Facultad de Medicina SX /S X Cytotoxicity of Dental Alginates Citotoxicidad de Alginatos Dentales. The aim of this study was to assess the cytotoxicity of alginates for dental applications. Fourteen different alginates were assessed: Jeltrate, Jeltrate Plus, Jeltrate. Actuamos sólo en el sector mayorista y principalmente en el ramo dental ; para lo cual disponemos de los registros e inscripciones necesarios que son.
|Published (Last):||14 April 2017|
|PDF File Size:||5.29 Mb|
|ePub File Size:||11.8 Mb|
|Price:||Free* [*Free Regsitration Required]|
The influence of culture conditions on mycelial structure and cellulase production by Trichoderma reesei Rut C Therefore, the present work aimed at assessing the cytotoxicity of dental alginates in cell cultures.
In fact, this reaction should occur in the mouth, and it is therefore necessary to slow down the reaction with trisodium phosphate, while the dental material is mixing with water. The samples were kept in contact with culture medium during this 2-minute period, and the supernatants were then put in contact with the cells. Also, it could be improved by combining the use of modifiers such as magnesium oxide, potassium sulfate, sodium silicoflouride and other types of diatomaceous earths.
The culture medium was replaced with fresh medium every 24 hours, and the supernatants were collected after 24, 48, 72, and hours 7 days for analysis of the toxicity to L cells. Moisture content of the alginate powders. Determination of compressive strength. The dental impression formulations produced experimentally using the P1, P2 and P3 potassium alginates and the S3 sodium alginate formed gels. The exact proportions of the formula vary accordingly to the type of alginate used.
However, many substances such as zinc, barium, cadmium, lead silicates, and fluorides are added to their formulations in order to improve the physical, chemical, and mechanical properties, being a cause of concern in terms of toxicity de Freitas, Alginate, or irreversible hydrocolloid, is one of the most accepted impression materials used in dentistry.
Although the gels did not show a linear viscoelastic behavior, the relation was similar for all cases and the breakdown of the elastic structure occurred at about the same strain percent.
Three control groups were also used in this study: The use of alginates in dental impression materials is based on the aqueous reaction between a sparingly soluble calcium salt usually calcium sulfate dihydrate and an alginate.
The gelling process takes place in the mouth and, after a few minutes, the impression is removed.
After adequate homogenization, the alginate was inserted into silicon rings 4 mm diameter x 4 mm height until full gelification Fig. Formulations using the P1 alginate were type II, except for a10 that was type I. Production, properties, alginatoe uses of alginates. They are also used in dental prostheses, as models for studying jagged and toothless mouth impressions Skinner and Phillips, ; Osborne et al. Quantitative analysis of potentially toxic metals in alginates for dental use.
Trisodium phosphate is a retardant, while calcium sulfate is the reactant used to promote gel formation. Formulations with P2 alginate were type I, except for a6 that was type II. Sodium and potassium alginates extracted from Macrocystis pyrifera algae for use in dental impression materials.
Pilot plant scale extraction of alginate from Macrocystis pyrifera. JiangKamran E. A total of 60 experimental formulations were prepared. That is, this substance may not be toxic enough to kill the cells but can inhibit cell growth, affecting at least the normal cell function. Amongst these metals, one can cite the lead, which is present in the alginate powders to improve their elastic properties following gelification despite sometimes being found as an impurity Braga et al.
The aim of this study was to assess the cytotoxicity of alginates for dental applications. Therefore, repeated impression procedures might cause a certain degree of cytotoxicity to the patient depending on the material composition Braga et al. Assessing the Cytotoxity of the Materials.
Cytotoxic effect of saffron stigma aqueous extract on human transitional cell carcinoma and mouse fibroblast. Alginates with high content of guluronic acids characteristically yield materials with high gel strength.
Dentists use them in powder form together with other components to prepare the material with the appropriate viscosity, which is transported to the patient’s mouth by means of an impression tray.
SafaviQiang Zhu Oral surgery, oral medicine, oral pathology, oral…. This formulation was the closest to the compressive strength specified by the Dental American Association g cm -2 for dental impression alginates Skinner and Phillips, The aim of this study was to assess the cytotoxicity of alginates for dental applications.
Citotoxicidad de Alginatos Dentales
After this period, the cells were fixed using ? As expected, a low cytotoxicity was observed and no statistical difference found. Fourteen different alginates were assessed: Determination of gelling time Seven grams of each dental impression formulation table 1 were mixed with 18 mL of distilled water for 1 min.
One of the quality characteristics of the alginates is their calcium content. The effect of pre-extraction treatments on the yield and quality denales alginate. Formulations with P3 alginate were edntales I, except for a8 and a10 that were type II. The results obtained showed that all alginate materials are cytotoxicity compared to the control groups CC algintaos C.
No significant differences were obtained between the experimental formulations. Efforts are being made to develop an alginate production industry in Mexico based on the rational alginatis efficient exploitation of M. However, at larger strains value, Tan 8 increased for all formulations, suggesting that as the partial breakdown of the elastic structure proceeds with increasing strain, a change to a relatively more viscous behavior of the formulations takes place.
Cytotoxicity of impression materials. In algintaos case, the most important factor to increase the compressive strength of the dental impression material formulated was the polymerization degree; however, it could be improved if the alginate viscosity is increased to values of mPa s.
In all cases, the gels did not exhibit linear viscoelastic behavior and as the strain percent increased, a partial breakdown of the elastic structure occurred.