Minimally invasive root cutting system and surgical method thereof

Abstract

The invention relates to the technical field of tooth root cutting, in particular to a minimally invasive root cutting system and a surgical method.The minimally invasive root cutting system comprises a precise positioning device, a double-hole positioning guide plate, a tooth socket, a trepanning device, a crown root separating device and an ejection device.When a diseased tooth root needs to be cut, the precise positioning device is started to scan the tooth socket, and the double-hole positioning guide plate is printed; at the moment, the double-hole positioning guide plate is placed on a tooth groove, two small holes are formed in the two ends of the lesion tooth root through the hole forming device under positioning of the double-hole positioning guide plate, then the crown root separating device is started to separate the tooth root from the tooth crown through the small hole in the upper portion, and then the ejection device is started to lift the tooth root from the small hole in the lower portion in a vibration mode; the tooth root is taken out from the upper small hole, so that minimally invasive cutting of the tooth root is achieved, the alveolar bone between the two small holes is reserved, and healing is fast after an operation.

Description

Technical Field

[0001] This invention relates to the field of tooth root resection technology, and in particular to a minimally invasive root resection system and surgical method thereof. Background Technology

[0002] Minimally invasive root canal resection is a minimally invasive dental procedure for tooth preservation. Its core is to remove the diseased tooth root through a minimally invasive incision, while preserving the healthy tooth root and crown, thereby preserving the natural tooth and avoiding extraction. It is a supplementary or advanced procedure to root canal treatment and is suitable for cases where the tooth root cannot be cured by conventional root canal treatment.

[0003] In practice, existing techniques for removing tooth roots involve cutting and removing the affected root at the bifurcation point. These techniques require completely removing the alveolar bone on the outer side of the diseased tooth root before removing it. Because the alveolar bone is completely removed, the gums will collapse inward after suturing without the support of the alveolar bone. Furthermore, existing techniques are too invasive, resulting in slower postoperative healing.

[0004] Based on this, the present invention designs a minimally invasive root resection system and surgical method to solve the above problems. Summary of the Invention

[0005] In view of the problem of excessive trauma in root resection surgery in the above or existing technologies, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a minimally invasive root resection system.

[0007] As a preferred embodiment of the minimally invasive root resection system of the present invention, it includes a precise positioning device; The precision positioning device includes an oral CBCT machine, a 3D printer connected to the oral CBCT machine, and a double-hole positioning guide plate printed by the 3D printer. The dual-hole positioning guide plate includes a dental brace, a bonding plate disposed on the side wall of the dental brace, an upper positioning hole at the upper end of the bonding plate and a lower positioning hole at the lower end of the bonding plate. The end of the dental brace is connected to a dental alveolar bone.

[0008] As a preferred embodiment of the minimally invasive root resection system of the present invention, the dual-hole positioning guide plate further includes a connecting rod, and the end of the dental aligner is provided with a connecting rod.

[0009] As a preferred embodiment of the minimally invasive root resection system of the present invention, wherein: the alveolar bone includes alveolar bone, the end of the dental crown is provided with alveolar bone, an upper hole is provided on the alveolar bone inside the upper positioning hole, and a lower hole is provided on the alveolar bone inside the lower positioning hole.

[0010] As a preferred embodiment of the minimally invasive root cutting system of the present invention, it further includes an opening device.

[0011] As a preferred embodiment of the minimally invasive root resection system of the present invention, it further includes a coronal root separation device.

[0012] As a preferred embodiment of the minimally invasive root resection system of the present invention, it further includes an ejection device.

[0013] As a preferred embodiment of the minimally invasive root resection system of the present invention, the ejection device includes an ejector, one end of which is provided with a working end, the other end of which is provided with a working end, and the lower end of the ejector is U-shaped and has a depth mark at the end.

[0014] To better achieve the objectives of this invention, this invention also provides a surgical method for a minimally invasive root resection system, comprising the following steps: Step 1: Obtain three-dimensional data of alveolar bone and tooth root using an oral CBCT machine to determine the root resection plan and the precise three-dimensional position, angle, and depth of the upper and lower holes; Step 2: Based on the planning data from Step 1, fabricate a double-hole positioning guide plate using a 3D printer; Step 3: Try on the double-hole positioning guide plate in the inlet and calibrate it. Then, through the upper positioning hole, use a hole-making device to make an upper hole in the bone cortex to expose the end of the tooth root near the crown. Through the lower positioning hole, make a lower hole in the apical region of the target tooth root. Step 4: Through the upper hole, use a crown-root separation device to precisely grind away the connection between the crown and the target root at the root bifurcation, so that the root and crown are completely separated; Step 5: Insert the working end into the alveolar bone through the lower hole and place it against the middle and lower root surface of the target tooth root. Then, apply a gentle vibration force to the ejector and the working end using a vibration source. At this time, the working end will transmit an upward force to the tooth root, which will drive the tooth root to move towards the upper hole. Since the tooth root has been separated from the crown and is subjected to an upward thrust, the entire tooth root will be pushed upward completely and finally removed through the upper hole or gingival gap. If the tooth root is stuck in the upper hole and difficult to remove, a hole-opening device can be used to further shorten the tooth root before removal, or it can be completely removed. Step 6: Clean the alveolar socket, reposition and suture.

[0015] The beneficial effects of the minimally invasive root resection system of this invention: 1. Minimally invasive: Only two small incisions are needed, preserving the integrity of the bone to the greatest extent, resulting in mild postoperative reactions and rapid healing.

[0016] 2. Preservation of bone tissue: This avoids the need to remove large amounts of healthy alveolar bone to expose the middle of the tooth root, which is beneficial for the long-term stability of the tooth and the possibility of implant restoration later.

[0017] 3. Precise and safe operation: The oral CBCT machine combined with the 3D printer to print a double-hole positioning guide plate ensures a precise surgical path, which is especially suitable for areas close to important anatomical structures (such as the maxillary sinus and inferior alveolar nerve canal), greatly reducing surgical risks.

[0018] 4. High efficiency: It eliminates the step of painstakingly grinding away the entire intraosseous root in a narrow space, and the operation is more direct and faster through physical ejection.

[0019] 5. Reduced risk of root fracture: The whole-piece ejection method avoids the risk of instrument slippage or lateral root fracture during tooth root grinding. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall process of a minimally invasive root amputation system according to the present invention.

[0022] Figure 2 This is a schematic diagram of the dual-hole positioning guide plate structure of a minimally invasive root cutting system according to the present invention.

[0023] Figure 3 This is a schematic diagram of the alveolar structure of a minimally invasive root resection system according to the present invention.

[0024] Figure 4 This is a schematic diagram of the ejection device structure of a minimally invasive root cutting system according to the present invention.

[0025] The labels in the diagram represent: 1. Precision positioning device; 2. Double-hole positioning guide plate; 21. Dental brace; 22. Connecting rod; 23. Adhesive plate; 24. Upper positioning hole; 25. Lower positioning hole; 3. Alveolar bone; 31. Alveolar bone; 32. Upper hole; 33. Lower hole; 4. Opening device; 5. Crown-root separation device; 6. Ejection device; 61. Ejector; 62. Working end; 63. Vibration source. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1, referring to Figures 1 to 4 This is the first embodiment of the present invention. This embodiment provides a minimally invasive root resection system that can achieve minimally invasive resection of diseased tooth roots while preserving part of the alveolar bone. It includes a precision positioning device 1, an opening device 4, a crown-root separation device 5, and an ejection device 6. Specifically, the precision positioning device 1 includes an oral CBCT machine, a 3D printer connected to the oral CBCT machine, and a double-hole positioning guide plate 2 printed by the 3D printer; The double-hole positioning guide plate 2 includes a dental brace 21, a bonding plate 23 disposed on the side wall of the dental brace 21, an upper positioning hole 24 at the upper end of the bonding plate 23 and a lower positioning hole 25 at the lower end of the bonding plate 23. Furthermore, the double-hole positioning guide plate 2 includes a dental sleeve 21, and a bonding plate 23 is fixedly connected to the side wall of the dental sleeve 21. An upper positioning hole 24 is provided at the upper end of the bonding plate 23, and a lower positioning hole 25 is provided on the bonding plate 23 below the upper positioning hole 24. The upper positioning hole 24 is a downward-sloping groove with one end near the tooth root located at the lower end; Specifically, the end of the brace 21 is connected to the alveolar bone 3; The double-hole positioning guide plate 2 also includes a connecting rod 22, and the end of the dental sleeve 21 is provided with the connecting rod 22; Furthermore, the end of the brace 21 is fitted with an alveolar 3, and an alveolar 3 is opened at the end of the brace 21 near the alveolar 3, and the teeth on the alveolar 3 are engaged in the alveolar 3. The double-hole positioning guide plate 2 also includes a connecting rod 22. The end of the dental sleeve 21 away from the alveolar 3 is fixedly connected to the dental sleeve 21, and the dental sleeve 21 is located between the two ends of the dental sleeve 21. Specifically, the alveolar bone 3 includes alveolar bone 31, the end of the dental crown 21 is provided with alveolar bone 31, an upper hole 32 is opened on the alveolar bone 31 inside the upper positioning hole 24, and a lower hole 33 is opened on the alveolar bone 31 inside the lower positioning hole 25. Furthermore, the alveolar bone 3 includes alveolar bone 31, the end of the dental crown 21 is fitted with alveolar bone 31, and the upper hole 32 is a downward-sloping groove with the end near the root located at the lower end. It should be added that the end of the alveolar bone 31 is fixedly connected to a tooth, which is snapped into the alveolar bone at the end of the dental crown 21. The upper hole 32 is located slightly above the root bifurcation and is used for subsequent grinding of the connection between the crown and the root. Lower hole 33 is located approximately 2-3 mm above the apical region of the target tooth root, serving as the entry point for ejecting the instrument. Specifically, the ejection device 6 includes an ejector 61, one end of which is provided with a working end 62, and the other end of the ejector 61 is provided with a working end 62. The lower end of the ejector 61 is U-shaped and has a depth mark at the end. Furthermore, the ejection device 6 includes an ejector 61, the lower end of which is U-shaped and a working end 62 is fixedly connected to the end. The other end of the ejector 61 is fixedly connected to a vibration source 63, and a depth mark is provided on the ejector 61 below the working end 62. Vibration source 63 can be a percussion hammer or an ultrasonic bone scalpel; The working end 62 has blunt round, wedge-shaped and concave surfaces, etc.; When in use, the oral CBCT machine is started to scan and analyze the alveolar bone 31. Then the oral CBCT machine transmits the data to the 3D printer, and the 3D printer prints out the double-hole positioning guide plate 2. The dental crown 21 is fitted onto the patient's alveolar bone 31. Under the limitation of the connecting rod 22, the dental crown 21 will not undergo significant deformation when it is put on the patient's alveolar bone 31, thus ensuring accurate positioning. At this time, the clasp 23 is attached to the outer wall of the alveolar bone 31 on the outer side of the patient's diseased tooth root. Guided by the upper positioning hole 24 and the lower positioning hole 25, the drilling device passes through the bone cortex and drills the upper hole 32 and the lower hole 33 on the alveolar bone 31. Then, the crown root separation device 5 is activated, and the crown root separation device 5 separates the diseased tooth root from the crown through the upper hole 32. Then, the working end 62 passes through the lower hole 33 and abuts against the diseased tooth root. Then, the vibration source 63 is activated. The vibration source 63 vibrates the diseased tooth root slightly through the working end 62. Then, the working end 62 squeezes the diseased tooth root upward. The diseased tooth root moves upward and is taken out through the upper hole 32. The diseased tooth root was successfully removed. Because holes were made in the alveolar bone 31 at both ends of the diseased tooth root, the diseased tooth root was removed by operating through the two small holes. This prevented the alveolar bone between the two small holes from being discarded, thus preserving the integrity of the alveolar bone to the greatest extent. As a result, the sutured gingiva did not sink due to the lack of alveolar bone support, and the patient healed faster after the operation.

[0030] Example 2, refer to Figures 1 to 4 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a surgical method for a minimally invasive root resection system, which includes the following steps: Step 1: Obtain three-dimensional data of alveolar bone 31 and tooth root using an oral CBCT machine to determine the root resection plan and the precise three-dimensional position, angle and depth of the upper hole 32 and lower hole 33; Step 2: Based on the planning data from Step 1, fabricate the double-hole positioning guide plate 2 using a 3D printer; Step 3: Try on the double-hole positioning guide 2 in the inlet and calibrate it. Then, through the upper positioning hole 24, use the drilling device to make an upper hole 32 in the bone cortex to expose the end of the tooth root near the crown. Through the lower positioning hole 25, make a lower hole 33 in the apical region of the target tooth root. Step 4: Using a crown-root separation device, precisely grind away the connection between the crown and the target root at the root bifurcation through the upper hole 32, so that the root and crown are completely separated. Step 5: Insert the working end 62 into the alveolar bone 31 through the lower hole 33, so that the working end 62 abuts against the middle and lower root surface of the target tooth root. Then, use the vibration source 63 to apply a gentle vibration force to the ejector 61 and the working end 62. At this time, the working end 62 will transmit an upward force to the tooth root. The working end 62 will drive the tooth root to move towards the upper hole 32. Since the tooth root and crown have been separated and are subjected to an upward thrust, the entire tooth root will be pushed upward completely and finally removed through the upper hole 32 or the gingival gap. If the tooth root is stuck in the upper hole and difficult to remove, the opening device can be further used to insert into the upper hole to further shorten the tooth root before removal, or completely remove it. This process only removes the target tooth root and hardly increases the damage to the bone. Step Six: Clean the alveolar socket, reposition and suture; The beneficial effects of this invention are: Minimally invasive: Only two small incisions are needed, preserving the integrity of the bone to the greatest extent, resulting in mild postoperative reactions and rapid healing.

[0031] Preserving bone tissue: This avoids the need to remove large amounts of healthy alveolar bone to expose the mid-root, which is beneficial for the long-term stability of the tooth and the possibility of implant restoration later.

[0032] Precise and safe operation: The oral CBCT machine combined with the 3D printer to print the double-hole positioning guide plate 2 provides a precise surgical path, which is especially suitable for areas close to important anatomical structures (such as the maxillary sinus, inferior alveolar nerve canal, etc.), greatly reducing surgical risks.

[0033] High efficiency: It eliminates the step of painstakingly grinding away the entire intraosseous root in a narrow space, and the operation is more direct and faster through physical ejection.

[0034] Reduced risk of root fracture: The whole-piece ejection method avoids the risk of instrument slippage or lateral root fracture during tooth root grinding.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A minimally invasive root resection system, characterized in that: Including a precise positioning device (1); The precision positioning device (1) includes an oral CBCT machine, a 3D printer connected to the oral CBCT machine, and a double-hole positioning guide plate (2) printed by the 3D printer; wherein, The double-hole positioning guide plate (2) includes a dental brace (21), a fitting plate (23) disposed on the side wall of the dental brace (21), an upper positioning hole (24) at the upper end of the fitting plate (23), and a lower positioning hole (25) at the lower end of the fitting plate (23); and, The end of the dental brace (21) is connected to the alveolar bone (3).

2. The minimally invasive root resection system according to claim 1, characterized in that: The double-hole positioning guide plate (2) also includes a connecting rod (22), and the end of the dental brace (21) is provided with a connecting rod (22).

3. The minimally invasive root resection system according to claim 2, characterized in that: The alveolar bone (3) includes alveolar bone (31), and the end of the dental crown (21) is provided with alveolar bone (31). An upper hole (32) is provided on the alveolar bone (31) inside the upper positioning hole (24), and a lower hole (33) is provided on the alveolar bone (31) inside the lower positioning hole (25).

4. The minimally invasive root resection system according to claim 3, characterized in that: It also includes a hole-opening device (4).

5. The minimally invasive root resection system according to claim 4, characterized in that: It also includes a crown root separation device (5).

6. The minimally invasive root resection system according to claim 5, characterized in that: It also includes an ejector device (6).

7. The minimally invasive root resection system according to claim 6, characterized in that: The ejection device (6) includes an ejector (61), one end of which is provided with a working end (62), and the other end of which is provided with a working end (62). The lower end of the ejector (61) is U-shaped and has a depth mark.

8. A surgical method, characterized in that: Includes the minimally invasive root resection system as described in any one of claims 1 to 7, and the following steps: Step 1: Obtain three-dimensional data of alveolar bone (31) and tooth root using an oral CBCT machine to determine the root resection plan and the precise three-dimensional position, angle and depth of the upper hole (32) and lower hole (33); Step 2: Based on the planning data from Step 1, a double-hole positioning guide plate (2) is fabricated using a 3D printer. Step 3: Try on the double-hole positioning guide (2) in the inlet and check it. Then, through the upper positioning hole (24), use the hole-opening device (4) to open the upper hole (32) on the bone cortex to expose the end of the tooth root near the crown. Through the lower positioning hole (25), open the lower hole (33) in the apical region of the target tooth root. Step 4: Through the upper hole (32), use the crown-root separation device to precisely grind away the connection between the crown and the target root at the root bifurcation, so that the root and crown are completely separated; Step 5: Insert the working end (62) into the alveolar bone (31) through the lower hole (33) and make the working end (62) abut against the middle and lower root surface of the target tooth root. Then, use the vibration source (63) to apply a gentle vibration force to the ejector (61) and the working end (62). At this time, the working end (62) will transmit the upward force to the tooth root. The working end (62) will drive the tooth root to move towards the upper hole (32). Since the tooth root and crown have been separated and are subjected to the upward thrust, the entire tooth root will be pushed upward completely and finally removed through the upper hole (32) or the gingival gap. If the tooth root is stuck in the upper hole (32) and difficult to remove, the opening device (4) can be further inserted into the upper hole (32) to further shorten the tooth root before removal, or completely remove it. Step 6: Clean the alveolar socket, reposition and suture.

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