ES2803953T3 - Surgical device for osteotomies - Google Patents

Abstract

Surgical device for osteotomies (2) comprising: a first body component (22) having an upper guide edge (222) to form a cutting path, wherein said upper guide edge (222) has a first correction perforation (223), a second body component (24) having a lower guide edge (241) disposed below said upper guide edge (222), where a guide groove (50) is formed between said upper guide edge (222) and said lower guide edge (241) for guiding a saw blade to perform a cutting procedure, wherein lower guide edge (241) has a second correction hole (242); a hinge pin guide component (28) disposed on the surface of said second body component (24), wherein said hinge pin guide component (28) comprises a third correction bore (281) extending towards the rear of said guide groove (50), where said third correction bore (281) engages a preoperative hinge shaft (30) for osteotomy as a hinge when opening a bone; wherein a corrective angle (L, N) is formed between a first hole axis (A1) of said first correction hole (223) and a second hole axis (A2) of said second correction hole (242), characterized due to the fact that said surgical device for osteotomies (1, 2, 3) is configured in such a way that, when an open angle of a space of said osteotomy is the same as that of a preoperative planning correction angle (M) , said first hole axis (A1) of said first correction hole (223) and said second hole axis (A2) of said second correction hole (242) will coincide, so that an alignment rod (20 ) between said first correction hole (223) and said second correction hole (242) only when a tibia is opened at said preoperative planning correction angle (M) by said first body component (22) and said second body component body (2 4).

Description

DESCRIPTION

Surgical device for osteotomies

TECHNICAL FIELD

[0001] The present invention relates to a surgical device for osteotomies. More specifically, it is related to a surgical device for osteotomies and tailor-made for the specific patient.

BACKGROUND

[0002] The knee is one of the most weight bearing joints in the body. If the knee has had sports injuries, or approaching middle age, it is likely to cause wear of the articular cartilage and result in a symptom of knee pain. Daily activity is limited. This is the cause of degenerative joint disease.

[0003] The common treatment is artificial joint arthroplasty involving a large bone resection for the fixation of metal and polymer implants. Due to wear on the implant, the maximum duration of artificial joint replacement is only twenty years, and it can cause complications such as infection, osteolysis, and osteoporosis, which will require revision surgery. Also, some patients with early degenerative joint disease, in fact, only wear away at the medial joint surface. It is not necessary to remove the entire joint for arthroplasty. For example, the high tibial osteotomy is commonly used for patients with degenerative medial osteoarthritis of the knee.

[0004] The high tibial osteotomy is a surgery to realign the biomechanical axis by cutting and opening in the medial proximal tibia, where sometimes the opening space must be filled with bone grafts. The osteomized tibia is then fixed using a bone plate. This surgical procedure avoids bone resection and preserves the knee joint. It is a better option for the patient with medial knee pain.

[0005] However, the high tibial osteotomy requires cutting and opening in the proximal tibia. The cutting position, direction, depth, and height of the surgical opening are important and must be carefully planned, but are difficult to perform accurately. Currently, the parameters mentioned above can only be verified intraoperatively by X-ray and the experience of the surgeon. The amount of biomechanical axis correction and the parameters mentioned above are all different for each patient; therefore, the design of surgical instruments must also be considered.

In a US patent application, 2008 / 0262500A1, a cutting guide for performing a bone osteotomy procedure is disclosed. The cutting guide includes a first arm having a first cutting guide surface formed thereon, a second arm having a second cutting guide surface formed therein pivotally connected to the first arm, and a distractor operatively connected to the first. arm. The cutting guide is adapted to be fixed to the bone so that the first cutting guide surface is open to the second cutting guide surface. The first arm and the second arm are rotatable with respect to each other in such a way that manipulation of the distractor creates a force between the first arm and the second arm that causes the rotation of the first arm and the second arm with respect to each other. A method of using the cutting guide in a bone osteotomy procedure is also described. In an international patent application, 2015 / 162437A1, a device is described that combines a bone cutting guide and a spacer comprising a first and a second arm and a hinge that connects the first ends of said first and second arms, in the that the second ends of said first and second arms each comprise a bone fixation mechanism, wherein said first and second arms are movable around said hinge between a guiding position in which they are arranged parallel to each other and define a bone cutting guide groove between them, and such that said bone fixation mechanisms are adjacent to each other, and an extended position in which they are arranged at an angle to each other and said bone fixation mechanisms are spaced apart.

SUMMARY OF THE INVENTION

[0006] In view of the above problems, the present invention provides a surgical device for osteotomies as defined in claim 1. Preferred embodiments of the invention are defined in the dependent claims. Provides guidance for the saw blade to perform high tibial osteotomy, but is not limited to, as the osteotomy surgical device can be used for other bones such as: femur, fibula, humerus, ulna, radius, clavicle, scapula, etc. The tibia is described in the preferred embodiment of the present invention. The exterior design has features that can help the clinician determine the cutting position, direction and depth, the opening height accurately. Compared to conventional surgery of hands-free, the present invention is more accurate, saves time, is easy to learn, and has low radiation exposure. Each device is tailor-made for the patient.

[0007] Compared with the conventional technique, the surgical device for osteotomies is manufactured by three-dimensional printing (3D printing) according to the skeletal image data of the patient, and the optimal cutting position is evaluated before the operation. The device can adapt well to the patient's bone. The surgeon can perform the first cutting position below the guide groove specified by the device. The guide groove allows the surgeon to perform the osteotomy with precision. It also provides a reference for calculating the angle of cut and depth. The side guide edge provides the reference for the second cut. Not only does it improve surgical precision and efficiency, but the present invention also standardizes the entire surgical procedure for surgeons.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008]

Figure 1A illustrates a front view of an osteotomy device, which is not part of the claimed invention.

Figure 1B illustrates a side view of an osteotomy device, which is not part of the claimed invention.

Figure 2 illustrates the position in which the cut should be made in the tibia.

Figure 3A illustrates a posterior view of an osteotomy device, which is not part of the claimed invention, when implemented in a tibia.

Figure 3B illustrates a side view of an osteotomy device, which is not part of the claimed invention, when implemented in a tibia.

Figure 4A illustrates a front view of an osteotomy device, not part of the claimed invention, prior to the surgical procedure.

Figure 4B illustrates a side view of an osteotomy device, not part of the claimed invention, prior to the surgical procedure.

Figure 5 illustrates an embodiment of the present invention.

Figure 6 illustrates another embodiment of the present invention when implemented.

Figure 7 illustrates a front view of another osteotomy device, which is not part of the claimed invention.

Figure 8A illustrates a side view of another osteotomy device, which is not part of the claimed invention.

Figure 8B illustrates the position in which the femur is to be cut when performing an osteotomy.

Figure 9A illustrates a front view of another osteotomy device, which is not part of the claimed invention.

Figure 9B illustrates a side view of the other osteotomy device, which is not part of the claimed invention.

DETAILED DESCRIPTION

[0009] Some preferred embodiments of the present invention will now be described in more detail. Only the osteotomy devices shown in Figures 5 and 6 are in accordance with the claimed invention. However, it should be recognized that the preferred embodiments of the present invention are provided for illustrative purposes rather than limiting the present invention.

[0010] Furthermore, the present invention can be practiced in a wide range of other embodiments besides those explicitly described, and the scope of the present invention is not expressly limited except as specified in the appended claims. Component design can be more complex in practice.

[0011] Furthermore, the major or minor number mentioned in the present specification is included in the number itself. It should be understood that this specification discloses certain methods and processes for carrying out the functions, and there are a variety of structures related to the disclosed structures that perform the same function. The structures mentioned above generally achieve the same result.

[0012] In the following, preferred embodiments of the present invention will be described in detail to fully illustrate the features and advantages of the present invention.

[0013] See FIG. 1A, FIG. 1B and FIG. 2. FIG. 1A illustrates a front view of an osteotomy device, which is not part of the claimed invention. FIG. 1B illustrates a side view of one embodiment of osteotomy device, which is not part of the claimed invention. FIG. 2 illustrates the position in which the cut should be made in the tibia.

[0014] The osteotomy surgical device 1 can be used in various osteotomy, correction or reduction surgeries. The osteotomy surgical device 1 can be used for various bones of the human body, such as: tibia B, femur D, fibula, humerus, ulna, radius, clavicle, scapula, etc., but is not limited to these. This provides a guide for the saw blade to perform a high tibial osteotomy of a tibia B. The first cutting position C1 and a second cutting position C2 on the tibia B are defined by the surgical device for osteotomies 1. The surgical device for osteotomies 1 comprises: a first body component 12, a second body component 14 and a plurality of fixation grooves 16. The first body component 12 is arranged above the first cutting position C1 and has a leading edge side 121 and an upper guide edge 122. The second body component 14 is disposed below the first cutting position C1 or below the upper guide edge 122 and has a lower guide edge 141. The lower guide edge 141 is disposed below the upper guide edge 122. The surfaces of the first body component 12 and the second body component 14 have the plurality of attachment grooves 16. The surgical device co for osteotomies 1 is fixed on the surface of tibia B by inserting a plurality of fixation pins into the plurality of fixation slots 16.

The upper guide edge 122 and the lower guide edge 141 extend outwardly from the first body component 12 and the second body component 14, respectively. There is a guide groove 50 between the upper guide edge 122 and the lower guide edge 141 to guide the saw blade to the first cutting position C1. The lateral guide edge 121 is used to guide the saw blade to the second cutting position C2. The upper guide edge 122, the lower guide edge 141 and the side guide edge 121 are used to form the cutting path. The saw blade cuts tibia B according to the first cutting position C1 and the second cutting position C2, thus performing the high tibial osteotomy.

[0016] See FIG. 3A and FIG. 3B. FIG. 3A illustrates a posterior view of an osteotomy device, not part of the claimed invention, when implemented in a tibia. FIG. 3B illustrates a side view of an osteotomy device, not part of the claimed invention, when implemented in a tibia. The first body component 12 further comprises a first correction hole 123. The first correction hole 123 is provided on the upper guide edge 122. The second body component 14 further comprises a second correction hole 142. The second correction hole Correction 142 is provided on the lower guide edge 141. The first correction hole 123 and the second correction hole 142 are designed to confirm the correction angle that opens intraoperatively in the high tibial osteotomy. For this reason, there is a regulation angle L between the first hole axis A1 of the first correction hole 123 and the second hole axis A2 of the second correction hole 142 (the hole axes A1, A2 and the angle of regulation are depicted in FIG. 5) In high tibial osteotomy, an osteotomy space has a preoperative planning correction angle M. When tibia B is opened by the first body component 12 and the second body component 14 With the correction angle M, the first hole axis A1 of the first correction hole 123 and the second hole axis A2 of the second correction hole 142 can coincide. An alignment bar 20 passes through the first correction hole 123 and the second correction hole 142 to ensure that the aperture has reached the correction angle. First of all, the size of the correction angle mentioned above is based on the correction angle M that tibia B needs to open in high tibial osteotomy. Second, the angle between the axis of the first correction perforation and the axis of the second correction perforation is determined according to the desired correction angle M and is performed. The alignment rod 20 can be inserted between the first correction hole 123 and the second correction hole 142 only when the tibia B is opened to the preoperative planning angle by the first body component 12 and the second body component 14.

[0017] See FIG.4A and FIG.4B. FIG. 4A illustrates a front view of an osteotomy device, not part of the claimed invention, prior to the surgical procedure. FIG. 4B illustrates a side view of an osteotomy device, not part of the claimed invention, prior to the surgical procedure. In the present invention, the first body component 12 and the second body component 14 are made by 3D printing. Since the first body component 12 and the second body component 14 must be connected to each other in surgery prior to the cutting procedure, the osteotomy surgical device 1 further comprises a connecting component 18. Before the cutting procedure, the first body component 12 and second body component 14 are connected by component 18 to ensure sufficient area to join the bone surface. The first body component 12 and the second body component 14 are attached to the patient's tibia prior to the high tibial osteotomy cutting procedure, and then the connecting component 18 is removed. However, the first body component 12 and the second body component 14 can be integrally manufactured. At this time, there is a connection part between the upper guide edge 122 and the lower guide edge 141, so the connection component 18 is not necessary. When the osteotomy is performed, the surgeon can directly cut the connecting part with the bone saw.

[0018] See FIG. 5 and FIG. 6. FIG. 5 illustrates an embodiment of the present invention. FIG. 6 illustrates an embodiment of the present invention when implemented.

[0019] The present invention further provides a surgical device for osteotomies 2 which can be used in various osteotomy, correction or reduction surgeries. The Osteotomy Surgical Device 2 can be used for various bones of the human body, such as: tibia B, femur D, fibula, humerus, ulna, radius, clavicle, scapula, etc., but is not limited to these. In the present embodiment, a guide is provided for the saw blade to perform a high tibial osteotomy of a tibia B. The first cutting position C1 and a second cutting position C2 on the tibia B are defined by the surgical device. for osteotomies 2. The surgical device for osteotomies 2 comprises: a first body component 22, a second body component 24, a plurality of fixation slots 26, and a hinge pin guide component 28. In this embodiment, the first body component 22 and the second body component 24 are connected by a connecting part. When the osteotomy is performed, the surgeon can cut directly the connecting part with the bone saw, but not necessarily. The first body component 22 and the second body component 24 can be used directly without using the connecting part. Furthermore, the first body component 22 and the second body component 24 may be connected in other ways.

The first body component 22 is disposed above the first cutting position C1 and has a lateral guide edge 221, an upper guide edge 222 and a first correction hole 223. The first correction hole 223 is connected to the first body component 22 by a first bar 224. The second body component 24 is disposed below the first cutting position C1 or below the upper guide edge 222 and has a lower guide edge 241 and a second perforation of correction 242. The lower guide edge 241 is disposed below the upper guide edge 222. A guide slot 50 is formed between the upper guide edge 222 and the lower guide edge 241. The second correction hole 242 is connected to the second body component 24 by a second bar 243. The surfaces of the first body component 22 and the second body component 24 have the plurality of attachment grooves 26. The device surgical instrument for osteotomies 2 is fixed on the surface of tibia B by inserting a plurality of fixation pins 40 into the plurality of fixation slots 26. A hinge pin guide component 28 is disposed on the surface of the second body component 24, comprises a third correction hole 281 extending towards the rear of the second cutting position C2 or the rear of the guide groove 50. The third correction hole 281 mates with the preoperative hinge axis 30 for high tibial osteotomy as the axis of rotation when opening tibia B. By inserting the pin as the axis 30 of the hinge, the position and direction of the hinge can be guaranteed intraoperatively as preoperative planning. When the saw blade has reached the pre-planned depth of cut, it will be locked by the hinge pin on hinge shaft 30 to ensure depth of cut and improve surgical precision. Furthermore, the predrilled hole can distribute stresses and prevent lateral cortical fracture of tibia B by opening the gap. The hinge pin guide component 28 and the second body component 24 are integrally formed or combined.

[0021] Upper guide edge 222 and lower guide edge 241 extend outwardly from first body component 22 and second body component 24, respectively. A guide groove 50 is formed between the upper guide edge 222 and the lower guide edge 241 to guide the saw blade to the first cutting position C1. The lateral guide edge 221 is used to guide the saw blade to the second cutting position C2. Upper guide edge 222, lower guide edge 241, and side guide edge 221 are used to form the cutting path. The saw blade cuts tibia B according to the first cutting position C1 and the second cutting position C2, thus performing the high tibial osteotomy.

[0022] In the present invention, the first correction hole 223 and the second correction hole 242 are designed to confirm the correction angle that opens intraoperatively in the high tibial osteotomy. For this reason, there is a regulation angle L between the first axis of hole A1 of the first correction hole 223 and the second axis of hole A2 of the second correction hole 242. When the tibia B is opened by the first component of body 22 and the second the body component 24 with the correction angle that is the same as the preoperative planning, the first hole axis A1 of the first correction hole 223 and the second hole axis A2 of the second correction hole 242 may match. An alignment bar 20 passes through the first correction hole 223 and the second correction hole 242 to ensure that the aperture has reached the correction angle. First, the size of the regulation angle L mentioned above is based on the correction angle that tibia B needs to open in the high tibial osteotomy. Second, the size of the regulation angle L is determined in accordance with the desired correction angle and performed. The alignment rod 20 can be inserted between the first correction hole 223 and the second correction hole 242 only when the tibia B is opened to the preoperative planning angle by the first body component 22 and the second body component 24.

[0023] See FIG.2, FIG. 3A, FIG. 3B and FIG. 7. Explains how to perform a high tibial osteotomy. In FIG.

2, the surgical devices for osteotomy 1,2 attached to the tibial position are located in the calf of the human body and near the knee on the medial side of the proximal end. However, the scope of their fixation is not limited to this, since they can also be attached to other positions of the other bones. In other words, the image shows that the positive side of FIG. 2 points to the inside of the human body. The left side of FIG. 2 points to the back of the human body. FIG. 3A and FIG. 3B correspond to the surgical device for osteotomies 1. FIG. 7 illustrates a front view of another osteotomy device, which does not form part of the claimed invention, when it is implemented and corresponds to the surgical device for osteotomies 2.

[0024] Surgical devices for osteotomies 1, 2 are based on tibial image information provided by patients with degenerative joint disease prior to surgery. Tibia B model was established using computer programs. The position of the first cutting position C1 and the second cutting position C2 is determined according to the tibia model B. The general structure of the surgical devices for osteotomies 1, 2 is custom made. The osteotomy surgical devices 1, 2 are designed to fit snugly to the surface of the patient's tibia B, and the 3D impression technique is used to construct a solid integrally formed or combined instrument.

[0025] When the surgical devices for osteotomy 1, 2 are arranged on the surface of the tibia of the patient, the surgeon inserts the saw blade and begins cutting according to the first cutting position C1 guided by the upper guide edge 122, 222 and lower guide edge 141, 241 of surgical osteotomy devices 1, 2. The surgeon can use upper guide edges 122, 222 and lower guide edges 141, 241 as a reference for the calculation of the depth of cut. Otherwise, by making a mark on the saw blade, surgeons can visually confirm that the depth of cut of the saw blade has reached the predetermined depth.

[0026] The saw blade continues to cut along the upper guide edge 122, 222 and the lower guide edge 141, 241 into the human body until the predetermined depth is reached. Part of the tibia B is cut along the second cutting position C2 guided by the lateral guide edges 121, 221 to create an upward cut. After cutting, the first cutting position C1 of tibia B is opened to the pre-operative planning correction angle M in case surgical devices for osteotomy 1, 2 are attached to tibia B. Alignment rod 20 is inserted through the first correction holes 123, 223 and the second correction holes 142, 242. After confirming the correction angle of the tibia B osteotomy, the gap can be repaired with the implant.

[0027] See FIG. 8A, FIG. 8B, FIG. 9A and FIG. 9B. FIG 8A illustrates a side view of the other embodiment of an osteotomy device, not part of the claimed invention, when implemented. FIG 8B illustrates the position in which the femur D should be cut when practicing the present invention. FIG 9A illustrates a front view of the osteotomy device, which is not part of the claimed invention, when implemented. FIG 9B illustrates a side view of the osteotomy device, which is not part of the claimed invention, when implemented.

[0028] The present description further provides a surgical device for osteotomies 3 that can be used in various osteotomy, correction or reduction surgeries. The Osteotomy Surgical Device 3 can be used for various bones in the human body, such as: tibia B, femur D, fibula, humerus, ulna, radius, clavicle, scapula, etc., but is not limited to these. In the present example, a guide is provided for a saw blade to perform the distal femoral osteotomy (OFD) of a femur D. The surgical device for osteotomies 3 comprises: a first body component 32, a second body component 34 and a plurality of fixing grooves 36. In this example, the first body component 32 and the second body component 34 are connected by a connecting part. When the osteotomy is performed, the surgeon can cut directly the connecting part with the bone saw, but not necessarily. The first body component 32 and the second body component 34 can be used directly without using the connecting part. Furthermore, the first body component 32 and the second body component 34 may be connected in other ways. FIGS. 8A to FIG. 9B show that the femur is the (femur) of the left thigh of the body near the knee. However, the scope is not limited to this, it can also be applied to other positions of other bones.

[0029] The aforementioned femur D is defined as a third cutting position C3 by the surgical device for osteotomies 3. The first body component 32 is arranged above the third cutting position C3 and has an upper guide edge 321 and a first correction perforation 322, where the first correction perforation 322 is connected to the first body component 32 by a first bar 323. The second body component 34 is disposed below the third cutting position C3 or below the edge of upper guide 321 and has a lower guide edge 341 and a second correction perforation 342. The lower guide edge 341 is disposed below the upper guide edge 321. The second correction perforation 342 is connected to the second body component 34 by a second rod 343. The surfaces of the first body component 32 and the second body component 34 have the plurality of attachment grooves 36, and the surgical osteotomy device 3 is attached to the surface of the femur D by inserting a plurality of locking pins 40 into the plurality of locking slots 36.

[0030] The upper guide edge 321 and the lower guide edge 341 extend outwardly from the first body component 32 and the second body component 34, respectively. A guide groove 50 is formed between the upper guide edge 321 and the lower guide edge 341 to guide the saw blade to the third cutting position C3. Upper guide edge 321 and lower guide edge 341 are used to form the cutting path. The saw blade cuts the femur D according to the third cutting position C3, thus performing the distal femoral osteotomy.

[0031] In the present example, the first correction hole 322 and the second correction hole 342 are designed to confirm the correction angle at which the femoral opening opens in the distal femoral osteotomy. For this reason, there is a regulation angle N between the first axis of hole A1 of the first correction hole 322 and the second axis of hole A2 of the second correction hole 342. In the distal femoral osteotomy, a space of the osteotomy has a preoperative planning correction angle. When the femur D is opened by the first body component 32 and the second body component 34 with the correction angle that is the same as the preoperative planning, the first hole axis A1 of the first correction hole 322 and the second hole axis A2 of the second correction hole 342 may coincide. An alignment bar 20 passes through the first correction hole 322 and the second correction hole 342 to ensure that the aperture has reached the correction angle. First, the size of the regulation angle N mentioned above is based on the correction angle that the femur D needs to open in the distal femoral osteotomy. Second, the size of the regulation angle N is determined according to the desired correction angle and performed. The alignment rod 20 can be inserted between the first correction hole 322 and the second correction hole 342 only when the femur D is opened to the preoperative planning angle by the first body component 32 and the second body component 34.

[0032] See FIG. 8A, FIG 8B, FIG. 9A and FIG. 9B. It is explained how to use the present example to perform the distal femoral osteotomy. In FIG. 8A and FIG. 8B, the surgical osteotomy device 3 attached to the femoral position is located on the left thigh of the human body and near the lateral distal end of the knee. However, the scope of application is not limited to this, as it can also be applied to other positions of other bones. In other words, the image shows that the positive side of FIG. 8A and FIG. 8B points to the human body. The left side of fig. 8A and FIG. 8B points to the anterior part of the human body.

[0033] The present example of the osteotomy surgical device 3 is based on femoral image information provided by patients with degenerative joint disease prior to surgery. Femur model D was established using computer programs. The position of the third cutting position C3 is determined according to the femur model D. The general structure of the surgical device for osteotomies 3 is custom made. The osteotomy surgical device 3 is designed to fit snugly to the surface of the patient's femur D, and then the three-dimensional impression technique is used to construct a solid integrally formed or combined instrument.

[0034] See FIG. 9A. The figure shows the completed cutting stroke E in the third cutting position C3. When the surgical osteotomy device 3 is disposed on the surface of the patient's femur, the surgeon inserts the saw blade and begins cutting according to the third cutting position C3 guided by the upper guide edge 321 and the guide edge. lower 341 of the osteotomy surgical device 3. The surgeon can use the upper guide edges 321 and the lower guide edges 341 as a reference for calculating the depth of cut. Otherwise, by making a mark on the saw blade, surgeons can confirm with the naked eye whether the depth of cut of the saw blade has reached the predetermined depth.

[0035] The saw blade continues to cut along the upper guide edge 321 and the lower guide edge 341. Then it cuts part of the femur D. The third cutting position C3 of the femur D opens to the correction angle of preoperative planning in case the surgical device for osteotomy 3 is attached to the femur D. The alignment rod 20 is then inserted through the first correction hole 322 and the second correction hole 342. After confirming the correction angle of the osteotomy of the femur D, the space can be repaired with the implant.

[0036] In summary, the present invention provides a surgical device for osteotomy 1, 2, 3. In one embodiment, it is tailored based on skeletal image information collected from patients with degenerative joint disease prior to surgery. surgery. The present invention can avoid damaging the ligament during surgery. It can also be created to offer resistance to the rotation of the bones due to movement. The The present invention is designed in accordance with preoperative planning so that the surgical procedure can be simplified.

Compared with the conventional technique, the surgical device for osteotomies 1, 2, 3 is manufactured by three-dimensional impression according to the skeletal image data of the patient, and the optimal cutting position is evaluated before the operation. The device can adapt well to the patient's bones. The surgeon can perform the first cutting position c1 or the third cutting position C3 below the guide groove 50 specified by the device. Guide groove 50 allows the surgeon to perform the osteotomy with precision. It also provides a reference for calculating the angle of cut and depth. The lateral guide edge 121, 221 provides the reference for the second cutting position C2. Not only are surgical precision and efficiency improved, but the present invention also standardizes the entire surgical procedure for surgeons.

[0038] The present invention is intended to cover various modifications and similar arrangements included within the scope of the appended claims.

Claims (4)

1. Surgical device for osteotomies (2) comprising: a first body component (22) having an upper guide edge (222) to form a cutting path, wherein said upper guide edge (222) has a first correction hole (223), a second body component (24) having a lower guide edge (241) disposed below said upper guide edge (222), wherein a guide groove (50) is formed between said upper guide edge (222) and said lower guide edge (241) for guiding a saw blade to perform a cutting procedure, wherein lower guide edge (241) has a second correction hole (242); a hinge pin guide component (28) disposed on the surface of said second body component (24), wherein said hinge pin guide component (28) comprises a third correction bore (281) extending toward the rear of said guide slot (50), where said third correction hole (281) engages a preoperative hinge shaft (30) for osteotomy as a hinge when opening a bone; wherein a corrective angle (L, N) is formed between a first hole axis (A1) of said first correction hole (223) and a second hole axis (A2) of said second correction hole (242), characterized due to the fact that said surgical device for osteotomies (1, 2, 3) is configured in such a way that, when an open angle of a space of said osteotomy is the same as that of a preoperative planning correction angle (M) , said first hole axis (A1) of said first correction hole (223) and said second hole axis (A2) of said second correction hole (242) will coincide, so that an alignment bar (20 ) between said first correction hole (223) and said second correction hole (242) only when a tibia is opened at said pre-operative planning correction angle (M) by said first body component (22) and said second body component body (2 4). The osteotomy surgical device (2) of claim 1, wherein said first body component (22) further comprises a lateral guide edge (, 221) to form a cutting path. The surgical device for osteotomies (2) of claim 1, wherein said first correction hole (223) is connected to said first body component (22) by a first rod (224); wherein said second correction bore (242) is connected to said second body component (24) by a second rod (243). The osteotomy surgical device (2) of claim 1, wherein the surfaces of said first body component (22) and said second body component (24) have a plurality of fixation grooves (26), and said device surgical procedure for osteotomies (2) is fixed on the surface of said bone by inserting a plurality of fixation pins (40) in said plurality of fixation grooves (26).