered suitable for warm obturation techniques.

THE EFFECT OF COMPOSITION CHANGE IN SOL-GEL SYNTHESIZED PSC

2008 ◽  
Vol 20 (01) ◽  
pp. 53-59
Author(s):  
Wen-Hsi Wang ◽  
Yuan-Ling Lee ◽  
Chun-Pin Lin ◽  
Feng-Huei Lin
Keyword(s):  
Setting Time ◽  
Sol Gel ◽  
Hydration Product ◽  
Xrd Pattern ◽  
Ph Variation ◽  
Initial Strength ◽  
Filling Materials ◽  
Retrograde Filling ◽  
Significant Difference ◽  
Sol Gel Process

Modified calcium silicate cement had previously been developed as a dental retrograde filling. It had great sealing ability, good biocompatibility, and anti-bacterial properties. However, its clinical application was limited by a long setting time and poor handling property. In previous study,1, 2 the setting property of PSC was greatly improved due the sol-gel process, without the addition of transition metal element. In this study, different ratio of starting material of PSC was prepared. The composition of each group was also altered with the ratio of the starting materials according to the result of XRD pattern. There is no significant difference in pH variation profile between each group. Even though low C 3 S / C 4 AF ratio (DX631 and DX541 groups) possessed high initial strength at first 24 hours after hydration, there was no increase in strength ever since according to the result of microhardness. However, the groups with high C 3 S / C 4 AF ratio (DX811 and DX721 groups) possessed relatively low initial strength at 24 hours after hydration, but the strength increased rapidly and continuously at least for the next six days of hydration. Moreover, the peak intensity of hydration product (Portlandite) on XRD pattern in DX811 group was much higher than other three groups, and this was also in agreement with the result of microhardness. DX811 group is determined to be the optimal one for the further development in the application as root-end filling materials.

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