阅读说明：本技术 一种3d打印自复位外固定装置 (3D prints from external fixing device that restores to throne ) 是由 葛奎 吴嘉骏 葛卫兵 徐兵 于 2019-11-29 设计创作，主要内容包括：本发明涉及医疗器械领域,特别是涉及一种颌面自复位外固定系统及其构建方法。本发明中提供了一种颌面自复位外固定装置模型的构建方法,包括：提供待修复的颌面的三维模型,颌面的三维模型包括颌面骨三维模型和颌面面部三维模型；基于颌面骨待修复区域周围的颌面面部构建基座；基于颌面骨待修复区域所对应的健侧面的颌面面部构建复位支撑部；基于颌面骨待修复区域的着力点在复位支撑部上构建复位孔。本发明所提供的颌面自复位外固定装置及包括该装置的颌面自复位外固定系统不仅结构简单,使用方便,其应用过程中还可以有效改善颌面骨骼修复效果,避免多次重复手术,可以避免对患者造成的不必要损伤,极大地提升了颌面部损伤相关治疗的治疗效果。(The invention relates to the field of medical instruments, in particular to a maxillofacial self-resetting external fixing system and a construction method thereof. The invention provides a method for constructing a model of a maxillofacial self-resetting external fixing device, which comprises the following steps: providing a three-dimensional model of a maxillofacial surface to be repaired, wherein the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model; constructing a base based on a maxillofacial face around a to-be-repaired area of the maxillofacial bone; constructing a reduction supporting part based on a maxillofacial face of a healthy side corresponding to a maxillofacial bone region to be repaired; and constructing a reset hole on the reset supporting part based on the acting point of the maxillofacial bone to-be-repaired area. The maxillofacial self-resetting external fixing device and the maxillofacial self-resetting external fixing system comprising the same are simple in structure and convenient to use, and can effectively improve the maxillofacial skeleton repairing effect in the application process, avoid repeated operations, avoid unnecessary injuries to a patient and greatly improve the treatment effect of maxillofacial injury related treatment.)

1. A method for constructing a model of a maxillofacial self-resetting external fixing device comprises the following steps:

providing a three-dimensional model of a maxillofacial surface to be repaired, wherein the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model;

constructing a base based on a maxillofacial face around a to-be-repaired area of the maxillofacial bone;

constructing a reduction supporting part based on a maxillofacial face of a healthy side corresponding to a maxillofacial bone region to be repaired;

and constructing a reset hole on the reset supporting part based on the acting point of the maxillofacial bone to-be-repaired area.

2. The construction method according to claim 1, wherein the specific method of constructing the base based on the maxillofacial region around the region to be repaired of the maxillofacial bone is: constructing a base reference surface based on the maxillofacial surface around the area to be repaired of the maxillofacial bone, and constructing a base based on the base reference surface;

and/or, the base extends from the forehead to below the mandible;

and/or the thickness of the base is 2 mm-3 mm.

3. The construction method as claimed in claim 1, wherein the specific method for constructing the reduction support surface based on the maxillofacial surface of the healthy side corresponding to the area to be repaired of the maxillofacial bone is as follows: mirroring a maxillofacial surface of a key side surface corresponding to a maxillofacial bone area to be repaired to the maxillofacial bone area to be repaired, constructing a reset support part reference surface based on a skin surface of the mirror image of the maxillofacial surface of the key side surface, and constructing a reset support part based on the reset support part reference surface;

and/or the thickness of the reset supporting part is 2 mm-3 mm.

4. The construction method according to claim 1, wherein the specific method for constructing the reduction hole on the reduction support surface based on the force application point of the maxillofacial bone region to be repaired is as follows: constructing a reset hole based on the projection of the acting point of the maxillofacial bone to-be-repaired area on the reset supporting part;

and/or a plurality of reset holes are arranged on the reset supporting part in a penetrating way;

and/or the diameter of the reset hole is 3-6 mm;

and/or the outside aperture of the reset hole is larger than the inside aperture.

5. The method of constructing as claimed in claim 1, further comprising: constructing a through hole on the reset supporting part, wherein the through hole is arranged in the reset supporting part in a penetrating way;

preferably, the through holes are uniformly distributed on the reset supporting part;

and/or the area of the through hole accounts for 3% -10% of the total area of the reset supporting part.

6. A method of making a maxillofacial self-repositioning external fixation device, the method comprising: the maxillofacial self-resetting external fixing device model obtained by the construction method of the maxillofacial self-resetting external fixing device model according to any one of claims 1 to 5 is prepared.

7. A maxillofacial self-resetting external fixation system, comprising a maxillofacial self-resetting external fixation device constructed by the method for constructing a maxillofacial self-resetting external fixation device model according to any one of claims 1 to 5 or prepared by the method for preparing a maxillofacial self-resetting external fixation device according to claim 6;

optionally, the reduction device further comprises a reduction member matched with the reduction hole, and the reduction member comprises a cortical bone embedding part and a traction part.

8. A computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method of constructing a model of a maxillofacial self-resetting external fixation device according to any one of claims 1 to 5, or the steps of the method of manufacturing a maxillofacial self-resetting external fixation device according to claim 6.

9. An apparatus, comprising: a processor and a memory, the memory for storing a computer program, the processor for executing the computer program stored by the memory to cause the apparatus to perform the steps of the method of constructing a model of a maxillofacial self-resetting external fixation device of any one of claims 1 to 5 or the steps of the method of preparing a model of a maxillofacial self-resetting external fixation device of claim 6.

10. An apparatus, the apparatus may comprise:

the three-dimensional model providing module is used for providing a three-dimensional model of a maxillofacial surface to be repaired, and the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model;

the base construction module is used for constructing a base based on the maxillofacial surface around the area to be repaired of the maxillofacial bone;

the restoration support part constructing module is used for constructing a restoration support part based on a maxillofacial face of a healthy side corresponding to a maxillofacial bone region to be repaired;

the restoring hole constructing module is used for constructing a restoring hole on the restoring supporting part based on the acting point of the maxillofacial bone area to be restored;

optionally, the method further includes: the through hole constructing module is used for constructing a through hole on the reset supporting part, and the through hole penetrates through the reset supporting part;

optionally, the method further includes: and the guide plate preparation module is used for preparing the maxillofacial self-resetting external fixing device according to the constructed maxillofacial self-resetting external fixing device model.

Technical Field

The invention relates to the field of medical instruments, in particular to a maxillofacial self-resetting external fixing system and a construction method thereof.

Background

The maxillofacial injury is mostly caused by industrial injury, sports injury, traffic accidents and accidental injury in life, the maxillofacial blood circulation is rich, the cranium is connected to the upper part of the maxillofacial injury, the neck is connected to the lower part of the maxillofacial injury, and the shape of the maxillofacial skeleton is irregular, so that the problems of difficult first-stage restoration, incapability of first-stage fixation of open fracture and the like often exist in the restoration process of the maxillofacial injury, deformed healing is caused, and the appearance is influenced.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a maxillofacial self-repositioning external fixation device and system, which solves the problems of the prior art.

In order to achieve the above and other related objects, the present invention provides, in one aspect, a method for constructing a model of a maxillofacial self-repositioning external fixation device, including:

providing a three-dimensional model of a maxillofacial surface to be repaired, wherein the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model;

constructing a base based on a maxillofacial face around a to-be-repaired area of the maxillofacial bone;

constructing a reduction supporting part based on a maxillofacial face of a healthy side corresponding to a maxillofacial bone region to be repaired;

and constructing a reset hole on the reset supporting part based on the acting point of the maxillofacial bone to-be-repaired area.

In some embodiments of the present invention, a specific method for constructing a base based on a maxillofacial region around a region of a maxillofacial bone to be repaired is: and constructing a base reference surface based on the maxillofacial face around the area to be repaired of the maxillofacial bone, and constructing a base based on the base reference surface.

In some embodiments of the invention, the base extends from the forehead to below the mandible.

In some embodiments of the invention, the base has a thickness of 2mm to 3 mm.

In some embodiments of the present invention, a specific method for constructing a reduction support surface based on a maxillofacial surface of a healthy side corresponding to a region of a maxillofacial bone to be repaired is as follows: the mirror image maxillofacial bone treats the maxillofacial face to the maxillofacial bone of strong side face that the restoration region is waited to correspond, constructs the support portion reference surface that resets based on the skin surface of the mirror image of the maxillofacial face of strong side face, constructs the support portion that resets based on the support portion reference surface that resets.

In some embodiments of the present invention, the thickness of the reduction support is 2mm to 3 mm.

In some embodiments of the present invention, a specific method for constructing a reduction hole on a reduction support surface based on an action point of a maxillofacial bone region to be repaired is as follows: and constructing a reset hole based on the projection of the acting point of the maxillofacial bone to-be-repaired area on the reset supporting part.

In some embodiments of the present invention, the reset supporting portion is provided with a plurality of reset holes.

In some embodiments of the present invention, the diameter of the reset hole is 3-6 mm.

In some embodiments of the present invention, the reset bore has an outer diameter greater than an inner diameter.

In some embodiments of the invention, further comprising: and constructing a through hole on the reset supporting part, wherein the through hole is arranged in the reset supporting part in a penetrating way.

In some embodiments of the invention, the through holes are evenly distributed on the reduction support.

In some embodiments of the present invention, the area of the through hole accounts for 3% to 10% of the total area of the reset support portion.

In another aspect, the present invention provides a method for preparing a maxillofacial self-resetting external fixation device, comprising: and constructing the obtained model of the maxillofacial self-resetting external fixing device according to the construction method of the model of the maxillofacial self-resetting external fixing device, and preparing the maxillofacial self-resetting external fixing device.

The invention also provides a maxillofacial self-resetting external fixing system, which comprises the maxillofacial self-resetting external fixing device constructed by the construction method of the maxillofacial self-resetting external fixing device model or prepared by the preparation method of the maxillofacial self-resetting external fixing device.

In some embodiments of the present invention, the reduction member further comprises a reduction element coupled to the reduction hole, the reduction element comprising a cortical bone insertion portion and a distraction portion.

Another aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, implements the steps of the method for constructing a model of a maxillofacial self-resetting external fixation device or the steps of the method for preparing a maxillofacial self-resetting external fixation device.

In another aspect, the invention provides an apparatus comprising: a processor and a memory, the memory for storing a computer program, the processor for executing the computer program stored by the memory to cause the apparatus to perform the steps of the method for constructing the model of the maxillofacial self-resetting external fixation device or the steps of the method for preparing the model of the maxillofacial self-resetting external fixation device.

Another aspect of the present invention provides an apparatus, which may include:

the three-dimensional model providing module is used for providing a three-dimensional model of a maxillofacial surface to be repaired, and the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model;

the base construction module is used for constructing a base based on the maxillofacial surface around the area to be repaired of the maxillofacial bone;

the restoration support part constructing module is used for constructing a restoration support part based on a maxillofacial face of a healthy side corresponding to a maxillofacial bone region to be repaired;

the restoring hole constructing module is used for constructing a restoring hole on the restoring supporting part based on the acting point of the maxillofacial bone area to be restored;

in some embodiments of the invention, further comprising: the through hole constructing module is used for constructing a through hole on the reset supporting part, and the through hole penetrates through the reset supporting part;

in some embodiments of the invention, further comprising: and the guide plate preparation module is used for preparing the maxillofacial self-resetting external fixing device according to the constructed maxillofacial self-resetting external fixing device model.

The invention provides a maxillofacial self-resetting external fixing system, which comprises a maxillofacial self-resetting external fixing device, wherein the maxillofacial self-resetting external fixing device comprises a base and a resetting support part, the base is used for being attached to the maxillofacial surface around a maxillofacial bone to-be-repaired area, the resetting support part is matched with the maxillofacial surface of a healthy side corresponding to the maxillofacial bone to-be-repaired area, the base is connected with the resetting support part, and the resetting support part is provided with a resetting hole;

the maxillofacial self-resetting external fixing system further comprises a resetting piece matched with the resetting hole, and the resetting piece comprises a cortical bone embedding part and a traction part.

In some embodiments of the invention, the base includes a forehead fit and a chin fit.

In some embodiments of the invention, the base has a thickness of 2mm to 3 mm.

In some embodiments of the present invention, the thickness of the reduction support is 2mm to 3 mm.

In some embodiments of the present invention, the reset supporting portion is provided with a plurality of reset holes.

In some embodiments of the present invention, the diameter of the reset hole is 3-6 mm, and the outside aperture of the reset hole is larger than the inside aperture.

In some embodiments of the present invention, the reset supporting portion is further provided with through holes, and the through holes are uniformly distributed on the reset supporting portion.

In some embodiments of the present invention, the area of the through hole accounts for 3% to 10% of the total area of the reset support portion.

In some embodiments of the invention, the through-hole extends along a horizontal plane of the human body.

In some embodiments of the invention, the traction portion is serpentine.

Drawings

Fig. 1 is a schematic structural view of the jaw-face self-resetting external fixing device of the invention.

Fig. 2 is a schematic structural diagram of the reset element of the present invention.

Fig. 3 is a schematic view showing the fixation of the restoring member according to the present invention.

Fig. 4 is a schematic view showing the use of the maxillofacial self-resetting external fixation device of the present invention.

Fig. 5 is a schematic view showing the use of the maxillofacial self-resetting external fixation system of the present invention.

Description of the element reference numerals

1 jaw face self-resetting external fixing device

11 base

111 forehead region attaching part

112 mandible fitting part

12 reset support part

13 reset hole

14 through hole

2 reset piece

21 traction part

22 cortical bone insert

3 maxillofacial skeleton

31 cortex of bone

32 force application points

Detailed Description

The inventor of the invention provides a novel maxillofacial self-resetting external fixing device and a construction method thereof through a large amount of exploratory researches, and further provides a maxillofacial self-resetting external fixing system matched with the maxillofacial self-resetting external fixing device and the maxillofacial self-resetting external fixing system, and the maxillofacial self-resetting external fixing device and the maxillofacial self-resetting external fixing system can effectively improve the maxillofacial skeleton repairing effect and avoid repeated operations, thereby completing the invention.

The invention provides a method for constructing a model of a jaw-face self-resetting external fixing device, which comprises the following steps:

s1) providing a three-dimensional model of a maxillofacial surface to be repaired, wherein the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model;

s2) constructing a base based on the maxillofacial surface around the area to be repaired of the maxillofacial bone;

s3) constructing a reset supporting part based on the maxillofacial face of the healthy side corresponding to the maxillofacial bone to-be-repaired area;

s4) constructing a reduction hole on the reduction support part based on the force application point of the maxillofacial bone to-be-repaired area.

The invention provides a method for constructing a model of a maxillofacial self-resetting external fixing device, which comprises the following steps: providing a three-dimensional model of a maxillofacial surface to be restored, wherein the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model. The maxillofacial area to be restored generally refers to the part of the maxillofacial area of a patient who needs to undergo maxillofacial bone restoration, and the three-dimensional model provided by the maxillofacial area restoration model generally needs to comprise a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model. The maxillofacial bone three-dimensional model generally refers to a maxillofacial bone three-dimensional model, at least needs to include a maxillofacial bone region to be repaired, which can be obtained by introducing CT data into software, and specifically can be software such as simplan, mics, and Proplan. The maxillofacial three-dimensional model generally refers to a three-dimensional model of the maxillofacial surface of a patient, which can be obtained by introducing CT data into software, such as mimics and medraw. After the maxillofacial three-dimensional model and the maxillofacial three-dimensional model are integrated, the maxillofacial three-dimensional model to be repaired can be obtained, and the software used in the integration process can be 3-matic software, geoimagic software and the like.

The method for constructing the model of the maxillofacial self-resetting external fixing device provided by the invention can also comprise the following steps: and constructing a base based on the maxillofacial surface around the area to be repaired of the maxillofacial bone. The base may be used to support the reduction support, and the base is typically distributed over the maxillofacial area around the area of the maxillofacial bone to be repaired and conforms to and extends along the maxillofacial area, which is typically normal tissue. The base may generally extend over and cover an area of the maxillofacial portion to better fit the maxillofacial portion as a whole to provide better support to the reduction support, e.g., the base may extend from the forehead to under the mandible. The thickness of the base may be adjusted by those skilled in the art in order to provide a suitable support strength, for example, the thickness of the base may be 2mm to 3 mm. In a preferred embodiment of the present invention, a specific method for constructing a base based on a maxillofacial region around a region of a maxillofacial bone to be repaired is: and constructing a base reference surface based on the maxillofacial face around the area to be repaired of the maxillofacial bone, and constructing a base based on the base reference surface. The base reference plane generally conforms to the maxillofacial surface surrounding the area of the maxillofacial bone to be repaired, and may generally extend from the forehead to below the mandible to better conform to the maxillofacial surface as a whole to provide better support. The resulting base is constructed by extending the base datum plane a distance outwardly (i.e., in a direction opposite to that facing the maxillofacial bone surface). The base reference surface extends outwardly a distance generally corresponding to the thickness of the base, for example, the distance may be 2mm to 3 mm.

The method for constructing the model of the maxillofacial self-resetting external fixing device provided by the invention can also comprise the following steps: and constructing a reset supporting part based on the maxillofacial face of the healthy side corresponding to the area to be repaired of the maxillofacial bone. The maxillofacial surface of the side strengthening face generally refers to the maxillofacial bone and the maxillofacial structure on one side (namely, the healthy tissue side) where the maxillofacial bone injury does not occur, the expected reset position of the maxillofacial surface can be obtained based on the side strengthening face, and because the human facial structure is basically in bilateral symmetry and the reset position of the maxillofacial surface is usually corresponding to the maxillofacial bone position of the part, the reasonable reset position of the maxillofacial surface can correspond to the reasonable reset position of the maxillofacial bone. The reduction support is generally used to provide a supporting force to a component (e.g., a reduction member, more specifically, a reduction nail, etc.) for traction of the maxillofacial bone during the maxillofacial bone reduction process. The reduction supporting part can be generally distributed on the maxillofacial surface of the area to be repaired of the maxillofacial bone and extends along the maxillofacial surface, and when the reduction supporting part is constructed, a certain gap is usually left between the reduction supporting part and the maxillofacial surface of the area because the area is the area to be repaired of the maxillofacial bone. In addition, since the maxillofacial surface on the healthy tissue side is often arched outward, there is often better stability in providing support. The thickness of the reduction support may be adjusted by those skilled in the art to provide a suitable support strength, for example, the thickness of the reduction support may be 2mm to 3 mm. In a preferred embodiment of the present invention, a specific method for constructing a reduction support surface based on a maxillofacial surface of a healthy side corresponding to a region of a maxillofacial bone to be repaired is as follows: the mirror image maxillofacial bone treats the maxillofacial face to the maxillofacial bone of strong side face that the restoration region is waited to correspond, constructs the support portion reference surface that resets based on the skin surface of the mirror image of the maxillofacial face of strong side face, constructs the support portion that resets based on the support portion reference surface that resets. The maxillofacial surface of the side face is mirrored to the maxillofacial bone to-be-repaired area, and expected reset positions of the maxillofacial surface and the maxillofacial bone can be obtained. The reduction support can be constructed by extending the reference reduction support outside (i.e., in the opposite direction with respect to the direction facing the maxillofacial bone surface) for a certain distance. The distance by which the reset support reference surface extends outwardly generally corresponds to the thickness of the reset support, for example, the distance may be 2mm to 3 mm.

The method for constructing the model of the maxillofacial self-resetting external fixing device provided by the invention can also comprise the following steps: and constructing a reset hole on the reset supporting part based on the acting point of the maxillofacial bone to-be-repaired area. In the construction of the reduction hole, it is generally necessary to provide the points of attack of the area of the maxillofacial bone to be repaired, which are generally determined on the basis of the shape, the position, etc. of the fracture. The reduction holes are typically used to provide a means for traction of the maxillofacial bone reduction (e.g., reduction members, more particularly, reduction nails, etc.). Generally speaking, be equipped with a plurality of reset holes on the support portion that resets, reset hole wears to locate on the support portion that resets usually to can treat the maxillofacial skeleton of restoreing and provide more even, accurate traction effect. The shape of the reset hole can be adjusted as required by those skilled in the art, generally speaking, the shape of the reset hole corresponds to that of the reset piece, for example, the reset hole may be cylindrical, the diameter of the reset hole may be 3-6 mm, and for example, the outer aperture of the reset hole may be larger than the inner aperture, so as to cooperate with the reset piece to better provide the traction force. In a preferred embodiment of the present invention, a specific method for constructing a reduction hole on a reduction support surface based on an impact point of a maxillofacial bone region to be repaired is as follows: and constructing a reset hole based on the projection of the acting point of the maxillofacial bone to-be-repaired area on the reset supporting part. After the force application point of the maxillofacial bone area to be repaired is determined, the force application point is projected to the reduction support part, the reduction hole can be constructed according to the projection direction and the shape of the reduction support part, and the projection direction generally corresponds to the inner side surface of the reduction support part, namely is vertical to the tangent plane of the inner side surface of the reduction support part.

The method for constructing the model of the maxillofacial self-resetting external fixing device provided by the invention can also comprise the following steps: and constructing a through hole on the reset supporting part, wherein the through hole is arranged in the reset supporting part in a penetrating way. The through hole can save material cost and assist accurate retention, so that the base and the reset supporting part are more stably fixed. In a preferred embodiment of the present invention, the reset supporting portion may be provided with a plurality of through holes, and the through holes are uniformly distributed on the reset supporting portion. In another preferred embodiment of the present invention, the area of the through hole accounts for 3% to 10% of the total area of the restoring support portion.

The invention provides a preparation method of a maxillofacial self-resetting external fixing device, which comprises the following steps: according to the construction method of the model of the maxillofacial self-resetting external fixing device provided by the first aspect of the invention, the obtained model of the maxillofacial self-resetting external fixing device is constructed, and the maxillofacial self-resetting external fixing device is prepared. The method for preparing the maxillofacial self-resetting external fixation device according to the model is known to those skilled in the art, and for example, 3D printing and the like can be adopted, and for example, the material used in the 3D printing process can be photosensitive resin and the like.

The third aspect of the invention provides a maxillofacial self-resetting external fixing device, which is constructed by the construction method of the maxillofacial self-resetting external fixing device model provided by the first aspect of the invention or prepared by the preparation method of the maxillofacial self-resetting external fixing device provided by the second aspect of the invention.

As shown in fig. 1, the invention provides a maxillofacial self-resetting external fixing device 1, the maxillofacial self-resetting external fixing device 1 comprises a base 11 for fitting the maxillofacial surface around a maxillofacial bone repair area, and a resetting support part 12 matched with the maxillofacial surface of a health side corresponding to the maxillofacial bone repair area, wherein the base 11 is connected with the resetting support part 12, and the resetting support part 12 is provided with a resetting hole 13. The maxillofacial self-resetting external fixing device 1 can be used for maxillofacial skeleton restoration, and can be attached to the maxillofacial face (namely normal tissue) around a maxillofacial bone area to be restored through the base 11, the resetting support part 12 is usually constructed according to the maxillofacial face of a side strengthening face corresponding to the maxillofacial bone area to be restored, the resetting support part 12 can be usually positioned above the maxillofacial bone area to be restored and has a certain gap with the maxillofacial bone area, and a supporting force is provided for a component (such as a resetting piece, more specifically a resetting nail and the like) for resetting the maxillofacial skeleton through the resetting hole 13 arranged on the resetting support part, so that the damaged maxillofacial skeleton can be dragged, and restoration of the maxillofacial skeleton is.

In the maxillofacial self-resetting external fixing device provided by the invention, the base 11 can be generally used for supporting the resetting support part, the base 11 is generally distributed on the maxillofacial part around the area to be repaired of the maxillofacial bone, is attached to the maxillofacial part of the area and extends along the maxillofacial part, and the area is generally normal tissue. The base 11 can generally extend over and cover a certain area of the maxillofacial portion to better fit the maxillofacial portion as a whole to provide better support for the reduction support, for example, the base 11 can include a forehead fit portion 111 and a mandible fit portion 112 to extend from the forehead to under the mandible; for another example, the thickness of the base 11 may be 2mm to 3 mm.

In the self-resetting maxillofacial external fixation device provided by the invention, the resetting support part 12 is generally used for providing a supporting force for a component (such as a resetting piece, more specifically a resetting nail and the like) for dragging the maxillofacial skeleton to reset in the process of resetting the maxillofacial skeleton. The shape of the reduction support 12 generally corresponds to the shape of the maxillofacial surface of the healthy tissue side of the patient, and since the maxillofacial surface of the healthy tissue side is generally arched outward, there is generally good stability in providing support. The reset support 12 generally needs to have a certain thickness to provide a good support effect, for example, the thickness of the reset support 12 may be 2mm to 3 mm.

In the maxillofacial self-resetting external fixing device provided by the invention, the resetting support part 12 is usually provided with a plurality of resetting holes 13, and the resetting holes are usually arranged on the resetting support part in a penetrating way, so that a more uniform and accurate traction effect can be provided for the maxillofacial skeleton to be repaired. The shape of the reset hole can be adjusted as required by those skilled in the art, generally speaking, the shape of the reset hole corresponds to that of the reset piece, for example, the reset hole may be cylindrical, the diameter of the reset hole may be 3-6 mm, and for example, the outer aperture of the reset hole 13 may be larger than the inner aperture, so as to cooperate with the reset piece to better provide the traction force.

In the maxillofacial self-resetting external fixing device provided by the invention, through holes 14 are also formed in the resetting support part 12, and the through holes 14 are uniformly distributed on the resetting support part 12. The through hole can save material cost and assist accurate retention, so that the base and the reset supporting part are more stably fixed. The shape and size of the through hole can be adjusted by those skilled in the art according to the needs, for example, the area of the through hole 14 accounts for 3% -10% of the total area of the reduction support portion 12; as another example, the through-hole 14 extends along a horizontal plane of a human body.

The fourth aspect of the invention provides a maxillofacial self-resetting external fixing system, which comprises a maxillofacial self-resetting external fixing device 1 provided by the third aspect of the invention; the maxillofacial self-resetting external fixation system further comprises a resetting piece 2 matched with the resetting hole 13, wherein the resetting piece 2 comprises a cortical bone embedding part 22 and a traction part 21. The reduction member 2 is usually matched with the reduction hole 13, the cortical bone embedding part 22 can be usually embedded into the cortical bone of the maxillofacial bone to be restored, and the traction part 21 can be matched with the reduction support part 12, so that a certain traction force is formed on the maxillofacial bone to be restored through the acting force between the traction part and the reduction support part 12, for example, the traction part 21 can pass through the reduction hole 13 and be exposed out of the reduction support part 12 of the maxillofacial self-resetting external fixation device 1, the outer aperture of the reduction hole 13 can be larger than the inner aperture, the part of the traction part 21 positioned outside the reduction support part 12 can be embedded into the outer side of the reduction hole 13, but does not pass through the reduction hole 13, so that the maxillofacial bone to be restored can be pulled through the traction part 21 from the outer side of the reduction support part. The shape and size of the cortical bone insertion portion 22 and the distraction portion 21 can be suitably adjusted by those skilled in the art, for example, the distraction portion 21 can be a meander, for example, a hole is usually formed in the maxillofacial bone to be restored, the cortical bone insertion portion 22 can extend into the hole, and the end portion thereof can extend to both sides, so as to achieve the relative fixation between the reduction member 2 and the maxillofacial bone to be restored. In a specific embodiment of the present invention, the restoring member 2 is formed in an omega shape as a whole.

The maxillofacial self-resetting external fixation system provided by the invention can further comprise a covering film for covering the maxillofacial self-resetting external fixation device 1 provided by the third aspect of the invention. The covering film is usually flexible, when the maxillofacial self-resetting external fixing device 1 is attached to the maxillofacial bone to-be-repaired area, the covering film can cover the surface of the maxillofacial self-resetting external fixing device 1, the covering area of the covering film can be usually slightly larger than that of the maxillofacial self-resetting external fixing device 1, and after the covering film is covered, negative pressure suction is carried out, so that the maxillofacial self-resetting external fixing device 1 can be stably attached to a target area through the covering film.

A fifth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the steps of the method for constructing a model of a maxillofacial self-resetting external fixation device provided in the first aspect of the present invention, or the steps of the method for preparing a maxillofacial self-resetting external fixation device provided in the second aspect of the present invention.

A sixth aspect of the present invention provides an apparatus comprising: a processor and a memory, the memory being used for storing a computer program, the processor being used for executing the computer program stored by the memory to cause the apparatus to execute the steps of the method for constructing the model of the maxillofacial self-resetting external fixation device provided by the first aspect of the invention or the steps of the method for preparing the maxillofacial self-resetting external fixation device provided by the second aspect of the invention.

A seventh aspect of the present invention provides an apparatus, which may comprise:

the three-dimensional model providing module is used for providing a three-dimensional model of a maxillofacial surface to be repaired, and the three-dimensional model of the maxillofacial surface comprises a maxillofacial bone three-dimensional model and a maxillofacial face three-dimensional model;

the base construction module is used for constructing a base based on the maxillofacial surface around the area to be repaired of the maxillofacial bone;

the restoration support part constructing module is used for constructing a restoration support part based on a maxillofacial face of a healthy side corresponding to a maxillofacial bone region to be repaired;

the restoring hole constructing module is used for constructing a restoring hole on the restoring supporting part based on the acting point of the maxillofacial bone area to be restored;

optionally, the method further includes: the through hole constructing module is used for constructing a through hole on the reset supporting part, and the through hole penetrates through the reset supporting part;

optionally, the method further includes: and the guide plate preparation module is used for preparing the maxillofacial self-resetting external fixing device according to the constructed maxillofacial self-resetting external fixing device model.

In the present invention, the operation principle of each module in the above device may refer to the above-mentioned construction method of the model of the maxillofacial self-resetting external fixation device and/or the preparation method of the maxillofacial self-resetting external fixation device, which is not described herein again.

The maxillofacial self-resetting external fixing device and the maxillofacial self-resetting external fixing system comprising the same are simple in structure and convenient to use, and can effectively improve the maxillofacial skeleton repairing effect in the application process, avoid repeated operations, avoid unnecessary injuries to a patient, greatly improve the treatment effect of maxillofacial injury related treatment, and have good industrialization prospects.

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.