Influence of Different Base Thicknesses on Maxillary Complete Denture Processing: Linear and Angular Graphic Analysis on the Movement of Artificial Teeth

Objective: The purpose of this study was to compare the dental movement that occurs during the processing of maxillary complete dentures with 3 different base thicknesses, using 2 investment methods, and microwave polymerization.Methods: A sample of 42 denture models was randomly divided into 6 groups (n = 7), with base thicknesses of 1.25, 2.50, and 3.75 mm and gypsum or silicone flask investment. Points were demarcated on the distal surface of the second molars and on the back of the gypsum cast at the alveolar ridge level to allow linear and angular measurement using AutoCAD software. The data were subjected to analysis of variance with double factor, Tukey test and Fisher (post hoc).Results: Angular analysis of the varying methods and their interactions generated a statistical difference (P = 0.023) when the magnitudes of molar inclination were compared. Tooth movement was greater for thin-based prostheses, 1.25 mm (-0.234), versus thick 3.75 mm (0.2395), with antagonistic behavior. Prosthesis investment with silicone (0.053) showed greater vertical change compared with the gypsum investment (0.032). There was a difference between the point of analysis, demonstrating that the changes were not symmetric.Conclusions: All groups evaluated showed change in the position of artificial teeth after processing. The complete denture with a thin base (1.25 mm) and silicone investment showed the worst results, whereas intermediate thickness (2.50 mm) was demonstrated to be ideal for the denture base.

Enterorrafias em plano aposicional convencionale com adesivo �� base de cianoacrilato no c��lon descendente de eq��inos

Em eq��inos, as enterotomias no c��lon descendente s��o necess��rias para remover enter��litos, corpos estranhos e material alimentar compactado que n��o podem ser removidos por t��cnicas conservativas. Este segmento intestinal possui um suprimento sang����neo pobre, al��m de predisposi����o a complica����es p��s-operat��rias relacionadas �� contamina����o bacteriana. Assim, este estudo foi conduzido com o objetivo de efetuar avalia����es cl��nicas e anatomopatol��gicas do emprego de adesivo tecidual �� base de cianoacrilato no c��lon descendente de eq��inos, comparando-o a uma t��cnica de sutura aposicional convencional. A interven����o cir��rgica foi realizada em 15 animais posicionados em dec��bito lateral direito, atrav��s de laparotomia pelo flanco esquerdo, sob anestesia geral inalat��ria. Ap��s a exterioriza����o do c��lon descendente, foram realizadas duas enterotomias de cinco cent��metros de extens��o cada, distanciadas 20cm uma da outra. Os animais foram aleatoriamente distribu��dos em cinco tempos de observa����o de tr��s animais cada e sacrificados aos tr��s, sete, 14, 35 e 70 dias de p��s-operat��rio. O adesivo butil-2-cianoacrilato e o fio de poliglactina 910 mostraram-se igualmente apropriados para uso em enterorrafias desse ��rg��o, sendo que o fio de poliglactina 910 provocou inflama����o inicial mais intensa que o cianoacrilato e, mais tardiamente, ambos causaram inflama����o granulomatosa do tipo corpo estranho observada, primeiramente, junto ao fio de poliglactina 910 (7�� dia) e, a partir do 35�� dia, ao redor do cianoacrilato.

Effect of different repair techniques on the accuracy of repositioning the fractured denture base

Objective:This study investigated the efficacy of different techniques for the union of fragments of a denture before repair and on the accuracy of the reposition.Materials and methods:For this study, 20 maxillary dentures made with Lucitone 550 heat-cured resin were used. Points were determined with a scanner on the cusp of the teeth, as a measurement of the segments. After digitisation, each model was exported to the AUTOCAD R 14 program and two-dimensional measurements of the distances between the marked points were made. After the initial analysis, the dentures were fractured into two segments using an impact test machine. For the repair, maxillary dentures were divided into two groups; in the first, the repair was carried out using Kerr's sticky wax and in the second group, Super Bonder was used to join the fragments, with subsequent inclusion of DENTSPLY((R)) Repair Material resin. After the repair, the points of the maxillary dentures were measured again. The numerical values obtained were tabulated to compare the measurements before fracture and after the repair. For statistical analysis, analysis of variance was employed, using a single factor and double factor, followed by the Tukey test with a reliability of 95%.Results:The results demonstrated a statistically significant difference between the materials used to join the dentures for repair, where the dentures were joined with sticky wax presented a larger variation in the distances between the points.Conclusion:The variation in distances between the points is influenced by the agent of repair.

Silver Distribution and Release from an Antimicrobial Denture Base Resin Containing Silver Colloidal Nanoparticles

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Reliability of a method for evaluating porosity in denture base resins

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Complete Assignments of ��H and 13C-NMR Spectra of the 3,4-seco-Triterpene Canaric Acid isolated from Rudgea jasminoides

O ��cido can��rico 1 foi isolado das folhas de Rudgea jasminoides. A subst��ncia isolada �� um derivado triterp��nico do tipo seco-lupano e teve sua estrutura elucidada com base nos dados espectrais, principalmente em experimentos de RMN a 1D e 2D. O sitosterol, o estigmasterol e os ��cidos urs��lico e olean��lico tamb��m foram isolados.

Consumo de nutrientes e desempenho de ovinos alimentados com dietas �� base de cana-de-a����car hidrolisada

O objetivo deste trabalho foi avaliar o consumo de nutrientes e o desempenho de ovinos alimentados com dietas �� base de cana-de-a����car in natura ou hidrolisada. Foram avaliados 18 ovinos, com aproximadamente 22��2,4 kg de peso vivo, distribu��dos em delineamento de blocos ao acaso, com 6 repeti����es, e o peso dos animais foi utilizado como crit��rio para sua distribui����o nos blocos. Os animais receberam dietas completas com 50% de volumoso (cana-de-a����car in natura, tratada com 0,5 e com 0,9% de cal), e 50% de concentrado. As dietas foram formuladas de forma a atender ��s exig��ncias de manuten����o dos animais e os ganhos de 150 g por dia. As vari��veis foram: o consumo e a digestibilidade dos nutrientes e o ganho em peso dos animais. A adi����o do hidr��xido de c��lcio aumentou a digestibilidade da fibra em detergente neutro. N��o foi observada altera����o no consumo de nutrientes ou melhora no ganho em peso dos animais alimentados com cana-de-a����car, tratada com hidr��xido de c��lcio, a 0,5 e 0,9%, em compara����o �� cana-de-a����car in natura. A cana-de-a����car com adi����o hidr��xido de c��lcio pode ser fornecida ap��s 24 horas de armazenamento, sem preju��zo do desempenho dos animais.

Diverg��ncia gen��tica entre acessos de Passiflora cincinnata mast com base em descritores morfoagron��micos

Este trabalho teve como finalidade estimar a diverg��ncia gen��tica entre acessos de maracujazeiro (Passiflora cincinnata Mast.) conservados na cole����o de trabalho da Empresa Brasileira de Pesquisa Agropecu��ria (EMBRAPA) Semi-��rido, em Petrolina-PE. O experimento foi conduzido em delineamento de blocos ao acaso, com quatro repeti����es. A avalia����o foi realizada em 32 acessos, com base em 23 caracteres: dois relativos �� planta, tr��s ��s folhas, seis ��s flores, quatro aos frutos, quatro ��s sementes, dois ��s caracter��sticas qu��micas dos frutos e dois �� produ����o. O comportamento dos acessos foi pesquisado pelas an��lises univariada e multivariada, com estimativas das dissimilaridades obtidas pela dist��ncia generalizada de Mahalanobis (D��) e forma����o do agrupamento pelo m��todo de Tocher. Os acessos apresentaram variabilidade gen��tica para todos os descritores utilizados na avalia����o. As dist��ncias gen��ticas entre pares de acessos variaram de 17 a 598, com m��dia 152. O acesso 18-D0542 foi indicado como o mais divergente e o mais produtivo, devendo compor programas de intercruzamentos e ser recomendado para cultivos experimentais por produtores. As caracter��sticas de maior import��ncia para a diverg��ncia gen��tica foram: a massa total dos frutos (42,29%), a viabilidade de p��len (8,62%) e a ��rea foliar (7,16%). O agrupamento dos acessos n��o se correlaciona ��s Unidades Geoambientais originais de coleta.

Consumo, digestibilidade e desempenho de novilhos alimentados com ra����es �� base de feno de capim-tifton 85, em diferentes idades de rebrota

Objetivou-se avaliar o consumo e as digestibilidades aparentes de mat��ria seca (MS), prote��na bruta (PB), extrato et��reo (EE), carboidratos totais (CT) e fibra em detergente neutro (FDN), o ganho de peso e a convers��o alimentar em bovinos Nelore, recebendo ra����es contendo feno de capim-tifton 85 com 35, 42 e 56 dias de rebrota. Foram utilizados 18 novilhos, n��o-castrados, com peso vivo m��dio inicial de 345 kg, distribu��dos em um delineamento em blocos casualizados, com seis repeti����es. Todas as ra����es continham 60% de volumoso e 40% de mistura concentrada constitu��da por fub�� de milho e minerais, na base da mat��ria seca. O experimento teve dura����o de 100 dias, 16 dias de adapta����o e tr��s per��odos de 28 dias para a avalia����o do desempenho. O avan��o da idade de rebrota do capim-tifton 85 produziu comportamento linear decrescente para consumos de MS, PB e EE, enquanto os consumos de CT e FDN n��o foram afetados pela idade de rebrota. O ganho m��dio di��rio de peso (1,23 kg) e a convers��o alimentar (6,35) n��o foram influenciados pela idade de rebrota. Os coeficientes de digestibilidade de MS (59,6), PB (48,0), EE (53,2), CT (63,6) e FDN (41,5) tamb��m n��o foram influenciados pela idade de rebrota do feno de capim-tifton 85. Embora as dietas utilizadas sejam eq��ivalentes nutricionalmente, recomenda-se a idade de corte de 42 dias de rebrota.

Desempenho de novilhos recebendo dietas �� base de cana-de-a����car in natura ou hidrolisada

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Complete replacement of the mitochondrial genotype in a Bos indicus calf reconstructed by nuclear transfer to a bos taurus oocyte

Due to the exclusively maternal inheritance of mitochondria, mitochondrial genotypes can be coupled to a particular nuclear genotype by continuous mating of founder females and their female offspring to males of the desired nuclear genotype. However, backcrossing is a gradual procedure that, apart from being lengthy, cannot ascertain that genetic and epigenetic changes will modify the original nuclear genotype. Animal cloning by nuclear transfer using host ooplasm carrying polymorphic mitochondrial genomes allows, among other biotechnology applications, the coupling of nuclear and mitochondrial genotypes of diverse origin within a single generation. Previous attempts to use Bos taurus oocytes as hosts to transfer nuclei from unrelated species led to the development to the blastocyst stage but none supported gestation to term. Our aim in this study was to determine whether B. taurus oocytes support development of nuclei from the closely related B. indicus cattle and to examine the fate of their mitochondrial genotypes throughout development. We show that indicus:taurus reconstructed oocytes develop to the blastocyst stage and produce live offspring after transfer to surrogate cows. We also demonstrate that, in reconstructed embryos, donor cell-derived mitochondria undergo a stringent genetic drift during early development leading, in most cases, to a reduction or complete elimination of B. indicus mtDNA. These results demonstrate that cross-subspecies animal cloning is a viable approach both for matching diverse nuclear and cytoplasmic genes to create novel breeds of cattle and for rescuing closely related endangered cattle.

Correla����o de diferentes per��odos de jejum com n��veis s��ricos de cortisol, glicemia plasm��tica, estado cl��nico e equil��brio ��cido-base em case submetidos �� anestesia geral inalat��ria

This study correlated the solid preoperative fasting periods with plasma glycemia, serum cortisol, condition clinic and acid-base balance in dogs submitted to inhalation of general anaesthesia. Eight adults, animals were distributed into three groups in accordance with solid preoperative fasting: group 1 (12 hours), group 2 (18 hours) and group 3 (24 hours). Gastric emptying was observed and following this animals were submitted to the same anesthetic procedure. Heart and respiratory rate, rectal temperature, capillary refill time, percent hydration and noninvasive arterial pressure determined before and after Acepromazine and every 10 minutes during anaesthesia, included ETCO 2; values blood gas (pH, PaCO 2, PaO 2, HCO 3, TCO 2, SaO 2, BE), glycemic and serum cortisol were analyzed before MPA and each 30 minutes during anaesthesia. In recovery anaesthetic, glycemia and serum cortisol were repeated. During anaesthesia there were little cardiovascular and respiratory alteration not having interference of the preoperative fasting periods. Animals with 12 hours of the preoperative fasting showed a higher rise in glycemia levels than others groups in recovery anaesthetic. Serum cortisol wasn't influenced by fasting. Solid preoperative fasting independent of the duration describe a discreet respiratory alkalosis. All animals showed good clinical condition in all three groups. Solid preoperative fasting of the 18 hours is recommended to ensure a complete absence of the solid food contents in stomach.

Influence of storage period and effect of different brands of acrylic resin on the dimensional accuracy of the maxillary denture base

The aim of this study was to evaluate the dimensional changes of denture bases made from different resins after different storage periods. For this purpose, 25 sets of plaster models/resin bases were prepared using 4 acrylic resins submitted to two types of polymerization: 1- QC-20 submitted to polymerization by microwave energy; 2- QC-20 submitted to polymerization by water hot bath; 3- Vipi Cril submitted to polymerization by water hot bath; 4- Vipi Wave submitted to polymerization by microwave energy; and 5- Onda Cryl submitted to polymerization by microwave energy. After polymerization, the specimens were sectioned for accuracy readings using a comparison microscope. Readings were taken at 3 points: the crests of the right (A) and left (B) ridges, and the median region of the palate, in 4 different periods. The data obtained were submitted to two-way ANOVA and Tukey's test at 5% significance level. The greatest distortions were found in the posterior palatal region of the base (M), with statistically significant difference (p<0.05) for the studied resins. All acrylic resins presented dimensional changes and the storage period influenced these alterations.

Aspectos sensoriais e f��sico-qu��micos de iogurtes de soja com espessantes/estabilizantes �� base de f��cula de inhame (Dioscorea alata), amido modificado e gelatina

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Desenvolvimento de produto tipo ���snack��� a base de carne mecanicamente separada de til��pia do Nilo

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)