TWI773142B - Bone locking system and method - Google Patents

Abstract

A bone locking system, which is used to join multiple broken bones, includes at least one self-tapping screw sleeve, the self-tapping screw sleeve is a cylindrical structure, and an external thread portion is arranged on the outer side of the self-tapping screw sleeve, and the external thread portion is recessed with at least one Self-tapping groove, the inner side of the self-tapping screw sleeve has an internal thread part, the inner top of the self-tapping screw sleeve has a tool part, the self-tapping screw sleeve is embedded in the cortical bone part of each broken bone; and at least one fixing screw, which corresponds to the self-tapping In the inner thread part of the screw sleeve, the fixing screw locks the self-tapping screw sleeve to connect each broken bone. The process of the present invention is to embed a self-tapping screw sleeve in the cortical bone part after drilling each broken bone, and then lock the broken bone with screws. The present invention can add a bone plate with a fixing hole according to the needs, so that the fixing screw can pass through After passing through the bone plate, lock the self-tapping screw sleeve to join each broken bone. The invention can shorten the length of the fixation screw, reduce the degree of combination between the fixation screw and the bone plate due to tissue proliferation, so that the fixation screw and the bone plate can be smoothly taken out after the broken bone is healed, and the loosening of the fixation screw can be avoided.

Description

Bone locking system and method

The present invention relates to a system and method for fixing broken bones, especially a bone locking system and method which can increase the locking strength and guiding effect.

When the bone is damaged and broken due to trauma, disease or various operations, in order to allow the broken bone to heal stably and be close to its original appearance, bone plates and fixing screws are often used to fix the bone fragments. Since the bone marrow is relatively loose, the conventional fixation screw A in the first figure needs to penetrate the bone, so that both ends of the conventional fixation screw A are locked in the hard outer cortical portion of the bone, so as to stably fix the bones The fragments cannot be twisted by force to avoid the collapse of the bone; however, the length and area of contact between the conventional fixation screw A and the bone are quite large. When the conventional fixation screw A needs to be removed after the bone healing is completed, the conventional fixation screw A It is easy for A and the bone plate to be combined with each other, or the fixed screw A may have broken teeth, misaligned teeth, etc., so that the conventional fixed screw A and the bone plate are not easy to be taken out. It may also cause secondary injury when the plate is used; or when the patient has osteoporosis or the cortical bone is too thin, as shown in the second figure, the conventional fixing screws A1 may loose or slip from the broken bone. .

In view of this, the inventors of the present invention have devoted themselves to research and design, and hope to provide a bone locking system and method that can reduce the occurrence of screw and bone plate combination, and can increase the occlusal strength of the bone screw, which is the purpose of the present invention. The motive of the invention of research and innovation.

The main purpose of the bone locking system of the present invention is to provide a bone locking system and method, which replaces the conventional screw method with a combination of a self-tapping screw sleeve and a screw, which can increase the occlusal strength and guiding effect of the bone screw, and remove the screw and the bone. It is less laborious and reduces secondary damage when boarding.

The bone locking system of the present invention, which is used for joining multiple broken bones, comprises at least one self-tapping screw sleeve, the self-tapping screw sleeve is a cylindrical structure, and the outer side of the self-tapping screw sleeve has an external thread portion, and the external thread portion is recessed. At least one self-tapping groove, the inner side of the self-tapping screw sleeve has an internal thread portion, the inner top of the self-tapping screw sleeve has a tool portion, the self-tapping screw sleeve is embedded in the cortical bone part of each broken bone, and each tapping groove can be filled and self-tapping The screw sleeve is locked into the broken bone generated during tapping of each broken bone, so that the self-tapping screw sleeve is stably embedded in each broken bone; and at least one fixing screw, which corresponds to the inner thread part of the self-tapping screw sleeve, is used to fix the screw lock The self-tapping screw sleeve is used to connect each broken bone, and the self-tapping screw sleeve can form a high-strength internal threaded hole in each broken bone for each fixing screw to be locked, so that each fixing screw does not need to penetrate each broken bone.

The bone locking system of the present invention can optionally add a bone plate. The bone plate has a plurality of fixing holes. After each fixing screw passes through the fixing holes, the respective tapping sleeves are locked and the bone plate is clamped by force to join the broken bones.

The steps of the bone locking method of the present invention include: drilling: using a guide gauge to drill at least one installation groove in each broken bone, the installation groove does not penetrate each broken bone; locking the self-tapping screw sleeve: locking in the installation groove A self-tapping screw sleeve, the self-tapping screw sleeve is embedded in the cortical bone part of each broken bone, the self-tapping screw sleeve is a cylindrical structure, and the outer side of the self-tapping screw sleeve has an external thread part, and the external thread part can be a self-tapping thread, The external thread part is also recessed with at least one self-tapping groove, the inner side of the self-tapping screw sleeve has an internal thread part, and the inner top of the self-tapping screw sleeve has a tool part, and the tool part is used for a tool to rotate the self-tapping screw sleeve; At least one fixing screw locks the self-tapping screw sleeves in the installation grooves to engage each broken bone, and the fixing screws correspond to each inner thread portion of the self-tapping screw sleeves.

The bone locking method of the present invention can also add a step of placing a bone plate as required. The step of placing the bone plate is after the step of locking the self-tapping screw sleeve and before the step of locking. The step of placing the bone plate includes: placing at least a bone plate, the bone plate has a plurality of fixing holes, and each installation slot corresponds to the position of each fixing hole; the locking step further includes: passing a plurality of fixing screws through each fixing hole and then locking the respective taps in each installation slot The screw sleeves clamp the bone plates with force to join each broken bone, and each fixing screw corresponds to each inner thread portion of the respective tapping screw sleeve.

The invention firstly implants the self-tapping screw sleeve, and places the bone plate according to the situation, so that each fixing screw can be easily locked in and closely attached to the bone plate, and the bone plate and each fixing screw can also be easily removed when the bone plate and each fixing screw are removed. When the fixation screw is aligned with the bone plate, it is often difficult to remove the broken bone after recovery because the conventional fixation screw and the fixing holes on the bone plate are blocked, or because the conventional fixation screw has broken teeth, wrong teeth, etc. Know the condition of fixation screws and bone plates.

The self-tapping screw sleeve can form a high-strength internal threaded hole in each broken bone for the fixing screw to lock, so that the fixing screw does not need to penetrate each broken bone, so as to reduce the combination between the fixing screw and the bone plate due to tissue proliferation It is easier to remove the fixation screw and bone plate after the broken bone is healed, and it can avoid the loosening or slipping of the fixation screw when the patient has osteoporosis or the cortical bone is too thin; reducing the depth of drilling can also speed up the fracture Bone healing. The self-tapping screw sleeves can be made of non-toxic materials and placed in each broken bone for use in the future when the broken bone needs to be adjusted. The respective tapping grooves on the outside of the self-tapping screw sleeve can be filled and locked into the broken bones generated when tapping each broken bone, so that the self-tapping screw sleeve can be embedded in each broken bone more stably. Drilling with a guide gauge ensures that the angle of the drilled hole does not deviate from the intended angle.

The present invention can be used in various parts of the body, including the spine, and is also suitable for fractures caused by various traumas.

The tool part can be in the shape of a star-shaped hole with threads, and the tool part can be used for a star-shaped tool to rotate and lock the self-tapping screw sleeve into the installation groove. The self-tapping groove can be square and is recessed at the bottom end of the external thread portion.

In order to further understand the features, characteristics and technical content of the present invention, please refer to the following detailed description of the present invention.

Please refer to the third figure, which discloses the drawings of the embodiments of the present invention, the embodiment (1) of the bone locking system of the present invention, which is used for joining a plurality of broken bones B, comprising at least one self-tapping screw sleeve 11, a self-tapping screw The sleeve 11 is a cylindrical structure, and the outer side of the self-tapping screw sleeve 11 has an external thread portion 111. The external thread portion 111 can be a self-tapping thread. The external thread portion 111 is recessed with at least one self-tapping groove 112. In this embodiment, the external thread The bottom end of the part 111 is recessed with three square self-tapping grooves 112, and the respective tapping grooves 112 on the outer side of the self-tapping screw sleeve 11 can be used for filling the broken bone generated when the self-tapping screw sleeve 11 is locked into each broken bone B and tapped. To make the self-tapping screw sleeves 11 more stably embedded in each broken bone B, the respective tapping grooves 112 in this embodiment (1) are square grooves, but the present invention does not limit the shape of the respective tapping grooves 112; the self-tapping screw sleeves 11 There is an inner thread portion 113 on the inner side, and a tool portion 114 is arranged on the inner top of the self-tapping screw sleeve 11. The self-tapping screw sleeve 11 is embedded in each broken bone B with the tool portion 114 facing outward, and the self-tapping screw sleeve 11 is locked in each broken bone B. In the cortical part of the broken bone B, in this embodiment, the tool part 114 is in the shape of a star-shaped hole with threads, and the tool part 114 is used for a star-shaped tool to rotate the self-tapping screw sleeve 11 to embed the self-tapping screw sleeve 11. In the cortical bone part of the broken bone B, the thread of the tool part 114 is the same as that of the internal thread part 113; and at least one fixing screw 12, which corresponds to each internal thread part 113 of the self-tapping screw sleeve 11, and the fixing screw 12 locks the self-tapping screw The sleeve 11 is used to connect each broken bone B, and the self-tapping screw sleeve 11 can form a high-strength internal threaded hole in each broken bone B for the fixing screw 12 to be locked, so that the fixing screw 12 does not need to penetrate each broken bone B, and can avoid When the patient has osteoporosis or the cortical bone is too thin, the fixing screw 12 may loosen or slip off.

Embodiment (1) of the bone locking system of the present invention further includes a bone plate 1, which has a plurality of fixing holes 10. The plurality of fixing holes 10 allow the bone plate 1 of the present invention to correspond to broken bones B at various fracture positions. The shape of the bone plate 1 and the distribution and number of the fixation holes 10 are not limited. The shape of the bone plate 1 and the distribution and number of the fixation holes 10 can be adjusted according to the shape of the bones of the used part, such as the spine, the palm or the leg. Bone plate 1 with different shapes can be used respectively. When using the bone plate 1, the installation slot 2, the self-tapping screw sleeve 11 and the fixing screw 12 can be respectively plural to fix the bone plate 1, and each fixing screw 12 passes through each fixing hole. After 10, lock the respective tapping sleeves 11 and apply force to clamp the bone plate 1 to join the broken bones B. Each broken bone B can be a vertebra respectively, so that the present invention can be used in spinal surgery such as spinal fusion and not limited to treating fractures, and the installation groove 2 can be drilled on the front, side or back of each vertebra.

As shown in the fourth figure, the bone locking method of the present invention is used to join a plurality of broken bones B. The steps of the bone locking method include: drilling a hole S1 : using a guide D to drill at least one hole in each broken bone B Installation slot 2, the installation slot 2 does not penetrate each broken bone B; lock the self-tapping screw sleeve S2: lock a self-tapping screw sleeve 11 in the installation slot 2, and the self-tapping screw sleeve 11 is locked on the cortex of each broken bone B In the part of the bone, the self-tapping screw sleeve 11 is a cylindrical structure, and the outer side of the self-tapping screw sleeve 11 has an external thread portion 111, the external thread portion 111 can be a self-tapping thread, and the external thread portion 111 is recessed with at least one self-tapping groove. 112. There is an inner thread part 113 on the inner side of the self-tapping screw sleeve 11, and a tool part 114 is provided on the inner top of the self-tapping screw sleeve 11. The tool part 114 is used for a tool to rotate the self-tapping screw sleeve 11, and the self-tapping groove 112 can be used for filling and self-tapping. The screw sleeve 11 is locked into the broken bone generated when tapping each broken bone B, so that the self-tapping screw sleeve 11 is stably embedded in each broken bone B; and locking S4: at least one fixing screw 12 is locked in the installation slot 2 The self-tapping screw sleeve 11 in the middle is used to connect each broken bone B, and the fixing screw 12 corresponds to the internal thread portion 113 of the self-tapping screw sleeve 11 .

The embodiment (1) of the bone locking method of the present invention further has a step S3 of placing the bone plate. After the step of locking the self-tapping screw sleeve S2 and before the step of locking S4, the step of placing the bone plate S3 includes: in each broken bone B At least one bone plate 1 is placed above it, the bone plate 1 has a plurality of fixing holes 10, the number of the installation grooves 2 and the self-tapping screw sleeves 11 are respectively plural, and each installation groove 2 corresponds to the position of each fixing hole 10; Step S4 further includes: inserting a plurality of fixing screws 12 through each fixing hole 10, locking the respective tapping sleeves 11 in each installation slot 2, and applying force to clamp the bone plate 1 to join each broken bone B, and each fixing screw 12 Corresponding to each internal thread portion of the respective tapping sleeve 11 . If the operation using the bone plate 1 is not required, the step of placing the bone plate S3 can be omitted. In the third figure, the step of placing the bone plate S3 is indicated by a dashed frame and can be omitted.

In the fifth figure, it can be seen that in the drilling step S1 of the present invention, at least one installation slot 2 is drilled in each broken bone B by using the drill needle C and the guide D, and the drilling S1 using the guide D can ensure The drilled installation grooves 2 are at the correct angle. There are two installation grooves 2 in this embodiment, and it can be seen that each installation groove 2 does not penetrate through each broken bone B. As shown in FIG.

In the sixth figure, it can be seen that in the step S2 of locking the self-tapping screw sleeve of the present invention, a self-tapping screw sleeve 11 is respectively locked in each installation slot 2, and the tapping screw sleeve 11 is locked on the side of each broken bone B. In the part of the cortical bone, the tapping sleeves 11 are respectively a cylindrical structure as described above, and there is an external thread part 111 on the outer side of each tapping sleeve 11, and each external thread part 111 is recessed with at least one self-tapping groove 112. In the example, the respective tapping grooves 112 are square and are recessed at the bottom end of each external thread portion 111 and the number is three. The grooves 112 are embedded in each broken bone B, the inner side of each tapping sleeve 11 has an inner thread portion 113 respectively, and the inner top of each tapping sleeve 11 has a tool portion 114 respectively. In the screw sleeve 11, in this embodiment, each tool part 114 is in the shape of a star-shaped hole with threads, the thread of each tool part 114 is the same as that of each internal thread part 113, and each tool part 114 is respectively used for a star-shaped tool to rotate each. The tapping sleeves 11 are used to lock the respective tapping sleeves 11 into the broken bones B, and the respective tapping grooves 112 on the outside of the respective tapping sleeves 11 can be filled and locked into the broken bones generated when tapping the broken bones B, so that the respective tapping sleeves 11 can be tapped. 11 is more stably embedded in each broken bone B, and the respective tapping sleeves 11 can be made of non-biological toxic materials and left in each broken bone B for use when readjusting each broken bone B in the future.

In Figure 7, it can be seen that in the step of placing the bone plate S3 of the present invention, at least one bone plate 1 is placed above each broken bone B, the bone plate 1 has a plurality of fixing holes 10, and each installation slot 2 corresponds to each The position of the fixing holes 10, the present invention does not limit the shape of the bone plate 1 and the distribution and number of the fixing holes 10. The shape of the bone plate 1 and the distribution and number of the fixing holes 10 can be adjusted according to the shape of the bone at the site of use. Different shapes of bone plates 1 can be used in the spine, palm or leg, etc. When using the bone plate 1, the self-tapping screw sleeves 11 and the fixing screws 12 can be respectively plural to fix the bone plate 1, and each fixing screw 12 is threaded through After passing through the fixing holes 10 , the respective tapping sleeves 11 are locked and the bone plate 1 is clamped by force to join the broken bones B.

In the eighth figure, it can be seen that in the locking step S4 of the present invention, the plurality of fixing screws 12 are passed through the fixing holes 10 and then the respective tapping sleeves 11 in the installation slots 2 are locked and the bone plate 1 is clamped by force. In order to join each broken bone B by the bone plate 1 , each fixing screw 12 corresponds to each internal thread portion 113 of the respective tapping sleeve 11 .

The respective tapping sleeves 11 can respectively form high-strength internal threaded holes in each broken bone B for each fixing screw 12 to be locked, so that each fixing screw 12 does not need to penetrate each broken bone B, so that the number of fixing screws 12 can be reduced. When the bone plate 1 is combined with each other, it is easier to remove the fixing screw 12 and the bone plate 1 after the broken bone B is healed. Since it is not necessary to drill through each broken bone B, reducing the depth of drilling can also speed up the healing of each broken bone B.

In the ninth figure, in the second embodiment of the bone locking method of the present invention, it can be seen that the present invention can be used in a course of treatment that does not require the use of the bone plate 1, only using a plurality of fixing screws 12 and a plurality of self-tapping screw sleeves 11 , This embodiment (2) is for treating the place where the femur is combined with the hip joint, and the present invention can avoid the loosening or slipping of the conventional fixing screw A1 as shown in the second figure.

In Figure 10, in the third embodiment of the bone locking method of the present invention, it can be seen that the present invention can stably fix the bone plate 1, and each fixing screw 12 is also stably locked to the respective tapping sleeve 11. The present invention can prevent the loosening or slipping of each fixing screw 12 from occurring.

In Figures 11 to 13, each broken bone B in the embodiments (4), (5) and (6) of the bone locking method of the present invention can be a vertebra, so that the present invention can be used in spinal surgery For example, spinal fusion is not limited to the treatment of fractures. The installation slot 2 and the self-tapping screw sleeve 11 can be embedded in the front, side or back of the vertebra according to the needs of the operation and can be matched with the bone plate 1, the bone nail (not shown) and the nail rod (not shown in the drawing). ) and other equipment used.

In the present invention, the self-tapping screw sleeve 11 is first implanted, and the bone plate 1 is placed according to the situation, so that the fixing screws 12 can be easily locked in and tightly fit the bone plate 1, and the bone plate 1 and the fixing screws 12 can also be easily removed when the bone plate 1 and the fixing screws 12 are removed. ; When the conventional fixation screw A aligns the bone plate 1, it is often because the conventional fixation screw A and the fixing holes 10 on the bone plate 1 are seized, or because the conventional fixation screw A is broken or misaligned. In the case of teeth, etc., it is difficult to take out the conventional fixing screw A and the bone plate 1 after the broken bone B is restored. The self-tapping screw sleeve 11 also has the function of guiding the fixing screw 12; and it can prevent patients from osteoporosis or cortical bone too much. When thin, each fixing screw 12 may be loosened or slipped from each broken bone B.

However, the above descriptions are only preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention. Any changes and modifications that can be obviously made by those who are accustomed to the industry should be regarded as not departing from the essence of the present invention.

1: Bone Plate 10: Fixing holes 11: Self-tapping screw sleeve 111: External thread part 112: Self-tapping slot 113: Internal thread part 114: Tools Department 12: Fixing screws 2: Mounting slot A: conventional fixing screws A1: conventional fixing screws B: broken bone C: Drill D: guide gauge S1: Drilling holes S2: Lock in the self-tapping screw S3: Place the bone plate S4: Lock

The first figure is a schematic diagram (1) of a conventional method of fixing bones. The second figure is a schematic diagram (2) of a conventional method of fixing bones. The third figure is a perspective view of the components of the embodiment (1) of the bone locking system of the present invention. The fourth figure is a flowchart of the embodiment (1) of the bone locking method of the present invention. The fifth figure is a schematic flowchart (1) of the embodiment (1) of the bone locking method of the present invention. The sixth figure is a schematic flowchart (2) of the embodiment (1) of the bone locking method of the present invention. Fig. 7 is a schematic flowchart (3) of the embodiment (1) of the bone locking method of the present invention. Figure 8 is a schematic flowchart (4) of the embodiment (1) of the bone locking method of the present invention. The ninth figure is a schematic diagram of the embodiment (2) of the bone locking method of the present invention. Figure 10 is a schematic diagram of Embodiment (3) of the bone locking method of the present invention. Figure 11 is a schematic diagram of Embodiment (4) of the bone locking method of the present invention. The twelfth figure is a schematic diagram of the embodiment (5) of the bone locking method of the present invention. Figure 13 is a schematic diagram of the embodiment (six) of the bone locking method of the present invention.

none

1: Bone Plate

10: Fixing hole

11: Self-tapping screw sleeve

111: External thread part

112: Self-tapping slot

113: Internal thread part

114: Tools Department

12: Fixing screws

Claims (7)

A bone locking system, which is used to engage a plurality of broken bones, comprises: at least one self-tapping screw sleeve, the self-tapping screw sleeve is a cylindrical structure, and an external thread part is arranged on the outer side of the self-tapping screw sleeve, and the external thread part is parallel to the At least one self-tapping groove is recessed, the inner side of the self-tapping screw sleeve has an internal thread portion, the inner top of the self-tapping screw sleeve has a tool portion, the self-tapping screw sleeve is embedded in the cortical bone portion of each broken bone, and the self-tapping screw sleeve is embedded in the cortical bone portion of each broken bone. Tapping grooves are used for filling the broken bone generated when the self-tapping screw sleeve is locked into each broken bone and tapping, so that the self-tapping screw sleeve is stably embedded in each of the broken bones; and at least one fixing screw, which corresponds to the self-tapping screw. The internal thread portion of the tapping sleeve, and the fixing screw locks the self-tapping screw sleeve to engage each of the broken bones. The bone locking system according to claim 1, wherein the tool portion is in the shape of a star-shaped hole with threads, and the tool portion is used for a star-shaped tool to rotate the self-tapping screw sleeve. The bone locking system according to claim 1, further has a bone plate, the bone plate has a plurality of fixing holes, the fixing screws pass through the fixing holes and then lock the self-tapping screw sleeve and force the bone plate to clamp the bone plate. Join each of the broken bones. The bone locking system of claim 1, wherein each of the broken bones is a vertebra. A bone locking method for engaging a plurality of broken bones, the steps of the bone locking method comprising: drilling: using a guide to drill at least one installation groove in each of the broken bones, each of the installation grooves does not penetrate through each of the broken bones ; Lock into the self-tapping screw sleeve: lock a self-tapping screw sleeve in the installation groove, the self-tapping screw sleeve is embedded in the cortical bone part of each broken bone, the self-tapping screw sleeve is a cylindrical structure, and the self-tapping screw sleeve is a cylindrical structure. There is an external thread part on the outside of the tapping sleeve, At least one self-tapping groove is concavely formed on the external thread portion, the inner side of the self-tapping screw sleeve has an internal thread portion, and the inner top of the self-tapping screw sleeve has a tool portion, and the tool portion is used for a tool to rotate the self-tapping screw sleeve, The self-tapping groove is used to fill the broken bone generated when the self-tapping screw sleeve is locked into each broken bone tapping, so that the self-tapping screw sleeve is stably embedded in each of the broken bones; locking: at least one fixing screw The self-tapping screw sleeve in the installation groove is locked to engage each of the broken bones, and the fixing screw corresponds to the inner thread portion of the self-tapping screw sleeve. The bone locking method according to claim 5, further comprising a step of placing a bone plate, the step of placing the bone plate after the step of locking the self-tapping screw sleeve and before the step of locking, the step of placing the bone plate comprising: At least one bone plate is placed above the broken bone, the bone plate has a plurality of fixing holes, the number of the installation grooves and the self-tapping screw sleeves are respectively plural, and the installation grooves correspond to the positions of the fixing holes; the The locking step further includes: inserting a plurality of fixing screws through the fixing holes and then locking the self-tapping screw sleeves in the installation slots and applying force to clamp the bone plate to engage the broken bones. The screws correspond to the inner thread portions of the self-tapping screw sleeves. The bone locking method according to claim 5, wherein each of the broken bones is a vertebra.

Images