Abstract: A multi-section expandable device includes an expansion module, a first push member and a second push member disposed at front and rear ends of the expansion module, and a bolt screwedly connected to the first and second push members. When the bolt is tightened, the first push member and the second push member are pushed to approach each other so as to push the expansion module to generate a first-stage expansion and a second-stage expansion. The first-stage expansion enables the expansion module to expand laterally so as to adjust its width. The second-stage expansion is performed after the expansion module is laterally expanded to have a maximum width, so that the expansion module is longitudinally expanded to adjust its height. The multi-section expandable device not only has better support effect, but also avoids the wear of the contact surfaces of the vertebrae.

Abstract: A bone drilling cover device comprises an upper fastening member and a lower fastening member. The upper fastening member includes a first base portion and a first coupling portion. The lower fastening member includes a second base portion and a second coupling portion engagable with the first coupling portion. The second base portion is composed of at least one first arm and at least one second arm. The first arm has a length greater than a length of the second arm. A total length of the first arm and the second arm is greater than a diameter of a drilled hole. Through the first arm and the second arm having different lengths, the first arm and the second arm can be inserted in an oblique manner and positioned to the underside of the drilled hole for covering the drilled hole of any bone.

Abstract: A bone drilling cover fixing device includes an upper fastening member and a lower fastening member. The upper fastening member includes a first base portion and a first coupling portion. The first coupling portion protrudes from an underside of the first base portion and can be inserted into a drilled hole. The lower fastening member includes a second base portion and a second coupling portion. The second base portion includes at least one first arm and at least one second arm. The first arm has a length equal to that of the second arm. The length of the first arm and the length of the second arm are greater than a radius of the drilled hole. When in use, the first and second arms are inserted in an oblique manner into the drilled hole to be positioned at two ends of an underside of the drilled hole.

Abstract: A skull fixing device includes at least a lower fastening member and a movable retainer assembly. The lower fastening member includes a thread rod having a first coupling section formed in an interior thereof. The movable retainer assembly includes at least an upper fastening member and a nut. The upper fastening member includes a sleeve section in which a first rotation section is formed. The nut is screwed to the threaded rod and has an upper end forming a first positioning section and has an outer surface forming a second rotation section mating the first rotation section. Also disclosed is a surgery tool that includes at least a outer barrel having a lower end forming a second positioning section engageable with the first positioning section and an inner guide rod having a lower end forming a second coupling section engageable with the first coupling section.

Abstract: A bone fusion device includes a main body and a movable frame. The main body has an accommodation hole. A top surface and a bottom surface of the main body are provided with a plurality of first teeth. The movable frame is located in the accommodation hole. The movable frame has a through hole longitudinally penetrating a first surface and a second surface thereof. A first end of the movable frame is fixed to the front end of the main body, and a second end is suspended relative to the rear end of the main body. The first surface and the second surface are provided with a plurality of second teeth. The movable frame is transversely formed with a groove to define an upper portion and a lower portion, enabling the upper portion and the lower portion to be elastically expanded with the first end as a fulcrum.

Abstract: A bone graft or spinal interbody device includes a frame member having two end segments for forming a chamber in the frame member, and two arms each include an outer end portion hinged to the outer end portion of the end segments of the frame member, and the inner end portions of the arms are hinged together for allowing the arms to be pivoted toward the frame member at an innermost folding position or away from the frame member to an outermost working position, and the arms are sprung away from the frame member to the outermost working position when the arms are pushed away from the frame member for a selected distance to an inner dead center (D).

Abstract: A bone fusion device includes a main body and a movable frame. The main body has an accommodation hole. A top surface and a bottom surface of the main body are provided with a plurality of first teeth. The movable frame is located in the accommodation hole. The movable frame has a through hole longitudinally penetrating a first surface and a second surface thereof. A first end of the movable frame is fixed to the front end of the main body, and a second end is suspended relative to the rear end of the main body. The first surface and the second surface are provided with a plurality of second teeth. The movable frame is transversely formed with a groove to define an upper portion and a lower portion, enabling the upper portion and the lower portion to be elastically expanded with the first end as a fulcrum.

Abstract: A textured bone graft or implant device includes a spatial member having a number of three dimensional units coupled together, the three dimensional units each include a number of bars coupled together to form a number of openings and to form a porous structure for the spatial member and for allowing the bone materials of the user to be grown and filled into the openings of the textured implant device, the spatial member includes a chamber for engaging with a casing, and the casing includes a compartment for engaging with an inner core, the casing and the inner core each include a number of bars for forming a resilient or flexible or compressible or deformable structure.