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1.
Rev. ADM ; 79(3): 165-176, mayo-jun. 2022. ilus, tab
Article in Spanish | LILACS | ID: biblio-1378976

ABSTRACT

Introducción: El hueso, reservorio de minerales y moléculas orgánicas, es un tejido dinámico que detecta y se adapta a las cargas mecánicas de los órganos y tejidos del cuerpo, el cual mantiene la estructura ósea del esqueleto durante el crecimiento y a través de la vida del ser humano. Las células óseas son sensibles a las cargas mecánicas y microvibra- ciones que recibe el esqueleto. Objetivo: El propósito de este estudio fue realizar una revisión sistemática acerca de los efectos que ejerce la microvibración de alta frecuencia-baja intensidad, en osteocitos cultivados in vitro sobre la síntesis de factores solubles, con el propósito de entender si la microvibración tiene influencia en la aceleración del movimiento dentario. Material y métodos: Se realizó una búsqueda de artículos de revisión de osteocitos y otras células óseas in vitro, a través de la estrategia PICO (Paciente, Intervención, Comparación, Resultado [Outcome]), con el empleo de palabras clave como: «os- teocitos¼, «microvibración¼, «remodelación¼, «osteoclastogénesis¼, «citocinas¼ y «osteoblastos¼. Se estructuró por medio de PRISMA (informe de revisiones sistemáticas y meta-análisis). La captación de datos finales se hizo por medio del método de puntuación de calidad Jadad y Cochrane (modelo de correlación) como herramientas para evaluar el riesgo de sesgo de cada uno de los artículos. Se incluyeron 11 artículos con alta calidad metodológica. Resultados: La mayoría de los experimentos in vitro demostraron que la microvibración tuvo un aumento estadísticamente significativo en la proliferación y dife- renciación de las células madre mesenquimales (MSC), en osteoblastos (MC3T3-E1), en la expresión de proteínas para inducir osteogénesis y en los osteocitos (MLO-Y4). Asimismo, sobrerregularon la expresión de osteoprotegerina (OPG), prostaglandina (PGE2) y óxido nitroso (NO) al alterar y regular los factores solubles como las citocinas, factores de crecimiento y quimiocinas, de las demás células, además de mostrar una disminución en la actividad de los osteoclastos (RAW246.7) en la resorción ósea. Conclusión: La microvibración induce remodelación ósea. Los osteocitos son sensibles a los estímulos mecánicos y producen factores solubles para inducir la remodelación ósea, razón por la cual se emplea la microvibración como una terapia innovadora y prometedora, no invasiva y no farmacológica en la estimulación de la formación ósea de la superficie del hueso (AU)


Subject(s)
Humans , Osteogenesis , Vibration , Bone Remodeling , Osteocytes , Bone Resorption , Analysis of Variance , Cytokines , Culture Media , RANK Ligand
2.
Journal of Integrative Medicine ; (12): 265-273, 2022.
Article in English | WPRIM | ID: wpr-929220

ABSTRACT

OBJECTIVE@#It has been reported that local vibration therapy can benefit recovery after peripheral nerve injury, but the optimized parameters and effective mechanism were unclear. In the present study, we investigated the effect of local vibration therapy of different amplitudes on the recovery of nerve function in rats with sciatic nerve injury (SNI).@*METHODS@#Adult male Sprague-Dawley rats were subjected to SNI and then randomly divided into 5 groups: sham group, SNI group, SNI + A-1 mm group, SNI + A-2 mm group, and SNI + A-4 mm group (A refers to the amplitude; n = 10 per group). Starting on the 7th day after model initiation, local vibration therapy was given for 21 consecutive days with a frequency of 10 Hz and an amplitude of 1, 2 or 4 mm for 5 min. The sciatic function index (SFI) was assessed before surgery and on the 7th, 14th, 21st and 28th days after surgery. Tissues were harvested on the 28th day after surgery for morphological, immunofluorescence and Western blot analysis.@*RESULTS@#Compared with the SNI group, on the 28th day after surgery, the SFIs of the treatment groups were increased; the difference in the SNI + A-2 mm group was the most obvious (95% confidence interval [CI]: [5.86, 27.09], P < 0.001), and the cross-sectional areas of myocytes in all of the treatment groups were improved. The G-ratios in the SNI + A-1 mm group and SNI + A-2 mm group were reduced significantly (95% CI: [-0.12, -0.02], P = 0.007; 95% CI: [-0.15, -0.06], P < 0.001). In addition, the expressions of S100 and nerve growth factor proteins in the treatment groups were increased; the phosphorylation expressions of ERK1/2 protein in the SNI + A-2 mm group and SNI + A-4 mm group were upregulated (95% CI: [0.03, 0.96], P = 0.038; 95% CI: [0.01, 0.94], P = 0.047, respectively), and the phosphorylation expression of Akt in the SNI + A-1 mm group was upregulated (95% CI: [0.11, 2.07], P = 0.031).@*CONCLUSION@#Local vibration therapy, especially with medium amplitude, was able to promote the recovery of nerve function in rats with SNI; this result was linked to the proliferation of Schwann cells and the activation of the ERK1/2 and Akt signaling pathways.


Subject(s)
Animals , Male , Peripheral Nerve Injuries/therapy , Proto-Oncogene Proteins c-akt/pharmacology , Rats , Rats, Sprague-Dawley , Sciatic Nerve/metabolism , Sciatic Neuropathy/metabolism , Vibration/therapeutic use
3.
Article in Chinese | WPRIM | ID: wpr-928048

ABSTRACT

The present study explored the drying effect of new spiral vibration drying technology on Chinese medicinal pills with Liuwei Dihuang Pills, Zhuanggu Guanjie Pills, and Muxiang Shunqi Pills as model drugs. With the drying uniformity, drying time, energy consumption, pill split, dissolution time, and change of index components as evaluation indicators, the drying effect of spiral vibration drying technology on model drugs was evaluated and compared with traditional drying methods, such as hot air drying and vacuum drying in the oven. The dynamic changes of moisture in Liuwei Dihuang Pills with different drying time were investigated. Compared with the traditional drying methods in the oven(hot air drying and vacuum drying) at 80 ℃, the spiral vibration drying only took 80 min, shortened by 80%, with 10%-13% energy consumed. The results showed that the moisture of Liuwei Dihuang Pills was negatively related to the drying time. By virtue of multi-layer countercurrent drying and super resonant fluidization techniques, the new spiral vibration drying technology can significantly improve the drying quality of Chinese medicinal pills, improve the drying efficiency, and enhance the manufacturing capacity of Chinese medicinal pills. This study is expected to provide references for the innovation and development of new drying technology of Chinese medicinal pills.


Subject(s)
China , Desiccation , Physical Therapy Modalities , Technology , Vibration
4.
Article in Chinese | WPRIM | ID: wpr-927895

ABSTRACT

Objective: To investigate the repair effect and JNK/NF-κB,SOX9 mechanisms of vibration exercise with different frequencies on articular cartilage in rats with early knee osteoarthritis. Methods: Forty-eight adult male SD rats were randomly divided into six groups(n=8):model control group(MC),high frequency vibration group 1 (GP1,60 Hz),high frequency vibration 2 group (GP2,40 Hz),medium frequency vibration group (ZP,20 Hz),minor frequency group(DP,10 Hz)and normal control group(NC). Except for NC group,the rats in each group were made into early knee osteoarthritis model after six weeks of knee joint cavity injection of papain solution and 2% mixture l-cysteine on the 1st,4 th and 7th day. Each exercise group was subjected vibration to 40 minutes a day with amplitude of 2~5 mm and 5 days a week. Four weeks later, the articular cartilage of the lateral femoral condyle of the both back leg knee joints were detected by HE staining,serine O staining and Mankin scores for morphological observation. The expression levels of JNK,NF-κB p65 and Sox9 mRNA in articular cartilage of the medial femoral condyle were detected by RT-qPCR,and the protein expressions of JNK,NF-κB p65 and Sox9 were detected by Western blot. Results: Compared with the NC group,the Mankin score in other groups was significantly higher (P<0.01). Compared with the MC group,the Mankin score of each vibration group was significantly lower(P<0.05),the mRNA and protein expressions of JNK and NF-κB p65 in each vibration training group were significantly lower (P<0.01),the expressions of Sox9 mRNA and protein in vibration training group were increased significantly (P<0.01). Compared with the higher frequency group,the Mankin score,the mRNA and protein expressions of JNK and NF-κB p65 of lower frequency group were significantly lower (P<0.05 or P<0.01). But the expressions of Sox9 mRNA and protein were significantly higher (P< 0.05 or P<0.01). Conclusion: Vibration exercise of different frequencies may present varying degrees of cartilage repair impact in rats with early knee osteoarthritis,and the cartilage repair by low-frequency vibration training is better than that by high-frequency vibration. This can be one of the mechanisms on controlling collagen synthesis by down-regulating JNK/NF-κB expression and increasing SOX9 activity of OA articular cartilage.


Subject(s)
Animals , Cartilage, Articular/metabolism , MAP Kinase Kinase 4 , Male , NF-kappa B/metabolism , Osteoarthritis, Knee/therapy , RNA, Messenger/metabolism , Rats , Rats, Sprague-Dawley , SOX9 Transcription Factor , Vibration
5.
Article in Chinese | WPRIM | ID: wpr-921825

ABSTRACT

The human spine injury and various lumbar spine diseases caused by vibration have attracted extensive attention at home and abroad. To explore the biomechanical characteristics of different approaches for lumbar interbody fusion surgery combined with an interspinous internal fixator, device for intervertebral assisted motion (DIAM), finite element models of anterior lumbar interbody fusion (ALIF), transforaminal lumbar interbody fusion (TLIF) and lateral lumbar interbody fusion (LLIF) are created by simulating clinical operation based on a three-dimensional finite element model of normal human whole lumbar spine. The fusion level is at L4-L5, and the DIAM is implanted between spinous process of L4 and L5. Transient dynamic analysis is conducted on the ALIF, TLIF and LLIF models, respectively, to compute and compare their stress responses to an axial cyclic load. The results show that compared with those in ALIF and TILF models, contact forces between endplate and cage are higher in LLIF model, where the von-Mises stress in endplate and DIAM is lower. This implies that the LLIF have a better biomechanical performance under vibration. After bony fusion between vertebrae, the endplate and DIAM stresses for all the three surgical models are decreased. It is expected that this study can provide references for selection of surgical approaches in the fusion surgery and vibration protection for the postsurgical lumbar spine.


Subject(s)
Biomechanical Phenomena , Finite Element Analysis , Humans , Lumbar Vertebrae/surgery , Pedicle Screws , Range of Motion, Articular , Spinal Fusion , Vibration
6.
Braz. dent. sci ; 24(1): 1-6, 2021. tab
Article in English | LILACS, BBO | ID: biblio-1145511

ABSTRACT

Objective: The present study aimed to assess theinfluence of vibration effect on microshear bond strength (µSBS) of flowable composite to enamel. Material and Methods: Sixty non-cariousextracted human premolar teeth were collected and randomly divided into six groups (n = 10) after being trimmed to produce a smooth flat surface: Flowable composites [Wave (SDI), Wave HV (SDI) and Grandioflow (Voco)] were used as bonding agents without or with vibration using an ultrasonic scaler (Mini Piezon, EMS, Switzerland). Composite resin, with an internal diameter of 0.7mm and height of 1mm, was cured on the substrate. The specimens' µSBS was tested by a microtensile tester (Bisco, USA) at a crosshead speed of 0.5 mm/min. The bond strength values were analyzed using one-way ANOVA and post hoc Tukey test (p < 0.05). Results:Vibrationdid not lead to any significant difference in the µSBS values of Wave, Wave HV, and Grandio Flow µSBS values (P=0.690, P=1.000 and P=0.947, respectively). No significant difference was found between flowable composites in terms of micro shear bond strength to enamel (p > 0.05). Conclusions: The application of ultrasonicvibration might not be advantageous in terms of improving the shear bond strength of flowable composites to enamel. (AU)


Objetivo: Este estudo teve como objetivo avaliar a influência de microcisalhamento com efeito de vibração na resistência de união (µSBS) de compósito fluido ao esmalte. Material e Métodos: Sessenta dentes pré-molares humanos extraídos não cariados foram coletados e divididos aleatoriamente em seis grupos (n = 10) após serem desgastados para produzir uma superfície lisa e plana: Compósitos fluidos [Wave (SDI), Wave HV (SDI) e Grandioflow (Voco)] foram usados como agentes adesivos sem e com vibração através de um aparelho ultrassônico (Mini Piezon, EMS, Switzerland). Uma resina composta, com diâmetro interno de 0,7 mm e peso de 1 mm, foi polimerizada no substrato. Os espécimes de µSBS foram submetidos a teste de microtração (Bisco, USA) em uma velocidade de 0.5 mm/min. Os valores de resistência adesiva foram analisados através de testes de ANOVA a um critério e de Tukey post hoc (p < 0.05). Resultados: A vibração não levou a nenhuma diferença significativa nos valores de µSBS entre Wave, Wave HV, e Grandio Flow (P=0.690, P=1.000 e P=0.947, respectivamente). Não foi encontrada nenhuma diferença significativa entre os compósitos fluidos quanto à resistência de união ao esmalte quando sob microcisalhamento (p >0.05). Conclusões: A aplicação de vibração ultrassônica pode não ser vantajosa para uma melhora na resistência adesiva de compósitos fluidos ao esmalte frente a cisalhamento. (AU)


Subject(s)
Humans , Vibration , Bicuspid , Composite Resins , Dental Enamel
7.
ABC., imagem cardiovasc ; 34(3)2021. ilus, graf
Article in Portuguese | LILACS | ID: biblio-1292127

ABSTRACT

Resumo Historicamente, o papel do ecocardiograma de estresse físico no manejo da cardiomiopatia hipertrófica tem sido negligenciado na prática clínica, de acordo com a análise das diretrizes do American College of Cardiology/ American Heart Association de 2002, que recomendavam cautela no uso dessa metodologia, em portadores de cardiomiopatia hipertrófica, devido ao risco de possível ocorrência tanto de arritmia cardíaca, como de colapso hemodinâmico no esforço. Atualmente, o estresse físico na cardiomiopatia hipertrófica integra a avaliação rotineira de pacientes sintomáticos com ou sem gradiente da via de saída do ventrículo esquerdo < 50 mmHg, em repouso. Para este grupo, é um método seguro e confiável para medir o gradiente da via de saída do ventrículo esquerdo durante o esforço e sólido diferenciador de pacientes com cardiomiopatia hipertrófica não obstrutivos (gradiente ausente, tanto em repouso quanto no esforço) daqueles com gradientes lábeis (gradiente ausente no repouso e presente no esforço). Portanto, na avaliação da cardiomiopatia hipertrófica, o estresse físico é igualmente útil na quantificação do grau de regurgitação mitral, nas alterações da contratilidade segmentar do ventrículo esquerdo e na avaliação da função diastólica do ventrículo esquerdo, diante do esforço, sendo capaz de predizer o futuro desenvolvimento de sintomas de insuficiência cardíaca. O método é também importante na determinação das diferentes estratégias de tratamento para cada paciente, desde a miomectomia cirúrgica ou a ablação septal alcoólica, para aqueles com gradiente lábil, com sintomas limitantes e refratários ao tratamento medicamentoso versus transplante cardíaco para aqueles sem gradiente.(AU)


Subject(s)
Humans , Male , Adult , Middle Aged , Atrial Fibrillation/complications , Hypertrophy, Left Ventricular/congenital , Cardiomyopathy, Hypertrophic, Familial , Heart Failure/complications , Mitral Valve , Stress, Physiological , Vibration/adverse effects , Magnetic Resonance Spectroscopy/methods , Ergometry/methods , Death, Sudden, Cardiac/etiology , Echocardiography, Stress/methods , Electrocardiography/methods , Ablation Techniques
8.
CoDAS ; 33(3): e20200095, 2021. tab, graf
Article in English | LILACS | ID: biblio-1249625

ABSTRACT

ABSTRACT Purpose To evaluate and compare the parameters of Digital kymography obtained through the High-speed Videolaryngoscopy of women without laryngeal disorders, of women with vocal fold nodules and of women with vocal cysts. Methods A cross-sectional observational study in which 60 women aged 18 years and 45 years were selected. Three study groups were formed: 20 women without laryngeal disorder forming the control group (Group 1), 20 women with diagnosis of vocal fold nodules forming Group 2 and 20 women with diagnosis of vocal cysts forming Group 3. Subsequently the participants were evaluated by High-speed Videolaryngoscopy for analysis and comparison of laryngeal images using Digital kymography. The laryngeal parameters processed by the program KIPS® were: minimum, maximum and mean opening; dominant amplitude of the left and right vocal folds; dominant frequency of the right and left vocal folds; and close. Results The analysis of Digital kymography suggests that the presence of the vocal fold nodules and the vocal cysts tend to restrict more to the maximum and minimum opening of the vocal fold and the dominant amplitude of the opening variation in the middle region of the glottis. Conclusion Digital kymography parameters were similar in the presence of vocal fold nodules and vocal cysts lesions.


RESUMO Objetivo Avaliar e comparar os parâmetros da videoquimografia digital obtidos pela videolaringoscopia de alta velocidade de mulheres sem alterações laríngeas, de mulheres com nódulos de prega vocal e de mulheres com cistos vocais. Método Estudo observacional transversal, no qual foram selecionadas 60 mulheres com idade entre 18 e 45 anos. Três grupos foram formados: 20 mulheres sem alterações laríngeas formando o grupo controle (Grupo 1), 20 mulheres com diagnóstico de nódulos nas pregas vocais formando o Grupo 2 e 20 mulheres com diagnóstico de cistos vocais formando o Grupo 3. Posteriormente, os participantes foram avaliados por Videolaringoscopia de alta velocidade para análise e comparação de imagens da laringe usando videoquimografia digital. Os parâmetros videoquimográficos avaliados pelo programa KIPS® foram: aberturas mínima, máxima e média; amplitudes da prega vocal direita e esquerda; frequências da abertura da prega vocal direita e esquerda; e fechamento. Resultados A análise da videoquimografia digital sugere que a presença dos nódulos e dos cistos de pregas vocais tendem a restringir a abertura máxima e média da prega vocal e a amplitude dominante da variação de abertura na região média da glote. Conclusão Os parâmetros da videoquimografia digital foram semelhantes na presença de nódulos nas pregas vocais e lesões de cistos vocais.


Subject(s)
Humans , Female , Adolescent , Phonation , Cysts/diagnostic imaging , Vibration , Video Recording , Vocal Cords/diagnostic imaging , Cross-Sectional Studies , Kymography
9.
J. oral res. (Impresa) ; 9(5): 405-413, oct. 31, 2020. ilus, graf, tab
Article in English | LILACS | ID: biblio-1179032

ABSTRACT

Introduction: This study evaluated the influence of sonic vibration and thermocycling on the bond strength of fiberglass posts using conventional dual-cured and self-adhesive resin cements. Material and Methods: Ninety-six single-rooted endodontically treated teeth were divided randomly into eight groups according to the cement used (dual-cured or self-adhesive resin cement), use of sonic vibration during post accommodation, and aging conditions (24h in distilled water or 5,000 thermal cycles). The fiberglass posts (White Post DC1, FGM) were cleaned with alcohol, treated with silane and cemented with dual-cured (Allcem Core, FGM) or with self-adhesive resin cement (seT, SDI). For groups in which sonic vibration was used, the posts were accommodated, and sonic vibration was applied for 10 s using a special tip placed on top of the post (Sonic Smart Device, FGM). Pull-out tests were performed after storage in distilled water for 24h at 37°C or after thermocycling (5000 cycles, at 5°C and 55°C). The results were evaluated using three-way ANOVA and Tukey's test (α=0.05). Results: Significant differences were not observed between the bond strengths of dual-cured (87.93±41.81 N) and self-adhesive cement (82.53±41.43 N). Bond strength for the sonic vibration groups (100.36±42.35 N) was significantly higher than for groups without sonic vibration (70.13±34.90 N). There were significant differences between specimens subjected to thermocycling (98.33±39.42 N) and those stored for 24h in distilled water (72.16±39.67 N). Conclusion: It can be concluded that both sonic vibration and thermocycling significantly improved bond strength of fiberglass posts with the two evaluated resin cements.


Introducción: Este estudio evaluó la influencia de la vibración sónica y el termociclado en la fuerza de unión de los postes de fibra de vidrio utilizando cementos de resina autoadhesivos y de curado dual convencionales Material y Métodos: Se dividieron aleatoriamente noventa y seis dientes tratados endodónticamente de raíz única en ocho grupos según el cemento utilizado (cemento de resina de curado dual o autoadhesivo), el uso de vibración sónica durante la acomodación posterior y las condiciones de envejecimiento (24 horas agua destilada o 5.000 ciclos térmicos). Los postes de fibra de vidrio (White Post DC1, FGM) se limpiaron con alcohol, se trataron con silano y se cementaron con cemento de curado dual (Allcem Core, FGM) o con cemento de resina autoadhesivo (seT, SDI). Para los grupos en los que se utilizó vibración sónica, se acomodaron los postes y se aplicó la vibración sónica durante 10 s utilizando una punta especial colocada en la parte superior del poste (Sonic Smart Device, FGM). Las pruebas de extracción se realizaron después del almacenamiento en agua destilada durante 24 horas a 37ºC o después del termociclado (5000 ciclos, a 5ºC y 55ºC). Los resultados se evaluaron mediante ANOVA de tres vías y la prueba de Tukey (α = 0.05). Resultados: No se observaron diferencias significativas entre las resistencias de adhesión del cemento de curado dual (87,93 ± 41,81 N) y el cemento autoadhesivo (82,53 ± 41,43 N). La fuerza de unión para los grupos de vibración sónica (100,36 ± 42,35 N) fue significativamente mayor que para los grupos sin vibración sónica (70,13 ± 34,90 N). Hubo diferencias significativas entre los especímenes sometidos a termociclado (98,33 ± 39,42 N) y los almacenados durante 24 h en agua destilada (72,16 ± 39,67 N). Conclusión: Se puede concluir que tanto la vibración sónica como el termociclado mejoraron significativamente la fuerza de unión de los postes de fibra de vidrio con los dos cementos de resina evaluados.


Subject(s)
Humans , Vibration , Post and Core Technique/instrumentation , Resin Cements/chemistry , Flexural Strength , Glass , Sonication/methods , Tooth Root , Dental Bonding , Dentin-Bonding Agents , Dentin/chemistry , Ultrasonic Waves
10.
Rev. Ciênc. Méd. Biol. (Impr.) ; 19(2): 311-317, set 24, 2020. fig, ilus
Article in Portuguese | LILACS | ID: biblio-1358279

ABSTRACT

Introdução: fraturas ósseas extensas representam grande causa de morbidade e geram custos para o serviço de saúde. A vibração de baixa magnitude e alta frequência foi proposta como um tratamento alternativo para aumentar a massa óssea. Objetivo: Avaliar histomorfologicamente o reparo inicial de defeitos ósseos críticos após aplicação de ondas mecânicas vibratórias Metodologia: foram utilizados 10 Rattus norvegicus. Confeccionou-se defeitos críticos de 8,5 mm de diâmetro na calvária dos ratos. Os animais foram distribuídos em dois grupos: Grupo Controle de Defeito Ósseo (GCDO) e Grupo Experimental de Vibração Imediata (GEVI). Animais do GEVI foram submetidos a ondas vibratórias de 60 Hz e aceleração vertical de 0,3 g; elas foram aplicadas três vezes/ semana, durante vinte minutos. Após quinze dias do ato operatório, os animais foram eutanasiados para a mensuração da extensão do defeito. Considerando que estes defeitos tinham o mesmo diâmetro inicial, admitiu-se como indicador indireto de deposição osteóide, a redução da extensão linear final dos mesmos. Resultados: observou-se neoformação de matriz osteoide, restrita às bordas ósseas, em ambos os grupos. A média de extensão linear, em milímetros, do defeito ósseo do GEVI foi de 5,83 (DP=0,79) e no GCDO, foi de 6,62 (DP= 0,63). Não houve diferença estatisticamente significante entre as médias (U=8,00, z=-1,604, p=0,132). Conclusão: evidenciou-se resposta osteogênica a partir da utilização da terapêutica vibratória, contudo de forma estatisticamente não-significante. Deste modo, o presente estudo demonstrou que a utilização das ondas vibratórias não favoreceu um reparo ósseo estatisticamente significante, no período e regime vibratório estudados.


Introduction: extensive bone fractures represent a major cause of morbidity and generate costs for the health service. Vibration of low magnitude and high frequency has been proposed as an alternative treatment to increase bone mass. Objective: to evaluate histomorphologically the initial repair of critical bone defects after application of vibrating mechanical waves. Methodology: 10 Rattus norvegicus were used. Critical defects of 8.5 mm in diameter were made in the calvaria of the rats. The animals were divided into two groups: Bone Defect Control Group (GCDO) and Experimental Immediate Vibration Group (GEVI). GEVI animals were submitted to 60 Hz vibrating waves and 0.3 g vertical acceleration; they were applied three times/week, for twenty minutes. Fifteen days after the surgery, the animals were euthanized to measure the extent of the defect. Considering that these defects had the same initial diameter, a reduction in their final linear extension was admitted as an indirect indicator of osteoid deposition. Results: neoformation of an osteoid matrix, restricted to bone borders, was observed in both groups. The mean linear extension, in millimeters, of the GEVI bone defect was 5.83 (SD = 0.79) and in the GCDO, it was 6.62 (SD = 0.63). There was no statistically significant difference between the means (U = 8.00, z = -1.604, p = 0.132). Conclusion: an osteogenic response was evidenced from the use of vibratory therapy, however in a statistically non-significant way. Thus, the present study demonstrated that the use of vibrating waves did not favor a statistically significant bone repair, during the studied period and vibration regime


Subject(s)
Animals , Male , Rats , Osteogenesis , Rats , Vibration , Bone Regeneration , Rats, Wistar , Fractures, Bone , Animal Experimentation
11.
Int. j. odontostomatol. (Print) ; 14(2): 230-235, June 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1090679

ABSTRACT

La estabilidad primaria es un requisito importante para la supervivencia y éxito de los implantes durante la osteointegración. En los últimos años, los implantes inmediatos postextracción han demostrado ser una opción de tratamiento exitosa y predecible para la reposición de dientes con mal pronóstico, pero surge la duda de si dichos implantes alcanzan valores de estabilidad primaria comparables a aquellos colocados en hueso maduro. Comparar la estabilidad primaria de implantes inmediatos colocados en alveolos postextracción con la de implantes colocados en hueso maduro. Se llevó a cabo un estudio clínico retrospectivo, con los datos recogidos sobre 175 implantes, colocados en 175 pacientes. Todos los implantes colocados pertenecían al modelo Essential Cone (Klockner Implant System) y se dividieron en dos grupos: implantes inmediatos (Grupo A, n=31) e implantes colocados en hueso maduro (Grupo B, n=144). La estabilidad primaria de todos los implantes se midió mediante torque de inserción y análisis de frecuencia de resonancia con Osstell ISQ. No se encontraron diferencias estadísticamente significativas respecto a la estabilidad medida a través del torque de inserción (26,29+10,07 Vs 25,76+9,72 N/cm) pero sí que se encontraron diferencias significativas en la medida de la estabilidad primaria mediante AFR, siendo inferiores los valores correspondientes a los implantes colocados en los alveolos post exodoncia (60,74 ± 6,17 en sentido VL y 62,19 ± 7.64 en sentido MD frente a 68,34 ± 6.26 en sentido VL y 69,29 ± 7.98 en sentido MD obtenidos en los implantes colocados en hueso maduro). El torque de inserción de los implantes inmediatos es similar al de los implantes colocados en hueso maduro, pero sus valores ISQ son significativamente inferiores, lo que demuestra un mayor grado de micromovimiento, y por consiguiente, un mayor riesgo de fracaso durante el período de osteointegración.


Primary stability is an important requirement for the survival and success of implants during osseointegration. In recent years, immediate post-extraction implants have proven to be a successful and predictable treatment option for the replacement of teeth with a poor prognosis, but the question arises as to whether these implants reach primary stability values comparable to those placed in mature bone. The objective of the study was to compare the primary stability of immediate implants placed in post-extraction alveoli with that of implants placed in mature bone. A retrospective clinical study was carried out, with data collected on 175 implants, placed in 175 patients. All implants placed belonged to the Essential Cone model (Klockner Implant System) and were divided into two groups: immediate implants (Group A, n = 31) and implants placed in mature bone (Group B, n = 144). The primary stability of all implants was measured by insertion torque and resonance frequency analysis with Osstell ISQ. No statistically significant differences were found regarding the stability measured through the insertion torque (26.29 + 10.07 Vs 25.76 + 9.72 N / cm) but significant differences were found in the measurement of primary stability by means of AFR, the values corresponding to implants placed in the post-exodontic alveoli being lower (60.74 ± 6.17 in the VL direction and 62.19 ± 7.64 in the MD direction versus 68.34 ± 6.26 in the VL direction and 69.29 ± 7.98 in the MD direction obtained in implants placed in mature bone). The insertion torque of immediate implants is similar to that of implants placed in mature bone, but their ISQ values are significantly lower, which demonstrates a higher degree of micromotion, and therefore, a greater risk of failure during the period of osseointegration.


Subject(s)
Dental Prosthesis Retention , Dental Implantation, Endosseous/methods , Tooth Extraction , Vibration , Case-Control Studies , Retrospective Studies , Osseointegration , Torque , Immediate Dental Implant Loading , Resonance Frequency Analysis
12.
Arq. bras. med. vet. zootec. (Online) ; 72(2): 305-311, Mar./Apr. 2020. ilus, tab
Article in English | LILACS, VETINDEX | ID: biblio-1128167

ABSTRACT

The effects of two vibration platform (VP) exercise protocols on stifle and rectal temperatures were evaluated. Eleven animals participated in two exercise protocols, different in duration in each exercise. Exercise protocol 1 (EP1) took 30 seconds and EP2, 60 seconds, with different vibratory levels in both cases (L1 = acceleration ≅ 1g, L4 = acceleration ≅ 2.5g, and L7 = acceleration ≅ 5g). The animals were evaluated before and 1 minute after the exercise, using infrared thermography to obtain stifle temperatures. The rectal temperature (RT) was also checked at each moment. The dogs had higher stifle temperatures in EP1 at all vibratory levels compared to the time before the exercise; EP2 resulted in higher temperature only at maximum vibration intensity (L7). Increase in TR was observed only in EP2. The results suggested that the short duration protocol (EP1) increased the muscular and peripheral vascular activities of the joint, regardless of the vibration intensity. The long duration protocol (EP2) with maximum vibration intensity increased the RT, demonstrating activity beyond the stifle muscle group. It is concluded that exercises on the VP can be used as complementary therapy for low-impact muscle activity in dogs and may be adequate for efficient energy consumption.(AU)


Foram avaliados os efeitos de dois protocolos de exercício em plataforma vibratória (PV) sobre as temperaturas dos joelhos e retais. Onze animais participaram de dois protocolos de exercício, diferentes na duração de cada exercício. O protocolo de exercício 1 (PE1) foi de 30 segundos e o PE2 foi de 60 segundos, com diferentes níveis vibratórios em ambos (L1 = aceleração ≅ 1g; L4 = aceleração ≅ 2,5g; e L7 = aceleração ≅ 5g). Os animais foram avaliados antes e um minuto após os exercícios, por meio de termografia infravermelha para a obtenção das temperaturas dos joelhos. A temperatura retal (TR) foi aferida em cada momento. Os cães apresentaram temperaturas dos joelhos mais elevadas em PE1, em todos os níveis vibratórios, em comparação a antes do exercício; o PE2 resultou em temperatura mais alta apenas na intensidade máxima de vibração (L7). Aumento na TR foi observado apenas no PE2. Os resultados sugerem que o protocolo de curta duração (PE1) aumentou as atividades muscular e vascular periférica da articulação, independentemente da intensidade da vibração; o protocolo de longa duração (PE2) com intensidade máxima de vibração aumentou a TR demonstrando atividade além do grupo muscular do joelho. Conclui-se que os exercícios na PV podem ser utilizados como terapia complementar para atividade muscular de baixo impacto em cães e pode ser adequada para o consumo eficiente de energia.(AU)


Subject(s)
Animals , Dogs , Perfusion/veterinary , Rectum/physiology , Vibration , Knee Joint/blood supply , Body Temperature , Thermography/veterinary , Exercise
13.
Fisioter. Bras ; 21(1): 77-85, mar 8, 2020.
Article in English | LILACS | ID: biblio-1282728

ABSTRACT

Abstract Introduction: Several technologies have been developed and optimized for the treatment of unaesthetic disorders. Among them is the oscillatory vibration therapy, a novel form of treatment based on the mechanical and physiological fundamentals of the vibration platform. Objective: The present study evaluated the efficacy of the oscillatory vibration therapy in the improvement of body contour remodeling and in the aspect of cellulite in women. Methods: This is a prospective longitudinal comparative study, in which the following evaluation tools are used: anthropometry, perimetry, adipometry, evaluation of skin viscoelasticity with Cutometer®, evaluation of the thickness of the hypodermis with diagnostic ultrasound and analysis of severity of cellulite (CSS). The evaluations occurred at the start and 1 week after the end of ten oscillatory vibration therapy. The results were analyzing using a paired student's t-test with interval confidence of 95% (PValue <0.05). Results: Thirty women took part in the research, with age of 33 ± 9 years, weight of 62 ± 11 kg, height of 1.66 ± 0.06 m, BMI of 22 ± 2 kg/m2. The measurements of perimetry, adipometry, analysis of subcutaneous tissue thickness by means of diagnostic ultrasound and analysis of skin viscoelasticity did not present significant alterations. However, the CSS variable of the right gluteus (7.3 ± 1.8 to 5.8 ± 1.6 ≤ 0.0001), left gluteus (7.2 ± 1.9 to 5.8 ± 1.6= 0.0001), right thigh (6.9 ± 1.9 to 5.6 ± 1.4 = 0.0004), left thigh (6.9 ± 1.9 to 5.6 ± 1.3 = 0.0004) and Celluqol® (59 ± 16 to 49 ± 16 = 0.022) presented significant difference. Conclusion: The multi-directional oscillatory vibration therapy is an effective and efficient therapy for the treatment of cellulite; however, for the treatment of body remodeling, it must be further evaluated and studied. (AU)


Introdução: Várias tecnologias vêm sendo desenvolvidas e otimizadas para o tratamento das afecções inestéticas. Dentre elas está a terapia vibro-oscilatória, uma nova forma de tratamento baseada na fundamentação mecânica e fisiológica da plataforma vibratória Objetivo: O presente estudo avaliou a eficácia da terapia vibro-oscilatória para melhora do remodelamento corporal e aspecto de celulite em mulheres. Métodos: Trata-se de um estudo clínico longitudinal prospectivo e comparativo, no qual se utilizaram as seguintes ferramentas de avaliação: antropometria, perímetria, adipometria, avaliação da viscoelasticidade da pele com Cutometer®, avaliação da espessura da hipoderme com ultrassom diagnóstico e análise da escala de severidade da celulite (CSS). As avaliações ocorreram no início e após 1 semana de término das dez sessões da terapia vibro-oscilatória. As análises estatísticas foram realizadas com o software Bioestat 5.0, utilizando o teste de normalidade de Lilliefor (P-valor > 0,05), teste paramétrico e teste T-Student da amostra pareada. Resultados: Trinta mulheres participaram da pesquisa, com média de idade de 33 ± 9 anos, peso médio de 62 ± 11 kg, altura média de 1,66 ± 0,06 metros, IMC médio de 22 ± 2 kg/m2 . As medidas de perímetria, adipometria, análise da espessura do tecido subcutâneo por meio de ultrassom diagnóstico e análise da viscoelasticidade da pele não apresentaram alterações significativas. Entretanto as variáveis de CSS glúteo direito (7,3 ± 1,8 para 5,8 ± 1,6 ≤ 0,0001), glúteo esquerdo (7, 2 ± 1,9 para 5,8 ± 1,6 = 0,0001), coxa direita (6,9 ± 1,9 para 5,6 ± 1,4 = 0,0004), coxa esquerda (6.9 ± 1,9 para 5,6 ± 1,3 = 0,0004) e Celluqol® (59 ± 16 para 49 ± 16 = 0,022), apresentaram diferença significativa. Conclusão: A terapia vibro-oscilatória multidirecional é uma terapia efetiva e eficaz para o tratamento da celulite, porém para o tratamento de remodelamento corporal ela deve ser mais bem avaliada e estudada. (AU)


Subject(s)
Humans , Cellulite , Body Contouring , Vibration , Esthetics
14.
Article in Chinese | WPRIM | ID: wpr-781776

ABSTRACT

OBJECTIVE@#To compare the therapeutic effect of thunder-fire moxibustion combined with vibration training and simple vibration training on low back pain of primary osteoporosis by 's modulus of ultrasonic wave, and seek an objective evaluating method.@*METHODS@#A total of 60 patients were randomized into an observation group and a control group, 30 cases in each one. The patients in the two groups were treated with vibration training using whole body vibration treatment bed. In the observation group, thunder-fire moxibustion was applied at Yaoyangguan (GV 3), Mingmen (GV 4), Ganshu (BL 18), Shenshu (BL 23) and Dachangshu (BL 25). The treatment was given once every other day, 3 times a week for 4 weeks. The visual analogue score (VAS), real-time shear wave elastography (RTSWE) and medical outcomes study 36-item short-form hearth survey (SF-36) were used to evaluate pain intensity, multifidus muscle tone ('s modulus) and quality of life before treatment, after 4-week treatment and 1 month after treatment.@*RESULTS@#Compared before treatment, the VAS scores, 's modulus of multifidus muscle and 5 dimensions of SF-36 (physical condition, body pain, general health, social function and mental health) after 4-week treatment and 1 month after treatment were significantly improved in the two groups (all <0.05), the physiological role in the observation group after 4-week treatment and 1 month after treatment were improved (both <0.05). In the observation group, the VAS scores, 's modulus of multifidus muscle and 3 dimensions of SF-36 (physiological role, body pain and general health) after 4-week treatment and 1 month after treatment were superior to the control group (all <0.05).@*CONCLUSION@#The therapeutic effect of thunder-fire moxibustion combined with vibration training is superior to simple vibration training in relieving low back pain intensity and multifidus muscle tone, and improving quality of life for primary osteoporosis. RTSWE technique can be an objective examination method to evaluate pain.


Subject(s)
Acupuncture Points , Humans , Low Back Pain , Therapeutics , Moxibustion , Osteoporosis , Quality of Life , Treatment Outcome , Vibration
15.
Article in Chinese | WPRIM | ID: wpr-828163

ABSTRACT

In order to reduce the impact caused by the contact between the foot and the ground when wearing the lower extremity exoskeleton under the condition of high load, this paper proposed an exoskeleton foot mechanism for improving the foot comfort, and optimized the key index of its influence on the comfort. Firstly, the physical model of foot mechanism was established based on the characteristics of foot stress in gait period, and then the mathematical model of vibration was abstracted. The correctness of the model was verified by the finite element analysis software ANSYS. Then, this paper analyzed the influence of vibration parameters on absolute transmissibility based on vibration mathematical model, and optimized vibration parameters with MATLAB genetic algorithm toolbox. Finally, this paper took white noise to simulate the road elevation as the vibration input, and used the visual simulation tool Simulink in MATLAB and the vibration equation to construct the acceleration simulation model, and then calculated the vibration weighted root mean square acceleration value of the foot. The results of this study show that this foot comfort mechanism can meet the comfort indexes of vibration absorption and plantar pressure, and this paper provides a relatively complete method for the design of exoskeleton foot mechanism, which has reference significance for the design of other exoskeleton foot and ankle joint rehabilitation mechanism.


Subject(s)
Acceleration , Ankle Joint , Biomechanical Phenomena , Exoskeleton Device , Finite Element Analysis , Foot , Gait , Humans , Lower Extremity , Models, Theoretical , Vibration
17.
Article in Chinese | WPRIM | ID: wpr-879209

ABSTRACT

The purpose of this study was to investigate the effect of low-magnitude vibration on osteogenesis of osteoblasts in ovariectomized rats with osteoporosis via estrogen receptor α(ERα). The mRNA expression of osteogenic markers were examined with qRT-PCR, based on which the optimal vibration parameter for promoting osteogenesis was determined (45 Hz × 0.9 g, g = 9.8 m/s


Subject(s)
Animals , Cell Differentiation , Estrogen Receptor alpha/genetics , Female , Osteoblasts , Osteogenesis , Osteoporosis , Ovariectomy , Rats , Vibration
18.
Acta Physiologica Sinica ; (6): 643-650, 2020.
Article in Chinese | WPRIM | ID: wpr-878209

ABSTRACT

This paper discusses the short-term memory of vibro-tactile perception of human fingertips. By using a self-developed vibro-tactile expression device, a recall experiment was firstly carried out among 20 subjects aged 20-30 (10 males and 10 females) to discover the memory span about the vibro-tactile perception of human fingertips. Within this memory span, a cognitive experiment analyzing the recognition accuracy and the reaction time was carried out. The results showed: (1) The vibro-tactile memory span of human fingertip is 4 ± 1; (2) The vibro-tactile memory span increases as the discrete intensity between vibration stimuli increases; (3) Too long or too short vibration duration will reduce the vibro-tactile memory span, and the optimal vibration duration for men is 400 ms, for women is 300 ms; (4) The more the number of vibration stimuli is perceived by the human fingertip, the lower the recognition accuracy and the longer the reaction time it needs; (5) Compared with the vibration stimuli in disorder, people are more likely to remember the vibration stimuli in increasing/decreasing order; (6) The information extraction mechanism of the short-term memory about fingertip vibro-tactile perception bases a point to point scanning process among these stimuli. These results help to understand the human fingertip tactile characteristics and provide a physiological basis for the study of tactile feedback technologies.


Subject(s)
Adult , Female , Fingers , Humans , Male , Memory, Short-Term , Touch , Touch Perception , Vibration , Young Adult
19.
CoDAS ; 32(4): e20190068, 2020. tab, graf
Article in Portuguese | LILACS | ID: biblio-1055911

ABSTRACT

RESUMO Objetivo Descrever a emissão de superagudos em sopranos profissionais por meio da avaliação perceptivo-auditiva da voz e do autorrelato das cantoras. Método Cinco sopranos profissionais executaram o trecho de uma ópera de Bellini no qual havia a emissão de uma nota superaguda. A avaliação perceptivo-auditiva foi realizada por seis avaliadores (três fonoaudiólogos e três professores de canto) que consideraram brilho, loudness, metal, vibrato, soprosidade e ressonância em uma escala visual-analítica, tendo como base a emissão aguda de cada uma das cantoras. Após a gravação, as cantoras responderam a um questionário proprioceptivo sobre as sensações físicas durante a produção dos superagudos. Foi realizada uma análise inferencial dos dados da avaliação perceptivo-auditiva e transcrição ortográfica resumida do autorrelato das cantoras. Resultados Na análise perceptivo-auditiva, a emissão superaguda foi caracterizada por presença de brilho, loudness, metal, vibrato e ressonância anteriorizada percebida por fonoaudiólogos e professores de canto. No relato proprioceptivo, todas as cantoras referiram elevação de laringe e necessidade de utilização do apoio respiratório para emitir a nota superaguda. Conclusão Os superagudos foram caracterizados por uma emissão vocal brilhante, loudness aumentada, metálica, com vibrato, com pouca ou nenhuma soprosidade, com sensação de elevação da laringe e necessidade de apoio respiratório.


ABSTRACT Purpose To describe the emission of upper high notes by professional sopranos by means of the auditory-perceptual evaluation of the singers' voices and self-reports. Methods Five professional sopranos performed an excerpt from a Bellini opera which involved the emission of an upper high note. The auditory-perceptual evaluation was carried out by three speech-language therapists and three singing teachers, who considered brightness, loudness, metal quality, vibrato, breathiness, and resonance on a visual-analytical scale, based on each singer's emission of high notes. After the recording, the singers were asked to answer a proprioceptive questionnaire on the physical sensations that they had as they emitted upper high notes. An inferential analysis of the data from the auditory-perceptual evaluation was conducted, and the singers' self-reports were summarized and then orthographically transcribed. Results In the auditory-perceptual analysis, the emission of upper high notes was characterized according to the presence of brightness, loudness, metal quality, vibrato, and anterior resonance, as perceived by speech-language therapists and singing teachers. In the proprioceptive report, all singers reported laryngeal elevation and a need to use respiratory support in order to emit upper high notes. Conclusion Upper high notes are characterized by a bright vocal emission, enhanced loudness, with a metallic quality and vibrato, little or no breathiness, accompanied by a sensation of laryngeal elevation and a need for respiratory support.


Subject(s)
Humans , Adult , Auditory Perception/physiology , Speech Perception/physiology , Voice/physiology , Singing/physiology , Vibration , Voice Quality , Voice Disorders/physiopathology , Larynx/physiology , Occupations
20.
Electron. j. biotechnol ; 42: 42-48, Nov. 2019. graf, tab, ilus
Article in English | LILACS | ID: biblio-1087459

ABSTRACT

Background: Foods including probiotics are considered "functional foods." As an alternative to dairy products, we investigated the behavior of Lactobacillus casei when exposed to low-pH fruit juice. Juices of fruits such as pineapple, raspberry, and orange were assessed. Free and microencapsulated forms of L. casei were compared, and the viability of the probiotic was evaluated under storage at 4°C for 28 d. Microbiological analyses were carried out to ensure a safe and healthy product for consumers who look for foods with probiotics from sources other than dairy. Results: Low pH affected L. casei survival during storage depending on the type of fruit juice. In the case of pineapple juice, some microcapsules were broken, but microcapsules recovered at the end of the storage period had 100% viability (2.3 × 107 CFU/g spheres). In the case of orange juice, more than 91% viability (5.5 × 106 CFU/g spheres) was found. In raspberry juice, viability decreased rapidly, disappearing at the end of the storage period, which was caused by the absorption of high concentrations of anthocyanin inside microcapsules more than low pH. Conclusion: Low pH affected the survival of L. casei under refrigeration; even when they were microencapsulated, acidic conditions impacted their viability. Although pH affects viability, its value is very sensitive and will depend on the type of fruit juice and its composition. Some fruit juices contain compounds used as substrates for Lactobacillus and other compounds with antimicrobial effects.


Subject(s)
Microbial Viability , Fruit and Vegetable Juices , Lactobacillus casei/growth & development , Vibration , Cold Temperature , Probiotics , Alginates/chemistry , Food Storage , Pasteurization , Hydrogen-Ion Concentration , Anthocyanins
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