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Copyright of Revista de la Asociación Odontológica Argentina is the property of Asociacion Odontologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Tecno Lógicas is the property of Instituto Tecnologico Metropolitano and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article presents a clinical case on the use of a synthetic ligament for the resolution of chronic rupture of the Achilles tendon in a canine patient. It is an adult dog of large size with plantigrade support on the right hind leg. After performing a detailed physical examination and radiographs, the diagnosis of Achilles tendon rupture was reached. It was decided to perform a surgical treatment using a biocompatible synthetic ligament and an external fixation system to restore the functionality of the leg. [Extracted from the article]

Titanium (Ti) alloys are of great interest in biomedicine for their excellent mechanical properties, corrosion resistance, and biocompatibility. Ti-6Al-4V alloy is the most used in the bioengineering area for the manufacture of orthopedic implants, however, due the cytoxicity of V, and phosphorus deficiency in blood and bones produced by the combination of Al ions with the inorganic phosphorus, it might consider the material as biologically unsafe for long exposure times. Tantalum (Ta), on the other hand instead, is an alloying element with excellent properties since it has been reported that this element promotes bone regeneration, without harmful effects. This research focused was focused on the study of the behavior of morphological, chemical, and mechanical properties of Ti-6Al-4V alloy, with the addition of powder Ta, obtained from Cold Isostatic Pressure (CIP) chip shaping and powder metallurgy, which were later heat treated at 800 and 900°C for 1 hour. The samples were characterized by Optical Microscopy (OM), Scanning Electron Microscopy (SEM) with chemical analysis of X-ray dispersion (EDX), and Vickers microhardness (HV). Where it was obtained that the ideal composition for medical implants, according to the properties obtained, is up to 20%wt of Ta subjected to 900°C for 1 hour. [ABSTRACT FROM AUTHOR]

Copyright of Medicina (Buenos Aires) is the property of Medicina (Buenos Aires) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de la Asociación Odontológica Argentina is the property of Asociacion Odontologica Argentina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de la Academia Mexicana de Odontología Pediátrica (2594-1798) is the property of Academia Mexicana de Odontologia Pediatrica, A. C. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of CES Odontología is the property of Universidad CES and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The purpose of the work is to study the mechanical properties and compatibility of binary blends obtained from polyamide 6 and polyamide 11 with a polyesteramide derived from tartaric and succinic acids with an ester content of 10 %. We have tried to obtain a new material, combining the mechanical characteristics of commercial polyamides with the degradability of polyesteramide for use with biomedical purposes, in suture threads. The blends were prepared by melting and the compatibility was evaluated by optical microscopy. The mechanical properties of these systems were obtained by tensile tests. The mechanical characteristics of the obtained blends are diminished with respect to the average value of the components, which verifies the incompatibility observed by optical microscopy; this behavior corresponds to incompatible polymer systems, which limits its use for biomedical purposes. [ABSTRACT FROM AUTHOR]

Carcinoma-like skin cancer is the world's most frequently diagnosed pathology. Its conventional treatments are classified according to the type of skin cancer that the patient presents and its location, and include procedures such as excision with margins evaluation, radiotherapy, curettage and electro dissection, cryosurgery, surgery Mohs micrograph, photodynamic therapy, topical 5-fluorouracil, topical Imiquimod therapy and laser with carbon dioxide. Despite the range of therapeutic techniques available, these therapies are usually accompanied by side effects, which is why it is interesting to study new alternatives based on tissue engineering that can potentially increase the effectiveness of anticancer results and decrease the occurrence of adverse effects. Among the Nanomedicine techniques used in cancer, nanoparticles (NPs), which are biocompatible and have been shown to be effective in animal models against the death of cancer cells and the decrease of tumor size, since by strongly absorbing near-infrared radiation they act as sources of local hyperthermia. In order to increase the biological effects of NPs, biofunctionalization or surface activation may be used to ensure anchorage of surfactants, proteins and tissue factors required. In the present project silver nanoparticles obtained through the nucleation and reduction chemical method, in which several parameters were modified to standardize the size of the nanoparticles, a key point in the treatment of cancer, after synthesis method was made an additional process of biofunctionalisation by the polyethylene glycol (PEG) polymer to improve the anchoring and biocompatibility properties of the nanoparticles. For the characterization of the nanoparticles, we proceeded with scanning and transmission electron microscopy techniques, in addition to spectophometric UV-Vis and an assay to determine the viability and cytotoxicity of nanoparticles. It was concluded that with the implemented procedure could be synthesized and characterized nanoparticles for their potential use in the treatment of skin cancer. [ABSTRACT FROM AUTHOR]

Magnesium is a material that presents favorable properties for its selection as biomaterial; however, its application is restricted by the rapid corrosion. In this research was evaluated the surface modification of magnesium AZ31 by PEO and its effect on the protective and bioactive properties. The microstructure, phase composition and distribution of elements in the coating were characterized by SEM, XRD and EDX. Chemical stability, corrosion resistance, the bioactivity and electronic properties were evaluated using EIS and Mott-Schottky in simulated body fluid. The analysis of XRD and EDX indicated the presence of MgO, MgSiO4 in the coatings. The cross section analysis present a compact layer close to the substrate followed by an outer porous layer. EIS analysis showed that treatment increased the substrate protection in a simulated physiological medium. [ABSTRACT FROM AUTHOR]

Copyright of Nefrologia is the property of Revista Nefrologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nefrologia is the property of Revista Nefrologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The ternary systems [Si/Ti/Zr: 10/70/20] and [Si/Ti/Zr: 10/20/70] were synthesized via sol-gel and applied on 316L stainless steel substrates by dip-coating. In the coatings obtained, the corrosion response was evaluated in a simulated physiological solution using potentio-dynamic polarization curves. The cellular biocompatibility of osteoblasts was studied; Substrate-coating adhesion, and the surface topography and the roughness in the coatings. The results of this study allow establishing a high degree of anticorrosive effectiveness and good biocompatibility. Sol-gel uncoated coatings establish their potential as an anticorrosive barrier as a function of the ternary system applied to the 316L stainless steel substrate. [ABSTRACT FROM AUTHOR]

Copyright of Nefrologia is the property of Revista Nefrologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Fiber scaffolds have received increasing interest as promising biomaterials for potential application in the field of tissue regeneration. In this sense, we optimized the parameters for the synthesis of different concentrations (6, 7, and 10 %) of poly-lactic acid (PLA) scaffolds by air jet spinning technology (AJS). The PLA scaffolds were characterized by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) analysis. Our results by SEM micrographs showed that scaffolds have a fibrilar morphology with nanoscale diameter of fibers. Biocompatibility assay was observed through an in vitro experiment based on cell attachment, MTT and cell-material interaction assay when culturing bone marrow-derived mesenchymal stem cells onto the PLA spun membrane scaffolds. Our data indicate that fiber membrane of PLA scaffold increase the cellular response, are not cytotoxic when compared to thin films of PLA. Thus; the proposed synthesis method has potential for easy processing of spun fibrilar scaffolds with good biocompatibility and could be a promising economical biomaterial with future potential applications in tissue regeneration. [ABSTRACT FROM AUTHOR]

The effect of pH on corrosion behaviour in stainless steel 316 LVM and alloy Ti6Al4V was studied by various electrochemical techniques such as cyclic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The corrosion rate was calculated with Tafel extrapolations and the pitting corrosion was also analysed for each material in different conditions of concentration 3% of NaCl and range pH (4.5-6-7.5-10-12). The results exhibited that the conditions of pH 4,5 has negative effect in the corrosion rate for both materials compared with other pH. [ABSTRACT FROM AUTHOR]

The development of innovative materials for the manufacture of biodegradable bone implants is one of the most important research topics in the area of biomaterials. The materials, from which these implants are made, can be gradually dissolved, absorbed, consumed or excreted by the human body, eliminating the need for secondary surgical procedures for removal of the implant. Magnesium alloys appear as promissory materials to be used in orthopedic applications, considering its biocompatible potential. Nonetheless, due to its chemical properties, this material rapidly corrodes producing subcutaneous gas bubbles resulting in a variety of toxics corrosion products. In that sense the use of Mg and its alloys as biodegradable material in orthopedic applications is not completely establish. For this reason the purpose of this work is to determine the cytotoxic effects of the AZ31B alloy corrosion products using metal foam configuration made from such material and the evaluation of cell viability using MTT reduction salts method. The results show a significant cytotoxic effect of the biocorrosion products on CHO-K1 cells, which is directly related to the release of ions and consequent increase in pH in the culture medium. [ABSTRACT FROM AUTHOR]

Copyright of Revista ADM is the property of Asociacion Dental Mexicana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: It is necessary to develop bone grafts capable to regenerate critical size bone defects. Objective: To evaluate the biocompatibility in vivo of tricalcium phosphate with chitosan (TPC) in skin, muscle, and bone. Methods: 15 Wistar rats were assigned to groups A (skin), B (muscle), C, D, and E (bone). TPC was placed in each tissue. In groups C-E, critical size bone defect was grafted with TPC and collagen sponge was placed adjacent to test sites as a control. Animals from groups A and B were sacrificed after 20 days, while groups C-E at days 45, 60, and 80. Inflammatory response was evaluated in all tissues. To assess biocompatibility, the percentage of cells was evaluated as none (0 %), low (< 30 %), moderate (30-50 %), and high (>50 %). Results: There were no signals of ulceration or suppuration in skin, muscle, and bone. After 80 days, TPC was incorporated into a fibrotic structure and osseointegrated to native bone. Conclusion: TPC was biocompatible with skin, muscle, and bone. [ABSTRACT FROM AUTHOR]

This article aims to show how the bioglass has been important in the development of biomedical sciences from its applicability and versatility in its multiple uses. This review aims to show how through interdisciplinary research it has designed different processes for obtaining materials from bioactive glasses. First, we will discuss the importance of development of biomedical devices focused in bioglass as precursor material and its impact on society today. Subsequently, relevance and importance of the surface modification as mechanism to improve working conditions and functionality of biomedical devices the obtention of bioglass coatings by different methods will be discussed. Finally, the authors propose vacuum evaporation method as a possible technique for to obtaining bioglass coatings, as an alternative for the difficulties encountered by other deposition methods. [ABSTRACT FROM AUTHOR]

Copyright of IBEROAMERICANA. América Latina - España - Portugal is the property of Vervuert Verlag and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Médicas UIS is the property of Universidad Industrial de Santander and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sedum salvadorense is described from its native habitat and locality and photographs of live plants are presented for the first time, 90 years after the published discovery of collections by Paul C. Standley in the Apaneca, Ahuachapán (western El Salvador) in an expedition from January 1922. The absence of reports from either the original collection locality or anywhere else suggested that the species was extinct. We present two new collection localities, representing a rediscovery for the Flora of El Salvador. This species occurs in very specific habitats in undisturbed areas, and grows on cliff rocks. S. salvadorense is very rare and poorly studied from ecological, phenological and geological perspectives and represents the only species of the genus occurring in El Salvador. [ABSTRACT FROM AUTHOR]

Copyright of Revista ADM is the property of Asociacion Dental Mexicana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The purpose of this study was to determine if the addition of chloride of calcium (CaCl2) and clorhexidina (CHX) blended liquids with the MTA-Angelus® and cement white portland (CBP) they don't interfere negatively in the subcutaneous fabric of rats. 21 rats type Wistar were used (rattus novergicus) that were classified in three experimental groups and one control, to those that were implanted four tubes of padded dentina of MTA+CaCl2 MTA+CHX, CPB+CaCl2 and CPB+CHX. The animals were sacrificed to the seven, 15 and 30 days by overdose, obtaining intersects microscopic seriados of 5 μm, dyeing with hematoxilina and eosina. The statistical test of χ² of Pearson showed that among the experimental groups difference existed statistically significant in the linfocitos to the seven days, CGMi to the seven and 15 days, edema to the seven days, angioblastic fibroblast proliferation and on the seventh day, to what you concludes that the preservatives used in the experimental materials, not interfere with the biocompatibility, it is therefore possible to indicate them in clinical situations involving connective tissue. [ABSTRACT FROM AUTHOR]

Copyright of Biomedical Engineering Journal / Revista Ingeniería Biomédica is the property of Biomedical Engineering Journal / Revista Ingenieria Biomedica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Zeledonia is the property of Asociacion Ornitologica de Costa Rica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista ADM is the property of Asociacion Dental Mexicana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Visión Electrónica is the property of Fondo de Universidad Distrital Francisco Jose de Caldas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Bacterial cellulose is a polymer obtained by fermentation with microorganisms from Acetobacter, Rhizobium, Agrobacterium and Sarcina genera. Among them, Acetobacter xylinum is the most efficient specie. This polymer has the same chemical composition of plant cellulose, but its conformation and physicochemical properties are different, making it attractive for several applications, especially in the areas of food, separation processes, catalysis and health, due to its biocompatibility. However, the main problem is the production in mass that is constrained by low yield. It is therefore necessary to develop some alternatives. This paper presents a review about synthesis, production, properties and principal applications of bacterial cellulose, as well as some alternatives to reduce the difficulties for process scaling. [ABSTRACT FROM AUTHOR]

Fusarium mexicanum has been described as the causal agent of mango malformation in several producing areas in Mexico. Isolates of F. mexicanum obtained from mango trees with malformation disease in Jalisco were characterized according to vegetative compatibility groups (VCGs). Isolates were cultured on minimal medium - supplemented with potassium chlorate (KClO3), NO3-, and L-asparagine, to generate spontaneous nitrate nonutilizing (nit) mutants. Mutants are detected as mycelia sectors chlorate-resistant, which are not able to utilize nitrate as a nitrogen source due to mutations at loci associated with the nitrate-assimilation pathway. F. mexicanum isolates generated 239 chlorate-resistant sectors of mycelia, out of 62.3 % were nit mutants. Phenotypic characterization detected 36.91 % mutants nit1, 28.18 % mutants nit3, 19.46 % mutants NitM and 14.76 % mutants nnu. Compatibility pairing tests amongst the mutants detected two VCGs in isolates of F. mexicanum from Jalisco. Isolates in one VCG from Jalisco were compatible with isolates of a previously identified VCG of F. mexicanum from Michoacan. A total of three VCGs were detected in the central Pacific region of Mexico. [ABSTRACT FROM AUTHOR]

Copyright of Cirugía y Cirujanos is the property of Publicidad Permanyer SLU and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study presents the characterization of a dental implant alloy for abutments. It proposes a biocompatible material and high mechanical resistance as an alternative to Titanium alloys, lowering costs of raw materials and processing. Mechanical testing of the Ni-Cr-Mo alloy and subsequently perform simulations of its mechanical properties by means of finite element analysis. As a result is obtained that the material reduces its mechanical strength after the casting for electric induction molding process. The simulation model is valid to make analysis of resistance to this type of dental devices. [ABSTRACT FROM AUTHOR]

A new material was synthetized using the wet precipitation method to obtain an osseous insert that can be used in medical applications. A solution of CaCl2 198 mM and another one with 119 mM of (NH4)2HPO4 dissolved in distilled water were simultaneously prepared with the slowly and continuous addition of NH4OH dissolved in water . Finally, 3 ml of collagen was aggregated to the solution. The precipitated was washed out several times with distilled wáter, filtered and dried in an incubator at 40°C. The samples were characterized by X-ray diffraction, surface electronic microscopy, Fourier transformation based infrared spectroscopy. Three different cubes composites with the volume of 10 x 10 x 10 mm3 each one were prepared and implanted into the dtygre sacrum of a female dog to check the osseous integration and the biocompatibility of the new material. Histological and radiographic studies were developed showed the development of osseous callus and the consequent formation of new bone section. [ABSTRACT FROM AUTHOR]

El presente estudio in-vivo, fue realizado por medio de análisis histológicos; para evaluar la biocompatibilidad del Cemento Sellador EEndodóntico Sealapex, al entrar en contacto con tejido conjuntivo en ratones de laboratorio. Este tejido conjuntivo presenta una gran similitud con los tejidos periodontales de las piezas dentarias, es por ello que se seleccionaron ratones y de esa manera poseer una mejor información de cómo actúa el hidróxido de calcio (cemento Sealapex) dentro de los tejidos dentarios al realizar un tratamiento de conducto radicular . La muestra investigada fue de 5 ratones isogénicos de un mismo sexo; los cuáles por medio de una intervención quirúrgica se les implantó subcutáneamente en el tejido conjuntivo, un tubo de polietileno de 1cm de largo que contenía el Cemento a investigar . La muestra fue mantenida en cautiverio y sacrificada en controles de 3, 7, 14, 21 y 28 días. Los hallazgos fueron clasificados según el grado de inflamación, fibrosis y mineralización, que presentó el tejido conjuntivo frente al cemento sellador endodóntico Sealapex y demostró que el grado de compatibilidad del cemento sellador Sealapex fue aceptable en todos los casos evaluados. La fibrosis moderada adherida al tubo conteniendo el cemento, es indicativo de una buena tolerancia del tejido conjuntivo subcutáneo de ratones hacia el producto. De igual forma, posee la propiedad de inducir la formación de mineralizaciones, las cuales fueron detectadas sobre el tejido conjuntivo de los ratones de laboratorio. (Favoreciendo su pH alcalino que permite liberación de iones hidroxilo (OH-), a diferencia del pH ácido que aumentaría su inflamación y la falta de compatibilidad del cemento sellador con los tejidos periodontales). Por lo cual, se recomienda para casos de piezas tratadas endodónticamente con necrosis pulpar o en pulpas vitales [ABSTRACT FROM AUTHOR]

Background: the 2 octilcianoacrilate (2OCA) is a liquid monomer that polymerizes on contact with the surface by an exothermic reaction creating a strong and flexible film. Multiple studies have recently demonstrated that wound closure with 2OCA is compared with other methods of closure, offering additional benefits such as tensile strength and compression-resistant joints, highly polymerized fast, also acts as a barrier to microorganisms. The aim was to use the combination of 2OCA and sodium bicarbonate in the treatment of zygornatic arch fractures in an animal model and to evaluate the biocompatibility and bone healing. Methods: twenty animals subjected to bilateral zygomatic arch fracture under surgical sedation, and using 2OCA fixation and sodium bicarbonate experimental side and control side floating, watching over a period from two to four weeks, assessing biocompatibility stability and consolidation. Results: at the end of two and four weeks, the twenty animals showed the presence of osseous callous and continuity of marrow channel measured by macroscopic and radiography examinations. Conclusions: the use of 2-Octilcianoacrilate and sodium bicarbonate led the stabilization and reduction of bilateral zygomatic arch fractures in an animal model without adverse reactions. [ABSTRACT FROM AUTHOR]

Introduction: pulpotomy in primary teeth is one of the most controversial treatments in pedodontics due to the fact that the biocompatibility of the material used in contact with the pulp tissue can make the difference between success and failure. Formocresol is the most used medication in a pulpotomy; however due to the concern about the toxicity and carcinogenicity of the formocresol, other alternatives such as the mineral trioxide aggregate have been proposed. Objective: to evaluate clinical and radiographic pulpotomy success with MTA in 58 primary molars. Material and methods: sampling consisted of 37 patients, ranging from 4 to 8 years old; 58 molars were obtained. Inclusion criteria consisted of dental organs affected by cameral pulp, with 2/3 of root length and that they could be restored with stainless steel crowns. Once the procedure was done, the patients were evaluated during 48 months. The statistical analysis was done with PASW Statistic version 18.0. Results: clinical and radiographic success was 96.4%. Pulpar response of the dental organs to which the pulpotomy with the mineral trioxide aggregate was performed, was favorable during the evaluated periods. Conclusion: MTA is an alternative part of the pulpotomy of primary molars; after exfoliation of some of thepulpotomized teeth, none of the observed successors presented structure alteration. [ABSTRACT FROM AUTHOR]

Copyright of Revista Española de Cirugía Oral y Maxilofacial is the property of Sociedad Espanola de Cirugia Oral y Maxilofacial (SECOM) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales is the property of Academia Colombiana de Ciencias Exactas, Fisicas y Naturales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objetive. To determine the effects of dietary alatoxins (AF) on chinchillas (Chinchilla lanigera). Materials and methods. A total of 20 male chinchillas were distributed in 5 experimental groups of 4 animals each. Animals received the following levels of dietary AF: 0, 25, 50, 100 and 200 ppb (ng/g) for 8 weeks. Feed intake, individual body weight and mortality were recorded weekly. In addition, the in vitro hepatic metabolism of alatoxin B1 (AFB1) was investigated using liver samples from the control group. Results. Exposure to AF did not cause any effect on feed intake or mortality. The only parameter affected significantly (p<0.05) was body weight when 200 ppb AF were added to the diet. Both AF levels of 100 and 200 ppb produced mild to moderate liver changes. Microsomal metabolism of AFB1 showed production of AFB1 epoxide as the only biotransformation product. Conclusions. Results demonstrated that chinchillas were highly resistant to AF and were capable of tolerating for at least two months dietary alatoxin levels that would be lethal, in just a few days, to sensitive species such as pigs or dogs, in just a few days. [ABSTRACT FROM AUTHOR]

Objective. The objective of the present study was to compare some physiological responses to heat and atmospheric humidity among Chinampos (Bos Taurus; Ch), ½ Charolais ½ Brahman (CB), Holstein (H) and Jersey (J) cattle. Materials and methods. The study was carried out in La Paz, Mexico; 12 H, 10 J, 15 Ch and 8 CB cows were used. During the summer the respiratory frequency (RF) and rectal temperature (RT) were measured each week (at 0600 and 1600 hours). The climatic variables were measured to calculate the temperature-humidity index (THI). Results. Throughout the summer , the RF was above the physiological values of cattle in the four groups, being higher in H and J than in Ch and CB (p<0.01). In all groups, the RT was within the physiological limits of cattle. The most affected group was H (p<0.05). When the physiological constants were analyzed within each of the three categories of THI (<72, =72<78, and =78), the H and J cows presented higher RF than that of Ch and CB (p<0.01). The RT increased as the THI rose, being more pronounced in J and H. Increase in the RF between the morning and the afternoon of each day of measurement was higher in H and J than in Ch and CB (p<0.05). The RT increased more in H than in Ch (p<0.05). Conclusions. The breed groups most tolerant to heat stress, based on RF and RT, were Ch and CB. [ABSTRACT FROM AUTHOR]

Copyright of Superficies y Vacío is the property of Sociedad Mexicana de Ciencia y Tecnologia de Superficies y Materiales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Superficies y Vacío is the property of Sociedad Mexicana de Ciencia y Tecnologia de Superficies y Materiales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of CES Odontología is the property of Universidad CES and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The purpose of this work is to prove that CP titanium implants (Ti CP) can be coated with diamond-like carbon films (DLC) to produce a material of better biocompatibility. To coat the Ti CP plates used in osteosynthesis a hot filament CVD HFCVD system was employed, by mixing hydrogen and methane in a 200 to 0.9 sccm proportion, at substrate temperature of 880°C and filament temperature of 2200°C. The examination of the coatings by SEM shows the cauliflower-shaped dendritic growth common to the formation of diamond-like carbon films. The analysis of the films by XPS was done with an ESCALAB 250 Thermo VG Scientific, equipped with an Ar+ argon ion beam to draw the elemental composition profile in relation to depth. The XPS analysis evidences that the chemical structure and the composition of the interface correspond to Ti-DLC compounds. The activity of the C1s line registered on the surface and in the depth after 7-hour of erosion of the coating evidences strong changes in the proportion of C-C bonds at 284.8 eV and TiC bonds at 281.7 eV. [ABSTRACT FROM AUTHOR]

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