Bone micro-perforation positioning and drug delivery guide

Abstract

The utility model belongs to the field of dental instruments, concretely is a kind of bone microperforation positioning and drug delivery guide plate. Including guide plate body, the buckle part matched with invisible mouthguard is equipped on guide plate body, and it is detachably connected with invisible mouthguard by it;Guide plate body is equipped with several array through positioning hole, for guiding surgical instrument to carry out bone microperforation;Positioning hole is communicated with the flow overflow passage inside guide plate body, and flow overflow passage is used to discharge coolant, reduce local temperature when drilling and grinding;Guide plate body and the side of gum contact still be equipped with medicine accommodating groove. Adopt this device to be able to improve the accuracy, safety and therapeutic effect of bone microperforation operation.

Description

Technical Field

[0001] This utility model belongs to the field of dental instruments, specifically a bone microperforation positioning and drug delivery guide. Background Technology

[0002] In the field of orthodontic treatment, bone microperforation technology has received widespread attention in recent years as an auxiliary method to accelerate tooth movement. This technique involves making tiny perforations in specific areas of the alveolar bone to stimulate local bone metabolism, thereby accelerating tooth movement under orthodontic forces and shortening the treatment period. However, existing bone microperforation techniques have some limitations in clinical application:

[0003] Due to the lack of precise positioning tools, existing techniques are prone to deviations in determining the perforation location, potentially damaging important anatomical structures such as tooth roots and neurovascular bundles, increasing surgical risks. Furthermore, manual operation makes it difficult to precisely control the depth and angle of the perforation, resulting in uneven and unpredictable stimulation effects. This lack of precision affects the safety and treatment outcome of the surgery. Traditional bone microperforation surgery typically requires a larger surgical incision and a deeper perforation depth to ensure effective bone metabolism stimulation. However, this approach increases tissue damage, leading to exacerbated postoperative complications such as swelling and pain, and prolonging patient recovery time. Moreover, after bone microperforation, local application of bone metabolism-promoting drugs is often necessary to enhance the treatment effect; however, due to the lack of precise drug delivery methods, the drug easily diffuses into the surrounding tissues, resulting in reduced local drug concentration and unstable efficacy.

[0004] In summary, existing bone microperforation techniques suffer from insufficient precision, excessive trauma, and unstable efficacy, limiting their application in orthodontic treatment and patient comfort. Therefore, there is an urgent need for a structure that can improve surgical precision, reduce tissue trauma, and achieve precise drug delivery. Utility Model Content

[0005] To address the above issues, this invention provides a bone microperforation positioning and drug delivery guide. The guide's structure is customized to match the clear aligner using the patient's three-dimensional imaging data, ensuring a strict correspondence between the positioning holes and the target area for alveolar bone perforation, guaranteeing precise instrument guidance. Furthermore, the guide features overflow channels and drug-receiving grooves for draining coolant and directly introducing medication. Using this device improves the precision, safety, and treatment effectiveness of bone microperforation surgery.

[0006] To achieve the above objectives, the present invention specifically employs the following technical means:

[0007] A bone microperforation positioning and drug delivery guide includes a guide body with a fastening part that matches a clear aligner, allowing for detachable connection to the clear aligner. The guide body has a plurality of arrayed through-holes for guiding surgical instruments to perform bone microperforation. The positioning holes communicate with an overflow channel inside the guide body for draining coolant and reducing local temperature during drilling. The side of the guide body that contacts the gingiva also has a drug receiving groove.

[0008] Furthermore, the fastening part is provided with a fastening hole, and the fastening part and the brace protrusion on the invisible brace are stably connected through a plug-in structure.

[0009] Furthermore, the invisible braces are integrally formed with the braces protrusion.

[0010] Furthermore, the thickness of the guide plate body is 2mm, the diameter of the positioning holes is 0.5-1.0mm, and they are evenly distributed vertically 5mm below the gingival papilla.

[0011] Furthermore, the overflow channel is a pipe structure that communicates with the positioning hole and extends to the edge of the guide plate body, used to discharge coolant to reduce the local temperature during drilling.

[0012] Furthermore, the microneedle patch is fixed to the microperforation via the drug-receiving groove of the guide plate body, for sustained drug release and introduction into the microperforation.

[0013] Furthermore, the position of the positioning hole is planned based on the patient's three-dimensional image data, maintaining a safe distance from the tooth root, with a positioning error of less than 0.5mm.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] This invention achieves a detachable connection between the guide plate and the invisible aligner through a fastening part on the guide plate body that matches the aligner. The position of the positioning hole is planned based on the patient's three-dimensional imaging data, ensuring a strict correspondence between the hole and the target area for drilling into the alveolar bone. Therefore, the design of the positioning hole ensures precise guidance of the surgical instruments while maintaining a safe distance from the tooth root, with a positioning error controlled within 0.5mm.

[0016] Due to the precise guidance of the positioning holes and the guide plate's thickness of only 2mm, this invention enables more precise surgical procedures, reducing surgical incisions and perforation depth. Compared to traditional bone microperforation techniques that require larger incisions and deeper perforations, this device reduces tissue damage, thereby lowering the incidence of postoperative complications such as swelling and pain, and shortening patient recovery time.

[0017] The guide plate body has a drug-receiving groove on the side that contacts the gingiva. This structure fixes the microneedle patch at the microperforation, enabling sustained drug release and direct introduction into the microperforation. This design ensures a sustained high concentration of drug locally, avoiding drug diffusion to surrounding tissues and improving the stability and reliability of the treatment effect.

[0018] The overflow channel inside the guide plate body connects with the positioning hole and extends to the edge of the guide plate, effectively draining coolant and reducing the local temperature during drilling. This prevents tissue damage due to overheating, further improving the safety of the surgery and providing additional protection for bone microperforation surgery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the combination of the guide plate and the invisible braces in a specific embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of a guide plate in a specific embodiment of this utility model;

[0021] Figure 3 This is another schematic diagram of the guide plate in a specific embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional view of the guide plate in a specific embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the fastening part in a specific embodiment of this utility model;

[0024] The numbers in the diagram are as follows: 1. Invisible braces; 11. Braces protrusion; 2. Guide plate body; 21. Fastening part; 22. Concave hole; 23. Medication reservoir; 24. Positioning hole; 25. Overflow channel. Detailed Implementation

[0025] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions are omitted in the drawings.

[0027] Please see Figure 1 This invention proposes a bone microperforation positioning and drug delivery guide plate, which is fastened to an invisible brace 1. The invisible brace 1 has a brace protrusion 11, and the guide plate body 2 has a fastening part 21 that matches the brace protrusion 11. Through the insertion structure of the fastening part 21 and the brace protrusion 11, the guide plate body 2 and the invisible brace 1 form a stable connection. The invisible brace and the brace protrusion 11 are integrally formed, and the elastic modulus of the brace achieves the wrapping effect on the dentition, ensuring that the guide plate body 2 can still fit tightly during orthodontic treatment due to dynamic tooth displacement.

[0028] Please see Figure 2 and Figure 3 The guide plate body 2 has five rows of through-holes 24, each with a diameter of 0.5–1.0 mm, evenly distributed vertically 5 mm below the gingival papilla, used to guide surgical instruments for micro-perforation of the bone. The guide plate body 2 is 2 mm thick and works in conjunction with the instrument's limiting device to ensure precise control of the perforation depth. The positions of the positioning holes 24 are planned based on the patient's three-dimensional imaging data, using computer-aided design to maintain a safe distance from the tooth root and neurovascular bundle, with a positioning error of less than 0.5 mm. Figure 3 As shown, the side of the guide plate body 2 that contacts the gum is provided with a drug receiving groove 23 for fixing the microneedle patch to achieve sustained release and targeted delivery of the drug.

[0029] Please see Figure 4 The guide plate body 2 has an overflow channel 25 inside. This overflow channel 25 is a pipe structure that communicates with the positioning hole 24 and extends to the edge of the guide plate body 2. The overflow channel 25 is used to drain coolant, reduce the local temperature during drilling, prevent tissue damage due to overheating, and improve surgical safety. During the operation, coolant enters the overflow channel 25 through the positioning hole 24, effectively controlling the temperature of the surgical area.

[0030] Please see Figure 5 The fastening part 21 has a fastening hole, which forms a stable connection with the protrusion 11 on the invisible braces 1 through an insertion structure. Multiple fastening parts 21 fasten with the protrusion 11 on the invisible braces 1, ensuring simple assembly and preventing rotational displacement, thus meeting the precision requirements of the surgery. The guide plate body 2 is detachably connected to the invisible braces 1 through this structure. After the surgery, the guide plate body 2 can be removed and a microneedle patch can be inserted for bone microperforation drug delivery.

[0031] In some embodiments, the guide plate body 2 is manufactured in segments according to the surgical area, including anterior tooth area and bilateral posterior tooth area, to better fit the surgical area and ensure surgical precision. The anterior tooth area can be placed buccally to the gingival side of the lateral incisor, and the posterior tooth area guide plate can be placed between the first premolar and the second premolar, and between the first molar and the second molar.

[0032] In some embodiments, the microneedle patch medication is fixed to the microperforation via the drug receiving groove 23 of the guide plate body 2. After surgery, the retention space reserved in the drug receiving groove 23 is used to assemble the microneedle patch, enabling targeted drug delivery without flap flapping. Simply placing the microneedle patch into the drug receiving groove 23 allows for sustained release and direct delivery of the medication into the microperforation, preventing drug diffusion to surrounding tissues, improving local efficacy, and further accelerating tooth movement.

[0033] In this embodiment, the design of the guide plate body 2 is customized based on the patient's three-dimensional imaging data (CBCT) combined with intraoral scans. Through computer-aided design, the distribution of the positioning holes 24 strictly corresponds to the target area of ​​the alveolar bone, ensuring precise guidance of surgical instruments. During the design process, the algorithm optimizes the perforation sites, avoiding key anatomical structures such as tooth roots and neurovascular bundles, and the positioning error is controlled within 0.5mm. The guide plate body 2 is made of biocompatible photopolymer 3D printing resin, which has good biocompatibility and can be reused through high-temperature and high-pressure sterilization, reducing treatment costs.

[0034] In this embodiment, the guide plate body 2 is used in conjunction with the invisible aligner 1 to address the difficulties and slowness of anterior tooth intrusion during invisible orthodontic treatment. Precise bone micro-perforation optimizes the tooth movement path. The guide plate body 2 is stably connected to the aligner protrusion 11 on the invisible aligner 1 via the fastening part 21, allowing for guide plate installation without replacing the patient's existing aligners, thus enhancing treatment efficiency. After the surgery, the invisible aligner 1 continues to be worn until the completion of this treatment phase, achieving a seamless integration of orthodontic treatment and bone micro-perforation technology.

[0035] The procedure for using this device is as follows:

[0036] First, patients need to undergo oral scans and cone-beam computed tomography (CBCT) scans to obtain three-dimensional images of the teeth and alveolar bone, providing a basis for subsequent personalized design. Based on the oral scan data, a one-piece molded invisible brace with raised section 11 is designed. After the design is completed, the invisible brace is manufactured using 3D printing technology. The material used has appropriate elasticity to adapt to the dynamic movement of teeth during the orthodontic process.

[0037] Based on the data from the invisible braces and CBCT scan, the guide plate body 2 was designed to ensure that the positioning holes on it precisely correspond to the micro-perforations in the alveolar bone. The guide plate is manufactured using photopolymerization 3D printing technology and selected biocompatible materials to ensure safety and durability.

[0038] Before the surgery begins, the dentist places the pre-made invisible aligners onto the patient's teeth, ensuring a tight fit to lay the foundation for the subsequent fixation of the guide plate. The guide plate is then connected to the protrusions on the invisible aligners via the fastening mechanism, securing it stably within the patient's mouth and providing precise positioning support for the surgery.

[0039] The dentist guides the drill bit through the positioning hole 24 on the guide plate to perform micro-perforation of the bone, ensuring that the perforation location avoids critical structures such as tooth roots and nerves and blood vessels. During the drilling process, the overflow channel 25 inside the guide plate is connected to the positioning hole 24 to drain the coolant.

[0040] After the bone microperforation surgery is completed, the doctor removes the guide plate body 2 from the clear aligner. The microneedle patch can then be fixed to the microperforation site through the drug receiving slot 23 on the guide plate body 2. The guide plate body 2 is then reinstalled on the clear aligner 1 to complete targeted drug delivery.

[0041] The specific embodiments of the utility model have been described above. It should be understood that the utility model is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; those skilled in the art can make various modifications or alterations within the scope of the claims, and make several simple deductions, modifications or substitutions, which do not affect the substantive content of the utility model.

Claims

1. A bone microperforation positioning and drug delivery guide, characterized in that, The device includes a guide plate body (2), which has a fastening part (21) that matches the invisible braces (1) and is detachably connected to the invisible braces (1). The guide plate body (2) has several arrayed through positioning holes (24) for guiding surgical instruments to perform bone micro-perforation. The positioning holes (24) are connected to an overflow channel (25) inside the guide plate body (2), which is used to drain coolant and reduce the local temperature during drilling. The side of the guide plate body (2) that contacts the gums is also provided with a drug receiving groove (23).

2. The bone microperforation positioning and drug delivery guide plate according to claim 1, characterized in that, The fastening part (21) is provided with a fastening hole, and the fastening part (21) and the brace protrusion (11) on the invisible brace (1) are stably connected by a plug-in structure.

3. The bone microperforation positioning and drug delivery guide plate according to claim 1, characterized in that, The invisible braces (1) and the braces protrusion (11) are integrally formed.

4. The bone microperforation positioning and drug delivery guide plate according to claim 1, characterized in that, The thickness of the guide plate body (2) is 2mm, and the diameter of the positioning hole (24) is 0.5-1.0mm, and they are evenly distributed vertically 5mm below the gingival papilla.

5. The bone microperforation positioning and drug delivery guide plate according to claim 1, characterized in that, The overflow channel (25) is a pipe structure that communicates with the positioning hole (24) and extends to the edge of the guide plate body (2) to discharge coolant to reduce the local temperature during drilling.

6. The bone microperforation positioning and drug delivery guide plate according to claim 1, characterized in that, The microneedle patch is fixed to the microperforation through the drug receiving groove (23) of the guide plate body (2) for sustained drug release and introduction into the microperforation.

7. The bone microperforation positioning and drug delivery guide plate according to claim 1, characterized in that, The position of the positioning hole (24) is planned based on the patient's three-dimensional image data, maintaining a safe distance from the tooth root, with a positioning error of less than 0.5 mm.

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