Abstract: A device for bone fixation comprises an expansion part and a covering part. The expansion part has a fixing end and a top end and provides an expansion structure for being adjustable between a state of expansion and contraction. The covering part has a front end and a joining end, wherein the front end thereof is joined to the top end of the expansion part, and the joining end thereof is attached to the fixing end of the expansion part. The covering part is employed to cover the expansion structure. After the expansion part and the covering part are added to the bone, the covering part is unfurled to spread to the expansion state, and the medical filler is injected or pushed into the covering part.

Abstract: An artificial hip joint replacement system comprises a hollow fixation part having a joining end at a proximal end thereof and an injecting end at a distal end thereof, a cover part being joined with the injecting end of the hollow fixation part, a medical filling being forceable and/or injectable via the injecting end of the hollow fixation part and into the cover part, such that the medical filling is allowed to become lump-like after injecting is completed; a hip joint substitute being adapted to be joined with the joint end of the hollow fixation part and used for covering over a pre-finished femur; and an acetabular implant being adapted to be joined with the hip joint substitute to form the artificial hip joint replacement system.

Abstract: A medical implant includes a flexible container having two layers of flexible surrounding walls, each surrounding wall being provided with a plurality of through holes; a tubular fitting being connected to an open end of the flexible container for inserting or infusing a medical filling material into the flexible container through the tubular fitting; and a thrust part connected to the flexible surrounding walls of the flexible container and at a distal end of the flexible container. The thrust part has a receiving seat and a ring, the receiving seat having a central bore and an annular groove surrounding the central bore and opposite to the central bore, wherein a tubular surrounding wall is inserted into the ring and is folded so that the two layers of flexible surrounding walls are formed with the ring imbedded between the two layers of flexible surrounding walls, and the ring with the two layers of flexible surrounding walls are received in the annular groove and detained therein due to friction.

Abstract: This invention relates to a method for operating on a spine, and more particularly to a method for operating on a spine by using a spinal fixation device which comprises the steps of (1) creating a hole on a vertebra; (2) placing said hollow fixation part joined with said cover part into the hole, and leaving the joining end of said hollow fixation part outside of the vertebra and exposed; (3) injecting said medical filling into said cover part via an injecting device and said hollow fixation part; (4) allowing said medical filling to become solidified so that said medical filling and the cover part form a lump; (5) removing said injecting device from said hollow fixation part.

Abstract: A device for bone fixation is comprised of an expansion part and a covering part. The expansion part has a fixing end and a top end and provides an expandable structure for being adjusted in a state of expansion or contraction. The covering part has a front end and a joining end, wherein the front end thereof is joined to the top end of the expansion part, and the joining end thereof is attached to the fixing end of the expansion part. The covering part is employed to cover the expandable structure. After the expansion part and the covering part being added to the bone, the covering part is unfurled to spread to the expansion state, and the medical filler is stuffed or poured into the covering part.

Abstract: A medical implant includes a flexible container having two layers of flexible surrounding walls, each surrounding wall being provided with a plurality of through holes; a tubular fitting being connected to an open end of the flexible container for inserting or infusing a medical filling material into the flexible container through the tubular fitting; and a thrust part connected to the flexible surrounding walls of the flexible container and at a distal end of the flexible container. The thrust part has a receiving seat and a ring, the receiving seat having a central bore and an annular groove surrounding the central bore and opposite to the central bore, wherein a tubular surrounding wall is inserted into the ring and is folded so that the two layers of flexible surrounding walls are formed with the ring imbedded between the two layers of flexible surrounding walls, and the ring with the two layers of flexible surrounding walls are received in the annular groove and detained therein due to friction.