Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros










Intervalo de ano de publicação
1.
Acta Crystallogr C Struct Chem ; 76(Pt 2): 148-158, 2020 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-32022709

RESUMO

Two new metal-organic frameworks (MOFs), namely, three-dimensional poly[diaquabis{µ2-1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene}bis(µ2-glutarato)dinickel(II)] monohydrate], {[Ni2(C5H6O4)2(C16H18N4)2(H2O)2]·H2O}n or {[Ni2(Glu)2(1,4-mbix)2(H2O)2]·H2O}n, (I), and two-dimensional poly[[{µ2-1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene}(µ2-glutarato)zinc(II)] tetrahydrate], {[Zn(C5H6O4)(C16H18N4)]·4H2O}n or {[Zn(Glu)(1,4-mbix)]·4H2O}n (II), have been synthesized hydrothermally using glutarate (Glu2-) mixed with 1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene (1,4-mbix), and characterized by single-crystal X-ray diffraction, IR and UV-Vis spectroscopy, powder X-ray diffraction, and thermogravimetric and photoluminescence analyses. NiII MOF (I) shows a 4-connected 3D framework with point symbol 66, but is not a typical dia network. ZnII MOF (II) displays a two-dimensional 44-sql network with one-dimensional water chains penetrating the grids along the c direction. The solid-state photoluminescence analysis of (II) was performed at room temperature and the MOF exhibits highly selective sensing toward Fe3+ and Cr2O72- ions in aqueous solution.

2.
J Appl Oral Sci ; 25(5): 483-489, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29069145

RESUMO

OBJECTIVE: To evaluate the effect of bite positions characterizing different splint treatments (anterior repositioning and stabilization splints) on the disc-condyle relation in patients with TMJ disc displacement with reduction (DDwR), using magnetic resonance imaging (MRI). MATERIAL AND METHODS: 37 patients, with a mean age of 18.8±4.3 years (7 male and 30 females) and diagnosed with DDwR based on the RDC/TMD, were recruited. MRI metrical analysis of the spatial changes of the disc/condyle, as well as their relationships, was done in three positions: maximum intercuspation (Position 1), anterior repositioning splint position (Position 2), and stabilization splint position (Position 3). Disc/condyle coordinate measurements and disc condyle angles were determined and compared. RESULTS: In Position 1, the average disc-condyle angle was 53.4° in the 60 joints with DDwR, while it was -13.3° with Position 2 and 30.1° with Position 3. The frequency of successful "disc recapture" with Position 2 was significantly higher (58/60, 96.7%) than Position 3 (20/60, 33.3%). In Positions 2 and 3, the condyle moved forward and downward while the disc moved backward. The movements were, however, more remarkable with Position 2. CONCLUSIONS: Anterior repositioning of the mandible improves the spatial relationship between the disc and condyle in patients with DDwR. In addition to anterior and inferior movement of the condyle, transitory posterior movement of the disc also occurred.


Assuntos
Luxações Articulares/fisiopatologia , Luxações Articulares/terapia , Côndilo Mandibular/lesões , Placas Oclusais , Disco da Articulação Temporomandibular/lesões , Adolescente , Adulto , Análise de Variância , Criança , Desenho de Equipamento , Feminino , Humanos , Incisivo/fisiopatologia , Luxações Articulares/diagnóstico por imagem , Imageamento por Ressonância Magnética , Masculino , Côndilo Mandibular/diagnóstico por imagem , Côndilo Mandibular/patologia , Côndilo Mandibular/fisiopatologia , Variações Dependentes do Observador , Valores de Referência , Reprodutibilidade dos Testes , Disco da Articulação Temporomandibular/diagnóstico por imagem , Disco da Articulação Temporomandibular/fisiopatologia , Resultado do Tratamento , Adulto Jovem
3.
J. appl. oral sci ; 25(5): 483-489, Sept.-Oct. 2017. tab, graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-893650

RESUMO

Abstract Objective: To evaluate the effect of bite positions characterizing different splint treatments (anterior repositioning and stabilization splints) on the disc-condyle relation in patients with TMJ disc displacement with reduction (DDwR), using magnetic resonance imaging (MRI). Material and Methods: 37 patients, with a mean age of 18.8±4.3 years (7 male and 30 females) and diagnosed with DDwR based on the RDC/TMD, were recruited. MRI metrical analysis of the spatial changes of the disc/condyle, as well as their relationships, was done in three positions: maximum intercuspation (Position 1), anterior repositioning splint position (Position 2), and stabilization splint position (Position 3). Disc/condyle coordinate measurements and disc condyle angles were determined and compared. Results: In Position 1, the average disc-condyle angle was 53.4° in the 60 joints with DDwR, while it was −13.3° with Position 2 and 30.1° with Position 3. The frequency of successful "disc recapture" with Position 2 was significantly higher (58/60, 96.7%) than Position 3 (20/60, 33.3%). In Positions 2 and 3, the condyle moved forward and downward while the disc moved backward. The movements were, however, more remarkable with Position 2. Conclusions: Anterior repositioning of the mandible improves the spatial relationship between the disc and condyle in patients with DDwR. In addition to anterior and inferior movement of the condyle, transitory posterior movement of the disc also occurred.


Assuntos
Humanos , Masculino , Feminino , Criança , Adolescente , Adulto , Adulto Jovem , Placas Oclusais , Disco da Articulação Temporomandibular/lesões , Luxações Articulares/fisiopatologia , Luxações Articulares/terapia , Côndilo Mandibular/lesões , Valores de Referência , Imageamento por Ressonância Magnética , Variações Dependentes do Observador , Reprodutibilidade dos Testes , Análise de Variância , Resultado do Tratamento , Disco da Articulação Temporomandibular/fisiopatologia , Disco da Articulação Temporomandibular/diagnóstico por imagem , Luxações Articulares/diagnóstico por imagem , Desenho de Equipamento , Incisivo/fisiopatologia , Côndilo Mandibular/fisiopatologia , Côndilo Mandibular/patologia , Côndilo Mandibular/diagnóstico por imagem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...