Box-shaped spinal cage structure
View Patent ↗Disclosed is a box-shaped spinal cage structure including a cage body configured to have an internal space formed therein, an upper blocking part coupled to an upper surface of the cage body to block the internal space of the cage body from outside, a lower blocking part coupled to a lower surface of the cage body to block the internal space of the cage body from the outside, and a rear insertion hole formed through a rear surface of the cage body so that a bone graft is inserted into the internal space of the cage body through the rear insertion hole, so wherein the upper and lower surfaces of the cage body are blocked from the outside to prevent loss of the bone graft in the cage body.
1 . A box-shaped spinal cage structure comprising:
a cage body having an internal space formed therein;
an upper blocking part coupled to an upper surface of the cage body to block the internal space of the cage body from outside;
a lower blocking part coupled to a lower surface of the cage body to block the internal space of the cage body from the outside;
a rear insertion hole formed through a rear surface of the cage body such that a bone graft is insertable into the internal space of the cage body through the rear insertion hole;
a pair of front engagement parts protruding inwardly from both inner sides of a front surface of the cage body; and
a front locking part having a pair of hooks, the pair of hooks protruding rearwardly from a rear surface of the front locking part to be hooked and fastened to the pair of front engagement parts,
wherein the upper blocking part includes a plurality of upper pores and the lower blocking part includes a plurality of lower pores, thereby providing the upper blocking part and the lower blocking part with porosity,
wherein the pair of hooks include a material having elastic restoring force, allowing the pair of hooks to be deformed in leftward and rightward directions,
wherein the front locking part is configured to open or close the front surface of the cage body,
wherein, when the front locking part is coupled to the cage body through the front surface of the cage body, the front locking part is spaced apart from the rear insertion hole such that the cage body is disposed between the front locking part and the rear insertion hole,
wherein, when the front locking part is coupled to the cage body through the front surface of the cage body, the front surface of the cage body is completely sealed,
wherein, when the front locking part is separated from the front surface of the cage body, the front surface of the cage body communicates with the internal space of the cage body,
wherein the rear surface of the cage body is configured to be in communication with the internal space of the cage body through the rear insertion hole, and
wherein, when the front locking part is opened, the bone graft is configured to be inserted into the internal space of the cage body selectively through the front surface or the rear insertion hole.
2 . The box-shaped spinal cage structure according to claim 1 , wherein a plurality of left and right structures having a hollow interior is stacked on both side surfaces of the cage body.
3 . The box-shaped spinal cage structure according to claim 1 , wherein:
a first plurality of left and right structures is stacked on one side surface of the cage body, each of the first plurality of left and right structures includes a first hollow interior, and a side window having a larger size than a size of the first hollow interior is disposed in the one side surface of the cage body such that the bone graft is insertable into the internal space of the cage body through the side window; and
a second plurality of left and right structures is stacked on a remaining side surface of the cage body, and each of the second plurality of left and right structures includes a second hollow interior.
4 . The box-shaped spinal cage structure according to claim 1 , further comprising:
at least one upper window disposed on one side of the upper blocking part and having a larger size than a size of each of the plurality of upper pores; and
at least one lower window disposed on one side of the lower blocking part and having a larger size than a size of each of the plurality of lower pores,
wherein the bone graft is insertable into the internal space of the cage body through the at least one upper window and the at least one lower window.
5 . The box-shaped spinal cage structure according to claim 1 , further comprising at least one upper window disposed on one side of the upper blocking part and having a larger size than a size of each of the plurality of upper pores, wherein:
the bone graft is insertable into the internal space of the cage body through the at least one upper window; and
the plurality of lower pores is formed in the lower blocking part.
6 . The box-shaped spinal cage structure according to claim 1 , further comprising:
engagement slopes disposed on front surfaces of the front engagement parts, and including first inclined surfaces each having a first predetermined angle; and
hook slopes disposed on rear surfaces of the hooks, and including second inclined surfaces each having a second predetermined angle.
7 . The box-shaped spinal cage structure according to claim 1 , further comprising a set screw inserted and fastened into the rear insertion hole to block the internal space of the cage body from the outside.
8 . The box-shaped spinal cage structure according to claim 7 , wherein a screw hole is formed through a center of the set screw, and a diameter of the screw hole is smaller than a diameter of the rear insertion hole.
9 . The box-shaped spinal cage structure according to claim 1 , further comprising:
a rear fastening pin coupled to the rear surface of the cage body in upward and downward directions; and
a rear rotating part mounted rotatably on the rear surface of the cage body via the rear fastening pin,
wherein the rear rotating part is configured to open or close the rear insertion hole, and when the rear rotating part is closed, the bone graft is not discharged outside the cage body through the rear insertion hole.
10 . The box-shaped spinal cage structure according to claim 1 , further comprising:
a rear lateral hole perforated in leftward and rightward directions in the rear surface of the cage body; and
a rear movable part disposed in the rear lateral hole to move left and right within the rear lateral hole,
wherein the rear movable part is configured to open or close the rear insertion hole, and when the rear movable part is closed, the bone graft is not discharged outside the cage body through the rear insertion hole.
11 . The box-shaped spinal cage structure according to claim 1 , further comprising:
a device fixing unit inserted into the rear insertion hole and configured to accommodate the bone graft therein; and
an impactor configured to enter an inside of the device fixing unit to insert the bone graft accommodated in the device fixing unit into the internal space of the cage body.