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Id: biblio-1040117
Autor: Abreu, Fernando Antônio Mauad de; Reis, Igor Daniel Garcia; Silva, Gerluza Aparecida Borges; Jorge, Erika Cristina.
Título: Collection and culture of human connective tissue cells from gingival explant technique for oral tissue bioengineering / Colección de células de tejido conectivo humano a partir de la técnica de explante gingival para bioingeniería de tejidos orales
Fonte: Int. j. morphol;37(4):1229-1233, Dec. 2019. graf.
Idioma: en.
Resumo: SUMMARY: Cell culture is an important tool in medical, odontological and biological research laboratories, supporting cell therapies and tissue bioengineering strategies. Gingival fibroblasts present structural function, being able to modulate their metabolic capacity, which is reflected in the tissue morphology. The possibility of culturing fibroblasts in vitro, in monolayer or on three-dimensional scaffolds, for subsequent transplants in vivo opens important perspectives for the periodontal surgical clinic. The objective of the present article is to present a method of obtaining and cultivating viable human gingival fibroblasts for in vitro research. Explants derived from periodontal surgical discards were used, grown in 25 cm2 bottles to obtain a primary cell culture. After observing the proliferation and growth of the fibroblasts that interconnected and formed a monolayer network, involving the periphery of the explants, it was possible to remove the explants, to make the passage and the new subcultures were obtained in a ratio of 1:1. After 7 days, the amount of viable cells was analyzed in triplicate, using the Neubauer chamber technique, in cell culture bottles of 25 mm2 (T25) and 75 mm2 (T75). Fibroblasts were described and subclassified morphologically. The results showed a growth pattern in both bottles, but with a larger number in bottles of 75 cm2. Cells with fibroblastic morphology were subclassified into reticular and fusiform, being predominant those with fusiform morphology. In conclusion, culture of explant of human gingival connective tissue is a viable method for obtaining gingival connective tissue cells suitable for laboratory tests in cell culture, aiming at obtaining constructs for gingival tissue engineering.

RESUMEN: El cultivo celular es una herramienta importante en los laboratorios de investigación médica, odontológica y biológica, que apoyan las terapias celulares y las estrategias de bioingeniería de tejidos. Los fibroblastos gingivales presentan una función estructural, pudiendo modular su capacidad metabólica, que se refleja en la morfología tisular. La posibilidad de cultivar fibroblastos in vitro, en monocapa o en andamios tridimensionales, para trasplantes posteriores in vivo abre perspectivas importantes para la clínica de cirugía periodontal. El objetivo del presente artículo es presentar un método para obtener y cultivar fibroblastos gingivales humanos viables para investigación in vitro. Se utilizaron explantes derivados de los descartes quirúrgicos periodontales, crecidos en frascos de 25 cm2 para obtener un cultivo de células primarias. Después de observar la proliferación y el crecimiento de los fibroblastos que se interconectaron y formaron una red de monocapa, que involucraba la periferia de los explantes, fue posible eliminar los explantes, hacer el pasaje y los nuevos subcultivos se obtuvieron en una proporción de 1:1. Después de 7 días, la cantidad de células viables se analizó por triplicado, utilizando la técnica de cámara de Neubauer, en botellas de cultivo celular de 25 mm2 (T25) y 75 mm2 (T75). Los fibroblastos fueron descritos y sub-clasificados morfológicamente. Los resultados mostraron un patrón de crecimiento en ambas botellas, pero con un número mayor en botellas de 75 cm2. Las células con morfología fibroblástica se subclasificaron en reticulares y fusiformes, predominando aquellas con morfología fusiforme. En conclusión, el cultivo de explante de tejido conectivo gingival humano es un método viable para obtener células de tejido conectivo gingival adecuadas para pruebas de laboratorio en cultivos celulares, con el objetivo de obtener construcciones para la ingeniería del tejido gingival.
Descritores: Células do Tecido Conjuntivo
Técnicas de Cultura de Células/métodos
Bioengenharia/métodos
Gengiva/citologia
-Biologia Celular
Fibroblastos
Limites: Seres Humanos
Responsável: CL1.1 - Biblioteca Central


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Id: lil-734829
Autor: Gómez Arcila, Verónica; Mercado Camargo, Jairo; Herrera Herrera, Alejandra; Fang Mercado, Luis; Díaz Caballero, Antonio.
Título: Níquel en cavidad oral de individuos con agrandamiento gingival inducido por tratamiento ortodóncico / Nickel in oral cavity of individuals with gingival overgrowth induced by orthodontic treatment
Fonte: Rev. clín. periodoncia implantol. rehabil. oral (Impr.);7(3):136-141, dic. 2014. ilus, tab.
Idioma: es.
Projeto: Departamento Administrativo de Ciencia, Tecnología e Innovación -Colciencias.
Resumo: El agrandamiento gingival es una de las alteraciones orales generadas por el uso de aparatología ortodóncica fija. Inicialmente fue descrito como producto de la respuesta alérgica del huésped al níquel, y estudios recientes demostraron que este metal induce proliferación fibroblástica. Sin embargo, se desconoce el grado de bioacumulación de este metal en la cavidad oral. El objetivo del presente estudio consistió en cuantificar la concentración de níquel en muestras de saliva, placa dental y encía de individuos con aparatología ortodóncica fija con y sin agrandamiento gingival. El tamaño de la muestra se estableció según tendencia histórica, evaluando un total de 24 individuos con tratamiento ortodóncico activo, los cuales fueron clasificados en 2 grupos: 12 con agrandamiento gingival (grupo A) y 12 sin agrandamiento gingival (grupo B). De cada participante se obtuvieron muestras de: encía, saliva estimulada y placa dental. Una vez procesadas las muestras se midieron las concentraciones de níquel en mg/l, mediante espectrofotometría de absorción atómica (Thermo Scientific. Atomic absorption spectrometer iCE 3000, Reino Unido). El análisis estadístico se realizó mediante el software SPSS v20. Al comparar los niveles de níquel en muestras de saliva estimulada, placa dental y encía entre los individuos con y sin agrandamiento gingival, se observaron niveles significativamente mayores de níquel en las muestras de encía del grupo A (medias = 0,61 mg/l vs 0,36 mg/l; p = 0,001). Sin embargo, no se observó diferencia estadísticamente significativa al comparar las concentraciones de Ni en saliva entre el grupo A y B (medias = 0,502 mg/l vs 0,473 mg/l; p = 0,178, respectivamente). A partir de estos resultados se concluye que el uso de aparatología ortodóncica fija conlleva distintos niveles de bioacumulación de iones níquel en la encía al comparar ambos grupos. Es probable que altas concentraciones de este metal estén relacionadas con la etiología del agrandamiento gingival, por lo que se requieren nuevos estudios para establecer causalidad.

Gingival overgrowth is an oral condition generated by the use of fixed orthodontic appliances. It was initially described as a product of the allergic response of the host to Nickel, and recent studies showed that this metal induces fibroblast proliferation. However, the degree of bioaccumulation of this metal in the oral cavity is unknown. The aim of this study was to quantify the concentrations of nickel in samples of saliva, dental plaque, and gingiva of individuals with fixed orthodontic appliances with and without gingival overgrowth. The sample size was established according to historical trends, evaluating 24 individuals with active orthodontic treatment, which were classified in two groups: 12 with gingival overgrowth (Group A) and 12 without gingival overgrowth (Group B). Samples of gingival, stimulated saliva and dental plaque were obtained from each participant. Once the sample were processed, nickel concentrations were measured in [mg/L] by atomic absorption spectrophotometry (Thermo Scientific. Atomic absorption spectrometer iCE 3000, UK). Statistical analysis was performed using SPSS v20. The levels of Nickel in samples of stimulated saliva, dental plaque and gingiva were compared between individuals in group A and group B. There were significantly higher levels of nickel in gingiva samples in group A (mean = 0.61 mg/L vs. 0.36 mg/L, P = .001). However, no statistical difference was observed when comparing the concentrations of nickel in saliva between groups A and B (mean = 0.502 mg/L vs. 0.473 mg/L, P = .178, respectively). The use of fixed orthodontic appliances leads to different levels of bioaccumulation of nickel in gingiva when comparing both groups. High concentrations of this metal are probably associated with the origin of gingival overgrowth. Further studies are required to establish causation.
Descritores: Aparelhos Ortodônticos
Hiperplasia Gengival
Níquel/análise
-Saliva
Espectrofotometria Atômica
Crescimento Excessivo da Gengiva
Placa Dentária
Gengiva
Limites: Seres Humanos
Masculino
Adolescente
Responsável: CL1.1 - Biblioteca Central


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Id: lil-779905
Autor: GONÇALVES, Cristiane; SOARES, Geisla Mary S; FAVERI, Marcelo; PÉREZ-CHAPARRO, Paula Juliana; LOBÃO, Eduardo; FIGUEIREDO, Luciene Cristina; BACCELLI, Gustavo Titonele; FERES, Magda.
Título: Association of three putative periodontal pathogens with chronic periodontitis in Brazilian subjects
Fonte: J. appl. oral sci;24(2):181-185, Mar.-Apr. 2016. tab, graf.
Idioma: en.
Projeto: São Paulo Research Foundation.
Resumo: ABSTRACT Objective The aim of this study was to evaluate the association of Porphyromonas endodontalis, Filifactor alocis and Dialister pneumosintes with the occurrence of periodontitis. Material and Methods Thirty subjects with chronic periodontitis (ChP) and 10 with periodontal health (PH) were included in the study. Nine subgingival biofilm samples were collected as follows: i) PH group - from the mesial/buccal aspect of each tooth in two randomly chosen contralateral quadrants; ii) ChP group - from three sites in each of the following probing depth (PD) categories: shallow (≤3 mm), moderate (4-6 mm) and deep (≥7 mm). Checkerboard DNA-DNA hybridization was used to analyze the samples. Results We found the three species evaluated in a higher percentage of sites and at higher levels in the group with ChP than in the PH group (p<0.05, Mann-Whitney test). We also observed these differences when the samples from sites with PD≤4 mm or ≥5 mm of subjects with ChP were compared with those from subjects with PH (p<0.05, Mann-Whitney test). In addition, the prevalence and levels of D. pneumosintes, and especially of F. alocis were very low in healthy subjects (0.12x105 and 0.01x105, respectively). Conclusion F. alocis and D. pneumosintes might be associated with the etiology of ChP, and their role in the onset and progression of this infection should be further investigated. The role of P. endodontalis was less evident, since this species was found in relatively high levels and prevalence in the PH group.
Descritores: Peptostreptococcus/patogenicidade
Porphyromonas endodontalis/patogenicidade
Veillonellaceae/patogenicidade
Periodontite Crônica/microbiologia
-Peptostreptococcus/isolamento & purificação
Brasil
DNA Bacteriano
Contagem de Colônia Microbiana
Sondas de DNA
Estudos de Casos e Controles
Estatísticas não Paramétricas
Biofilmes
Porphyromonas endodontalis/isolamento & purificação
Placa Dentária/microbiologia
Veillonellaceae/isolamento & purificação
Gengiva/microbiologia
Limites: Seres Humanos
Masculino
Feminino
Adulto
Meia-Idade
Responsável: BR1.1 - BIREME


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Id: lil-777159
Autor: MATIĆ PETROVIĆ, Sanja; CIMBALJEVIĆ, Milena; RADUNOVIĆ, Milena; KUZMANOVIĆ PFIĆER, Jovana; JOTIĆ, Aleksandra; PUCAR, Ana.
Título: Detection and sampling methods for isolation of Candidaspp. from oral cavities in diabetics and non-diabetics
Fonte: Braz. oral res. (Online);29(1):1-7, 2015. tab, ilus.
Idioma: en.
Projeto: Ministry of Education, Science and Technological Development of the Republic of Serbia.
Resumo: The purpose of this study was to detect Candida spp. on the tongue and in the subgingival sites in healthy and type 2 diabetes (T2D) patients with chronic periodontitis (CP), and to compare the accuracy of sampling methods. This study included 131 patients divided into four groups: healthy control (group A), nondiabetics + CP (Group B), diabetics with good metabolic control + CP (group C) and diabetics with poor glycoregulation + CP (Group D). Cotton swab samples from tongue and subgingival samples were obtained from each patient with help of sterile paper points and a sterile curette. Swab cultures were made on Sabouraud dextrose agar. The number of CFUs was counted. The sampling methods for subgingival plaque were compared by Receiving Operator Curve (ROC). The presence of Candida spp. on the tongue was statistically significant among groups (group D vs. others three groups: χ2: p < 0.005 for each group). Positive findings of subgingival Candida spp. did not differ among the groups. There were no significant differences in the quantification ofCandida spp., neither on the tongue, nor in the subgingival samples. 17.2% of diabetic patients revealed the presence ofCandida spp. in the subgingival samples, with negative finding on tongue. There was a significant difference in the sampling methods for subgingival plaque (p = 0.000). Candidaspp. is more prevalent on the tongue of diabetics. The sampling of subgingival plaque by a sterile curette is more accurate than with paper points. Subgingival plaque may represent a reservoir of commensals. It is necessary to standardize the sampling of subgingival plaque.
Descritores: Língua/microbiologia
Candida albicans/isolamento & purificação
Diabetes Mellitus Tipo 2/microbiologia
Periodontite Crônica/microbiologia
Gengiva/microbiologia
-Valores de Referência
Periodonto/microbiologia
Contagem de Colônia Microbiana
Métodos Epidemiológicos
Biofilmes
Limites: Seres Humanos
Masculino
Feminino
Adulto
Meia-Idade
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: biblio-841158
Autor: MIRANDA, Tamires Szeremeske; FERES, Magda; RETAMAL-VALDÉS, Belén; PEREZ-CHAPARRO, Paula Juliana; MACIEL, Suellen Silva; DUARTE, Poliana Mendes.
Título: Influence of glycemic control on the levels of subgingival periodontal pathogens in patients with generalized chronic periodontitis and type 2 diabetes
Fonte: J. appl. oral sci;25(1):82-89, Jan.-Feb. 2017. tab, graf.
Idioma: en.
Projeto: São Paulo Research Foundation; . São Paulo Research Foundation.
Resumo: Abstract Objective This study evaluated the influence of glycemic control on the levels and frequency of subgingival periodontal pathogens in patients with type 2 diabetes mellitus (DM) and generalized chronic periodontitis (ChP). Material and Methods Fifty-six patients with generalized ChP and type 2 DM were assigned according to the levels of glycated hemoglobin (HbA1c) into one of the following groups: HbA1c<8% (n=28) or HbA1c≥8% (n=28). Three subgingival biofilm samples from sites with probing depth (PD)<5 mm and three samples from sites with PD≥5 mm were analyzed by quantitative Polymerase Chain Reaction (PCR) for the presence and levels of Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Eubacterium nodatum, Parvimona micra, Fusobacterium nucleatum ssp. and Prevotella intermedia. Results The mean counts of F. nucleatum ssp. were statistically significantly higher in the sites with PD≥5 mm of the HbA1c≥8% group (p<0.05). Frequencies of detection of T. forsythia, E. nodatum, P. micra and F. nucleatum ssp. were all higher in the sites with PD≥5 mm of the patients with HbA1c≥8%, compared with those of patients with HbA1c<8% (p<0.05). Frequency of detection of P. intermedia was higher in the sites with PD<5 mm of the patients with HbA1c≥8% than those of the patients with HbA1c<8% (p<0.05). Conclusions Poor glycemic control, as indicated by HbA1c≥8%, is associated with increased levels and frequencies of periodontal pathogens in the subgingival biofilm of subjects with type 2 DM and ChP.
Descritores: Glicemia/análise
Diabetes Mellitus Tipo 2/microbiologia
Diabetes Mellitus Tipo 2/terapia
Periodontite Crônica/microbiologia
Periodontite Crônica/sangue
Gengiva/microbiologia
-Contagem de Colônia Microbiana
Resultado do Tratamento
Estatísticas não Paramétricas
Biofilmes
Placa Dentária/microbiologia
Diabetes Mellitus Tipo 2/complicações
Carga Bacteriana
Reação em Cadeia da Polimerase em Tempo Real
Bactérias Gram-Negativas/isolamento & purificação
Hiperglicemia/prevenção & controle
Limites: Seres Humanos
Masculino
Feminino
Adulto
Meia-Idade
Tipo de Publ: Estudos de Avaliação
Responsável: BR1.1 - BIREME


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Antoniazzi, Joäo Humberto
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Id: biblio-841151
Autor: NOGALES, Carlos Goes; FERREIRA, Marina Beloti; MONTEMOR, Antonio Fernando; RODRIGUES, Maria Filomena de Andrade; Lage-MARQUES, José Luiz; ANTONIAZZI, João Humberto.
Título: Ozone therapy as an adjuvant for endondontic protocols: microbiological – ex vivo study and citotoxicity analyses
Fonte: J. appl. oral sci;24(6):607-613, Nov.-Dec. 2016. tab.
Idioma: en.
Projeto: São Paulo Research Foundation.
Resumo: ABSTRACT Objectives This study evaluated the antimicrobial efficacy of ozone therapy in teeth contaminated with Pseudomonas aeruginosa, Enterococcus faecalis, and Staphylococcus aureus using a mono-species biofilm model. Parallel to this, the study aimed to evaluate the cytotoxicity of ozone for human gingival fibroblasts. Material and Methods: One hundred and eighty single-root teeth were contaminated with a mono-species biofilm of Enterococcus faecalis, Pseudomonas aeruginosa, and Staphylococcus aureus. Groups were formed: Group I – control; Group II – standard protocol; Group III – standard protocol + ozone gas at 40 µg/mL; and Group IV – standard protocol + aqueous ozone at 8 µg/mL. In parallel, human gingival fibroblasts were submitted to the MTT test. Cells were plated, then ozone was applied as follows: Group I (control) – broth medium; Group II – aqueous ozone at 2 µg/mL; Group III – aqueous ozone at 5 µg/mL; and Group IV – aqueous ozone at 8 µg/mL. Data were submitted to the Kruskal Wallis test and Bonferroni post hoc analyses to assess microbiology and cytotoxicity, respectively (p<0.05%). Results The results revealed antimicrobial efficacy by Group IV with no CFU count. The cytotoxicity assay showed Groups III and IV to be the most aggressive, providing a decrease in cell viability at hour 0 from 100% to 77.3% and 68.6%, respectively. Such a decrease in cell viability was reverted, and after 72 hours Groups III and IV provided the greatest increase in cell viability, being statistically different from Groups I and II. Conclusion According to the applied methodology and the limitations of this study, it was possible to conclude that ozone therapy improved the decontamination of the root canal ex vivo. Ozone was toxic to the cells on first contact, but cell viability was recovered. Thus, these findings suggest that ozone might be useful to improve root canal results.
Descritores: Ozônio/farmacologia
Pseudomonas aeruginosa/efeitos dos fármacos
Staphylococcus aureus/efeitos dos fármacos
Enterococcus faecalis/efeitos dos fármacos
Cavidade Pulpar/microbiologia
Fibroblastos/efeitos dos fármacos
Anti-Infecciosos/farmacologia
-Hipoclorito de Sódio/farmacologia
Fatores de Tempo
Contagem de Colônia Microbiana
Sobrevivência Celular/efeitos dos fármacos
Adjuvantes Farmacêuticos/farmacologia
Reprodutibilidade dos Testes
Biofilmes/efeitos dos fármacos
Cavidade Pulpar/efeitos dos fármacos
Gengiva
Limites: Seres Humanos
Tipo de Publ: Estudos de Avaliação
Responsável: BR1.1 - BIREME


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Id: lil-615101
Autor: Portelles Massó, Ayelén María; Heredia Pérez, José María.
Título: Granuloma central de células gigantes / Giant cells central granuloma
Fonte: Rev. cuba. estomatol;48(1):84-88, ene.-mar. 2011.
Idioma: es.
Resumo: El granuloma reparativo central de células gigantes es una lesión proliferativa no neoplásica de etiología desconocida. Se presenta un paciente masculino de 40 años de edad, portador de prótesis parcial superior. Fue remitido al Servicio de Cirugía Maxilofacial del Hospital V I Lenin por presentar aumento de volumen en reborde alveolar superior, de color rojo grisáceo y que provocaba expansión de corticales óseas. Una vez analizados los exámenes clínicos, radiográficos e histopatológicos se diagnosticó un granuloma reparativo central de células gigantes Se realizó exéresis quirúrgica de la lesión y extracción de dientes adyacentes con una evolución satisfactoria sin señales de recidivas luego de tres años del tratamiento. El granuloma reparativo central de células gigantes se presentó como respuesta a un trauma. La correcta interpretación de los datos clínicos, radiográficos e histopatológicos nos permitió llegar al correcto diagnóstico y plan de tratamiento(AU)

Giant-cell central reparative granuloma is non neoplastic proliferative lesion of unknown etiology. We report a 40 years old male patient who was admitted at the Maxillofacial Service of the V I Lenin Hospital. The patient had partial upper prosthesis and was complaining of red-grey volume increase lesion in upper alveolar ridge which led to the expansion of cortical bone. Having analyzed clinical, radiographic and histopathological findings the case was concluded as a giant-cell central reparative granuloma. Surgical exeresis and adjunct tooth extraction were done. After three years of treatment, satisfactory follow up without recurrence is reported(AU)
Descritores: Granuloma de Células Gigantes/diagnóstico por imagem
Aumento do Rebordo Alveolar/efeitos adversos
Gengiva/lesões
Granuloma de Células Gigantes/cirurgia
Limites: Seres Humanos
Masculino
Adulto
Tipo de Publ: Relatos de Casos
Responsável: CU1.1 - Biblioteca Médica Nacional


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Id: biblio-1046734
Autor: Arroyo Carbajal, Natalí.
Título: Reposicionamiento labial para el tratamiento de la sonrisa gingival. Revisión de la literatura / Labial repositioning for the treatment of the gummy smile. A review of the literature
Fonte: Rev. cient. odontol;7(2):97-107, jul.-dic. 2019. ilus.
Idioma: es.
Resumo: Los pacientes de hoy exigen una sonrisa atractiva o agradable que no sea motivo de vergüenza al expresarla. Actualmente, las personas le dan gran importancia a la belleza física, ya que es el reflejo de la identidad propia. Diferentes factores afectan la sonrisa y la estética, incluido el color, la forma y la posición del diente, especialmente los dientes anteriores. La sonrisa gingival excesiva es considerada dentro de la clasificación de la Academia Americana de Periodoncia (AAP) como una condición clínica en la que la encía está expuesta (> 2 mm) cuando se sonríe. La manifestación de la sonrisa gingival tiene diferentes etiologías, entre ellas los factores dentales, esqueléticos, de tejidos blandos y la combinación de ellos. Para su manejo, se debe establecer un buen diagnóstico y etiología a fin de determinar la mejor opción de tratamiento entre las diversas técnicas descritas en la literatura. La técnica de reposicionamiento labial parece ser una buena alternativa, ya que el tratamiento ha demostrado resultados estables. Se logra cuando se retira una tira de mucosa del labial maxilar y luego se sutura la mucosa labial a la línea mucogingival. Es menos traumática, con pocas complicaciones posoperatorias y recuperación rápida, por lo cual logra satisfacer los requerimientos estéticos del paciente. El objetivo principal de este artículo es conocer las consideraciones actuales para la técnica de reposicionamiento labial utilizada como tratamiento de la sonrisa gingival y analizar el resultado que genera en pacientes que sufren un cambio para mejorar su estética y autoestima. (AU)

Patients today demand an attractive or pleasant smile that is not a cause of shame. Nowadays, people give great importance to physical beauty as it is the reflection of one's identity. Different factors can affect smiling and aesthetics, including the color, shape and position of the teeth, especially the anterior teeth. The Classification of the American Academy of Periodontics (AAP) describes an excessive gingival smile as a clinical condition in which the gum is exposed (or 2mm) when smiling. The etiology of a gingival smile involves many factors, including dental, skeletal, and soft tissue factors and a combination of the three. To achieve adequate management of a gingival smile, the diagnosis and etiology of the condition should be established in order to determine the best treatment option from among the various techniques described in the literature. The main objective of this article is to describe the lip repositioning technique for the treatment of the gingival smile and analyze the results in patients who undergo this procedure to improve their aesthetics and self-esteem. The lip repositioning technique seems to be a good alternative as stable results have been reported. The procedure involves the removal of a strip of mucosa from the maxillary oral lobe and suturing of the lip mucosa to the mucogingival line. This technique induces less trauma, few postoperative complications and rapid recovery, and fulfillls the aesthetic requirements of the patient. (AU)
Descritores: Sorriso
Gengiva
Limites: Seres Humanos
Masculino
Feminino
Tipo de Publ: Revisão
Responsável: PE391.9 - UCS - Universidad Científica del Sur


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Id: biblio-1040710
Autor: Silva, Natália S; Borsanelli, Ana Carolina; Gaetti-Jardim Júnior, Elerson; Schweitzer, Christiane Marie; Silveira, José Alcides S; Bomjardim, Henrique A; Dutra, Iveraldo S; Barbosa, José D.
Título: Subgingival bacterial microbiota associated with ovine periodontitis / Microbiota bacteriana subgengival associada à periodontite ovina
Fonte: Pesqui. vet. bras = Braz. j. vet. res;39(7):454-459, July 2019. tab.
Idioma: en.
Resumo: Periodontitis is an inflammatory response in a susceptible host caused by complex microbiota, predominantly composed of Gram-negative anaerobic bacteria. Aiming to characterize the subgingival bacterial microbiota associated with ovine periodontitis, polymerase chain reaction (PCR) was performed in subgingival periodontal pocket samples of 14 sheep with severe periodontitis and in subgingival sulcus biofilm of 14 periodontally healthy sheep in search mainly of Gram-negative and Gram-positive microorganisms considered important periodontopathogens. The most prevalent bacteria in the sheep with periodontal lesions were Tannerella forsythia (78.6%), Treponema denticola (78.6%), Fusobacterium nucleatum (64.3%), and Porphyromonas gingivalis (50%), whereas in the healthy sheep, F. nucleatum (42.8%) was the most often detected bacterium. Statistically significant differences were observed for Campylobacter rectus, Enterococcus faecium, Prevotella nigrescens, T. forsythia, and T. denticola (p<0.05) in the sheep with periodontitis in the comparison between groups. Aggregatibacter actinomycetemcomitans, Enterococcus faecalis, and Porphyromonas gulae were not detected in any of the samples analyzed. In conclusion, C. rectus, E. faecium, P. nigrescens, T. forsythia, and T. denticola were associated with severe lesions caused by ovine periodontitis, and F. nucleatum was the most prevalent microorganism in the subgengival sulcus biofilm of healthy sheep.(AU)

Periodontite é a resposta inflamatória de um hospedeiro suscetível causada por complexa microbiota, composta predominantemente por bactérias anaeróbias Gram-negativas. Com o objetivo de caracterizar a microbiota bacteriana subgengival associada à periodontite ovina foi realizada a reação em cadeia da polimerase (PCR) de amostras de biofilme subgengival de 14 ovinos com a enfermidade e 14 ovinos periodontalmente saudáveis, com destaque para micro-organismos Gram-negativos e Gram-positivos considerados importantes periodontopatógenos. As bactérias mais prevalentes em 14 animais com lesões periodontais foram Tannerella forsythia (78,6%), Treponema denticola (78,6%), Fusobacterium nucleatum (64,3%) e Porphyromonas gingivalis (50%). Entretanto, nos 14 ovinos sem lesões periodontais, F. nucleatum (42,8%) foi a bactéria mais detectada. Associação estatisticamente diferente foi observada para Campylobacter rectus, Enterococcus faecium, Prevotella nigrescens, T. forsythia e T. denticola (p<0,05) nos ovinos com periodontite em comparação entre os dois grupos. Aggregatibacter actinomycetemcomitans, Enterococcus faecalis e Porphyromonas gulae não foram detectados em nenhuma das amostras pesquisadas. Conclui-se que C. rectus, E. faecium, P. nigrescens, T. forsythia e T. denticola estão associados às lesões resultantes da periodontite ovina com manifestação clínica grave e F. nucleatum o micro-organismo mais prevalente no biofilme subgengival de animais periodontalmente sadios.(AU)
Descritores: Doenças Periodontais/veterinária
Periodontite/veterinária
Ovinos
Gengiva/microbiologia
-Bactérias Anaeróbias
Reação em Cadeia da Polimerase/veterinária
Microbiota
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-984516
Autor: Moras, Luis Lemos; Carvalho, Thamara Angeliny; Oliveira, Marina Bragheto; Ricci, Gabriel Andrey; Accarini, Renata; Godoy, Moacir Fernandes de.
Título: Impact of Periodontal Disease on Late Morbimortality (10 Years) of Pacientes with Acute Coronary Syndrome
Fonte: Int. j. cardiovasc. sci. (Impr.);32(1):35-40, jan.-fev. 2019. tab, graf.
Idioma: en.
Resumo: It is known that predisposing factors for periodontal disease (PD) and cardiovascular diseases are similar, just as dissemination of oral flora pathogens can induce the development of cardiovascular diseases, which play a direct role on the morbimortality of patients. Objective: To assess the impact of periodontal disease in the presence of acute coronary syndrome on late morbimortality after long-term follow-up of patients (10 years). Methods: The historical prospective study of continuous assessment was based on the evaluation of 345 medical records of patients hospitalized for acute coronary syndrome, divided into 3 groups: edentulous, with periodontal disease and without periodontal disease. The patients studied were in the ICU, in 2006, with a clinical picture of acute coronary syndrome submitted to invasive stratification with coronary angiography on the basis of clinical indication and were reassessed over the next 10 years. The qualitative variables were compared using the Chi-square test. Long-term mortality was assessed using the Kaplan-Meier curves, quantified with the hazard ratio (HR) and a confidence interval of 95% and compared through Cox regression. P values of less than or equal to 0.05 were regarded as statistically significant. Results: Of the 345 patients, 233 had at least one coronary obstruction greater than or equal to 50%, being the main group for comparison according to the different status of periodontal disease (without periodontal disease, with periodontal disease and edentulous). In this cardiovascular condition, we found a difference in mortality among edentulous patients compared to those free of periodontal disease, with a p = 0.004 and a hazard ratio of 10.496 (95% CI: 4.988-22.089). A significant difference was also noted between edentulous patients and patients with periodontal disease, with a p = 0.0017 and a hazard ratio of 2.512 (95% CI: 1.491-4.234). Conclusion: A significant increase in mortality was found according with the progression of periodontal disease, which justifies its classification as an important risk factor for the development of cardiovascular diseases, as well as the need for prevention and treatment of oral diseases
Descritores: Doenças Periodontais/complicações
Placa Dentária/complicações
Síndrome Coronariana Aguda/mortalidade
-Doenças Cardiovasculares
Análise Estatística
Estudos Prospectivos
Fatores de Risco
Placa Aterosclerótica
Gengiva
Gengivite/complicações
Inflamação/complicações
Limites: Seres Humanos
Masculino
Feminino
Responsável: BR44.1 - Serviço de Biblioteca, Documentação Científica e Didática Prof. Dr. Luiz Venere Décourt



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