A measuring device
The measuring device, which combines a fixed base with a ceramic sphere, solves the problems of low efficiency and insufficient accuracy in measuring the taper within dental implants. It achieves high-precision, low-cost internal taper measurement, ensuring a precise fit between the dental implant and the abutment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI BOYA MAITE BIOMATERIALS CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, the taper measurement of dental implants is inefficient, prone to damage, and costly. Furthermore, the assembly fixtures require high precision and are easily worn, resulting in large measurement errors.
The device uses a fixation base that fits into ceramic spheres of different sizes. The taper of the internal conical surface of the dental implant is measured using a height measuring tool. The spheres serve as standard components to improve measurement accuracy and precision. The fixation base is adapted to the dental implant to prevent loosening and scratches.
It improves the accuracy and precision of the internal conical surface measurement of dental implants, reduces manufacturing costs, avoids wear and errors, and ensures measurement stability and precise fit.
Smart Images
Figure CN224415982U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of dental implant technology, and more specifically to a measuring device. Background Technology
[0002] Dental implants are surgically inserted into the upper and lower jawbones at the site of tooth loss. After the wound heals, an abutment and prosthesis are installed on top of the implant. Generally, the internal taper of the implant needs to be precisely measured before implantation to ensure a tight fit between the external taper of the abutment and the internal taper of the implant, preventing bacteria and debris from entering the gap and causing infection. Currently, a coordinate measuring machine or a specialized internal taper measurement kit is typically used to check the internal taper of the dental implant.
[0003] The method of using a coordinate measuring machine to detect the taper of a dental implant requires the use of a probe to collect measurement data from multiple points on the inner conical surface and then fit the inner taper. This method has low detection efficiency, is prone to damaging the inner conical surface of the dental implant during the detection process, and is also costly.
[0004] Using a specialized set of internal taper fittings to measure the taper within dental implants requires high manufacturing and assembly precision; otherwise, large measurement errors are likely to occur. However, this high precision requirement increases processing difficulties and manufacturing costs. In addition, if the fitting uses a sharp corner to contact the internal taper surface, it is easy to scratch the surface of the internal taper. Furthermore, with long-term use, the fitting will experience significant wear, and its accuracy will decrease noticeably. Utility Model Content
[0005] The purpose of this application is to provide a measuring device that can improve the accuracy of measuring the taper of the inner conical surface of a dental implant, while having a simple structure and low manufacturing cost.
[0006] To achieve the above objectives, this application provides a measuring device for measuring the taper of the inner conical surface of a dental implant, including a fixation base and a plurality of spheres with different diameters. The fixation base has a top end, and the top end forms an inwardly formed receiving cavity for fixing and accommodating the dental implant. When the dental implant is fixedly accommodated in the receiving cavity, the spheres can be detachably disposed on the inner conical surface, and the spheres disposed on the inner conical surface can all protrude from the top end of the fixation base.
[0007] Furthermore, when the dental implant is fixedly accommodated in the receiving cavity, the inner conical surface at least partially protrudes from the top of the fixation seat.
[0008] Furthermore, the diameter of the opening of the receiving cavity for connecting to the outside is smaller than the diameter of the dental implant at its maximum diameter, so that the assembled dental implant can partially protrude from the fixation seat.
[0009] Furthermore, the shape of the receiving cavity is adapted to the dental implant.
[0010] Furthermore, the fixing base also has a bottom end, which is a plane, and the center line of the receiving cavity is perpendicular to the plane.
[0011] Furthermore, it also includes a height measuring tool, which is used to measure the height of the highest point of the sphere from the bottom end of the fixation after the sphere, the fixation base, and the dental implant are assembled together.
[0012] Furthermore, the perpendicularity error between the centerline of the receiving cavity and the plane is less than 0.09 mm.
[0013] Furthermore, the diameter of each sphere is greater than the diameter d2 at the minimum diameter of the inner conical surface, and less than the diameter d1 at the maximum diameter of the inner conical surface.
[0014] Furthermore, the number of spheres is two.
[0015] Furthermore, the diameters of the spheres are D1 and D2, where D1 is greater than D2, |d1-D1| is less than or equal to 0.5 mm, and |D2-d2| is less than or equal to 0.5 mm.
[0016] The main technical effect achieved by the embodiments of this application is that the measuring device adopts a combination of a fixed base and spheres of different sizes to measure the internal cone angle of the dental implant. Due to the fixing effect of the fixed base, the measurement accuracy is improved. At the same time, as a standard part, the sphere has a higher product precision than general non-standard parts, which further improves the accuracy and precision of its measurement. Attached Figure Description
[0017] Figure 1 This is a cross-sectional view of a dental implant;
[0018] Figure 2 This is a structural diagram of the fixed base;
[0019] Figure 3 yes Figure 2 A cross-sectional view of the mounting base along the vertical direction;
[0020] Figure 4 This is a schematic diagram of the dental implant, its fixation unit, and the sphere after assembly.
[0021] Figure 5 yes Figure 4 A cross-sectional view along the vertical direction;
[0022] Figure 6 This is a schematic diagram illustrating the calculation of the dental implant in this application;
[0023] Figure 7 This is a schematic diagram of a height measuring tool used to measure the height of a dental implant, its fixation base, and the sphere after assembly.
[0024] Figure Labels
[0025] 1. Fixing base; 11. Receiving cavity; 2. Sphere; 21. First sphere; 22. Second sphere; 3. Dental implant; 31. Internal conical surface; 4. Height measuring tool. Detailed Implementation
[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The manner described in the following exemplary embodiments does not represent all manner consistent with this application.
[0027] Figure 1 This image shows a schematic diagram and cross-sectional view of a dental implant. Generally, the process of dental implantation includes the placement of the implant and the subsequent installation of the abutment and prosthesis, which is usually referred to as a dental crown. Medical professionals typically use surgical procedures to insert the implant into the upper or lower jawbone at the site of the missing tooth. After the wound heals, the abutment and prosthesis are then attached to the implant. Figure 1 As shown, to facilitate the installation of the abutment and restoration, the dental implant forms an inward mounting cavity. This cavity contains a threaded structure, through which the implant engages with the screws of the abutment, thus enabling abutment installation. The restoration is then installed onto the abutment. In existing technology, the end of the mounting cavity used to connect to the abutment typically has a conical inner conical surface 31. This inner conical surface 31 needs to precisely fit with the outer conical surface of the abutment; otherwise, bacteria or food debris can enter the gap and cause infection.
[0028] like Figure 2-5 as well as Figure 7As shown, this application discloses a measuring device for measuring the taper of the conical surface inside a dental implant. The measuring device includes a fixation base 1, multiple spheres 2 of different diameters, and a height measuring tool 4. The fixation base 1 is cylindrical in shape, with a top and a bottom. The top is concave to form a receiving cavity 11, which is used to receive and fix the dental implant 3. To ensure that the dental implant 3 can be stably placed in the receiving cavity 11 after assembly with the fixation base 1, the shape of the receiving cavity 11 is adapted to the shape of the dental implant 3. Specifically, the shape of the receiving cavity 11 can be a cone similar in shape to the dental implant 3. After the dental implant 3 is placed in the receiving cavity 11 of the fixation base 1, the dental implant 3 can be fixed to the fixation base 1 by applying appropriate external force, ensuring that the dental implant 3 does not loosen or tilt during measurement, facilitating accurate measurement of the device height. At the same time, due to the stable setting of the device, the measurement error will be relatively small.
[0029] In this embodiment, for ease of manufacturing, the overall shape of the fixation base 1 is cylindrical. In other embodiments, the shape of the fixation base 1 can be a square cylinder or a cylinder of other shapes. Furthermore, based on the structural dimensions of the dental implant 3, the top diameter of the conical receiving cavity 11 is set to 4.2 mm, the height of the receiving cavity 11 is 18 mm, and the cone angle is 4°. This ensures that when the dental implant 3 is placed in the receiving cavity 11, it can be stably fixed within the receiving cavity 11 without any positional movement. Simultaneously, the inner conical surface 31 of the dental implant 3 can appropriately protrude from the receiving cavity 11 to prevent the dental implant 3 from excessively protruding from the receiving cavity 11, which would affect the stability of the fixation base 1. In some embodiments, the height of the dental implant 3 protruding from the receiving cavity 11 ranges from 0.5 to 2.0 mm, including the end value.
[0030] The measuring device also includes multiple spheres 2 of different diameters. Here, "multiple" means two or more. The spheres 2 are standard spheres, such as the ball bearing components of rolling bearings. The material can be ceramic materials such as silicon nitride (Si3N4) or zirconium oxide (ZrO2). Currently, these ceramic balls are mass-produced and have advantages such as high dimensional and roundness accuracy, high hardness, good wear resistance, and low procurement cost. According to GB / T 308.2-2010 "Rolling Bearing Balls Part 2: Ceramic Balls" standard, the maximum diameter variation and spherical error of the G5 accuracy grade ceramic balls used for measurement is only 0.13μm. This results in high accuracy of the inner cone measured using the measuring device of this application. Furthermore, due to the high hardness and good wear resistance of the ceramic balls, their measurement accuracy will not decrease during long-term testing as an inspection tool. Moreover, because the surface of the ceramic balls is smooth and has low surface roughness, it is not easy to scratch the inner cone surface and affect the sealing of the connection.
[0031] In this embodiment, there are two spheres 2, namely a first sphere 21 and a second sphere 22, with diameters D1 and D2 respectively. In other embodiments, the number of spheres 2 can be three or four. After the dental implant 3 is accommodated and fixed to the fixation base 1, one end of the dental implant 3 with the inner conical surface 31 protrudes from the receiving cavity 11, and then the first sphere 21 and the second sphere 22 are sequentially disposed on the inner conical surface 31 of the dental implant 3. Here, "spheres 2 disposed on the inner conical surface 31 of the dental implant 3" means that both spheres 2 can be tangent to the inner conical surface 31 (e.g., ...). Figure 6 (As shown). In some special cases, although sphere 2 contacts the top of the inner conical surface 31, it is not tangent to the inner conical surface 31. Therefore, this situation does not refer to the sphere 2 being placed on the inner conical surface 31 of the dental implant 3 as described in this application. Then, the distances H1 and H2 between the highest point of the first sphere 21 and the end of the second sphere 22 furthest from the fixation base 1 and the bottom end face of the fixation base 1 are measured using a height measuring tool 4. For details, please refer to... Figure 6 During this measurement process, the sphere 2 can automatically position itself to fit well with the inner conical surface 31 by gravity, thus avoiding measurement errors caused by installation gaps.
[0032] It is particularly important to emphasize that, in order to ensure that the sphere 2 always contacts the inner conical surface 31 of the dental implant 3, the inner conical surface 31 of the dental implant 3 needs to partially protrude from the receiving cavity. See the following for details. Figure 4 ,like Figure 4 As shown, the dental implant 3 has one end protruding from the receiving cavity 11 for connecting to the abutment. This arrangement ensures that the sphere 2 always contacts the inner conical surface 31 of the dental implant 3, preventing the measurement data from being used by the measuring personnel if the sphere 2 does not contact the inner conical surface 31, thus affecting the accuracy of the measurement data. On the other hand, the protruding dental implant 3 also facilitates the application of external force to install or separate the dental implant 3 from the fixation seat 1.
[0033] like Figure 7As shown, the measuring device may also include a height measuring tool 4, which can be a micrometer or a digital ten-thousandth gauge. In this embodiment, the height measuring tool 4 is a micrometer, used to measure heights H1 and H2 after the sphere 2 is placed on the fixed base 1. To facilitate the measurement of H1 and H2, the bottom surface of the fixed base 1 is set as a plane, allowing it to be stably placed on the micrometer and ensuring that the placement angle of the fixed base 1 is fixed each time. In addition, to ensure the accuracy of H1 and H2 measurements, the centerline of the receiving cavity 11 is perpendicular to the plane containing the bottom surface of the fixed base 1. When the dental implant 3 is placed in the fixed base 1, since the shape of the receiving cavity 11 matches the outer contour of the dental implant 3, the centerline of the receiving cavity 11 coincides with the centerline of the dental implant 3, that is, the centerline of the dental implant 3 is also perpendicular to the plane containing the bottom surface of the fixed base 1. It should be noted that the perpendicularity described in the statement that the centerline of the receiving cavity 11 is perpendicular to the plane containing the bottom surface of the fixed base 1 is not absolute perpendicularity in a geometric sense. According to the measurement principle of this measuring device, the smaller the perpendicularity error between the two, the higher the measurement accuracy. However, due to the inherent measurement accuracy issues of the micrometer itself, even the absence of perpendicularity error cannot offset the measurement errors inherent in the micrometer. Theoretical calculations show that the perpendicularity of the centerline of the cavity 11 of the fixed base 1 to its bottom surface is controlled within 0.09 mm, and the measurement errors of H1 and H2 are less than 0.001 mm, which are indistinguishable using a micrometer.
[0034] Specifically, the taper measurement and calculation of the inner conical surface of dental implant 3 is as follows: Figure 6 As shown. First, the distances H1 and H2 between the highest point of the first sphere 21 and the end of the second sphere 22 furthest from the fixation base 1 and the bottom end face of the fixation base 1 are measured respectively. Based on the previously known diameters D1 and D2 of the first sphere 21 and the second sphere 22, the internal cone angle θ of the dental implant 3 is calculated using the following formula:
[0035]
[0036] To ensure that sphere 2 is tangent to the inner conical surface 31 and to guarantee the reliability of the calculation, the diameter of sphere 2 is greater than the diameter at the minimum diameter of the inner conical surface 31 and smaller than the diameter at the maximum diameter of the inner conical surface 31. In this embodiment, the diameter D1 of the first sphere 21 is greater than the diameter D2 of the second sphere 22, and |d1-D1| is less than or equal to 0.5 mm, and |D2-d2| is less than or equal to 0.5 mm, ensuring that the difference between D1 and D2 is relatively large and improving the accuracy of the measurement.
[0037] In this embodiment, D1 = 3.175 mm and D2 = 2.778 mm.
[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A measuring device for measuring the taper of the inner conical surface (31) of a dental implant (3), characterized in that, The device includes a fixation base (1) and a plurality of spheres (2) with different diameters. The fixation base (1) has a top end, and the top end forms an inwardly formed receiving cavity (11) for fixing and accommodating the dental implant (3). When the dental implant (3) is fixedly accommodated in the receiving cavity (11), the spheres (2) can be detachably disposed on the inner conical surface (31), and the spheres (2) disposed on the inner conical surface (31) can all protrude from the top end of the fixation base (1).
2. The measuring device according to claim 1, characterized in that, When the dental implant (3) is fixedly housed in the receiving cavity (11), the inner conical surface (31) protrudes at least partially from the top of the fixation seat (1).
3. The measuring device according to claim 2, characterized in that, The diameter of the opening of the receiving cavity (11) for connecting to the outside is smaller than the diameter of the dental implant (3) at its maximum diameter, so that the assembled dental implant (3) can partially protrude from the fixation seat (1).
4. The measuring device according to claim 1, characterized in that, The shape of the receiving cavity (11) is adapted to the dental implant (3).
5. The measuring device according to claim 4, characterized in that, The fixing seat (1) also has a bottom end, which is a plane, and the center line of the receiving cavity (11) is perpendicular to the plane.
6. The measuring device according to claim 5, characterized in that, It also includes a height measuring tool (4), which is used to measure the height of the highest point of the sphere (2) from the bottom of the fixation seat (1) after the sphere (2), the fixation seat (1) and the dental implant (3) are assembled together.
7. The measuring device according to claim 5, characterized in that, The perpendicularity error between the centerline of the receiving cavity (11) and the plane is less than 0.09 mm.
8. The measuring device according to claim 1, characterized in that, The diameter of each sphere (2) is greater than the diameter d2 at the minimum diameter of the inner conical surface (31), and is less than the diameter d1 at the maximum diameter of the inner conical surface (31).
9. The measuring device according to claim 8, characterized in that, The number of spheres (2) is two.
10. The measuring device according to claim 9, characterized in that, The diameters of the sphere (2) are D1 and D2, respectively, where D1 is greater than D2, |d1-D1| is less than or equal to 0.5mm, and |D2-d2| is less than or equal to 0.5mm.