Publications by authors named "Yun-mao Liao"

Objective: To develop a new local delivery system, zoledronic-acid-loaded chitosan/calcium phosphate ceramic, and to determine its characterization and in vitro response of osteoblast cells.

Methods: Zoledronic-acid-loaded chitosan/calcium phosphate ceramic were prepared by solution casting method at a concentration of 10(-5), 10(-4), and 10(-3) mol/L, respectively. The physicochemical properties of the resulting materials were determined using SEM and FTIR.

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Objective: To evaluate the shear bond strength (SBS) between alumina-toughened zirconia (ATZ) cores and veneering ceramics, investigate the effect of aging in artificial saliva on SBS and compare it with that of yttria-stabilized tetragonal zirconia polycrystals(Y-TZP).

Methods: Bars of ATZ and Y-TZP were layered with veneering ceramics in accordance to the recommendation of the manufacturer. Half of each group (n = 10) was aged at 134 °C (under 2 bar pressure) in an autoclave for 48 h.

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Objective: The objective of this study is to investigate the influence of zirconia content which is 0-30.0% weight percentage of matrix on translucency of zirconia-toughened alumina glass-infiltrated ceramics.

Methods: Seven groups were divided according to different weight percentage of zirconia (0, 2.

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Objective: To study the effects of alumina content on sintered density, mechanical property and translucency of zirconia nanocomposite all-ceramics.

Methods: Specimens of zirconia nanocomposite all-ceramics were divided into five groups based on their alumina content which are 0% (control group), 2.5%, 5.

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Objective: To prepare a novel apatite-wollastonite bioactive glass-ceramic-calcium sulphate hemihydrate(AW-BGC-CSH) composite, to study its biocompatibility, and to provide experimental support for its further clinical application.

Methods: Samples of AW-BGC-CSH composite were prepared with different AW-BGC granules-CSH ratios (50%, 40%, 30%, 20%). Surface morphology, microstructure and mechanical features of the composite were measured.

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Objective: To investigate the effects of Sol-Gel coating on the corrosion resistance of nickel-chronium alloys in vitro.

Methods: The bond strength of coating-substrate interface sintered at different temperatures (300, 400, 500, 600 degrees C) was tested by scratching method. The Sol-Gel coating was analyzed by scanning electron microscope (SEM), and its corrosion resistance was assessed by a static immersion method.

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Objective: To prepare zinc-modified carbonated hydroxyapatite (Zn-CHA) coating material via sol-gel method and explore the influence of zinc substitution on physical and chemical properties of biomaterial samples.

Methods: Two kinds of samples with different zinc content and Ca/P molar ratio were prepared. One was fabricated with 4% zinc and the Ca/P molar ratio was 1.

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Objective: To develop a new type of anti-adhesion gel membrane and explore its applying technique.

Methods: 24 adult New Zealand white rabbits were used for the experiment research project, the animals were divided into two groups: the experiment group (18 adult New Zealand white rabbits) and the control group (6 adult New Zealand white rabbits). The animal models were established via the abdominal cavity.

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Objective: To compare the retention of selected cores to all-ceramic posts in post-and-core system, in which the ceramic core was combined with the post by direct sintering, adhering, and the composite resin core was formed onto the post.

Methods: A total of 15 all-ceramic post fabricated by alumina-zirconia nano-composite infiltrated ceramics were divided into three groups. In group A, forming and combining the ceramic core with the post by direct sintering.

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Objective: To investigae the function of the glass colorant on the color of the machinable infiltrated ceramics(MIC).

Methods: Five kinds of glass with different colorant were infiltrated through the aluminous matrix by heating the components to 1 100 degrees C for 2 hours. The specimens surface was polished, and their thickness was 0.

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Objective: To evaluated the cytotoxicity of a new nano-hydroxyapatite (n-HA) root canal sealer.

Methods: In this study, the cytotoxicity was evaluated by the method of MTT assay in vitro, and culture medium F12 as control, three concentrations of the soaking material cultured with mouse osteoblast separately, to test the cell relative growth rate (RGR) of every group.

Results: The toxicity graduation of the n-HA root canal sealer tends to 0 with the culture time increasing.

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Objective: To study the cell biocompatibility of porous biphasic calcium phosphate nanocomposite in vitro.

Methods: Bone marrow mesenchymal cell (BMSCs) obtained from SD rat bone marrow were in vitro induced and proliferated. Afler their osteoblast phenotypes were verified, BMSCs were seeded onto prepared porous biphasic calcium phosphate nanocomposite (Experiment group) and common porous hydroxyapatite (Control group).

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Objective: To make a comparative study on the fracture resistance of the all-ceramic posts in post-and-core system where the ceramic core was combined with the post by direct sintering and by two other methods.

Methods: A total of 15 all-ceramic posts fabricated by alumina-zirconia nano-composite infiltrated ceramics were randomly divided into three groups. They were given the following treatments: Group A: forming and combining the ceramic core with the post by direct sintering; group B: combining the ceramic core with the post by use of 3M RelyX for adhesion; group C: forming composite resin core onto the post.

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Objective: The fabrication of all-ceramic dental restorations is challenged by ceramics' relatively low flexural strength and intrinsic poor resistance to fracture. This paper aimed at investigating the relationships between powder-size gradation and mechanical properties of Zirconia toughened glass infiltrated nanometer-ceramic composite (Al(2)O(3)-nZrO(2)).

Methods: Al(2)O(3)-nZrO(2) ceramics powder (W) was processed by combination methods of chemical co-precipitation and ball milling with addition of different powder-sized ZrO(2).

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Objective: To investigate the mode and influential factor of new bone formation following distraction osteogenesis in mandibular lengthening.

Methods: Corticotomy was performed on bilateral mandibles in twelve adult male goats. A custom-made distractor was used to lengthen the mandible at a rate of 1 mm/day for 10 days (total 10 mm elongation).

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