Abstract: Provided is a biostable radiopaque substance that is absorbed within living tissue or inflammatory lesion in living tissue and uses thereof. The radiopaque substance does not cause an inflammatory reaction in surrounding tissue and is rapidly absorbed before healing occurs, thereby not interfering with healing and regeneration of damaged tissue. Therefore, the radiopaque substance of the present disclosure can be included in a biotransplantation material, for example, a root canal filling material for endodontic treatment, and be effectively used.

Abstract: The present disclosure relates to a medical cement composition containing calcium silicate in an amount of less than 20 wt % of a total weight of the composition, with a lithium salt being added thereto. The medical cement composition of the present disclosure has a low compressive strength of 12 MPa or less, after being hardened, for easy removal, excellent stability in storage, and high bioactivity.

Abstract: The present invention relates to a rapid-setting hydraulic binder composition and, more specifically, to a hydraulic binder composition, which contains tricalcium aluminate (C3A) and dodecacalcium heptaaluminate (C12A7), and thus is rapidly set, has an easily adjustable setting time, and is bio-friendly.

Abstract: According to one aspect of the present disclosure, there is provided a single paste type hydraulic dental filling composition. The single paste type hydraulic dental filling composition includes hydraulic cement, non-aqueous liquid having hygroscopic properties, and a radiopaque material.

Abstract: The present invention relates to a rapid-setting hydraulic binder composition and, more specifically, to a hydraulic binder composition, which contains tricalcium aluminate (C3A) and dodecacalcium heptaaluminate (C12A7), and thus is rapidly set, has an easily adjustable setting time, and is bio-friendly.

Abstract: According to one aspect of the present disclosure, there is provided a single paste type hydraulic dental filling composition. The single paste type hydraulic dental filling composition includes hydraulic cement, non-aqueous liquid having hygroscopic properties, and a radiopaque material.

Abstract: A dental filling composition includes zirconia powder, a hydraulic inorganic binding agent, a slightly acidic hardening controller agent and a pozzolan component with respect to the gross weight of the composition. The dental filling composition includes 45% to 85% of zirconia powder with respect to the gross weight of the composition, and includes a minimum quantity of inorganic binding agent, thus exhibiting excellent radio opacity and hardly comprising heavy metals. Therefore, the dental filling composition of the present invention is excellent in biocompatibility, and therefore, can be safely and widely used in various dental filling operations.

Abstract: An oil separation method and apparatus for separation by coarse particulation which includes the steps of forming a coarse particulating element with an oil water separation layer which includes forming a water insoluble hydrogel which has an oil resisting and oil repelling function as well as water permeating and absorbing function on the surface of a porous material and/or the surface of a fluid passage to be contacted with oil holding water and alternately passing the oil holding water through the surface of the element to perform coarse particulation separation of oil at the surface of the element.

Abstract: A method of recycling and purifying water-soluble cutting agents is disclosed. The used water-soluble cutting agent is recycled by filtering through an oil-water separating filter consisting of a porous sheet and an oil-water separating layer composed essentially of a water-insoluble and water absorbable gel layer, which is formed on a surface portion of the porous sheet and is adapted to be contacted with the cutting agent and/or surface portions of the porous sheet serving as flow path.