http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
카복실레이트 시멘트의 결합을 위한 상아질의 불소처리에 관한 연구
임호남 大韓齒科器材學會 1994 대한치과재료학회지 Vol.21 No.2
Fluoride treatment of dentin surface can offer the expectations for the increase of bond strength carboxylate cements due to the increase of inorganic contents. The purpose of this study was to evaluate the influences of the concentrations and the application time of NaF solutions on the bond strength. Bovine teeth of the lower central incisors were abraded to be exposed to smooth and flat dentin surfaces. Polycarboxylate cements were classified and experimented as a SnF₂contained one and a NaF contained one. The concentrations of 1%, 2%, 3%, 4% and the application time of 2, 5, 8, 10 minutes were used. Total numbers of experimental groups were 32. Shear bond strengths of each groups were measured and used to determine the influences of concentrations and application time on those measurements. Bond strengths were increased by the higher concentrations of NaF solutions. At the aspect of the application time, groups of 8 minute treatment showed the highest bond strength. A polycarboxylate cement containing SnF₂exhibited the higher bond strength than that of a NaF contained one.
폴리카복실산중 리치움, 마그네슘, 포타슘 황화물의 함량이 법랑질표면에 성장된 결정의 특성에 미치는 영향
임호남 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.2
The purpose of this study was to confirm the effects of incorporation of lithium, magensium, potassium sulfate on the length of crystals, and the correlation between the crystal length and the shear bond strength. Basic solution was a mixture of polycarboxylic acid and diluted sulfuric acid, three sulfates were added into them with the concentrations between 0.1% and 0.5% by weight ratio. The length of crystals were measured on the scanning electron microscope, and the shear bond strength were measured on the universal testing machine. Regression test between crystal length and sheat bond strength were done. Shear bond strength were influenced by the concentration factor than the factor of sulfates kinds. In magnesium sulfate experimental groups, the shear bond strength were decreased and then increased again by the rise of concentration, and the longer crystals showed the higher shear bond strength. Lithium sulfate exhibited the efficacy of lengthening the crystals, magnesium sulfate can be used as a material reducing the length of crystal, however potassium sulfate showed no-effect on the length of crystal. It could be concluded that the length of crystal can be controlled by the concentration of sulfates, and that the shear bond strength were influenced with the length of crystal. So the related to the definitions of crystals which exhibit the high shear bond strength and the controlled composition of crystal growth solutions are needed.
각종 산성 수용액이 상아세관의 개방형태와 HEMA 상아질접착제의 전단결합강도에 미치는 영향
임호남 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.1
This study was planned to evaluate the effect of acidic aqueous solutions unlike phosphoric acid on the dentin bonding. Acids such as phosphoric acid, pyruvic acid, oxalic acid, and nitric acid, and EDTA were mixed with glycine, lysine, NPG, ferric oxalate or aluminum nitrate. 13 kinds of solutions were prepared, and its pH were measured. Observations of shapes of orifices of dential tubules on the external surface of dentin treated with experimental solutions and measurements of shear bond strengths between HEMA based dentin bonding agent and dentin treated were done. Following results and conclusion were drawn: 1. pH of pyruvic acid solutions were higher than that of traditional phosphric acid, EDTA showed the least decalcification of dentin, and glycine and lysine exhibited the buffer effects. 2. The highest shear bond strength was confirmed on 10% pyruvic acid group. 3. Incorporation of NPG into phosphoric acid, nitric acid, pyruvic acid did not induce the decrease of shear bond strength. 4. Co-relation between pH and shear bond strength was not confirmed, however in groups from a acid, the increase of pH made the decrease of shear bond strength. 5. Nitric acid containing NPG, phosphoric acid containing glycine, and pyruvic acid containing lysine showed the closing of orifices of dental tubules without the dcrease of shear bond strength. It could be assumed that pyruvic acid is excellant one than traditional phosphoric acid, and that NPG, glycine and lysine can be used as closing agent for dentinal tubules without the loss of shear bond strength, and a desensitizing agent.