Abstract: The present disclosure uses different kinds of surface treatment processes on titanium-made dental implants. The growth and attachment conditions of bone cells (MC3T3-E), fibroblasts(NIH 3T3) and epidermal cells (XB-2) on the metal surface of titanium slices with different surface treatments are observed. Tetra-calcium phosphate is used to perform secondary sand-blasting process to clean up the metal surface and provide calcium ions for osteoblastoma physiology. Thus, by adjusting the cells adhesive and proliferative abilities, the success rate of the clinical applications in dental implant is improved.

Abstract: A calcium phosphate cement suitable for use in dental and bone prosthesis is disclosed, which include calcium phosphate particles having a diameter of 0.05 to 100 microns, wherein said calcium phosphate particles on their surfaces have whiskers or fine crystals having a width ranging from 1 to 100 nm and a length ranging from 1 to 1000 nm.

Abstract: Apparatus and methods are disclosed herein for a reverse-connection STT MTJ element of a MRAM to overcome the source degeneration effect when switching the magnetization of the MTJ element from the parallel to the anti-parallel direction. A memory cell of a MRAM having a reverse-connection MTJ element includes a switching device having a source, a gate, and a drain, and a reverse-connection MTJ device having a free layer, a fixed layer, and an insulator layer interposed between the free layer and the fixed layer. The free layer of the reverse-connection MTJ device is connected to the drain of the switching device and the fixed layer is connected to a bit line (BL). The reverse-connection MTJ device applies the lower IMTJ capability of the memory cell caused by the source degeneration effect to the less stringent IMTJ(AP->P) while preserving the higher IMTJ capability for the more demanding IMTJ(P->AP).

Abstract: The invention provides a calcium phosphate bone cement, a precursor and a fabrication method thereof. The fabrication method comprises: (a) dissolving a calcium phosphate with a low Ca/P atomic ratio in an acid solution, wherein the Ca/P atomic ratio is less than 1.33; (b) adding a calcium phosphate compound into the acid solution to obtain a reaction solution; (c) allowing the reaction solution to stand to grow nanocrystallites on surfaces of the calcium phosphate with low Ca/P atomic ratio; (d) filtering and drying the solution of step (c) to obtain a calcium phosphate powder with low Ca/P atomic ratio having nanocrystallites on the surface; and (e) mixing the powder of step (d) and a calcium phosphate powder with a high Ca/P atomic ratio.

Abstract: The present invention is a continuous feeder which, through a power source, can continuously drive a fixing clip to move back and forth equidistantly and also a mobile clip at the top of the fixing clip, so that when the fixing clip arrives the return point, the material can be downwardly clipped or upwardly released for achieving a continuous feeding. The present invention not only can precisely adjust the moving distance of material in processing for continuously and accurately driving the material to the operation tool, but also can change the driving method for the material to be pull or push in response to the hardness degree of the material.

Abstract: The present invention is a pneumatic continuous feeder which, through an air-pressure motive power source, can continuously drive a fixing clip to move back and forth equidistantly and also a mobile clip at the top of the fixing clip, so that when the fixing clip arrives the return point, the material can be downwardly clipped or upwardly released for achieving a continuous feeding. The present invention not only can precisely adjust the moving distance of material in processing for continuously and accurately driving the material to the operation tool, but also can change the driving method for the material to be pull or push in response to the hardness degree of the material.

Abstract: A manufacturing method of a rotor includes the following steps. A substrate is processed to form a first patterned area, a second patterned area and a third patterned area. The second patterned area is formed around the first patterned area, and the third patterned area is connected to the second patterned area. The first patterned area is processed to form a case. The third patterned area is bent towards the case along a joint line between the second patterned area and the third patterned area to form the blades. The rotor includes a case, a connecting portion and the blades. The case is cylindrical and has a sidewall. The connecting portion is extended from one end of the sidewall of the case. The blades are extended from the connecting portion.

Abstract: A fast-setting, bioresorbable calcium phosphate cement is prepared by a process which can be carried out with a heat treatment up to 1000° C. on a mixture of a wetting solution and a calcium phosphate powder having a Ca to P molar ratio of 0.5-2.5. The wetting solution suitable for use in the process of the present invention includes water, an organic solvent, an acidic and basic solution. A setting solution for mixing with the heated powder to form the fast-setting, bioresorbable calcium phosphate cement may be water, an acidic or basic solution according to the process of the present invention.

Abstract: A method for increasing working time/setting time of monolithic tetracalcium phosphate (TTCP) cement paste formed by mixing a TTCP powder with an aqueous solution, which includes heating the TTCP powder, prior to the mixing, so that the TTCP powder is maintained at a temperature of 50-350° C. for a period of time which is greater than one minute, and that a TTCP cement paste formed by mixing the resulting heated TTCP powder with the aqueous solution has a prolonged working time in comparison with that formed by mixing TTCP powder that has not been subjected to such heating with the aqueous solution.

Abstract: A calcium phosphate cement suitable for use in dental and bone prosthesis is disclosed, which include calcium phosphate particles having a diameter of 0.05 to 100 microns, wherein said calcium phosphate particles on their surfaces have whiskers or fine crystals having a width ranging from 1 to 100 nm and a length ranging from 1 to 1000 nm.

Abstract: A calcium phosphate cement suitable for use in dental and bone prosthesis is disclosed, which include calcium phosphate particles having a diameter of 0.05 to 100 microns, wherein said calcium phosphate particles on their surfaces have whiskers or fine crystals having a width ranging from 1 to 100 nm and a length ranging from 1 to 1000 nm.

Abstract: A tetracalcium phosphate (TTCP) particle for use in preparing a fast-setting, bioresorbable calcium phosphate cement is disclosed. The TTCP particle has a basic calcium phosphate whiskers on a surface thereof; the basic calcium phosphate whiskers having a Ca/P molar ratio greater than 1.33, and having a length up to about 5000 nm and a width up to about 500 nm. The basic calcium phosphate whiskers are substantially free of a hydroxyapatite phase and mainly composed of TTCP phase.

Abstract: A fast-setting, bioresorbable calcium phosphate cement is prepared by a process which can be carried out with a heat treatment up to 1000° C. on a mixture of a wetting solution and a calcium phosphate powder having a Ca to P molar ratio of 0.5–2.5. The wetting solution suitable for use in the process of the present invention includes water, an organic solvent, an acidic and basic solution. A setting solution for mixing with the heated powder to form the fast-setting, bioresorbable calcium phosphate cement may be water, an acidic or basic solution according to the process of the present invention.

Abstract: A tetracalcium phosphate (TTCP) particle for use in preparing a fast-setting, bioresorbable calcium phosphate cement is disclosed. The TTCP particle has a basic calcium phosphate whiskers on a surface thereof; the basic calcium phosphate whiskers having a Ca/P molar ratio greater than 1.33, and having a length up to about 5000 nm and a width up to about 500 nm. The basic calcium phosphate whiskers are substantially free of a hydroxyapatite phase and mainly composed of TTCP phase.

Abstract: A tetracalcium phosphate (TTCP) particle for use in preparing a fast-setting, bioresorbable calcium phosphate cement is disclosed. The TTCP particle has a basic calcium phosphate whiskers on a surface thereof; the basic calcium phosphate whiskers having a Ca/P molar ratio greater than 1.33, and having a length up to about 5000 nm and a width up to about 500 nm. The basic calcium phosphate whiskers are substantially free of a hydroxyapatite phase and mainly composed of TTCP phase.

Abstract: A tetracalcium phosphate (TTCP) particle for use in preparing a fast-setting, bioresorbable calcium phosphate cement is disclosed. The TTCP particle has a basic calcium phosphate whiskers on a surface thereof; the basic calcium phosphate whiskers having a Ca/P molar ratio greater than 1.33, and having a length up to about 5000 nm and a width up to about 500 nm. The basic calcium phosphate whiskers are substantially free of a hydroxyapatite phase and mainly composed of TTCP phase.

Abstract: A tetracalcium phosphate (TTC P) particle for use in preparing a fast-setting, bioresorbable calcium phosphate cement is disclosed. The TTCP particle has a basic calcium phosphate whiskers or fine crystals on a surface thereof; the basic calcium phosphate whiskers or fine crystals having a Ca/P molar ratio greater than 1.33, and having a length up to about 5000 nm and a width up to about 500 nm.

Abstract: A tetracalcium phosphate (TTCP) particle for use in preparing a fast-setting, bioresorbable calcium phosphate cement is disclosed. The TTCP particle has a basic calcium phosphate whiskers or fine crystals on a surface thereof; the basic calcium phosphate whiskers of fine crystals having a Ca/P molar greater that 1.33, and having a length up to about 5000 nm and a width up to about 500 nm.

Abstract: A calcium phosphate cement suitable for use in dental and bone prosthesis is disclosed, which include calcium phosphate particles having a diameter of 0.05 to 100 microns, wherein said calcium phosphate particles on their surfaces have whiskers or fine crystals having a width ranging from 1 to 100 nm and a length ranging from 1 to 1000 nm.

Abstract: A bearing structure. A bearing is disposed in a bushing and includes a through hole and a slot. The slot receives a lubricant. An inner wall forming the through hole includes at lease one spiral-shaped furrows for guiding the lubricant into the slot. The inner wall of the bearing is divided into a first section and a second section by the slot. The spiral-shaped furrows on the first section and on the second section have different spiral directions for separately guiding the lubricant into the slot. The lubricant received in the slot can be lubricating oil. The bearing structure prevents leakage of the lubricant and effectively retains the lubricant in the bearing.