Comparison of the interdiffusion of four self-etching adhesives in resin-aged glass-fiber-reinforced composites / 口腔疾病防治

Objective@#To observe the permeability of four kinds of self-etching adhesives in aged glass-fiber-reinforced composite (GFRC).@*Methods@#After light polymerization following the manufacturers’ instructions, a total of 80 pieces of bisphenol-A-glycodal-methacrylate (Bis-GMA)+ polymethyl methacrylate (PMMA) based GFRC were randomly divided into two main groups: test group and control group, each group was then divided into four subgroups with 10 samples for each subgroup. While the test group was conducted to be aged through thermocycling at 5 ℃/55 ℃, the control group remained fresh. After the addition of a fluorescent dye (rhodamine-B-isothiocyanate), four self-etching adhesives AdperEasy One (AEO), S 3 BOND (S 3B), Tetric N-Bond Self-Etch (TNB), G-Bond (GB) were correspondently applied to the test and control groups and were light polymerized. Specimens were sectioned using hard tissue cutting and grinding system. Slices from each subgroup were observed under a confocal laser scanning microscope, the depth of dye permeation (DDP) under the surface of GFRC in each group was measured and the Results were statistically analyzed.@*Results@#The DDP of AEO was the deepest (32.58 ± 6.06) μm, and that of TNB was the shallowest (6.19 ± 1.38)μm among the four self-etching adhesive subgroups in the control group. The order of each group was AEO > GB > S 3B > TNB. The DDP of the four subgroups in the test group was significantly shallower than that in the control group (P < 0.05). The change in GB was the greatest (9.05 ± 2.35)μm/(28.93 ± 5.32)μm. In the test group, the DDP in AEO was the deepest (28.42 ± 5.32)μm, and the DDP in TNB was shallowest (1.93 ± 0.22)μm again. The order of each group was AEO > S 3B > GB > TNB. In the test group, while the layer of fluorescent dye of AEO and S 3 B could still be seen distinctly, that of TNB and GB was hard to recognize. @*The DDP of AEO was the deepest (32.58 ± 6.06) μm, and that of TNB was the shallowest (6.19 ± 1.38)μm among the four self-etching adhesive subgroups in the control group. The order of each group was AEO > GB > S 3B > TNB. The DDP of the four subgroups in the test group was significantly shallower than that in the control group (P < 0.05). The change in GB was the greatest (9.05 ± 2.35)μm/(28.93 ± 5.32)μm. In the test group, the DDP in AEO was the deepest (28.42 ± 5.32)μm, and the DDP in TNB was shallowest (1.93 ± 0.22)μm again. The order of each group was AEO > S 3B > GB > TNB. In the test group, while the layer of fluorescent dye of AEO and S 3 B could still be seen distinctly, that of TNB and GB was hard to recognize. @#The self-etching adhesives of AEO and S 3 B still have good permeation effect in this kind of aged GFRC, which can help to establish a good bond between these aged GFRC and the subsequent repair of composite resin.

Alternativa estética ante la pérdida de piezas primarias en el sector anterior: resolución clínica / Esthetic alternative to the loss of primary pieces in the previous sector

La pérdida de piezas permanentes en el sector anterior sigue siendo una preocupación clínica en el tratamiento odontológico de niños y adolescentes. Es importante destacar que la pubertad y la adolescencia son etapas donde las relaciones con los pares son de suma importancia. Las restauraciones protéticas convencionales no cumplen las expectativas estéticas, pero siguen siendo el tratamiento de elección, ya que los implantes solo pueden ser realizados una vez finalizados el crecimiento y el desarrollo. Los sistemas adhesivos mediante cinta de fibra de vidrio han simplificado el trabajo, brindando una alternativa intermedia conservadora y estética. El objetivo de este trabajo es presentar la resolución clínica en dos pacientes que concurrieron a la Cátedra de Odontología Integral Niños luego de haber sufrido traumatismos que provocaron la pérdida de piezas dentarias permanentes logrando la restitución de la longitud de arco, la devolución de la estética y la fonación con la colocación de una prótesis tipo Maryland, realizada con cinta de fibra de vidrio preimpregnada con resina compuesta (AU)

Premature loss of anterior permanent teeth is still a cause for concern in dental treatment of children and adolescents. Social relationships with peers are particularly important during puberty and adolescence. Removable prosthesis has always been a choice but they may not satisfy patients' esthetic expectations and dental implants can only be placed after the jaw has finished growing. Adhesive directly bonded splints with glass fibers reinforced composite resins can be an alternative to conventional space maintainers. The aim of this report is to describe the treatment of two patients who attended at the Department of Comprehensive Children´s Dentistry after suffering traumatic dental injuries using bridges as an approach to restore arch length, esthetics and function (AU)

An evaluation of glass fiber-reinforced composite resin post core for severe defect restoration of front teeth / 实用口腔医学杂志

In order to explore the clinical effect of the glass fiber-reinforced composite resin post core for severe defect restoration of front teeth,sixty-two teeth were restored for forty-one patients with severe defect restoration of front teeth by glass fiber-reinforced composite resin post core plus alumina all-ceramic crown.Through 0.6-2.0 years follow up,all the prosthesis worked very well without breaking or falling off,no gum coloring except two posts fell off after the restoration at sixth month.The patients satisfied with the restoration.