Second anterior cervical spine surgical instrument with headless, drill-tip bone fixation screws.

Claims

OCR09WP15 / 10 / 25691. Second anterior cervical spine surgical device with headless drill-end screws. It consists of a headless screw (1) whose proximal diameter is greater than its distal diameter, and the headless screw (1) is provided with two threads, proximal (13) and distal (14), where the proximal (13) and distal (14) threads have different pitches to create compression between the fractured bone fragments, and the area between the proximal (13) and distal (14) threads of the headless screw (1) is provided as a smooth cylindrical shape to support the fracture site, and a targeting device (2) which consists of at least two targeting pieces (21) with beveled, angled ends that are adjustable in degree and depth to determine the alignment of the bone penetration, through which the headless screw (1) is inserted to anchor to the bone.2.Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the headless screws (1) are provided with an internal hole (11) for insertion of a guide wire (41).

3. Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the headless screws (1) are provided with a pointed end (12) consisting of at least one pointed end.

4. Second anterior cervical spine surgical device with headless drill-end screws according to claim 3, in which the headless screws (1) are provided with a pointed end (12) consisting of two to four pointed ends.

5. Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the headless screws (1) are provided with a diameter of between 3 and 4.5 mm. 6.

7. Second anterior cervical spine surgical device with headless drill-tip bone fixation screws according to Premise 1, in which the headless bone fixation screws (1) are provided with a length of 25 to 45 mm.

8. Second anterior cervical spine surgical device with headless drill-tip bone fixation screws according to Premise 1, in which the headless bone fixation screws (1) are provided with a proximal thread pitch (13) of 0.5 to 1 mm.

9. Second anterior cervical spine surgical device with headless drill-tip bone fixation screws according to Premise 1, in which the headless bone fixation screws (1) are provided with a proximal thread pitch (14) of 1 to 2 mm.

10. Second anterior cervical spine surgical device with headless drill-tip bone fixation screws according to Premise 1, in which the headless bone fixation screws (1) are provided with a proximal thread length (13) of 10 to 30 mm.Second anterior cervical spine surgical device with headless drill-end screws according to Precept 1 in which the headless screws (1) are provided with a thread length of the terminal thread (14) between 5 and 10 millimeters.

11. Second anterior cervical spine surgical device with headless drill-end screws according to Precept 1 in which the area between the proximal thread (13) and terminal thread (14) of the headless screw (1) is a smooth cylindrical shape and is provided with a length between 5 and 10 millimeters.

12. Second anterior cervical spine surgical device with headless drill-end screws according to Precept 1 in which the headless screws (1) are provided with an angled groove (16) at the proximal thread (13) and terminal thread (14) for self-threading.13.Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the targeting aid (2) is provided in a two-tube configuration, consisting of two targeting elements (21), the ends of which the targeting elements (22) are beveled at an angle of 15 to 25 degrees to the axis of the targeting element (22).

14. Second anterior cervical spine surgical device with headless drill-end screws according to claim 13, in which the two-tube targeting aid (2) is provided in a mid-axis along the length of each targeting element (21), beveled at an angle of 5 to 10 degrees to each other.

15. Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the targeting aid (2) is provided in a joint (23) with a locking mechanism, where the joint (23) consists of channels or holes that support the installation of the targeting element (21), and at least one locking mechanism at the joint (23) is provided to hold the axis of the targeting element (21).16.Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the targeting aid (2) provides a depth adjustment mechanism, in which one end of the targeting element (21) has a depth adjustment thread (26) which acts as a rotating mechanism to adjust the targeting element (21) to move along its axis, in which the targeting element (21) has a groove (27) which is carved and has a depth scale around the groove (27). This scale is used to indicate the current position of the adjustment, and the groove (27) works in conjunction with a locking mechanism to allow for the selection and fixation of the depth position.

17. Second anterior cervical spine surgical device with headless drill-end screws according to claim 1, in which the targeting aid (24) (2) provides an internal guide tube inside the removable targeting element (21) to open a slot for inserting headless drill-end screws (1).18.Second anterior cervical spine surgical device with headless drill-type bone fixation screws according to claim 1, in which the targeting device (2) is incorporated with a guide screw holder containing a guide needle (25) mounted between the targeting elements (21), the guide needle (25) is provided with adjustable depth for determining the bone drilling position.

19. Second anterior cervical spine surgical device with headless drill-type bone fixation screws according to claim 1, in which the tissue speculum (3) is incorporated with a curved plate in the shape of a cone (31) used to open the surgical passage and support the installation of the targeting device (2) in the proper position.

20. Second anterior cervical spine surgical device with headless drill-type bone fixation screws according to claim 19, in which the tissue speculum (3) is provided from radiopaque material.21.Second anterior cervical spine surgical device with headless drill-type bone fixation screws according to claim 1, which is further incorporated with a drilling instrument with guide wire retrieval mechanism (4) which is provided for drilling the bone and simultaneously inserting the guide wire (41) through the designated axis via a targeting aid (2) to support the insertion of headless bone fixation screws (1).

22. Second anterior cervical spine surgical device with headless drill-type bone fixation screws according to claim 21, which is incorporated with a drilling instrument with guide wire retrieval mechanism (4) 23. Second anterior cervical spine surgical device with drill-end headless screws according to claim 22, in which the wire clamping mechanism (43) has a cylindrical part with a slot for inserting the guide wire (41) and a wire clamping mechanism (43) mounted on the handle (44), with the handle (44) being the main structure that integrates all components and mechanisms together.

24. Second anterior cervical spine surgical device with drill-end headless screws according to claim 22, in which the wire clamping mechanism (43) has a cylindrical part with a multi-angle slot and a hole at the center which works in conjunction with a rotating ring (45) to clamp the mechanism to lock for inserting the guide wire (41). 24.Second anterior cervical spine surgical device with headless drill-end screws according to claim 23, in which a cylindrical element with multi-angled grooves is provided with a central hole of diameter between 0.8 and 1.5 mm.

25. Second anterior cervical spine surgical device with headless drill-end screws according to claim 1 or 19, in which a targeting device (2) and a tissue speculum (3) are further incorporated with a quick-locking and unlocking mechanism (5), in which the quick-locking and unlocking mechanism (5) is provided with a handle (51), in which the end of the handle (51) is incorporated with a crowned ratchet socket (52) which is connected to an internal threaded tube (53), in which the crowned ratchet socket (52) is supported for assembly into the crown of another device to be fitted;

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