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1.
Angle Orthod ; 91(1): 22-29, 2021 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-33339047

RESUMO

OBJECTIVES: To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. MATERIALS AND METHODS: The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. RESULTS: The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. CONCLUSIONS: The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.


Assuntos
Má Oclusão de Angle Classe II , Desenho de Aparelho Ortodôntico , Adolescente , Cefalometria , Feminino , Humanos , Masculino , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Maxila , Técnicas de Movimentação Dentária
2.
Angle Orthod ; 2020 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-33289781

RESUMO

OBJECTIVES: To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. MATERIALS AND METHODS: The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. RESULTS: The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. CONCLUSIONS: The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.

3.
J Clin Pediatr Dent ; 44(3): 202-208, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32644891

RESUMO

Objectives: The aim of study was to evaluate skeletodental and soft tissue treatment effects and the amount of maxillary molar distalization with modified C-palatal plates vs. Greenfield molar distalizer appliances in adolescents. Study design: The samples consisted of pre- and posttreatment lateral cephalograms collected from 39 patients with Class II malocclusion. The MCPP group was comprised of 21 patients (mean age: 11.7 ± 1.3 years) treated with MCPP appliances while the GMD group included 18 patients (mean age: 11.2 ± 0.9 years) treated with GMD. Fixed orthodontic treatment started with the distalization process in both groups. From each cephalograpm, twenty-nine variables were measured for analysis and then the two groups were compared. Descriptive statistics, a paired t-test, and multivariate analysis of variance were performed to compare the treatment effects within and between the groups. Results: There was significant treatmentrelated change in the sagittal position of the maxilla and the mandible within each group. However, there were no statistically significant inter-group differences. The mean maxillary first molar distalization was 3.96 mm in the MCPP group vs. 2.85 mm in the GMD group. Both groups showed minimal distal tipping, but the maxillary incisors were significantly extruded by 3.04 ± 0.89 mm (P < .001) in GMD group. There was no significant difference in treatment duration between the groups. Conclusions: The maxillary first molars of both the MCPP and GMD groups were effectively distalized and there were significant skeletal changes in the maxilla. However, the maxillary incisors were significantly extruded in the GMD group.


Assuntos
Má Oclusão de Angle Classe II , Procedimentos de Ancoragem Ortodôntica , Adolescente , Cefalometria , Criança , Humanos , Maxila , Dente Molar , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Técnicas de Movimentação Dentária
4.
J Physiol Anthropol ; 32: 15, 2013 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-24112302

RESUMO

BACKGROUND: Despite increasing attention and a growing volume of research data, little physiological evidence is available on the benefits of horticultural activity and the different effects on individuals. Therefore, the aim of the present study was to investigate the physiological effects of horticultural activity and to examine how differences in personality alter these effects. RESULTS: The effects of transplanting real flowers (horticultural activity) and handling artificial flowers (control activity) on human physiological activity were compared. On the first day, eight participants engaged in horticultural activity and another eight in the control activity. On the second day, participants switched roles. Participants' physiological conditions during each activity were assessed by measuring the heart rate and heart rate variability (HRV). Psychological responses, which were measured using a semantic differential rating scale, showed that the horticultural activity promoted comfortable, soothed, and natural feelings, compared to the control activity. Analysis of physiological responses using two-way repeated measures analysis of variance (ANOVA) revealed that sympathetic nervous activity significantly decreased in the late time period (11 to 15 minutes) of horticultural activity only in the type A group. CONCLUSIONS: This study supports the fact that the horticultural activity can enhance psychological and physiological relaxation effects, although these physiological effects can differ among individuals with different personalities.


Assuntos
Horticultura Terapêutica/métodos , Relaxamento/fisiologia , Relaxamento/psicologia , Adulto , Análise de Variância , Chrysanthemum , Frequência Cardíaca/fisiologia , Humanos , Masculino , Personalidade/fisiologia , Adulto Jovem
5.
Arch Pharm Res ; 33(12): 1937-42, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21191758

RESUMO

By various chromatographic methods, three flavonoids, (2S)-naringenin (1), isorhamnetin 3-O-(2-O-α-L-rhamnopyranosyl) ß-D-glucopyranoside (2), typhaneoside (3), and two sterol glycosides, ß-sitosterol-3-O-(6-octadecanoyl) ß-D-glucopyranoside (4) and ß-sitosterol-3-O-(6-octadeca-9Z,12Z-dienoyl) ß-D-glucopyranoside (5), were isolated from the pollen of Typha angustata. Their structures were determined on the basis of spectroscopic analyses. The flavonoids (1-3) were evaluated for their effects on the viability and proliferation of rat aortic smooth muscle cells. (2S)-naringenin (1) significantly inhibited cell proliferation in a dose-dependent manner without cytotoxic at concentrations of 30, and 50 µM; it reduced the number of cells following PDGF-BB treatment to 1.83 ± 0.30 × 10(4) and 2.20 ± 0.60 × 10(4) cells/well, respectively. These findings suggest that (2S)-naringenin has antiproliferative effects on aortic smooth muscle cells.


Assuntos
Proliferação de Células/efeitos dos fármacos , Flavonoides/química , Glicosídeos/química , Músculo Liso Vascular/efeitos dos fármacos , Extratos Vegetais/química , Typhaceae , Animais , Aorta/efeitos dos fármacos , Becaplermina , Flavonoides/farmacologia , Glicosídeos/farmacologia , Músculo Liso Vascular/citologia , Extratos Vegetais/farmacologia , Fator de Crescimento Derivado de Plaquetas/farmacologia , Pólen , Proteínas Proto-Oncogênicas c-sis , Ratos
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