Dental neck dental crown perimeter measuring device

Abstract

The utility model discloses a tooth neck dental crown perimeter measuring device which comprises a rod body, the head end of the rod body is rotatably connected with a pressing wheel made of rubber materials, the pressing wheel is provided with a ring-shaped arc-shaped notch, a clamping and matching block is fixed on the rod body, scissors are clamped and matched on the clamping and matching block, the head end of the scissors is flat, the outer end of the rod body is rotatably connected with a dental floss rotating disc, and the dental floss rotating disc is connected with the rod body. And a dental floss is wound on the dental floss turntable. The dental crown circumference measuring device can accurately measure the circumference of a dental crown so as to determine the length of a required gingival retraction cord, can conveniently detect the length of the dental floss in real time by using the dial gauge so as to determine the length of the gingival retraction cord, can adjust the angle of the pressing wheel, can be conveniently applied to the measurement of the circumference of the dental crown in different tooth positions, and is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to a mechanical device, in particular to a device for measuring circumference, particularly to a device for measuring circumference of a tooth neck and crown. Background Art

[0002] Gingival retraction technique, also known as gingival margin retraction, is a technique that uses medical or mechanical means to retract the gingival margin and expose the gingival sulcus before tooth preparation and impression taking. The purpose is to make the preparation and impression of the tooth neck more accurate and clear. Mechanical gingival retraction uses a retraction cord. Gingival retraction cords of different diameters are selected according to the depth of the gingival sulcus, and are pushed into the gingival sulcus with a special gingival retraction device. Special gingival retraction cords are impregnated with vasoconstrictor drugs and then dried, and are available in a variety of diameters. The use of gingival retraction cords can reduce damage to the gums and reduce gingival bleeding. During the tooth restoration process, the gingival margin is retracted to ensure that the preparation of the tooth neck of the restoration and the impression taken are more accurate and clear, which helps to improve the precision of the restoration.

[0003] Gingival retraction technology is commonly used in the treatment of various fixed restorations and near-gingival fillings for tooth defects and edentulous defects, such as full crowns, inlays, post crowns, etc., before tooth preparation and impression making. In the clinical operation process, the position and size of the restored teeth are different. The determination of the length of the gingival retraction line during gingival retraction is often based on the size of the crown and estimated based on experience, which often results in the intercepted gingival retraction line being too long or too short, and the gingival retraction line needs to be intercepted again, which prolongs the operation time, affects the clinical effect and work efficiency, and causes great trouble to dentists. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the above-mentioned prior art and provide a tooth neck crown circumference measuring device that can accurately measure the required gingival retraction line length, meet the needs of accurately determining the required gingival retraction line length according to the crown circumference, make the preparation and impression of the tooth neck more accurate and clear, save time and improve work efficiency.

[0005] The utility model adopts a technical solution to solve its technical problems: this device for measuring the circumference of the crown of the neck of a tooth comprises a rod body, the head end of the rod body is rotatably connected to a pressure wheel made of a rubber material, the pressure wheel is provided with a circular arc notch, a fitting block is fixed to the rod body, the fitting block is fitted with scissors, the head end of the scissors is flat, and the outer end of the rod body is rotatably connected to a dental floss turntable, on which dental floss is wound. The function of the rod body and the pressure wheel is to arrange the dental floss axially, so as to know the circumference of the dental floss, and then to accurately know the circumference of the required gingival retraction line; the function of the circular arc notch is to arrange the dental floss in a limited position, which is more conducive to accurately measuring the circumference of the crown; the function of the fitting block, the scissors, and the flat head end of the scissors is that the scissors have a dual purpose, first using the flat shape of the scissors head end to press the head end of the dental floss, so that the pressure wheel can press the dental floss in the direction of the circumference of the crown, and the head end of the dental floss does not move or move. After the dental floss is wrapped around the circumference of the tooth crown, the scissors head can be loosened to cut the end of the dental floss wrapped around the circumference with the scissors, so as to measure the length of the cut dental floss and accurately know the required gingival retraction cord length; the role of the dental floss turntable and dental floss is to provide dental floss conveniently for measuring the circumference of the tooth crown; the dental floss can use a regular whole roll of dental floss or sterilized dental floss, and the entire device needs to be fully disinfected after use; the dental floss turntable can be easily disassembled for disinfection.

[0006] Further improvement, the rod body is divided into a gripping part and an angle adjustment part, the angle adjustment part is hinged at the gripping part, the pressure wheel is rotatably connected to the angle adjustment part, and a rotating angle positioning part for rotating and positioning the angle adjustment part is installed on the gripping part. The role of the rotating angle positioning part here is to facilitate real-time adjustment of the angle of the angle adjustment part, thereby facilitating the control of the angle change of the angle adjustment part, and facilitating the application of the pressure wheel to the cervical area of ​​different teeth to provide convenient operation.

[0007] To be further improved, the rotating angle positioning piece includes a first shaft block fixed on the angle adjustment part, a square slot is opened in the first shaft block, the inner surface of the square slot is provided with a self-lubricating coating, a square block is inserted in the square slot, a first gear is fixed on the outer end of the square block, a compression spring is installed between the square block and the bottom end of the square slot, a second shaft block is fixed on the grasping part, and a second gear meshing with the first gear is fixed on the second shaft block. The function of the rotating angle positioning piece here is to conveniently control the pressure wheel to be used at a suitable angle; the function of the square slot and the square block here is to prevent the first gear from rotating when being pushed and moved, but can only move; the function of the first gear, the second gear and the compression spring here is to drive the first shaft block to rotate when the angle adjustment part adjusts the angle, thereby driving the first gear to rotate. After the first gear rotates, since the second gear is stationary, the first gear will rotate and move, and will drive the compression spring to compress and store energy. The second gear will cause the first gear to move continuously and make "click" and "click" sounds. When the suitable angle is reached, stop driving the angle adjustment part to rotate, so that the angle adjustment part can be driven to deflect in real time without deflecting and moving by itself (such as Figure 5 shown).

[0008] For further improvement, a hexagonal rubber gripping layer is installed on the gripping part. The function of the rubber gripping layer is to improve the stability of the hand holding the gripping part, and then play a very good stabilizing role in the subsequent operation of the pressing wheel pressing a circle of the crown circumference.

[0009] Further improvement, a group of first notches are arranged on the surface of the rubber grip layer. The first notches here are used to increase the friction of the hand gripping the rod body, thereby improving the gripping stability, and thus making the operation more stable and convenient.

[0010] Further improvement, a dental floss passage is opened on the rubber gripping layer, and an arc rod with a through hole is fixed on the gripping part and the angle adjustment part. Here, the dental floss passage and the arc rod play a guiding role. When the pressure wheel presses the dental floss around the circumference of the crown, it can drive the dental floss more smoothly and avoid the trouble of dental floss entanglement.

[0011] Further improvement, the dental floss passage is in a cone shape with a large outside and a small inside. Here, the dental floss passage is in a cone shape with a large outside and a small inside, which is more conducive to the dental floss passing through the dental floss passage.

[0012] Further improvement, a self-lubricating sleeve is fixed on the surface of the dental floss passage. The function of the self-lubricating sleeve is to make the dental floss move more smoothly through the dental floss passage to avoid getting stuck.

[0013] Further improvement, a rubber layer is fixed on the outside of the scissors. The function of the rubber layer is to improve the stability of the finger pressing the scissors to move the dental floss head when the scissors use the pressure piece to press the dental floss head, which is more conducive to the subsequent measurement of the crown circumference.

[0014] Further improvement, a scale is set on the plane of the rubber gripping layer. The function of the scale here is to accurately measure the length of the dental floss after the circumference of the crown is measured, and the required gingival retraction cord can be accurately cut according to the accurately measured length.

[0015] Further improvement, a set of second notches is provided on the rubber layer. The function of the second notches here is to increase the friction when the scissors are held as a pressing piece, thereby improving stability.

[0016] The beneficial effects of the utility model are:

[0017] 1). Able to accurately measure the circumference of the crown at the neck of the tooth, so as to determine the required length of the gingival retraction cord;

[0018] 2). It is convenient to use the scale to detect the length of dental floss in real time, so as to determine the length of the gingival retraction cord;

[0019] 3). The angle of the pressure wheel can be adjusted to facilitate the measurement of the crown circumference of the tooth neck in different tooth positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The three-dimensional Figure 1 ;

[0021] Figure 2 The three-dimensional view from the other side of the utility model Figure 2 ;

[0022] Figure 3 for Figure 1 A local enlarged view of area A;

[0023] Figure 4 for Figure 2 A local enlarged view of area B;

[0024] Figure 5 For Figure 1 CC profile of ;

[0025] Figure 6 It is a structural schematic diagram of the dental floss passing channel area in the utility model.

[0026] Explanation of the reference numerals: rod body 1, gripping portion 1-1, rubber gripping layer 1-1a, first notch 1a-1a, dental floss passage 1b-1a, scale 1c-1a, angle adjustment portion 1-2, pressure wheel 2, circular arc notch 2-1, snap-on block 3, scissors 4, flat 4-1, rubber layer 4-2, second notch 4-2a, dental floss turntable 5, dental floss 6, rotation angle positioning member 7, first shaft block 7-1, square slot 7-1a, self-lubricating coating 7a-1a, square block 7-2, first gear 7-3, compression spring 7-4, second shaft block 7-5, second gear 7-6, arc rod 8, self-lubricating sleeve 9. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] See attached Figure 1 , 2 , 3, 4, 5, 6: This tooth neck crown circumference measuring device includes a rod body 1, the head end of the rod body 1 is rotatably connected to a pressure wheel 2 made of rubber material, the pressure wheel 2 is provided with a circular arc notch 2-1, a card-fitting block 3 is fixed to the rod body 1, the card-fitting block 3 is card-fitted with scissors 4, the head end of the scissors 4 is flat 4-1, the outer end of the rod body 1 is rotatably connected to a dental floss turntable 5, the dental floss turntable 5 is wound with dental floss 6, and the dental floss 6 is sterilized dental floss 6.

[0029] The rod body 1 is divided into a gripping portion 1-1 and an angle adjustment portion 1-2. The angle adjustment portion 1-2 is hinged at the gripping portion 1-1. The pressure wheel 2 is rotatably connected to the angle adjustment portion 1-2. A rotating angle positioning member 7 for rotationally positioning the angle adjustment portion 1-2 is installed on the gripping portion 1-1.

[0030] The rotating angle positioning member 7 includes a first shaft block 7-1 fixed on the angle adjustment part 1-2, a square slot 7-1a is opened in the first shaft block 7-1, the inner surface of the square slot 7-1a is provided with a self-lubricating coating 7a-1a, a square block 7-2 is inserted into the square slot 7-1a, a first gear 7-3 is fixed to the outer end of the square block 7-2, a compression spring 7-4 is installed between the square block 7-2 and the bottom end of the square slot 7-1a, a second shaft block 7-5 is fixed on the grasping part 1-1, and a second gear 7-6 meshing with the first gear 7-3 is fixed on the second shaft block 7-5.

[0031] A hexagonal rubber grip layer 1-1a is mounted on the grip portion 1-1.

[0032] A group of first notches 1a - 1a is provided on the surface of the rubber grip layer 1 - 1a .

[0033] A dental floss passage 1b-1a is provided on the rubber gripping layer 1-1a, and an arc-shaped rod 8 with a passing hole is fixed on both the gripping portion 1-1 and the angle adjustment portion 1-2.

[0034] The dental floss passage 1b-1a is in a cone shape with a large outside and a small inside.

[0035] A self-lubricating sleeve 9 is fixedly attached to the surface of the dental floss passage 1b-1a.

[0036] A rubber layer 4 - 2 is fixed to the outside of the scissors 4 .

[0037] A scale 1c-1a is provided on the plane of the rubber grip layer 1-1a.

[0038] A group of second notches 4 - 2 a are provided on the rubber layer 4 - 2 .

[0039] The working principle of the utility model is as follows: when in use, before tooth preparation and dura mater removal, and when filling the proximal gingival end, the required gingival retraction cord length is measured, and the dental floss 6 only needs to be passed through the dental floss passage 1b-1a and then through each arc-shaped rod 8, so that the head end of the dental floss 6 is located at the side end of the pressing wheel 2, and then the scissors 4 are taken off the card-matching block 3, and the head end of the dental floss 6 is placed on the tooth neck area with a wide visual eye and lowered, and the head end of the dental floss 6 is pressed by the flat 4-1 area of ​​the head end of the scissors 4, and then the circular arc-shaped recess 2-1 on the pressing wheel 2 is used to continuously press the dental floss 6 located at the side end of the pressing wheel 2, and the dental floss 6 located on the dental floss turntable 5 is continuously drawn away, so that the pressing wheel 2 is pressed around the circumference direction of the crown for one circle, thereby completing the pressing of the tooth neck The circumference of the crown area is measured, and then the head end of the scissors 4 releases the head end of the dental floss 6, and the scissors 4 are used to cut the dental floss 6. At this time, the cut end of the dental floss can be connected with the head end of the dental floss. Finally, the cut dental floss is taken to the scale 1c-1a to measure the length, so as to obtain the accurate circumference of the crown, and then the circumference of the gingival retraction cord can be accurately determined. The required circumference of the gingival retraction cord can be cut according to the length measured by the dental floss, so as to achieve a good gingival retraction effect and improve the clarity of the impression and the precision of the restoration; when the angle of the pressure wheel 2 needs to be adjusted, only the angle adjustment part 1-2 needs to be bent in real time to obtain the required angle that is easy to operate; the entire device needs to be fully disinfected after use.

[0040] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A tooth neck crown circumference measuring device, comprising a rod body (1), characterized in that: The head end of the rod body (1) is rotatably connected to a pressure wheel (2) made of rubber material, and a circular arc-shaped notch (2-1) is provided on the pressure wheel (2). A snap-fit ​​block (3) is fixed on the rod body (1), and a pair of scissors (4) is snap-fitted on the snap-fit ​​block (3). The head end of the scissors (4) is flat (4-1). The outer end of the rod body (1) is rotatably connected to a dental floss turntable (5), and dental floss (6) is wound on the dental floss turntable (5).

2. The tooth neck crown circumference measuring device according to claim 1, characterized in that: The rod body (1) is divided into a gripping portion (1-1) and an angle adjustment portion (1-2); the angle adjustment portion (1-2) is hinged at the gripping portion (1-1); and a rotating angle positioning member (7) for rotationally positioning the angle adjustment portion (1-2) is installed on the gripping portion (1-1).

3. The device for measuring the circumference of a tooth neck and crown according to claim 2, characterized in that: The rotary angle positioning member (7) comprises a first shaft block (7-1) fixed on the angle adjustment portion (1-2), a square slot (7-1a) being provided in the first shaft block (7-1), a square block (7-2) being inserted into the square slot (7-1a), a first gear (7-3) being fixed to the outer end of the square block (7-2), a compression spring (7-4) being installed between the square block (7-2) and the bottom end of the square slot (7-1a), a second shaft block (7-5) being fixed on the gripping portion (1-1), and a second gear (7-6) meshing with the first gear (7-3) being fixed on the second shaft block (7-5).

4. The device for measuring the circumference of a tooth neck and crown according to claim 3, characterized in that: A hexagonal rubber gripping layer (1-1a) is installed on the gripping portion (1-1).

5. The device for measuring the circumference of a tooth neck and crown according to claim 4, characterized in that: A group of first notches (1a-1a) is arranged on the surface of the rubber gripping layer (1-1a).

6. The device for measuring the circumference of a tooth neck and crown according to claim 5, characterized in that: The rubber gripping layer (1-1a) is provided with a dental floss passing channel (1b-1a), and an arc-shaped rod (8) with a passing hole is fixed on both the gripping portion (1-1) and the angle adjustment portion (1-2).

7. The device for measuring the circumference of a tooth neck and crown according to claim 6, characterized in that: The dental floss passage (1b-1a) is in a cone shape that is larger on the outside and smaller on the inside.

8. The device for measuring the circumference of a tooth neck and crown according to claim 7, characterized in that: The dental floss is fixedly attached to the surface of the passage (1b-1a) through which the self-lubricating sleeve (9) is passed.

9. The device for measuring the circumference of a tooth neck and crown according to claim 1, characterized in that: A rubber layer (4-2) is fixed to the outside of the scissors (4).

10. The device for measuring the circumference of a tooth neck and crown according to claim 4, characterized in that: A scale (1c-1a) is arranged on the plane of the rubber gripping layer (1-1a).

11. The device for measuring the circumference of a tooth neck and crown according to claim 9, characterized in that: A group of second notches (4-2a) is provided on the rubber layer (4-2).

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