Oral cavity model measuring tool
By designing a dental model measurement tool with a sliding rod and sleeve, the problems of cumbersome operation and inaccurate measurement of existing tools have been solved, achieving simplified operation and improved measurement accuracy, especially in the measurement of Spee curves and dental arch symmetry.
Patent Information
- Application Number
- CN202422501805.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Existing oral model measurement tools are cumbersome to operate and produce inaccurate results, especially when measuring Spee curves and dental arch symmetry, where significant errors occur.
A dental model measurement tool including a sliding rod and a sleeve was designed. By combining the sliding rod and sleeve with a plastic plate and a scale network, the measurement operation is simplified and the measurement accuracy is improved.
It achieves simplicity and accuracy in oral model measurement, enabling rapid and precise measurement of parameters such as Spee curves, dental arch coverage, symmetry, and tooth width.
Smart Images
Figure CN223489883U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oral model measurement, and in particular to an oral model measurement tool. Background Technology
[0002] In today's society, with the development of human civilization and the continuous improvement of living standards, interactions between people are becoming more frequent, and the number of people seeking orthodontic treatment due to malocclusion is growing. For patients seeking treatment, examination and diagnosis require the use of dental models, X-rays, and facial contouring. Among these, dental model measurement plays a crucial role in the diagnosis of malocclusion and the determination of treatment plans. The dental models not only aid in diagnosis and treatment planning but are also compared with the results during orthodontic treatment. For example, the alignment of teeth and changes in the length and width of the dental arch are observed, which helps improve the accuracy of examination, diagnosis, and treatment. However, existing dental model measurement tools mainly consist of rulers, wires, and gauges, making their use cumbersome and inaccurate.
[0003] For example, the Spee curve, as an important indicator in orthodontic treatment, often appears during the correction of malocclusions such as deep overbite. When measuring the Spee curve, a ruler is usually placed on the incisal edge of the lower incisor and the cusp of the last lower molar. The dentist visually estimates the distance from the lowest point of the Spee curve on both sides to the ruler, taking one measurement on each side of the dental arch. The average of the two measurements plus 0.5 mm is the gap required to level the dental arch or correct the occlusal curve. When measuring the symmetry of the dental arch, a copper wire is used, starting from the mesial contact point of the lower first molar, along the buccal cusp of the lower premolar, the cusp of the lower canine, passing through the incisal edge of the normally aligned lower incisors, to the mesial contact point of the contralateral lower first molar. If it is necessary to measure the arc length of the maxillary dental arch, start from the mesial contact point of the maxillary first molar, along the surface of the premolar to the cusp of the canine, and then along the incisal edge of the maxillary incisor to the mesial contact point of the contralateral maxillary first molar. Alternatively, the length of the dental arch arc can be measured in segments using dividers or vernier calipers, and the sum of the lengths of each segment is the current length of the dental arch arc.
[0004] The existing oral model measurement process is cumbersome, time-consuming, and the measurement results have significant errors. Utility Model Content
[0005] Therefore, the purpose of this utility model is to provide a tool for measuring oral cavity models.
[0006] A dental model measurement tool includes a first positioning post, which comprises a sleeve and a rod. The sleeve is a hollow cylinder with a through hole along its axial direction. The rod has a diameter smaller than the diameter of the through hole and passes through the through hole of the sleeve. The portion of the rod inside the sleeve, near the end of the sleeve, has a shoulder with a larger diameter. The diameter of the shoulder is smaller than the inner diameter of the sleeve but larger than the diameter of the through hole. The rod is slidable relative to the sleeve along its axial direction.
[0007] The oral model measuring tool described in this utility model, through the setting of a sliding rod and sleeve, allows for the measurement of the coverage of the oral model by observing the change in the distance the rod extends beyond the sleeve. It is simple to operate and accurate in measurement.
[0008] Furthermore, the surface of the rod is provided with graduations along the axial direction.
[0009] Furthermore, it also includes a plastic plate; one end of the sleeve is provided with a sleeve shoulder with a larger diameter; the plastic plate is provided with a plastic plate groove with a width the same as the outer diameter of the sleeve, and the plastic plate groove is provided with a slot with a width the same as the sleeve shoulder along the extension direction of the plastic plate; the sleeve is installed in the plastic plate groove, and the sleeve shoulder is engaged in the slot. By contacting the plastic plate with the incisal edge of the incisor and the cusp of the last molar, and observing the distance the rod extends out of the plastic plate, the spee curve of the oral model can be measured. The operation is simple and the measurement is accurate.
[0010] Furthermore, the groove is located on the center line of the plastic plate, the plastic plate is transparent, and a scale network is provided on the plastic plate.
[0011] Furthermore, the end of the rod near the shoulder of the sleeve is configured as a pointed tip.
[0012] Furthermore, the first positioning post also includes a spring; the spring is disposed inside the sleeve, with one end abutting against the end of the sleeve without a shoulder, and the other end abutting against the shoulder of the rod; when the spring is not under force, the shoulder of the rod is close to the shoulder of the sleeve.
[0013] Furthermore, it also includes a second positioning post and a third positioning post, which are mounted on the grooves of the plastic plate. The symmetry of the oral cavity model can be measured through the scale network of the three positioning posts and the plastic plate.
[0014] Furthermore, the second and third positioning posts have the same structure as the first positioning post, but are smaller in size. It also includes a connector, which is a long plate-shaped structure with a groove in the middle, the width of which is the same as the outer diameter of the sleeves of the second and third positioning posts. The connector groove has a slot along the extension direction of the connector, the width of which is the same as the shoulder of the sleeve of the second and third positioning posts. The outer width of the connector is the same as the inner width of the plastic plate groove. The second and third positioning posts are mounted on the connector, the sleeve shoulders are engaged in the connector slot, and the sleeves are located in the connector groove. The second and third positioning posts can slide along the connector groove. The tooth width can be measured by sliding the second and third positioning posts on the connector.
[0015] Furthermore, the connector is provided with a scale along the groove.
[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description
[0017] Figure 1 This is a front view of the first positioning post in Embodiment 1 of this utility model;
[0018] Figure 2 For along Figure 1 A sectional view after cutting along line AA in the middle;
[0019] Figure 3 This is a schematic diagram of the oral model measuring tool according to Embodiment 2 of this utility model;
[0020] Figure 4 This is a schematic diagram of the oral cavity model measuring tool according to Embodiment 3 of this utility model;
[0021] Figure 5 This is a schematic diagram of the connector and the second and third positioning posts in Embodiment 3 of this utility model. Detailed Implementation
[0022] Example 1
[0023] The oral cavity model measuring tool of this utility model includes a first positioning post. The first positioning post includes a sleeve 10, a rod 20, and a spring 30. The sleeve 10 is a hollow cylinder with a through hole along the axial direction. One end of the sleeve 10 has a sleeve shoulder 11 with a larger diameter. The diameter of the rod 20 is slightly smaller than the diameter of the through hole. The rod 20 passes through the through hole of the sleeve 10 and through the sleeve 10. The end of the rod 20 near the sleeve shoulder 11 is set as a tip 21. The rod 20 can slide relative to the sleeve 10 along the axial direction. The surface of the rod 20 is provided with... The rod 20 has a large-diameter shoulder 22 near its tip. The shoulder 22 is located inside the sleeve 10, and its diameter is slightly smaller than the inner diameter of the sleeve 10 but larger than the diameter of the through hole in the sleeve 10. The spring 30 is located inside the sleeve 10, with one end abutting against the shoulderless end of the sleeve 10 and the other end abutting against the shoulder 22. When the spring 30 is not under force, the shoulder 22 is close to the opening of the sleeve 10.
[0024] To measure the coverage of the oral model, which is the horizontal distance by which the maxillary teeth cover the mandibular teeth, the teeth of the oral model are closed, the first positioning post is placed horizontally, the tip 21 of the rod abuts against the labial surface of the mandibular incisor, and the sleeve 10 is pressed towards the oral model. The sleeve 10 moves relative to the rod 20 toward the tip 21 of the rod. At this time, the part of the tip 21 exposed outside the sleeve 10 will become shorter. By observing the change of the scale on the rod 20, the coverage of the oral model can be measured.
[0025] Example 2
[0026] This embodiment is basically the same as embodiment 1, except that it also includes a plastic plate 200. A groove is provided at the center line of the plastic plate 200. The groove of the plastic plate 200 has a slot with the same width as the sleeve shoulder 11 along the extension direction of the plastic plate. The width of the groove of the plastic plate 200 is the same as the outer diameter of the sleeve 10. The first positioning rod is installed on the plastic plate 200. The sleeve shoulder 11 is engaged in the slot. The sleeve 10 is located in the groove and can slide along the direction of the groove.
[0027] When measuring the Spee curve of the oral model, the first positioning post is placed vertically, the tip of the rod 21 is aligned with the lowest cusp, and the plastic plate 200 is pressed down so that the plastic plate 200 contacts the incisal edge of the lower incisor and the cusp of the last molar. The distance that the tip of the rod 21 extends out of the plastic plate 200 at this time is the curvature of the Spee curve.
[0028] Example 3
[0029] This embodiment is basically the same as Embodiment 2, except that it also includes a second positioning post, a third positioning post, and a connector 300. The second and third positioning posts have the same structure as the first positioning post, but are smaller in size. The sleeve shoulder 11 of the second and third positioning posts is smaller than that of the first positioning post. The connector 300 has a long plate-shaped structure with a groove in the middle, the width of which is the same as the outer diameter of the sleeve 10 of the second and third positioning posts. The groove of the connector 300 has a slot with the same width as the sleeve shoulder 11 of the second and third positioning posts along the extension direction of the connector 300. The outer width of the connector 300 is the same as the inner width of the groove of the plastic plate 200. The second and third positioning posts are installed on the connector 300, the sleeve shoulder 11 is engaged in the slot of the connector 300, and the sleeve 10 is located in the groove of the connector 300 and can slide along the groove of the connector 300. The connector 300 is installed in the groove of the plastic plate 200. The connector 300 has graduations along the slide groove, and these graduations can display the distance between the second positioning post and the third positioning post. The plastic plate 200 is transparent and has a graduated grid on it.
[0030] When analyzing the symmetry of the oral cavity model, the first, second, and third positioning posts are installed at intervals along the grooves of the plastic plate 200, with the plastic plate 200 and the positioning posts perpendicular to each other. The tips 21 of the three positioning posts are vertically pressed against the mid-palatal suture. The plane containing the three positioning posts is then the plane containing the mid-palatal suture, ensuring that the plastic plate 200 is perpendicular to the plane containing the mid-palatal suture. The straight line of the three positioning posts on the plastic plate 200 is located in the exact center of the plastic plate. The plastic plate 200 is then pressed down. When the plastic plate 200 is stopped down by the first tooth cusp it comes into contact with and cannot be pressed further down, the symmetry of the model can be analyzed using the scale grid on the plastic plate 200.
[0031] When measuring the width of a tooth, the width of the tooth can be measured by sliding the second positioning post and the third positioning post on the connector 300. The second positioning post and the third positioning post are respectively close to the two sides of the tooth, and the width of the tooth can be measured by the scale on the connector 300.
[0032] The oral model measurement tool of this invention is flexible in combination, widely applicable, and easy to operate. By installing different numbers of positioning rods on the plastic plate, various types of oral model measurements can be performed.
[0033] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.
Claims
1. A dental model measurement tool, characterized in that: The device includes a first positioning post, which comprises a sleeve and a rod. The sleeve is a hollow cylinder with a through hole along its axial direction. The rod has a diameter smaller than the diameter of the through hole and passes through the through hole of the sleeve. The portion of the rod inside the sleeve, near the end of the sleeve, has a larger diameter shoulder. The diameter of the shoulder is smaller than the inner diameter of the sleeve but larger than the diameter of the through hole. The rod can slide relative to the sleeve along its axial direction.
2. The oral cavity model measurement tool according to claim 1, characterized in that: The surface of the rod is marked with graduations along the axial direction.
3. The oral model measurement tool according to claim 1, characterized in that: It also includes a plastic plate; one end of the sleeve is provided with a sleeve shoulder with a larger diameter; the plastic plate is provided with a plastic plate groove with a width the same as the outer diameter of the sleeve, and the plastic plate groove is provided with a slot with a width the same as the sleeve shoulder along the extension direction of the plastic plate; the sleeve is installed in the plastic plate groove, and the sleeve shoulder is engaged in the slot.
4. The oral cavity model measurement tool according to claim 3, characterized in that: The groove is located on the center line of the plastic plate, which is transparent and has a graduated grid.
5. The oral model measurement tool according to claim 3, characterized in that: The end of the rod near the shoulder of the sleeve is set as a pointed tip.
6. The oral cavity model measurement tool according to claim 1, characterized in that: The first positioning post also includes a spring; the spring is disposed inside the sleeve, with one end abutting against the end of the sleeve without a shoulder, and the other end abutting against the shoulder of the rod; when the spring is not under force, the shoulder of the rod is close to the shoulder of the sleeve.
7. The oral model measurement tool according to claim 4, characterized in that: It also includes a second positioning post and a third positioning post, which are installed on the groove of the plastic plate.
8. The oral model measurement tool according to claim 7, characterized in that: The second and third positioning posts have the same structure as the first positioning post, but are smaller in size. The system also includes a connector, which is a long plate-shaped structure with a groove in the middle, the width of which is the same as the outer diameter of the sleeves of the second and third positioning posts. The connector groove has a slot along its extension direction with a width the same as the shoulder of the sleeve of the second and third positioning posts. The outer width of the connector is the same as the inner width of the plastic plate groove. The second and third positioning posts are mounted on the connector, with the sleeve shoulder engaged in the connector slot, and the sleeve located within the connector groove. The second and third positioning posts can slide along the connector groove.
9. The oral model measurement tool according to claim 8, characterized in that: The connector is marked with graduations along the groove.