Adjustable self-adaptive maxillofacial pressurizing and fixing device

Abstract

Aiming at the defects in the prior art, the invention aims to provide the adjustable self-adaptive maxillofacial pressurizing and fixing device, which has good individual suitability and can provide reliable and stable symmetrical pressurizing and fixing so as to solve the problems of unstable support, easy displacement of bone blocks and easy occurrence of asymmetric malformation in the traditional fixing mode. An adjustable self-adaptive maxillofacial pressurizing and fixing device comprises a fixing belt and an adjusting mechanism. The fixing band comprises a first warp, a plurality of pressing plates and a plurality of balls; the first warp is a flexible rope, and the pressing plate and the ball body are sequentially connected end to end in an abutting mode and alternately arranged on the first warp in a penetrating mode; the fixing band comprises a pressing plate and a ball, the pressing plate and the ball are both in sliding fit with the first warp, the fixing band further comprises second warp and third warp, the second warp and the third warp are both made of elastic materials, and the second warp, the first warp and the third warp are sequentially arranged at intervals. The effect of the maxillofacial surgery can be remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of maxillofacial fixation devices, specifically an adjustable adaptive maxillofacial pressure fixation device. Background Technology

[0002] Maxillofacial injuries are common in traffic accidents, construction site injuries, or other accidents. Some patients with maxillofacial tumors even undergo tumor reconstruction surgery, resulting in maxillofacial trauma and bone defects. Similarly, cosmetic maxillofacial surgeries, including orthognathic surgery, chin augmentation, and mandibular angle reduction, also create maxillofacial incisions, requiring surgeons to use specialized fixation and support devices to stabilize and reshape the maxillofacial region post-surgery.

[0003] Bandaging techniques refer to the use of bandaging materials to immobilize limbs or specific parts of the body for long or short periods to achieve purposes such as hemostasis, protection, fracture stabilization, and adjuvant treatment. In maxillofacial trauma and postoperative care, bandaging is a common method, with elastic bandages being widely used due to their convenience and effectiveness.

[0004] In maxillofacial surgery and postoperative recovery, fixation and support techniques are crucial for ensuring surgical outcomes and promoting healing. Currently used bandaging and fixation methods still have the following prominent problems:

[0005] (I) Traditional bandaging and fixation methods have obvious limitations. The commonly used bandage fixation method in clinical practice has two defects: First, its airtightness and rigidity make it difficult for doctors to dynamically observe and adjust the maxillofacial contour during the recovery period, and the support stability is insufficient, affecting the shaping effect; Second, the pressure distribution is uneven, which can easily cause local compression and increase patient discomfort.

[0006] (ii) There is a risk of bone displacement when using elastic bandage fixation. Although elastic bandage has a certain degree of adaptability, its pressure will decrease as facial swelling subsides, and it will not be able to provide a continuous and stable fixation force. This can easily lead to displacement of the repositioned bone fragments, affecting the surgical outcome and potentially causing secondary damage.

[0007] (iii) Insufficient personalized fit and symmetry support. Most existing fixation materials are standard sizes, which are difficult to fit the individual jawbone shape and cannot achieve precise fit and support. At the same time, there is a lack of specific auxiliary restraint mechanisms for facial symmetry, which may cause postoperative asymmetric deformities.

[0008] To address these issues, various maxillofacial compression fixation devices have been developed both domestically and internationally. For example, related patents (such as CN217853513U, CN220917457U, CN211433235U, CN215840201U, etc.) adapt to facial support needs through adjustable structures, but still have significant shortcomings: some devices are fixed in size, bulky, and difficult to fit diverse facial shapes; others lack dynamic adjustment capabilities, cannot adapt to postoperative swelling changes, and the risk of bone displacement remains.

[0009] Therefore, there is an urgent clinical need to develop an adjustable adaptive compression fixation device. This device should have personalized adjustment capabilities to flexibly adapt to the maxillofacial morphology of different patients; at the same time, it should provide symmetrical auxiliary support and continuous and stable compression fixation, ensuring postoperative morphology, reducing the risk of bone fragment displacement, reducing the frequency of replacement, alleviating the burden on medical staff, and providing reliable support for postoperative recovery in maxillofacial surgery. Summary of the Invention

[0010] To address the shortcomings of existing technologies, the present invention aims to provide an adjustable adaptive maxillofacial compression fixation device that has good individual adaptability and can provide reliable and stable symmetrical compression fixation, thereby solving the problems of unstable support, easy bone displacement, and easy asymmetrical deformity in traditional fixation methods.

[0011] The technical solution adopted by the present invention to solve its technical problem is: an adjustable adaptive maxillofacial pressure fixation device, including a fixation strap and an adjustment mechanism for adjusting the fixation pressure of the fixation strap;

[0012] The fixing belt includes a first warp, several pressure plates, and several spheres; the first warp is a flexible rope, and the pressure plates and the spheres are connected end to end in sequence and alternately threaded on the first warp; both the pressure plates and the spheres are slidably engaged with the first warp so that the first warp can bend around the sphere from the point where the pressure plate and the sphere meet;

[0013] The fixing belt also includes a second warp and a third warp, both of which are made of elastic material, and the second warp, the first warp, and the third warp are arranged alternately in sequence;

[0014] The pressure plate is provided with a first through hole on one side of the first warp and a second through hole on the other side of the first warp. The pressure plate is also slidably sleeved on the second warp through the first through hole and slidably sleeved on the third warp through the second through hole.

[0015] The first warp is joined at both ends to form a closed loop structure; the adjustment mechanism is connected to the first warp to adjust the size of the loop structure formed by the first warp, thereby adjusting the fixing pressure of the fixing belt.

[0016] Furthermore, both the second and third meridians are silicone tubes.

[0017] Furthermore, both the pressure plate and the sphere are made of silicone.

[0018] Furthermore, the end face of the pressure plate is provided with a spherical limiting groove for rotating cooperation with the end of the ball that abuts against it, and the pressure plate abuts against the end of the corresponding ball through the spherical limiting groove.

[0019] Furthermore, the width of the pressure plate is 3 to 8 mm.

[0020] Furthermore, the maximum distance between adjacent pressure plates is c, and the value of c ranges from 3 to 8 mm.

[0021] Furthermore, the adjustment mechanism includes a bracket and a rotating shaft mounted on the bracket, the rotating shaft being connected to the first warp so as to wind or unwind the first warp when the rotating shaft rotates;

[0022] The adjustment mechanism also includes an anti-loosening mechanism for locking the position of the rotating shaft.

[0023] Furthermore, the anti-loosening mechanism includes a ratchet and a pawl, the ratchet is mounted on the rotating shaft, and the pawl is mounted on the bracket and cooperates with the ratchet.

[0024] The beneficial effects of this invention are:

[0025] The adjustable adaptive maxillofacial compression fixation device of the present invention provides necessary buffering, compression, and fault tolerance through the second and third meridians made of elastic material on both sides of the first meridian, protecting the skin and adapting to the irregularity of soft tissue. The middle part, which is composed of a sphere and a pressure plate connected by the first meridian, essentially creates a flexible hinge network with extremely high two-dimensional degrees of freedom, responsible for transmitting and maintaining the overall structural support force. This allows for high-precision fitting of complex bony anatomy structures in the form of discrete points, achieving precise fitting with the bone surface and stable symmetrical compression fixation. It has good individual adaptability and solves the problems of unstable support, bone block displacement, and asymmetrical deformity in traditional fixation methods, which can significantly improve the effect of maxillofacial surgery.

[0026] During use, the fixed pressure can be adjusted according to the actual situation through the adjustment mechanism, making it convenient to use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the maxillofacial pressure fixation device of the present invention;

[0028] Figure 2 This is a schematic diagram showing the arrangement of the pressure plate and the sphere;

[0029] Figure 3 This is a structural diagram of the pressure plate;

[0030] Figure 4 This is a schematic diagram of the structure of a sphere;

[0031] Figure 5 This is a schematic diagram of the adjustment mechanism structure of the present invention;

[0032] The figure shows: a fixing belt 11, an adjusting mechanism 12, a first meridian 111, a second meridian 112, a third meridian 113, a pressure plate 114, a sphere 115, a bracket 121, a rotating shaft 122, a ratchet 123, a pawl 124, a central hole 1141, a first through hole 1142, a second through hole 1143, a spherical limiting groove 1144, and a center hole 1151. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1 , Figure 2As shown, an adjustable adaptive maxillofacial pressure fixation device of the present invention includes a fixation strap 11 and an adjustment mechanism 12 for adjusting the fixation pressure of the fixation strap 11. The fixation strap 11 includes a first warp 111, a plurality of pressure plates 114, and a plurality of spheres 115. The first warp 111 is a flexible rope. The pressure plates 114 and the spheres 115 are sequentially abutted end to end and alternately threaded on the first warp 111. Both the pressure plates 114 and the spheres 115 are slidably engaged with the first warp 111, thereby allowing both the pressure plates 114 and the spheres 115 to slide on the first warp 111, causing the length of the first warp line between the abutting pressure plates and the spheres to change, and thus allowing the first warp 111 to bend freely around the spheres 115 from the point where the pressure plates 114 and the spheres 115 meet. The fixing band 11 further includes a second warp 112 and a third warp 113, both of which are made of elastic material. Elastic materials can undergo elastic deformation and be bent. The second warp 112, the first warp 111, and the third warp 113 are arranged alternately. The pressure plate 114 has a first through hole 1142 on one side of the first warp 111 and a second through hole 1143 on the other side of the first warp 111. The pressure plate 114 is also slidably fitted onto the second warp 112 through the first through hole 1142 and onto the third warp 113 through the second through hole 1143. The two ends of the first warp 111 are connected to form a closed loop structure. The adjusting mechanism 12 is connected to the first warp 111 to adjust the size of the loop structure formed by the first warp 111, thereby adjusting the fixing pressure of the fixing band 11.

[0035] In this embodiment of the invention, the pressure plate 114 has a centrally symmetrical structure. The pressure plate 114 passes through the first meridian 111 through the central hole 1141 provided thereon and coaxial with the axis of symmetry of the pressure plate. The sphere 115 passes through the central hole 1151 of the sphere 111. The thickness of the pressure plate 114 is equal to the diameter of the sphere 115.

[0036] In some embodiments, the first warp 111 is made of nylon rope (thread); in some embodiments, the first warp 111 is made of polyester rope (thread), polyester-cotton rope (thread), or pure cotton rope (thread), etc. The first warp 111 is a flexible rope, which allows it to be bent and deformed at will.

[0037] The principle of this invention is as follows: Figure 1As shown, the fixation strap 11 is placed on the patient's maxillofacial region through the annular structure formed by the first meridian 111. The adjustment mechanism 12 is placed on top of the patient's head to avoid compressing the surgical area. Then, the shape of the fixation strap 11 is adjusted to produce adaptive bending deformation, ensuring that the fixation straps on both sides fit the patient's mandibular border and below the zygomatic arch, respectively. Next, the size of the annular structure formed by the first meridian 111 is adjusted by the adjustment mechanism 12 to make it smaller. As the annular structure shrinks, the pressure plates at both ends of the fixation are compressed, causing the ball and pressure plates to pull the second meridian 112 and the third meridian 113 to contract. During this process, the fixation strap adjusts its posture autonomously according to the patient's jawbone shape to achieve precise fit with the patient's bone surface. The doctor can control the adjustment range by observing the fit on the patient's face and asking the patient about their sensations until the ideal pressure fixation effect is achieved.

[0038] This invention provides the necessary buffering, compression, and fault tolerance through the second and third meridians, which are made of elastic material on both sides of the first meridian, protecting the skin and adapting to the irregularity of soft tissue. The middle part, which is composed of a sphere and a pressure plate connected by the first meridian, essentially creates a flexible hinge network with extremely high two-dimensional degrees of freedom. This network is responsible for transmitting and maintaining the overall structural support force, thereby enabling high-precision fitting of complex bony anatomical structures in the form of discrete points, achieving precise fitting with the bone surface and stable symmetrical compression fixation.

[0039] The second meridian 112 and the third meridian 113 can be made of various existing elastic materials, such as rubber, silicone, and polyurethane. In this embodiment of the invention, both the second meridian 112 and the third meridian 113 are made of silicone. Silicone has good elasticity and better biocompatibility. Furthermore, both the second meridian 112 and the third meridian 113 are made of silicone tubing. Compared to a solid structure, the silicone tubing is a hollow structure, which can better adapt to the shape of the patient's maxillofacial structure, thereby improving the wearing comfort and fixation effect of the device.

[0040] The pressure plate 114 and the sphere 115 can be made of materials such as plastic, rubber, or silicone. Because silicone has better biocompatibility, it is preferred to use silicone for both the pressure plate 114 and the sphere 115 in this invention.

[0041] In some embodiments, the end face of the pressure plate 114 is a plane, and the end of the ball 115 abuts against the plane of the end face of the pressure plate. For example... Figure 2 and Figure 3As shown in the embodiment of the present invention, the end face of the pressure plate 114 is provided with a spherical limiting groove 1144 for rotatably engaging with the end of the ball 115 that abuts against it. The pressure plate 114 abuts against the end of the corresponding ball 115 through the spherical limiting groove 1144. That is, the end of the ball 115 abuts within the spherical limiting groove 1144 on the end face of the pressure plate 114. The ball 115 abuts against the pressure plate 114 through the spherical limiting groove 1144, resulting in better force transmission between the ball 115 and the pressure plate, which can further improve the pressure and fixing effect of the fixing belt.

[0042] When two adjacent pressure plates 114 are parallel to each other, the angle between the two pressure plates 114 is 180°, and the distance between them is at its maximum. For example... Figure 2 and Figure 3 As shown, let the width of the pressure plate 114 be b, and the maximum distance between adjacent pressure plates 114 be c. Theoretically, the smaller the value of b, the better the fit between the fixation strap and the patient's maxillofacial region, and the better the pressure fixation effect of the device, but the greater the difficulty in manufacturing the device. Taking all factors into consideration, after experimentation, in this invention, a width of 3-8 mm for the pressure plate 114 is sufficient to achieve the required pressure fixation effect. The value of c affects the bending deformation capacity of the fixation strap. Provided that the bending deformation capacity of the fixation strap meets the usage requirements, the smaller the value of c, the better the fit between the fixation strap and the patient's maxillofacial region. Experimentation shows that, provided the bending deformation capacity of the fixation strap is met, a value of c ranging from 3-8 mm is sufficient to achieve the ideal fixation and pressure effect.

[0043] In some embodiments, the adjusting mechanism is a snap-fit ​​or latch disposed on the annular structure formed by the first meridians. For example... Figure 5 As shown in this embodiment of the invention, the adjusting mechanism 12 includes a bracket 121 and a rotating shaft 122 mounted on the bracket 121. The rotating shaft 122 is connected to the first warp 111 so that it can wind up or unwind the first warp 111 when the rotating shaft 122 rotates. The adjusting mechanism 12 also includes an anti-loosening mechanism for locking the position of the rotating shaft 122. The anti-loosening mechanism is used to prevent the rotating shaft 122 from rotating in the direction of releasing the first warp 111.

[0044] When it is necessary to increase the fixing pressure of the device, the rotating shaft 122 is rotated in the direction of winding the first warp 111, so that the first warp 111 is wound around the rotating shaft 122 and the ring structure formed by the first warp 111 is smaller, thereby increasing the fixing pressure of the fixing belt 11; when it is necessary to decrease the fixing pressure of the device, the anti-loosening mechanism is released and the rotating shaft 122 is rotated in the opposite direction (in the direction of releasing the first warp), so that the first warp 111 is released from the rotating shaft 122 and the ring structure formed by the first warp 111 is larger, thereby decreasing the fixing pressure of the fixing belt 11.

[0045] Anti-loosening mechanisms can be locking screws, pins, etc., that mate with the shaft. For example... Figure 5 As shown in the embodiment of the invention, the anti-loosening mechanism includes a ratchet 123 and a pawl 124. The ratchet 123 is mounted on the rotating shaft 122, and the pawl 124 is mounted on the bracket 121 and cooperates with the ratchet 123. The pawl 124 cooperates with the ratchet 123 to prevent the rotating shaft 122 from rotating in the direction of the first release meridian. The operation of the above-described anti-loosening mechanism is more convenient.

[0046] Understandably, in order to enable the pawl 124 and the ratchet 123 to automatically engage, a return spring can be provided on the bracket 121 to enable the pawl 124 and the ratchet 123 to engage.

[0047] In this invention, see Figure 1 The two ends of the second meridian 112 and the third meridian 113 can also be connected to form a ring structure.

Claims

1. An adjustable, self-adapting maxillofacial compression fixation device, characterized by: The fixing belt (11) comprises a first warp (111), a plurality of pressing plates (114) and a plurality of balls (115); the first warp (111) is a flexible rope, the pressing plates (114) and the balls (115) are sequentially and abuttingly connected, and are alternately arranged on the first warp (111); the pressing plates (114) and the balls (115) are both in sliding fit with the first warp (111), so that the first warp (111) can be bent around the balls (115) from the abutting connection between the pressing plates (114) and the balls (115). The fixing belt (11) further comprises a second warp (112) and a third warp (113); the second warp (112) and the third warp (113) are both made of elastic material; the second warp (112), the first warp (111) and the third warp (113) are sequentially and alternately arranged. The pressing plate (114) is provided with a first through hole (1142) on one side of the first warp (111), and is further provided with a second through hole (1143) on the other side of the first warp (111); the pressing plate (114) is slidably sleeved on the second warp (112) through the first through hole (1142), and is slidably sleeved on the third warp (113) through the second through hole (1143). The first warp (111) is connected with the adjusting mechanism (12) to adjust the size of the ring structure formed by the first warp (111), and further adjust the fixing pressure of the fixing belt (11). The second warp (112) and the third warp (113) are both silica gel tubes.

2. An adjustable adaptive maxillofacial compression fixation device as in claim 1, wherein: The pressing plate (114) and the ball (115) are both made of silica gel.

3. An adjustable adaptive maxillofacial compression fixation device as claimed in claim 1 or 2, characterized in that: The end surface of the pressing plate (114) is provided with a spherical limiting groove (1144) for rotationally fitting with the end portion of the ball (115) abutting thereto; the pressing plate (114) abuts with the end portion of the corresponding ball (115) through the spherical limiting groove (1144).

4. An adjustable adaptive maxillofacial compression fixation device as in claim 1, wherein: The width of the pressing plate (114) is 3-8 mm.

5. An adjustable adaptive maxillofacial compression fixation device as in claim 1, wherein: The maximum distance between adjacent pressing plates (114) is c, and the value range of c is 3-8 mm.

6. An adjustable adaptive maxillofacial compression fixation device as claimed in any one of claims 1 to 5, wherein: The adjusting mechanism (12) comprises a support (121) and a rotating shaft (122) installed on the support (121); the rotating shaft (122) is connected with the first warp (111) to wind or release the first warp (111) when the rotating shaft (122) rotates.

7. An adjustable adaptive maxillofacial compression fixation device as in claim 1, wherein: The adjusting mechanism (12) further comprises a lock mechanism for locking the position of the rotating shaft (122). The lock mechanism comprises a ratchet wheel (123) and a pawl (124); the ratchet wheel (123) is installed on the rotating shaft (122); the pawl (124) is installed on the support (121) and cooperates with the ratchet wheel (123).

8. An adjustable adaptive maxillofacial compression fixation device as in claim 7, wherein: ​

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