3D-printed self-resetting external fixation device

Abstract

The present application relates to the field of medical devices, in particular to a maxillofacial self-repositioning external fixation system and a construction method thereof. The present application provides a construction method of a maxillofacial self-repositioning external fixation device model, comprising: providing a three-dimensional model of a maxillofacial surface to be repaired, the three-dimensional model of the maxillofacial surface comprising a three-dimensional model of maxillofacial bones and a three-dimensional model of a maxillofacial surface; constructing a base based on the maxillofacial surface around the maxillofacial bone to be repaired; constructing a repositioning support part based on the maxillofacial surface of the healthy side corresponding to the maxillofacial bone to be repaired; and constructing a repositioning hole on the repositioning support part based on the force point of the maxillofacial bone to be repaired. The maxillofacial self-repositioning external fixation device and the maxillofacial self-repositioning external fixation system comprising the device provided by the present application not only have simple structure and are convenient to use, but also can effectively improve the maxillofacial bone repair effect during application, avoid repeated surgery, and can avoid unnecessary damage to the patient, greatly improving the treatment effect of maxillofacial injury related treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a maxillofacial self-reduction external fixation system and a construction method thereof. BACKGROUND

[0002] Maxillofacial injuries are often caused by work injuries, sports injuries, traffic accidents and accidental injuries in life. The maxillofacial blood circulation is rich, connecting the brain and neck, and the maxillofacial bone shape is irregular. Therefore, in the repair process of maxillofacial injury, there are often problems such as difficulty in one-stage reduction, and open fractures that cannot be fixed in one stage, resulting in deformity healing and affecting appearance. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a maxillofacial self-reduction external fixation device and system to solve the problems in the prior art.

[0004] To achieve the above-mentioned purposes and other related purposes, one aspect of the present application provides a construction method of a maxillofacial self-reduction external fixation device model, comprising:

[0005] providing a three-dimensional model of the maxillofacial surface to be repaired, the three-dimensional model of the maxillofacial surface comprising a three-dimensional model of the maxillofacial bone and a three-dimensional model of the maxillofacial surface;

[0006] constructing a base based on the maxillofacial surface around the maxillofacial bone repair area;

[0007] constructing a reduction support part based on the maxillofacial surface of the healthy side corresponding to the maxillofacial bone repair area;

[0008] constructing a reduction hole on the reduction support part based on the force point of the maxillofacial bone repair area.

[0009] In some embodiments of the present application, the specific method of constructing a base based on the maxillofacial surface around the maxillofacial bone repair area is: constructing a base reference surface based on the maxillofacial surface around the maxillofacial bone repair area, and constructing a base based on the base reference surface.

[0010] In some embodiments of the present application, the base extends from the forehead to below the mandible.

[0011] In some embodiments of the present application, the thickness of the base is 2mm-3mm.

[0012] In some embodiments of the present application, the specific method of constructing a reduction support surface based on the maxillofacial surface of the healthy side corresponding to the maxillofacial bone repair area is: mirroring the maxillofacial surface of the healthy side corresponding to the maxillofacial bone repair area to the maxillofacial bone repair area, constructing a reduction support part reference surface based on the mirrored skin surface of the maxillofacial surface of the healthy side, and constructing a reduction support part based on the reduction support part reference surface.

[0013] In some embodiments of the present application, the thickness of the reset support part is 2-3 mm.

[0014] In some embodiments of the present application, the specific method of constructing the reset hole on the reset support surface based on the force point of the jaw facial bone area to be repaired is as follows: constructing the reset hole based on the projection of the force point of the jaw facial bone area to be repaired on the reset support part.

[0015] In some embodiments of the present application, a plurality of reset holes are arranged on the reset support part.

[0016] In some embodiments of the present application, the diameter of the reset hole is 3-6 mm.

[0017] In some embodiments of the present application, the outer diameter of the reset hole is larger than the inner diameter.

[0018] In some embodiments of the present application, a through hole is further arranged on the reset support part, and the through hole is arranged on the reset support part.

[0019] In some embodiments of the present application, the through holes are uniformly distributed on the reset support part.

[0020] In some embodiments of the present application, the area of the through hole accounts for 3-10% of the total area of the reset support part.

[0021] Another aspect of the present application provides a preparation method of the jaw facial self-resetting external fixation device, which comprises: constructing a jaw facial self-resetting external fixation device model according to the construction method of the jaw facial self-resetting external fixation device model, and preparing the jaw facial self-resetting external fixation device.

[0022] Another aspect of the present application provides a jaw facial self-resetting external fixation system, which comprises the jaw facial self-resetting external fixation device constructed according to the construction method of the jaw facial self-resetting external fixation device model, or prepared according to the preparation method of the jaw facial self-resetting external fixation device.

[0023] In some embodiments of the present application, the reset part further comprises a reset member matched with the reset hole, and the reset member comprises a bone cortex embedding part and a traction part.

[0024] Another aspect of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to realize the steps of the construction method of the jaw facial self-resetting external fixation device model, or the steps of the preparation method of the jaw facial self-resetting external fixation device.

[0025] Another aspect of the present application provides an apparatus comprising a processor and a memory, the memory being configured to store a computer program, and the processor being configured to execute the computer program stored in the memory to cause the apparatus to perform the steps of the method for constructing a maxillofacial self-repositioning external fixation device model or the steps of the method for preparing a maxillofacial self-repositioning external fixation device model.

[0026] Another aspect of the present application provides an apparatus, which can comprise:

[0027] a three-dimensional model providing module configured to provide a three-dimensional model of a maxillofacial region to be repaired, the three-dimensional model of the maxillofacial region comprising a three-dimensional model of a maxillofacial bone and a three-dimensional model of a maxillofacial face;

[0028] a base constructing module configured to construct a base based on the maxillofacial face around a region of the maxillofacial bone to be repaired;

[0029] a repositioning support part constructing module configured to construct a repositioning support part based on the maxillofacial face of a healthy side corresponding to the region of the maxillofacial bone to be repaired;

[0030] a repositioning hole constructing module configured to construct a repositioning hole on the repositioning support part based on a force point of the region of the maxillofacial bone to be repaired;

[0031] In some embodiments of the present application, the apparatus further comprises a through hole constructing module configured to construct a through hole on the repositioning support part, the through hole being arranged through the repositioning support part;

[0032] In some embodiments of the present application, the apparatus further comprises a guide plate preparing module configured to prepare a maxillofacial self-repositioning external fixation device according to the maxillofacial self-repositioning external fixation device model constructed.

[0033] Another aspect of the present application provides a maxillofacial self-repositioning external fixation system comprising a maxillofacial self-repositioning external fixation device, the maxillofacial self-repositioning external fixation device comprising a base configured to fit the maxillofacial face around a region of a maxillofacial bone to be repaired and a repositioning support part configured to cooperate with the maxillofacial face of a healthy side corresponding to the region of the maxillofacial bone to be repaired, the base being connected to the repositioning support part, and the repositioning support part being provided with a repositioning hole;

[0034] The maxillofacial self-repositioning external fixation system further comprises a repositioning member configured to cooperate with the repositioning hole, the repositioning member comprising a bone cortex embedding part and a traction part.

[0035] In some embodiments of the present application, the base comprises a frontal part fitting portion and a mandibular fitting portion.

[0036] In some embodiments of the present application, the base has a thickness of 2mm to 3mm.

[0037] In some embodiments of the present application, the repositioning support part has a thickness of 2mm to 3mm.

[0038] In some embodiments of the present application, the reset support part is provided with a plurality of reset holes.

[0039] In some embodiments of the present application, the reset hole has a diameter of 3-6mm, and the outer diameter of the reset hole is larger than the inner diameter.

[0040] In some embodiments of the present application, the reset support part is further provided with through holes, which are uniformly distributed on the reset support part.

[0041] In some embodiments of the present application, the area of the through hole accounts for 3-10% of the total area of the reset support part.

[0042] In some embodiments of the present application, the through hole extends along the horizontal plane of the human body.

[0043] In some embodiments of the present application, the traction part is meandering. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 The figure shows the structure of the jaw self-resetting external fixation device of the present application.

[0045] Figure 2 The figure shows the structure of the reset part of the present application.

[0046] Figure 3 The figure shows the fixation of the reset part of the present application.

[0047] Figure 4 The figure shows the use of the jaw self-resetting external fixation device of the present application.

[0048] Figure 5 The figure shows the use of the jaw self-resetting external fixation system of the present application.

[0049] ELEMENT NUMBER EXPLANATION

[0050] 1 jaw self-resetting external fixation device

[0051] 11 base

[0052] 111 frontal lobe fitting part

[0053] 112 mandibular fitting part

[0054] 12 reset support part

[0055] 13 reset hole

[0056] 14 through hole

[0057] 2 reset part

[0058] 21 traction part

[0059] 22 Cortical layer embedding portion

[0060] 3 Maxillofacial bone

[0061] 31 Cortical layer

[0062] 32 Force point DETAILED DESCRIPTION

[0063] The inventor of the present application provides a new maxillofacial self-resetting external fixation device and a construction method thereof, and further provides a maxillofacial self-resetting external fixation system matched therewith, which can effectively improve the maxillofacial bone repair effect and avoid repeated operations, and on this basis, the present application is completed.

[0064] The present application provides a construction method of a maxillofacial self-resetting external fixation device model, comprising:

[0065] S1) providing a three-dimensional model of a maxillofacial bone to be repaired, the three-dimensional model of the maxillofacial bone comprising a three-dimensional model of a maxillofacial bone and a three-dimensional model of a maxillofacial face;

[0066] S2) constructing a base based on the maxillofacial face around the maxillofacial bone to be repaired;

[0067] S3) constructing a reset support portion based on the maxillofacial face of the healthy side corresponding to the maxillofacial bone to be repaired;

[0068] S4) constructing a reset hole on the reset support portion based on the force point of the maxillofacial bone to be repaired.

[0069] The construction method of the maxillofacial self-resetting external fixation device model provided by the present application can comprise: providing a three-dimensional model of a maxillofacial bone to be repaired, the three-dimensional model of the maxillofacial bone comprising a three-dimensional model of a maxillofacial bone and a three-dimensional model of a maxillofacial face. The maxillofacial bone to be repaired generally refers to the maxillofacial part of the patient who needs to receive maxillofacial bone repair, and the three-dimensional model provided generally needs to include a three-dimensional model of a maxillofacial bone and a three-dimensional model of a maxillofacial face. The three-dimensional model of the maxillofacial bone generally refers to a three-dimensional model of the maxillofacial bone, which at least needs to include the maxillofacial bone region to be repaired, which can generally be obtained by importing CT data into software, and the specific software can be, for example, Simplant, Mimics, Proplan, etc. The three-dimensional model of the maxillofacial face generally refers to a three-dimensional model of the maxillofacial surface of the patient, which can generally be obtained by importing CT data into software, and the specific software can be, for example, mimics, medraw, etc. After the three-dimensional model of the maxillofacial bone and the three-dimensional model of the maxillofacial face are integrated, the three-dimensional model of the maxillofacial bone to be repaired can be obtained, and the software used in the integration process can be, for example, 3-matic, geomagic, etc.

[0070] The method for constructing the maxillofacial self-resetting external fixation device model can further include: constructing a base on the maxillofacial surface around the maxillofacial bone region to be repaired. The base can generally be used to support the reset support part, and the base is generally distributed on the maxillofacial surface around the maxillofacial bone region to be repaired, and is attached to the maxillofacial surface of the region and extends along the maxillofacial surface, and the region is generally normal tissue. The base can generally extend on the maxillofacial surface and cover a certain area, so as to better attach to the maxillofacial surface as a whole, so as to provide better support effect for the reset support part. For example, the base can extend from the forehead to below the lower jaw. The thickness of the base can be adjusted by those skilled in the art, so as to provide appropriate support strength. For example, the thickness of the base can be 2mm to 3mm. In a preferred embodiment of the present application, the specific method for constructing the base on the maxillofacial surface around the maxillofacial bone region to be repaired is: constructing a base reference surface on the maxillofacial surface around the maxillofacial bone region to be repaired, and constructing the base on the base reference surface. The base reference surface is generally matched with the surface of the maxillofacial surface around the maxillofacial bone region to be repaired, and the base reference surface can generally extend from the forehead to below the lower jaw, so as to better attach to the maxillofacial surface as a whole, so as to provide better support effect. The base can be obtained by extending the base reference surface outward (that is, in the direction opposite to the direction of facing the surface of the maxillofacial bone) by a certain distance. The distance of the outward extension of the base reference surface is generally corresponding to the thickness of the base. For example, the distance of the outward extension can be 2mm to 3mm.

[0071] The construction method of the maxillofacial self-resetting external fixation device model can further include: constructing a reset support part based on the maxillofacial face of the healthy side corresponding to the maxillofacial bone region to be repaired. The maxillofacial face of the healthy side generally refers to the maxillofacial bone and maxillofacial face structure of the side (i.e., the healthy tissue side) of the patient that does not have maxillofacial bone injury. The reset position of the expected maxillofacial face can be obtained based on the healthy side. Since the human face structure is basically left-right symmetrical, and the reset position of the maxillofacial face is often corresponding to the position of the maxillofacial skeleton of the part, a reasonable reset position of the maxillofacial face can correspond to a reasonable reset position of the maxillofacial skeleton. The reset support part is generally used to provide a support force to the part (e.g., a reset piece, more specifically, a reset pin, etc.) that pulls the maxillofacial skeleton to reset during the maxillofacial skeleton resetting process. The reset support part can generally be distributed on the maxillofacial face of the maxillofacial bone region to be repaired and extend along the maxillofacial face. When the reset support part is constructed, since the region is the maxillofacial bone region to be repaired, the reset support part generally has a certain gap with the maxillofacial face of the region. In addition, since the maxillofacial face of the healthy tissue side generally arches outward, when the support force is provided, generally better stability can be obtained. The thickness of the reset support part can be adjusted by those skilled in the art, so as to be able to provide a suitable support strength. For example, the thickness of the reset support part can be 2 mm to 3 mm. In a preferred embodiment of the present application, the specific method of constructing the reset support part based on the maxillofacial face of the healthy side corresponding to the maxillofacial bone region to be repaired is: mirroring the maxillofacial face of the healthy side corresponding to the maxillofacial bone region to be repaired to the maxillofacial bone region to be repaired, constructing a reset support part reference surface based on the mirrored skin surface of the maxillofacial face of the healthy side, and constructing the reset support part based on the reset support part reference surface. Mirroring the maxillofacial face of the healthy side to the maxillofacial bone region to be repaired can obtain the reset position of the expected maxillofacial face and maxillofacial skeleton. The support part reference surface is generally in accordance with the mirrored surface of the maxillofacial face of the healthy side. The support part reference surface can generally cover the entire maxillofacial bone region to be repaired, so as to provide better traction effect to each repair part. The reset support part reference surface extends outward (i.e., in the direction opposite to the direction of facing the maxillofacial bone surface) by a certain distance, so as to construct the reset support part. The distance of the outward extension of the reset support part reference surface is generally corresponding to the thickness of the reset support part. For example, the distance of the outward extension can be 2 mm to 3 mm.

[0072] The construction method of the maxillofacial self-repositioning external fixation device model can further include: constructing a repositioning hole on the repositioning support part based on the force point of the maxillofacial bone to be repaired. In the construction of the repositioning hole, the force point of the maxillofacial bone to be repaired is usually provided, and the determination of the force point of the maxillofacial bone to be repaired is usually based on the shape, position and the like of the fracture block. The repositioning hole is usually used to arrange a component (for example, a repositioning piece, and more specifically, a repositioning pin or the like) for traction of the repositioning of the maxillofacial bone. Generally, a plurality of repositioning holes are arranged on the repositioning support part, and the repositioning holes are usually arranged on the repositioning support part, so that a more uniform and accurate traction effect can be provided for the maxillofacial bone to be repaired. The shape of the repositioning hole can be adjusted by those skilled in the art as needed. Generally, the shape of the repositioning hole corresponds to the repositioning piece. For example, the repositioning hole can be cylindrical, and the diameter of the repositioning hole can be 3-6 mm. For another example, the outer diameter of the repositioning hole can be greater than the inner diameter, so as to cooperate with the repositioning piece and better provide traction. In a preferred embodiment of the present application, the specific method for constructing the repositioning hole on the repositioning support part based on the force point of the maxillofacial bone to be repaired is to construct the repositioning hole based on the projection of the force point of the maxillofacial bone to be repaired on the repositioning support part. After the force point of the maxillofacial bone to be repaired is determined, the force point is projected to the repositioning support part, and the repositioning hole can be constructed according to the projection direction and the shape of the repositioning support part. The projection direction usually corresponds to the inner side of the repositioning support part, that is, perpendicular to the tangent plane of the inner side.

[0073] The construction method of the maxillofacial self-repositioning external fixation device model can further include: constructing a repositioning hole on the repositioning support part based on the force point of the maxillofacial bone to be repaired. In the construction of the repositioning hole, the force point of the maxillofacial bone to be repaired is usually provided, and the determination of the force point of the maxillofacial bone to be repaired is usually based on the shape, position and the like of the fracture block. The repositioning hole is usually used to arrange a component (for example, a repositioning piece, and more specifically, a repositioning pin or the like) for traction of the repositioning of the maxillofacial bone. Generally, a plurality of repositioning holes are arranged on the repositioning support part, and the repositioning holes are usually arranged on the repositioning support part, so that a more uniform and accurate traction effect can be provided for the maxillofacial bone to be repaired. The shape of the repositioning hole can be adjusted by those skilled in the art as needed. Generally, the shape of the repositioning hole corresponds to the repositioning piece. For example, the repositioning hole can be cylindrical, and the diameter of the repositioning hole can be 3-6 mm. For another example, the outer diameter of the repositioning hole can be greater than the inner diameter, so as to cooperate with the repositioning piece and better provide traction. In a preferred embodiment of the present application, the specific method for constructing the repositioning hole on the repositioning support part based on the force point of the maxillofacial bone to be repaired is to construct the repositioning hole based on the projection of the force point of the maxillofacial bone to be repaired on the repositioning support part. After the force point of the maxillofacial bone to be repaired is determined, the force point is projected to the repositioning support part, and the repositioning hole can be constructed according to the projection direction and the shape of the repositioning support part. The projection direction usually corresponds to the inner side of the repositioning support part, that is, perpendicular to the tangent plane of the inner side.

[0074] The second aspect of the present application provides a preparation method of a maxillofacial self-repositioning external fixation device, which comprises: constructing a maxillofacial self-repositioning external fixation device model according to the construction method of the maxillofacial self-repositioning external fixation device model provided by the first aspect of the present application, and preparing a maxillofacial self-repositioning external fixation device. The method for preparing a maxillofacial self-repositioning external fixation device according to the model should be known to those skilled in the art, for example, 3D printing or the like can be used, and for another example, the material used in the 3D printing process can be photosensitive resin or the like.

[0075] The third aspect of the present application provides a maxillofacial self-repositioning external fixation device, which is obtained by the construction method of the maxillofacial self-repositioning external fixation device model provided in the first aspect of the present application or prepared by the preparation method of the maxillofacial self-repositioning external fixation device provided in the second aspect of the present application.

[0076] As shown in Figure 1 The present application provides a maxillofacial self-repositioning external fixation device 1, which comprises a base 11 for fitting the maxillofacial surface around the maxillofacial bone to be repaired and a repositioning support part 12 matched with the healthy side of the maxillofacial surface corresponding to the maxillofacial bone to be repaired. The base 11 is connected with the repositioning support part 12, and the repositioning support part 12 is provided with a repositioning hole 13. The maxillofacial self-repositioning external fixation device 1 can be used for maxillofacial bone repair. It can be fitted to the maxillofacial surface (i.e. normal tissue) around the maxillofacial bone to be repaired through the base 11, while the repositioning support part 12 is usually constructed according to the healthy side of the maxillofacial surface corresponding to the maxillofacial bone to be repaired. The repositioning support part 12 is usually located above the maxillofacial bone to be repaired and has a certain gap with it, and provides support force to the component (e.g. repositioning piece, more specifically repositioning pin, etc.) for pulling the maxillofacial bone to reposition, so as to pull the damaged maxillofacial bone and promote its repair.

[0077] In the maxillofacial self-repositioning external fixation device provided by the present application, the base 11 can usually be used to support the repositioning support part. The base 11 is usually distributed on the maxillofacial surface around the maxillofacial bone to be repaired, and is fitted to the maxillofacial surface in this area and extends along the maxillofacial surface. This part of the area is usually normal tissue. The base 11 can usually extend on the maxillofacial surface and cover a certain area, so as to better fit the maxillofacial surface as a whole, so as to provide better support effect to the repositioning support part. For example, the base 11 can include a frontal lobe fitting part 111 and a lower jaw fitting part 112, so as to extend from the frontal lobe to below the lower jaw. For another example, the thickness of the base 11 can be 2mm-3mm.

[0078] In the maxillofacial self-repositioning external fixation device provided by the present application, the repositioning support part 12 is usually used to provide support force to the component (e.g. repositioning piece, more specifically repositioning pin, etc.) for pulling the maxillofacial bone to reposition during the maxillofacial bone repositioning process. The shape of the repositioning support part 12 usually corresponds to the shape of the maxillofacial surface on the healthy tissue side of the patient. Since the maxillofacial surface on the healthy tissue side usually arches outward, there is usually better stability when providing support force. The repositioning support part 12 usually needs to have a certain thickness to provide good support effect. For example, the thickness of the repositioning support part 12 can be 2mm-3mm.

[0079] The jaw and face self-resetting external fixation device provided by the present application is characterized in that a plurality of reset holes 13 are arranged on the reset support part 12, and the reset holes are arranged on the reset support part so as to provide more uniform and accurate traction effect on the jaw and face bone to be repaired. The shape of the reset holes can be adjusted by those skilled in the art as required, and generally, the shape of the reset holes corresponds to the reset part, for example, the reset holes can be cylindrical, and the diameter of the reset holes can be 3-6 mm, and for another example, the outer diameter of the reset holes 13 can be larger than the inner diameter so as to cooperate with the reset part and better provide traction.

[0080] The jaw and face self-resetting external fixation device provided by the present application is characterized in that a plurality of reset holes 13 are arranged on the reset support part 12, and the reset holes are arranged on the reset support part so as to provide more uniform and accurate traction effect on the jaw and face bone to be repaired. The shape of the reset holes can be adjusted by those skilled in the art as required, and generally, the shape of the reset holes corresponds to the reset part, for example, the reset holes can be cylindrical, and the diameter of the reset holes can be 3-6 mm, and for another example, the outer diameter of the reset holes 13 can be larger than the inner diameter so as to cooperate with the reset part and better provide traction.

[0081] The fourth aspect of the present application provides a jaw and face self-resetting external fixation system, which comprises the jaw and face self-resetting external fixation device 1 provided by the third aspect of the present application, and further comprises a reset part 2 cooperating with the reset hole 13, wherein the reset part 2 comprises a bone cortex embedding part 22 and a traction part 21. The reset part 2 generally cooperates with the reset hole 13, the bone cortex embedding part 22 of the reset part 2 can generally be embedded into the bone cortex of the jaw and face bone to be repaired, and the traction part 21 can cooperate with the reset support part 12, so as to form a certain traction on the jaw and face bone to be repaired through the force between the reset support part 12, for example, the traction part 21 can pass through the reset hole 13 and be exposed to the reset support part 12 of the jaw and face self-resetting external fixation device 1, the outer diameter of the reset hole 13 can be larger than the inner diameter, and the part of the traction part 21 located outside the reset support part 12 can be embedded into the outside of the reset hole 13 but not pass through the reset hole 13, so as to provide traction on the jaw and face bone to be repaired through the traction part 21 outside the reset support part 12. The shape and size of the bone cortex embedding part 22 and the traction part 21 can be reasonably adjusted by those skilled in the art, for example, the traction part 21 can be meandering, and for another example, a hole is generally arranged on the jaw and face bone to be repaired, the bone cortex embedding part 22 can be inserted into the hole, and the end part thereof can extend to both sides so as to realize the relative fixation between the reset part 2 and the jaw and face bone to be repaired. In a specific embodiment of the present application, the reset part 2 as a whole forms an Ω shape.

[0082] The jaw and face self-resetting external fixation system can further comprise a covering film for covering the jaw and face self-resetting external fixation device 1. The covering film is generally flexible. When the jaw and face self-resetting external fixation device 1 is attached to the jaw and face bone to be repaired, the covering film can be attached to the surface of the jaw and face self-resetting external fixation device 1, and the covering area of the covering film is generally slightly larger than the covering area of the jaw and face self-resetting external fixation device 1. After covering, the negative pressure suction is performed, and the jaw and face self-resetting external fixation device 1 is stably attached to the target area through the covering film.

[0083] The fifth aspect of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the steps of the construction method of the jaw and face self-resetting external fixation device model provided by the first aspect of the present application or the steps of the preparation method of the jaw and face self-resetting external fixation device provided by the second aspect of the present application.

[0084] The sixth aspect of the present application provides a device, which comprises a processor and a memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to make the device execute the steps of the construction method of the jaw and face self-resetting external fixation device model provided by the first aspect of the present application or the steps of the preparation method of the jaw and face self-resetting external fixation device provided by the second aspect of the present application.

[0085] The seventh aspect of the present application provides a device, which can comprise:

[0086] A three-dimensional model providing module is configured to provide a three-dimensional model of a jaw and face to be repaired, wherein the three-dimensional model of the jaw and face comprises a three-dimensional model of a jaw and face bone and a three-dimensional model of a jaw and face surface;

[0087] A base construction module is configured to construct a base based on a jaw and face surface around a jaw and face bone to be repaired;

[0088] A reset support part construction module is configured to construct a reset support part based on a jaw and face surface of a healthy side corresponding to a jaw and face bone to be repaired;

[0089] A reset hole construction module is configured to construct a reset hole on the reset support part based on a force point of a jaw and face bone to be repaired;

[0090] Optionally, the device further comprises a through hole construction module configured to construct a through hole on the reset support part, wherein the through hole is arranged on the reset support part;

[0091] Optionally, the device further comprises a guide plate preparation module configured to prepare a jaw and face self-resetting external fixation device based on the jaw and face self-resetting external fixation device model.

[0092] In the present application, the operation principle of each module in the above device can refer to the construction method of the maxillofacial self-resetting external fixation device model and / or the preparation method of the maxillofacial self-resetting external fixation device as described above, which will not be repeated here.

[0093] The maxillofacial self-resetting external fixation device and the maxillofacial self-resetting external fixation system comprising the device provided by the present application not only have simple structure and are convenient to use, but also can effectively improve the maxillofacial bone repair effect during application, avoid repeated surgery, avoid unnecessary damage to patients, greatly improve the treatment effect of maxillofacial injury related treatment, and have good industrialization prospect.

[0094] The embodiments of the present application are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0095] Example 1

[0096] Construction of the maxillofacial self-resetting external fixation device:

[0097] 1) Obtain the CT imaging data of the patient's skull, and read the data using three-dimensional reconstruction software.

[0098] 2) Three-dimensionally reconstruct the craniofacial fracture model and the facial skin model, and distinguish and label the fracture blocks with different colors.

[0099] 3) Simulate the process of resetting the fracture blocks in the software, and determine the force point of resetting the fracture blocks.

[0100] 4) Mirror the facial data of the healthy side of the patient to the affected side wound, and the mirrored facial data is the fracture reset surface.

[0101] 5) Take the healthy tissue around the wound as the base reference surface of the fixation device, and take the projection point of the force point on the reset surface as the reset point.

[0102] 6) Design the self-resetting external fixation device according to the fracture reset surface, the base reference surface, and the reset point, the reset hole diameter is 5mm, and the thickness of the reset support part and the base is 2mm.

[0103] 7) Export the puncture guide plate stl format file, and 3D print the external fixation device.

[0104] The 3D printing equipment is a light curing rapid prototyping equipment, and the printing material is photosensitive resin.

[0105] In the operation, the external fixation device is used in combination with the negative pressure wound treatment technology:

[0106] The external fixation device obtained by the above preparation is placed at the corresponding position of the wound site of the patient, and the corresponding positions of the reset holes are marked on the skin;

[0107] The skin marked with the corresponding positions of the reset holes is incised, and the bone pieces are punched using a skull drill;

[0108] After covering the wound surface with a sponge, a conformable support is worn;

[0109] The self-resetting nails are wedged into the reset holes, and the front ends of the self-resetting nails are embedded into the bone pieces;

[0110] The 3M film is attached, negative pressure suction is connected, the operation is completed, and regular dressing change and imaging examination are performed, and the traction force is adjusted in a timely manner.

[0111] The above external fixation device can functionally reset the fractured pieces while repairing the wound surface, thereby reducing the frequency of bone setting and orthopedic correction in the later stage.

[0112] In summary, the present application effectively overcomes the various shortcomings in the prior art and has a high industrial utilization value.

[0113] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A method for constructing a maxillofacial self-repositioning external fixation device model, comprising: providing a three-dimensional model of a maxillofacial region to be repaired, the three-dimensional model of the maxillofacial region comprising a three-dimensional model of a maxillofacial bone and a three-dimensional model of a maxillofacial face; constructing a base on the maxillofacial face around a maxillofacial bone region to be repaired; constructing a repositioning support on the maxillofacial face corresponding to a healthy side of the maxillofacial bone region to be repaired, wherein the repositioning support leaves a gap with the maxillofacial face of the maxillofacial bone region to be repaired; constructing a repositioning hole on the repositioning support based on a force point of the maxillofacial bone region to be repaired, wherein an outer diameter of the repositioning hole is larger than an inner diameter of the repositioning hole, and the repositioning hole is used to set a component for repositioning the maxillofacial bone; the repositioning support provides a support force to the component for repositioning the maxillofacial bone through the repositioning hole, so as to reposition the damaged maxillofacial bone.

2. The construction method of claim 1, wherein, The specific method for constructing the base on the maxillofacial face around the maxillofacial bone region to be repaired comprises: constructing a base reference surface on the maxillofacial face around the maxillofacial bone region to be repaired, and constructing the base based on the base reference surface. The base extends from a frontal region to below a mandible. The thickness of the base is 2mm-3mm.

3. The construction method of claim 1, wherein, The specific method for constructing the repositioning support on the maxillofacial face corresponding to the healthy side of the maxillofacial bone region to be repaired comprises: mirroring the maxillofacial face corresponding to the healthy side of the maxillofacial bone region to be repaired to the maxillofacial bone region to be repaired, constructing a repositioning support reference surface based on a skin surface of the mirror image of the maxillofacial face corresponding to the healthy side, and constructing the repositioning support based on the repositioning support reference surface. The thickness of the repositioning support is 2mm-3mm.

4. The construction method of claim 1, wherein, The specific method for constructing the repositioning hole on the repositioning support based on the force point of the maxillofacial bone region to be repaired comprises: constructing the repositioning hole based on a projection of the force point of the maxillofacial bone region to be repaired on the repositioning support. A plurality of repositioning holes are arranged on the repositioning support. The diameter of the repositioning hole is 3-6mm.

5. The construction method of claim 1, wherein, The method further comprises: constructing a through hole on the repositioning support, wherein the through hole is arranged on the repositioning support. The area of the through hole accounts for 3%-10% of the total area of the repositioning support.

6. The construction method of claim 5, wherein, The through holes are uniformly distributed on the repositioning support.

7. A method of making a maxillofacial self-reducing external fixation device, the method comprising: A maxillofacial self-repositioning external fixation device is prepared according to the maxillofacial self-repositioning external fixation device model constructed by the method of any one of claims 1-6. 8.A maxillofacial self-repositioning external fixation system, comprising a maxillofacial self-repositioning external fixation device obtained by the method of any one of claims 1-6, or prepared by the method of claim 7.

9. The maxillofacial self-reducing external fixation system of claim 8, wherein, The maxillofacial self-repositioning external fixation system further comprises a repositioning member matched with the repositioning hole, wherein the repositioning member comprises a bone cortex embedding part and a traction part.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the steps of the method of any one of claims 1-6, or the steps of the method of claim 7.

11. A computer device comprising: A processor and a memory, the memory is used to store a computer program, the processor is used to execute the computer program stored in the memory, so that the device executes the steps of the jaw and face self-repositioning external fixation device model construction method as claimed in any one of claims 1-6, or the steps of the jaw and face self-repositioning external fixation device model preparation method as claimed in claim 7.

12. A preparation device of a jaw and face self-repositioning external fixation device, the preparation device comprising: a three-dimensional model providing module, configured to provide a three-dimensional model of a jaw and face to be repaired, the three-dimensional model of the jaw and face comprising a three-dimensional model of a jaw and face bone and a three-dimensional model of a jaw and face surface; a base construction module, configured to construct a base based on the jaw and face surface around a jaw and face bone to be repaired region; a repositioning support part construction module, configured to construct a repositioning support part based on the jaw and face surface of the healthy side corresponding to the jaw and face bone to be repaired region; so that the repositioning support part leaves a gap with the jaw and face surface of the jaw and face bone to be repaired region; a repositioning hole construction module, configured to construct a repositioning hole on the repositioning support part based on the force point of the jaw and face bone to be repaired region; the repositioning hole has an outer diameter larger than an inner diameter; the repositioning hole is used to set a component for repositioning the jaw and face bone; the repositioning support part provides support force to the component for repositioning the jaw and face bone through the repositioning hole set thereon, so as to reposition the damaged jaw and face bone.

13. The preparation device of claim 12, wherein, The preparation device further comprises a through hole construction module, configured to construct a through hole on the repositioning support part, the through hole is arranged on the repositioning support part.

14. The preparation device of claim 12, wherein, The preparation device further comprises a guide plate preparation module, configured to prepare a jaw and face self-repositioning external fixation device according to the jaw and face self-repositioning external fixation device model obtained by construction.

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