Positioning device for assisting in positioning nidus in jaw bone

Abstract

The positioning device comprises a reference tray and a positioning needle, the positioning needle is movably arranged in a movable groove in the reference tray through a sliding assembly, and the movable groove comprises an arc sliding groove in the middle and passing grooves located in the upper end and the lower end of the arc sliding groove so that the positioning needle can pass through. The sliding assembly comprises a sliding block arranged in the arc sliding groove in a sliding mode and a fixing arm arranged at one end of the sliding block, a through hole is formed in the fixing arm, and the positioning needle penetrates through the through hole. The standard tray provides a space positioning reference standard, the sliding assembly is matched with the movable groove, angle and length adjustment is provided for the positioning needle, then a doctor is assisted in evaluating and positioning the position of a focus in the jaw bone in the operation, and the accuracy of positioning in the operation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oral instruments, and in particular to a positioning device for assisting in positioning a lesion in the jaw. Background Art

[0002] Intramandibular lesions are abnormal conditions involving the jawbone and may be caused by a variety of reasons, including tumors, cysts, osteomyelitis, wisdom teeth, etc.

[0003] Impacted mandibular third molars (M3) are one of the most common wisdom teeth. Embedded in the bone, they account for approximately 20–30% of wisdom teeth and often lead to oral problems such as malocclusion, adjacent tooth root resorption, periodontitis, cysts, or tumors. Their deep impaction depth and proximity to critical structures (such as adjacent tooth roots, the inferior alveolar nerve, and the lingual nerve) make their clinical management quite challenging. Low-positioned, mesially tilted, and horizontal impactions are particularly common. Due to their complex spatial relationships with adjacent teeth (M2) and the inferior alveolar nerve canal, surgical complications such as adjacent tooth damage, nerve injury, and bone wall collapse are likely to occur. Controlling extraction trauma to manage postoperative complications is also crucial, and accurate crown positioning is particularly critical in clinical practice.

[0004] Current localization of mandibular lesions relies on preoperative CBCT imaging, and during surgery, the physician makes subjective judgments based on these images and their own experience. For example, in the case of impacted mandibular third molars (M3), even with simulation and clinical training, inexperienced physicians still struggle to intuitively locate the molar crown, leading to increased trauma and increased risk of complications. The lack of a quantifiable, visual, and standardized auxiliary tool creates a significant learning curve and the risk of positioning errors, especially for young physicians. Summary of the Invention

[0005] In response to the above-mentioned problems in the prior art, the present invention provides a positioning device for assisting in positioning intramandibular lesions, which solves the problem of errors in positioning intramandibular lesions during surgery by existing physicians.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A positioning device for assisting in locating intramandibular lesions is provided, which includes a reference tray and a positioning needle. The positioning needle is movably arranged in a movable groove on the reference tray through a sliding component. The movable groove includes an arc groove in the middle and through grooves at the upper and lower ends of the arc groove for the positioning needle to pass through. The sliding component includes a slider slidably arranged in the arc groove and a fixed arm arranged at one end of the slider. A through hole is opened on the fixed arm, and the positioning needle is inserted into the through hole.

[0007] The present invention provides a spatial positioning reference through a reference tray, and provides angle and length adjustment for the positioning needle through the cooperation of a sliding component and a movable groove, thereby assisting the physician in evaluating and locating the position of the mandibular lesion during surgery, thereby improving the accuracy of intraoperative positioning.

[0008] Furthermore, first scales are respectively provided on the reference trays located on both sides of the movable slot.

[0009] Furthermore, a second scale is provided on the slider.

[0010] Furthermore, the positioning pin includes a sliding rod slidably arranged in the through hole, and positioning heads arranged at both ends of the sliding rod.

[0011] Furthermore, the positioning head is spherical or conical.

[0012] Furthermore, the positioning head is made of stainless steel.

[0013] Furthermore, a third scale is provided on the sliding rod.

[0014] The present invention discloses a positioning device for assisting in positioning a lesion in the jaw, which has the following beneficial effects: 1. The present invention provides a spatial positioning reference through a reference tray, and provides angle and length adjustment for the positioning needle through the cooperation of the sliding component and the movable groove, thereby assisting the physician in evaluating and locating the position of the lesion in the mandible during surgery, thereby improving the accuracy of intraoperative positioning.

[0015] 2. The first scale on the reference tray of the present invention and the positioning head on the positioning needle are both bidirectionally set, which can be applied to the mandibular lesions on the left and right sides of the oral cavity, increasing the flexibility of clinical application and adapting to the needs of different cases. It can be used for mandibular lesions in both the maxillary and mandibular areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a positioning device for assisting in locating intramandibular lesions according to the present invention.

[0017] Figure 2 It is a structural schematic diagram of the movable groove and positioning pin of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the reference tray of the present invention.

[0019] Figure 4 This is a structural schematic diagram of the reference tray of the present invention from another angle.

[0020] Among them, 1. Reference tray; 11. First scale; 2. Positioning pin; 21. Sliding rod; 22. Positioning head; 23. Third scale; 3. Sliding assembly; 31. Slider; 32. Fixed arm; 33. Through hole; 34. Second scale; 4. Movable slot; 41. Arc slot; 42. Through slot; 5. Fourth scale. DETAILED DESCRIPTION The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0021] Example 1 refer to Figure 1-Figure 4 This embodiment provides a positioning device for assisting in locating intramandibular lesions, the purpose of which is to solve the problem of errors in the positioning of intramandibular lesions by existing physicians during surgery. The specific structure of this embodiment will be described in detail below.

[0022] A positioning device for assisting in positioning a lesion in the jaw comprises a reference tray 1 and a positioning needle 2.

[0023] The positioning pin 2 is movably arranged in the movable groove 4 on the reference tray 1 through the sliding component 3; the movable groove 4 includes an arc groove 41 in the middle, and passing grooves 42 located at the upper and lower ends of the arc groove 41 for the positioning pin 2 to pass through.

[0024] Specifically, the sliding assembly 3 includes a slider 31 slidably arranged in the arc groove 41 , and a fixed arm 32 arranged at one end of the slider 31 . A through hole 33 is formed in the fixed arm 32 , and the positioning pin 2 is inserted into the through hole 33 .

[0025] In this embodiment, the reference tray 1 can be fitted and installed on the distal or lingual adjacent surface of the mandibular second molar to provide a spatial positioning reference reference. The positioning pin 2 is inserted into the through hole 33 on the fixed arm 32, and the slider 31 moves or rotates in the arc groove 41, driving the fixed arm 32, and then driving the positioning pin 2 to adjust the angle or position of the positioning pin 2. The positioning pin 2 can slide up and down in the through hole 33, so that the end of the positioning pin 2 fits the gingival surface, thereby determining the spatial position of the molar crown, assisting the physician in evaluating and locating the position of the mandibular third molar during surgery, and further assisting the physician in evaluating and locating the position of the lesion in the jaw during surgery, thereby improving the accuracy of intraoperative positioning.

[0026] Optionally, by making the relative inner walls of the groove 42 relatively inclined, an oblique groove design is adopted, which not only facilitates smoother operation but also facilitates cleaning and avoids accumulation of dirt and residues, thereby effectively reducing the risk of infection and ensuring hygiene.

[0027] Optionally, a fourth scale 5 is provided on the side wall of the reference tray 1 and a scale mark is provided on the end face of the fixed arm 32. The fourth scale 5 is an angle scale, so that the deflection angle of the positioning pin 2 can be determined by the cooperation between the fourth scale 5 and the scale mark.

[0028] Specifically, the first scales 11 are respectively provided on the reference trays 1 located on both sides of the movable slot 4. The second scale 34 is provided on the slider 31.

[0029] In this embodiment, the relative position of the slider 31 with respect to the reference tray 1 is determined by the cooperation between the first scale 11 and the second scale 34 , wherein the fixed arm 32 and the slider 31 can be set to a fixed length according to actual needs.

[0030] Optionally, the first scale 11 and the second scale 34 have a line spacing of 1 mm and a depth / width of 0.1 mm.

[0031] Specifically, the positioning pin 2 includes a sliding rod 21 that slides within the through hole 33 and positioning heads 22 disposed at both ends of the sliding rod 21. The positioning heads 22 are spherical or conical and made of stainless steel. A third scale 23 is provided on the sliding rod 21.

[0032] In this embodiment, the size of the positioning head 22 is larger than the diameter of the through hole 33, and the sliding rod 21 can slide up and down in the through hole 33 so that the end of the positioning head 22 fits the gum surface, and then the third scale 23 is provided on the sliding rod 21 to determine the spatial position of the molar crown, thereby assisting the physician in preoperatively evaluating and positioning the position of the mandibular third molar before surgery, thereby improving the accuracy of preoperative positioning.

[0033] Alternatively, the positioning head 22 is a flat cone. The positioning head 22 of stainless steel is convenient for sterilization.

[0034] The working principle of the positioning device for assisting in locating intramandibular lesions in this solution is as follows: In practical applications, the present invention first analyzes the three-dimensional positional relationship between M3, M2, and the neural canal through CBCT images, and determines the position of the mandibular lesion before surgery based on the CBCT images.

[0035] Next, the reference tray 1 can be fitted and installed on the distal proximal surface of the mandibular second molar, and the slider 31 is moved or rotated in the arc groove 41 according to the CBCT image, driving the fixed arm 32, and then driving the positioning pin 2, and adjusting the positioning pin 2 to the estimated position of the crown top, and sliding the sliding rod 21 up and down in the through hole 33 so that the end of the positioning head 22 is fitted on the gingival surface, and the spatial position of the molar crown is determined in conjunction with the third scale 23, thereby determining the spatial position of the molar crown, and assisting the physician in evaluating and locating the position of the mandibular third molar during the operation, and then assisting the physician in evaluating and locating the position of the lesion in the jaw during the operation, thereby improving the accuracy of intraoperative positioning.

[0036] Although the specific embodiments of the invention are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A positioning device for assisting in locating a lesion in the jaw, characterized by: It comprises a reference tray (1) and a positioning pin (2), wherein the positioning pin (2) is movably arranged in a movable groove (4) on the reference tray (1) via a sliding component (3); The movable groove (4) includes a circular arc sliding groove (41) in the middle, and passing grooves (42) located at the upper and lower ends of the circular arc sliding groove (41) for the positioning needle (2) to pass through; The sliding assembly (3) comprises a slider (31) slidably arranged in the circular arc sliding groove (41), and a fixed arm (32) arranged at one end of the slider (31), wherein a through hole (33) is formed in the fixed arm (32), and the positioning pin (2) is inserted into the through hole (33).

2. The positioning device for assisting in positioning a lesion in the jaw according to claim 1, characterized in that: The reference trays (1) located on both sides of the movable slot (4) are respectively provided with first scales (11).

3. The positioning device for assisting in positioning a lesion in the jaw according to claim 1, characterized in that: The slider (31) is provided with a second scale (34).

4. The positioning device for assisting in positioning a lesion in the jaw according to claim 1, characterized in that: The positioning needle (2) comprises a sliding rod (21) slidably arranged in the through hole (33), and positioning heads (22) arranged at both ends of the sliding rod (21).

5. The positioning device for assisting in positioning a lesion in the jaw according to claim 4, characterized in that: The positioning head (22) is spherical or conical.

6. The positioning device for assisting in positioning a lesion in the jaw according to claim 4, characterized in that: The positioning head (22) is made of stainless steel.

7. The positioning device for assisting in positioning a lesion in the jaw according to claim 6, characterized in that: The sliding rod (21) is provided with a third scale (23).

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