Jaw position relation positioning device

Abstract

The utility model discloses a jaw position relation positioning device, relates to the field of false tooth manufacturing auxiliary tools, and can solve the problem that the jaw position relation of a patient is difficult to accurately judge due to the fact that a wax rim adopted in the prior art is easy to deflect in the horizontal direction in the jaw position relation measuring process. The jaw position relation positioning device comprises an upper jaw temporary base used for being located on the upper jaw of a patient and a lower jaw temporary base used for being located on the lower jaw of the patient, the upper jaw temporary base is connected with a wax rim and a tracing plate located on the inner side of the wax rim, and the lower jaw temporary base is connected with a tracing needle. A needle head of the tracing needle faces the tracing plate, and a marking layer matched with the needle head of the tracing needle is arranged on the side, close to the tracing needle, of the tracing plate, so that the needle head of the tracing needle carves a jaw position trajectory on the marking layer along with relative movement of the upper jaw temporary base and the lower jaw temporary base.

Description

Technical Field

[0001] This application relates to the field of auxiliary tools for denture fabrication, and particularly to a jaw relation positioning device. Background Art

[0002] The fabrication of dentures is a crucial step in oral rehabilitation, aiming to restore the patient's chewing function and aesthetics. During the denture fabrication process, determining the patient's jaw relation is of utmost importance as it determines the functionality and comfort of the dentures. The wax rim plays an important role in this process. By simulating the patient's gums and teeth, it helps the doctor record and adjust the occlusal relationship between the upper and lower jaws. By having the patient bite on the wax rim, the doctor can obtain the contact points and occlusal trajectories of the upper and lower jaws, thereby accurately determining the jaw relation and providing a reliable basis for the further fabrication of the dentures.

[0003] In the prior art, dental special wax is usually used to fabricate the wax rim after heating, distribute it to form the simulated shapes of the upper and lower teeth, and connect it to the upper and lower provisional bases. The doctor will wear the fabricated upper and lower wax rims into the patient's oral cavity, let the patient bite, and adjust the wax rim according to the patient's jaw relation. However, when the upper and lower wax rims come into occlusal contact, since the contact points of the wax rim (the occlusal surfaces of the whole row of teeth) are numerous and relatively soft, the wax rim is likely to cause the patient to have a horizontal deviation during occlusion. In this way, it is difficult for the doctor to accurately judge the mandibular centric position of the patient. The numerous contact points and the softness of the wax material make the occlusal imprint unclear, increasing the difficulty of judgment, and thus affecting the final fabrication quality of the dentures and the patient's usage comfort. Utility Model Content

[0004] Therefore, this application provides a jaw relation positioning device to solve the problem that the wax rim used in the prior art is prone to horizontal deviation during the determination of the jaw relation, resulting in difficulty in accurately judging the patient's jaw relation.

[0005] To achieve the above object, this application provides the following technical solutions:

[0006] A jaw relation positioning device includes an upper provisional base for positioning on the patient's upper jaw and a lower provisional base for positioning on the patient's lower jaw. The upper provisional base is connected with a wax rim, and the upper provisional base is connected with a tracing board located inside the wax rim. The lower provisional base is connected with a tracing needle, the tip of the tracing needle faces the tracing board, and a marking layer for cooperating with the tip of the tracing needle is arranged on one side of the tracing board close to the tracing needle, so that the tip of the tracing needle draws a jaw locus line on the marking layer as the upper provisional base and the lower provisional base move relative to each other.

[0007] Optionally, the tracing board is detachably connected to the maxillary provisional base, the mandibular provisional base is detachably connected with a fixing plate, a thread is formed on the outer peripheral wall of the tracing needle, and the fixing plate is provided with a threaded hole threadedly connected with the tracing needle.

[0008] Optionally, a limiting screw is further threadedly connected to the outer wall of the tracing needle. The limiting screw is located between the tracing board and the fixing plate. The diameter of the limiting screw is larger than that of the threaded hole, and an anti-slip thread is arranged on the outer peripheral wall of the limiting screw along its circumferential direction.

[0009] Optionally, the tracing needle includes a threaded section for being threadedly connected to the threaded hole and a needle head integrally formed at one end of the threaded section. There is a transition section between the needle head and the threaded section, and the diameter of the transition section gradually decreases from the threaded section to the needle head.

[0010] Optionally, the marking layer is a pigment coating provided on the tracing board.

[0011] Optionally, the fixing plate is provided with a reference member which has a reference surface. When the reference member abuts against the fixing plate, the reference surface is perpendicular to the fixing plate, so that a doctor can observe the relative angle and relative size between the reference surface and the tracing needle.

[0012] Optionally, the reference member is a metal ring, and the outer peripheral side surface of the metal ring is the reference surface.

[0013] Compared with the prior art, the present application has at least the following beneficial effects:

[0014] The maxillary provisional base and the mandibular provisional base are respectively worn on the maxilla and mandible of a patient. Then, under the guidance of a doctor, the upper and lower jaws of the patient are closed so that the needle head of the tracing needle abuts against the tracing board. The patient sequentially performs the following three actions: First, the mandible retracts to the centric relation; then, it moves to the left; finally, after returning to the centric relation, it moves to the right. Through these three actions, the needle head of the tracing needle draws three jaw position trace lines on the marking layer of the tracing board. The intersection position of these trace lines is the centric position. The doctor can accurately determine the jaw position relationship (horizontal jaw position relationship) of the patient according to these three jaw position trace lines and their intersection position. Through the cooperation of the tracing needle and the tracing board, the present application replaces the traditional wax rim method, reduces the contact points, and avoids the horizontal deviation caused by the wax rim due to many contact points, thereby more accurately determining the jaw position relationship. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings generally should not be regarded as limiting conditions when implementing the present application; for example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / deletion / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. based on the technical concepts disclosed in the present application and the exemplary drawings.

[0016] Figure 1 Structural schematic diagram of a jaw relation positioning device provided by an embodiment of the present application;

[0017] Figure 2 For Figure 1 Another perspective view;

[0018] Figure 3 Structural schematic diagram of the unfolded state of a jaw relation positioning device provided by an embodiment of the present application;

[0019] Figure 4 Schematic diagram of the upper jaw locus line on the tracing board of a jaw relation positioning device provided by an embodiment of the present application;

[0020] Figure 5 Structural schematic diagram of the lower jaw temporary base, fixing plate, tracing needle and reference member of a jaw relation positioning device provided by an embodiment of the present application;

[0021] Figure 6 Top view structural schematic diagram of the lower jaw temporary base of a jaw relation positioning device provided by an embodiment of the present application;

[0022] Figure 7 Cooperation schematic diagram of the tracing board, fixing plate, tracing needle and limit screw of a jaw relation positioning device provided by an embodiment of the present application;

[0023] Figure 8 Cooperation schematic diagram of the tracing needle of a jaw relation positioning device provided by an embodiment of the present application;

[0024] Figure 9 Structural schematic diagram of the lower jaw temporary base, fixing plate and tracing needle of a jaw relation positioning device provided by another embodiment of the present application.

[0025] Explanation of reference numerals:

[0026] 1. Maxillary provisional base; 11. Wax rim; 12. Recording board; 121. Marking layer; 122. Jaw movement trajectory line; 2. Mandibular provisional base; 21. Fixing plate; 22. Recording needle; 221. Threaded section; 222. Transition section; 223. Needle tip; 23. Limit screw; 24. Reference piece; 241. Reference surface. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] In the description of the present application: Unless otherwise specified, the meaning of "a plurality" is two or more. Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0029] Reference Figure 1-4 Referring to

[0030] , the present application discloses a jaw relation positioning device, which includes a maxillary provisional base 1 for being placed on the patient's maxilla and a mandibular provisional base 2 for being placed on the patient's mandible. The maxillary provisional base 1 is connected with a wax rim 11, and the maxillary provisional base 1 is connected with a recording board 12 located inside the wax rim 11. The mandibular provisional base 2 is connected with a recording needle 22, the needle tip 223 of the recording needle 22 faces the recording board 12, and a marking layer 121 for cooperating with the needle tip 223 of the recording needle 22 is arranged on one side of the recording board 12 close to the recording needle 22, so that the needle tip 223 of the recording needle 22 draws a jaw movement trajectory line 122 on the marking layer 121 as the maxillary provisional base 1 and the mandibular provisional base 2 move relative to each other.

[0031] In addition, a wax rim 11 is connected to the maxillary provisional base 1 in this application. The wax rim 11 is used to simulate the shape of the upper lip and the facial fullness to ensure that the facial contour is natural and beautiful after the patient wears the denture. The mandibular provisional base 2 may not need to be provided with a wax rim 11 because the position of the mandibular provisional base 2 can be accurately determined according to the wax rim 11 of the maxillary provisional base 1 and the three jaw position trace lines 122 traced by the tracing pin 22 on the tracing board 12.

[0032] It should also be noted that in clinical applications, the height relationship between the upper and lower jaws is relatively easy to determine, while the horizontal relationship between the upper and lower jaws is an important factor determining the accuracy of occlusion. This application effectively solves the horizontal deviation problem in traditional methods by reducing the contact points and using the marking layer 121 to record the precise movement trajectory, improves the determination accuracy of the jaw relationship, and thus improves the quality of denture fabrication and the patient's comfort in use.

[0033] The tracing board 12 is detachably connected to the maxillary provisional base 1, the mandibular provisional base 2 is detachably connected with a fixing plate 21, a thread is formed on the outer peripheral wall of the tracing pin 22, and the fixing plate 21 is provided with a threaded hole threadedly connected with the tracing pin 22.

[0034] After the doctor measures the heights of the upper and lower jaws, by rotating the tracing pin 22 to make the thread of the tracing pin 22 cooperate with the threaded hole of the fixing plate 21, the height of the tracing pin 22 extending out of the fixing plate 21 can be adjusted, and further the distance between the needle tip 223 of the tracing pin 22 and the tracing board 12 can be adjusted so that the needle tip 223 of the tracing pin 22 abuts against the tracing board 12. In this way, the height of the tracing pin 22 is adjusted by the thread to ensure that it accurately contacts the tracing board 12, enabling the tracing pin 22 to adapt to the oral cavities of different patients, thereby ensuring the accuracy of recording the jaw position trace lines 122.

[0035] In some embodiments, for some patients with very few or no mandibular teeth, the fixing plate 21 can be directly connected to the top surface of the mandibular provisional base 2. In this case, a larger-sized fixing plate 21 can be selected, for reference Figure 9 ; for some patients with more mandibular teeth, the fixing plate 21 can be connected to the inner side surface of the mandibular provisional base 2. Correspondingly, the size of the fixing plate 21 is much smaller.

[0036] In some embodiments, the tracing board 12 and the fixing plate 21 are fixed by a connecting material such as wax glue. In this way, according to the specific oral conditions of the patient, the relative postures between the tracing board 12 and the maxillary provisional base 1, and between the fixing plate 21 and the mandibular provisional base 2 can be adjusted by the wax glue. Specifically, the angles and positions of the tracing board 12 and the fixing plate 21 can be adjusted by setting different numbers and shapes of wax glue.

[0037] Reference Figure 5-8, in some embodiments, a limiting screw 23 is also threadedly connected to the outer wall of the tracing needle 22. The limiting screw 23 is located between the tracing plate 12 and the fixing plate 21. The diameter of the limiting screw 23 is larger than the threaded hole, and an anti-slip thread is provided on the outer peripheral wall of the limiting screw 23 along its circumferential direction. The limiting screw 23 can increase the threaded connection length of the tracing needle 22 and enhance the stability of the overall connection. The limiting screw 23 is located between the tracing plate 12 and the fixing plate 21. Through the design of the anti-slip thread, it is convenient for the human hand to rotate. The limiting screw 23 can be rotated to press against the surface of the fixing plate 21, thereby increasing the connection stability of the tracing needle 22. When adjusting the height of the tracing needle 22, first rotate the limiting screw 23 to disengage it from the surface of the fixing plate 21, then rotate the tracing needle 22 to adjust the distance between its needle tip 223 and the tracing plate 12, ensure that the needle tip 223 of the tracing needle 22 accurately abuts against the tracing plate 12, and then rotate the limiting screw 23 to press it against the surface of the fixing plate 21. The limiting screw 23 ensures that the tracing needle 22 will not loosen accidentally during the adjustment process and can be accurately positioned, thus ensuring the height adjustment accuracy and stability of the tracing needle 22.

[0038] The tracing needle 22 includes a threaded section 221 for threaded connection to the threaded hole and a needle tip 223 integrally formed at one end of the threaded section 221. There is a transition section 222 between the needle tip 223 and the threaded section 221, and the diameter of the transition section 222 gradually decreases from the threaded section 221 to the needle tip 223. The transition section 222 is located between the needle tip 223 and the threaded section 221, and its diameter gradually decreases from the threaded section 221 to the needle tip 223, increasing the connection stability between the needle tip 223 and the threaded section 221.

[0039] The marking layer 121 is a pigment coating provided on the tracing plate 12.

[0040] The marking layer 121 is a pigment coating provided on the tracing plate 12. When the tracing needle 22 moves on the marking layer 121, a clear track will be left on the marking layer 121. This design can visually display the movement track of the patient's mandible, thereby helping the doctor accurately determine the jaw relationship. The pigment coating has a high color contrast, making the track left by the tracing needle 22 clearly visible for the doctor to observe and analyze.

[0041] In some embodiments, the marking layer 121 can also be a coating made of erasable material. The advantage of the erasable material lies in its ability to be used multiple times. The doctor can erase the previous track after each use and record a new track.

[0042] In some embodiments, the fixing plate 21 is provided with a reference member 24. The reference member 24 has a reference surface 241. When the reference member 24 abuts against the fixing plate 21, the reference surface 241 is perpendicular to the fixing plate 21, so that the doctor can observe the relative angle and relative size between the reference surface 241 and the tracing needle 22.

[0043] After the doctor adjusts the recording needle 22, the reference member 24 can be abutted against the fixed plate 21. At this time, the reference surface 241 of the reference member 24 is perpendicular to the fixed plate 21. By moving the reference member 24, the reference surface 241 of the reference surface 241 is brought close to the recording needle 22, so that the relative angle between the reference surface 241 and the recording needle 22 can be clearly compared. Under normal circumstances, the reference surface 241 should be parallel to the recording needle 22, which can ensure that the recording needle 22 records at the correct position. The height of the reference surface 241 is a fixed height. By comparing the height of the reference surface 241 and the recording needle 22, it can be judged whether the height of the rotational adjustment of the recording needle 22 is accurate. This design enables the doctor to have an intuitive reference standard when adjusting the height of the recording needle 22, thereby improving the accuracy and efficiency of the adjustment.

[0044] In some embodiments, the reference surface 241 can be provided with size scales to more accurately measure the height of the adjustment of the recording needle 22.

[0045] The reference member 24 is a metal ring, and the outer peripheral side surface of the metal ring is the reference surface 241. The metal ring can be sleeved outside the recording needle 22, that is, the recording needle 22 and its limit screw 23 are located inside the inner circle of the metal ring.

[0046] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.

[0047] In the above text, the present application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the present application, several conventional adjustments or further innovations can also be made to these specific embodiments; but as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A jaw relation positioning device, characterized in that, It includes a maxillary provisional base for placement on the patient's maxilla and a mandibular provisional base for placement on the patient's mandible. The maxillary provisional base is connected with a wax rim, and a tracing board located inside the wax rim is connected to the maxillary provisional base. A tracing pin is connected to the mandibular provisional base, and the tip of the tracing pin faces the tracing board. A marking layer for mating with the tip of the tracing pin is provided on a side of the tracing board close to the tracing pin, so that the tip of the tracing pin draws a jaw position trace line on the marking layer as the maxillary provisional base and the mandibular provisional base move relative to each other.

2. The jaw relation positioning device according to claim 1, characterized in that, The tracing board is detachably connected to the maxillary provisional base. A fixing plate is detachably connected to the mandibular provisional base. A thread is formed on the outer peripheral wall of the tracing pin, and a threaded hole for threaded connection with the tracing pin is provided in the fixing plate.

3. The jaw relation positioning device according to claim 2, wherein A limiting screw is also threadedly connected to the outer wall of the tracing pin. The limiting screw is located between the tracing board and the fixing plate. The diameter of the limiting screw is larger than that of the threaded hole, and an anti-slip thread is provided on the outer peripheral wall of the limiting screw along its circumferential direction.

4. The jaw relation positioning device according to claim 2, wherein, The tracing pin includes a threaded section for threaded connection to the threaded hole and a tip integrally formed at one end of the threaded section. There is a transition section between the tip and the threaded section, and the diameter of the transition section gradually decreases from the threaded section to the tip.

5. The jaw relation positioning device according to claim 1, characterized in that, The marking layer is a pigment coating provided on the tracing board.

6. The jaw relation positioning device according to claim 2, characterized in that, The fixing plate is provided with a reference member which has a reference surface. When the reference member abuts against the fixing plate, the reference surface is perpendicular to the fixing plate, so that a doctor can observe the relative angle and relative size between the reference surface and the tracing pin.

7. The jaw relation positioning device according to claim 6, wherein The reference member is a metal ring, and the outer peripheral side surface of the metal ring is the reference surface.

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