Head fixing device for oral cavity CT and oral cavity CT comprising same

Abstract

The utility model provides a head fixing device for oral cavity CT and an oral cavity CT comprising the same, and belongs to the technical field of oral cavity CT. The head fixing device for oral cavity CT comprises a shell, a base, a threaded column and a head positioning assembly, a hollow channel is arranged in the middle of the shell, internal threads matched with threads of the threaded column are arranged on the inner side of the hollow channel, and the head positioning assembly is arranged on the base. The end of the threaded column is perpendicularly connected with the middle of the base, and head positioning assemblies are arranged on the two sides of the base respectively and comprise pull rods, outer insertion rods, inner insertion rods and positioning plugs used for positioning external auditory canals of a patient. The head can be kept stable by supporting the chin and limiting left-right twisting of the head, and it is effectively prevented that in the examination process, the head of a patient moves or the oral cavity CT shooting result is affected due to the fact that the head of the patient wears a special device.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral CT, and in particular relates to a head fixing device for oral CT and an oral CT comprising the device. Background Art

[0002] Oral CT provides great help to doctors in some oral diagnosis and preoperative guidance. Traditional oral CT takes a long time to shoot and is prone to shaking, which may cause artifacts, blurring and missing CT films. Therefore, a matching fixing device is needed to stabilize the head and ensure the smoothness of the examination process.

[0003] Currently, CBCT is a common way to examine the oral cavity. Existing CBCT mostly uses the method of placing the patient's chin on a fixed tray or bracket, and two plug rods are provided in front of the patient to connect the various components together. However, since it is often necessary to wear different devices on the head to take CBCT during oral diagnosis and treatment, the head cannot be fixed due to the obstruction of various accessories, and the fixing device is easy to show in the image, which cannot meet the actual needs and reduces the practicality of the device.

[0004] Therefore, a CBCT head stabilization device is needed to prevent the head from twisting left and right during shooting, which is not restricted by the patient wearing special devices, has a simple structure, and avoids the device from being visible in the image.

[0005] The above problems are issues that should be considered and resolved during the design and production process of the head fixation device for oral CT and the oral CT including the device. Utility Model Content

[0006] The utility model aims to provide a head fixing device for oral CT and an oral CT including the device to solve the problems in the prior art that the head is twisted left and right during oral CT shooting and the head is poorly fixed, which easily causes image artifacts.

[0007] The technical solution of the utility model is:

[0008] A head fixing device for oral CT comprises a shell and a base, a threaded column and a head positioning assembly, a hollow channel is provided in the middle of the shell, an internal thread matched with the thread of the threaded column is provided on the inner side of the hollow channel, an end of the threaded column is vertically connected to the middle of the base, head positioning assemblies are respectively provided on both sides of the base, the head positioning assembly comprises a pull rod, an external rod, an internal rod and a positioning plug for positioning the patient's external auditory canal, a slide groove is provided on the side of the base, one end of the pull rod is embedded in the slide groove, the other end of the pull rod is connected to the external rod, the external rod is provided with a top groove for the end of the internal rod to be embedded, and the other end of the internal rod is provided with a positioning plug.

[0009] Furthermore, a rubber pad is provided on the top of the shell.

[0010] Furthermore, the pull rod and the external insertion rod together form an L shape.

[0011] Furthermore, the head positioning assembly also includes a slider 1, a strip groove 1 connected to the slide groove is provided on the top of the base, and the slider 1 passes through the strip groove and is connected to the pull rod.

[0012] Furthermore, the head positioning assembly also includes a slider 2, a side portion of the outer rod is provided with a strip groove 2 connected to the top groove, and the slider 2 passes through the strip groove 2 and is connected to the inner rod.

[0013] Furthermore, the thread of the threaded column adopts equally divided third-order threads.

[0014] An oral CT comprises any one of the above-mentioned head fixing devices for oral CT.

[0015] The beneficial effects of the utility model are as follows: the head fixing device for oral CT and the oral CT including the device can keep the head stable and immobile by supporting the chin and limiting the left and right twisting of the head, effectively preventing the patient's head from moving during the examination or affecting the oral CT shooting results due to the special device worn on the patient's head. The device is not limited by the size of the head or various head-worn devices, can effectively fix the patient's head, and can adjust the head fixation height. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the head fixing device for oral CT according to an embodiment of the utility model;

[0017] Figure 2 is a schematic diagram of the structure of the housing, the base and the head positioning assembly in the embodiment;

[0018] Figure 3 is a schematic diagram of the structure of the housing in the embodiment, wherein (a) is a schematic diagram of the structure of the housing from top to bottom, and (a) is a schematic diagram of the structure of the housing from bottom to top;

[0019] Figure 4 is a schematic diagram of the lateral structure of the base, the threaded column and the head positioning assembly in the embodiment;

[0020] Wherein: 1-housing, 2-base, 3-threaded column, 4-head positioning assembly, 5-internal thread; 41-pull rod, 42-external plug, 43-internal plug, 44-positioning plug, 45-slider 1, 46-strip groove 1, 47-slider 2, 48-strip groove 2. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0022] Example

[0023] A head fixation device for oral CT, such as Figure 1 and Figure 2 , including an outer shell 1 and a base 2, including a threaded column 3 and a head positioning component 4, a hollow channel is provided in the middle of the outer shell 1, an internal thread 5 which is threadably matched with the threaded column 3 is provided on the inner side of the hollow channel, the end of the threaded column 3 is vertically connected to the middle of the base 2, and head positioning components 4 are respectively provided on both sides of the base 2, the head positioning component 4 includes a pull rod 41, an external rod 42, an internal rod 43 and a positioning plug 44 for positioning the patient's external auditory canal, a slide groove is provided on the side of the base 2, one end of the pull rod 41 is embedded in the slide groove, the other end of the pull rod 41 is connected to the external rod 42, the external rod 42 is provided with a top groove for the end of the internal rod 43 to be embedded, and the other end of the internal rod 43 is provided with a positioning plug 44.

[0024] This head fixation device for oral CT can keep the head stable by supporting the chin and limiting the left and right twisting of the head, effectively preventing the patient's head from moving during the examination or affecting the oral CT shooting results due to the special device worn by the patient. The device is not limited by the size of the head or various head-worn devices, can effectively fix the patient's head, and can adjust the head fixation height.

[0025] In this head fixing device for oral CT, a rubber pad is provided on the top of the housing 1, and the rubber pad can fit the chin. The pull rod 41 and the external plug rod 42 form an L shape together. The pull rod 41 enables the external plug rod 42 to extend and retract along the slide groove in the horizontal direction, thereby adjusting the spacing between the external plug rods 42 on both sides of the base 2. The internal plug rod 43 extends and retracts along the top groove, thereby adjusting the height of the positioning plug 44.

[0026] like Figure 1 The head positioning assembly 4 further includes a slider 45, and a strip groove 46 connected to the slide groove is provided on the top of the base 2, and the slider 45 passes through the strip groove and is connected to the pull rod 41. The slider 45 can realize the telescopic adjustment of the pull rod 41, and realize the horizontal position adjustment of the external rod 42.

[0027] like Figure 2 The head positioning assembly 4 further includes a slider 2 47. The side of the outer rod is provided with a strip groove 2 48 connected to the top groove. The slider 2 47 passes through the strip groove 2 48 and connects to the inner rod 43. The slider 2 47 realizes the telescopic adjustment of the inner rod 43 and the height adjustment of the positioning plug 44.

[0028] like Figure 3 (a) and Figure 3 (b), the inner side of the hollow passage in the middle of the housing 1 is provided with a pair of internal threads 5 threadably matched with the threaded column 3, such as Figure 4The thread of the threaded column 3 is an equally divided three-step thread. When rotating, the housing 1 is rotated by a certain angle and stuck to the equally divided three-step thread to achieve the connection and fixation of the thread. The three-step thread is equally attached to the threaded column 3 in a stepped shape. The first, second and third step threads are equally attached to the threaded column 3 in a stepped ring, where the first step thread is 8.3cm long, 8.3cm wide and 2cm high; the second step thread is 8.3cm long, 8.3m wide and 0.6cm high; the third step thread is 8.3cm long, 8.3cm wide and 0.6cm high. The interval between each step thread is 0.5cm.

[0029] The head fixing device for oral CT has a housing 1 with a hollow cylindrical shape at the upper end that fits the shape of the chin, with a concave arc shape on the upper side, 9.1 cm long, 9.1 cm wide, and 6.3 cm high, and is connected with the threads on the internal thread 5 tube in a nested manner. By twisting the housing 1 and turning it 90° to the left or right, the housing 1 slots and the threads of each step can be driven to nest with each other, thereby driving the device to rise and fall. The lower end of the base 2 is connected to the oral CT instrument. The threaded column 3 includes a plane blocked by the thread, and is a solid cylindrical shape with a length of 8 cm, a width of 8 cm, and a height of 4.2 cm. The base 2 is cylindrical, 10 cm long, 10 cm wide, and 0.4 cm high, and the external plug 42 is a nested rectangle with a length of 3 cm, a width of 1 cm, and a height of 8 cm-14 cm. The pull rod 41 is a nested rectangle with a length of 3 cm, a width of 16 cm-24 cm, and a height of 1 cm, and the two sides of the pull rod 41 are respectively connected to the external plug 42.

[0030] like Figure 1 The use process of this head fixation device for oral CT is to place the patient's head on the rubber support pad above the shell 1 to achieve preliminary fixation of the head. By rotating the shell 1, the slot of the shell 1 is nested with the threads of each order, and the shell 1 spirally rises or falls, thereby adjusting the height of the head. According to the width of the patient's face, the pull rods 41 on both sides of the base 2 are telescoped to adjust the distance between the two outer rods 42. According to the height of the patient, the height of the inner rod 43 is adjusted, and the positioning plugs 44 at the ends of the inner rod 43 are placed in the external auditory canals on both sides of the patient.

[0031] This type of head fixation device for oral CT can prevent the head from twisting left and right and shifting forward and backward, prevent the head from moving during CBCT shooting, ensure that the suborbital line is parallel to the scanning frame, and solve a major problem of positioning. The head fixation height can be adjusted; the upper surface of the outer shell 1 is fixedly connected with a rubber support pad, which can fit the shape of the chin and form a certain wrapping of the chin. By supporting the head, it prevents the patient's head from moving during the examination and affecting the results of the examination, thereby ensuring a smooth examination process. This type of head fixation device for oral CT has a simple structure and can avoid the display of the fixation device in the image. It is easy to operate, novel in conception, and highly practical, and can be adapted to different models of oral CT.

[0032] The above is only an implementation method of the present application, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A head fixing device for oral CT, comprising a housing and a base, characterized in that: It also includes a threaded column and a head positioning component. A hollow channel is provided in the middle of the shell. An internal thread matching the thread of the threaded column is provided on the inner side of the hollow channel. The end of the threaded column is vertically connected to the middle of the base. Head positioning components are respectively provided on both sides of the base. The head positioning component includes a pull rod, an external rod, an internal rod and a positioning plug for positioning the patient's external auditory canal. A slide groove is provided on the side of the base. One end of the pull rod is embedded in the slide groove, and the other end of the pull rod is connected to the external rod. The external rod is provided with a top groove for the end of the internal rod to be embedded, and a positioning plug is provided at the other end of the internal rod.

2. The head fixation device for oral CT according to claim 1, characterized in that: The top of the housing is provided with a rubber pad.

3. The head fixation device for oral CT according to claim 1, characterized in that: The pull rod and the external plug-in rod together form an L shape.

4. The head fixation device for oral CT according to any one of claims 1 to 3, characterized in that: The head positioning assembly also includes a slider 1. The top of the base is provided with a strip groove 1 connected to the slide groove. The slider 1 passes through the strip groove and is connected to the pull rod.

5. The head fixation device for oral CT according to any one of claims 1 to 3, characterized in that: The head positioning assembly also includes a slider 2. The side of the outer rod is provided with a strip groove 2 connected to the top groove. The slider 2 passes through the strip groove 2 and is connected to the inner rod.

6. The head fixation device for oral CT according to any one of claims 1 to 3, characterized in that: The thread of the threaded column adopts an equally divided three-step thread.

7. An oral CT, characterized in that: The invention comprises the head fixing device for oral CT according to any one of claims 1 to 6.

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