WO2019085381A1

WO2019085381A1 - Measuring device for measuring jaw opening and/or continuous missing tooth gap

Info

Publication number: WO2019085381A1
Application number: PCT/CN2018/080644
Authority: WO
Inventors: 于海洋; 陈昭昭; 陈曦
Original assignee: 四川大学
Priority date: 2017-11-02
Filing date: 2018-03-27
Publication date: 2019-05-09
Also published as: CN208640949U

Abstract

Provided is a measuring device for measuring jaw opening and/or continuous missing tooth gap, comprising a connecting rod (4) and a measuring head located at the upper end of said connecting rod (4). Said measuring head comprises a first square ruler (1a) and a second square ruler (1b), the length of said first square ruler (1a) being larger than that of said second square ruler (1b). The lower end of said first square ruler is connected to the upper end of said connecting rod (4), and the upper end of said first square ruler (1a) is connected to the lower end of said second square ruler (1b). Said measuring device designed for measuring the maximum jaw opening degree of a patient can measure the jaw opening degree and/or the continuous missing tooth gap.

Description

Measuring device for opening degree and/or continuous missing tooth gap measurement

Technical field

The invention relates to the technical field of oral implant restoration measurement, in particular to a measuring device for opening degree and/or continuous missing tooth gap measurement.

Background technique

Dental implants are favored by patients with missing teeth because they do not damage natural teeth, have high comfort and good aesthetic effects. They are also one of the important means to repair lost teeth. The development of oral implant technology has been more than 40 years old. In the continuous development, clinicians and scholars gradually explore more scientific and rational treatment plans and techniques through case accumulation and experimental research, which makes the postoperative success rate of dental implants gradually improve. The most commonly used implants currently consist of two parts, including the implant in the jaw and the upper restoration in the mouth. At the same time, the concept of oral implant restoration has also shifted from “surgical-oriented” to “repair-oriented”. However, while a large number of dental implants are used in clinical treatment, related complications continue to emerge. Studies have shown that the causes of dental implant complications include poor three-dimensional position of the implant, insufficient soft tissue thickness around the implant, and poor restoration design. The occurrence of the above factors is mostly related to the lack of preoperative spatial analysis. Therefore, in order to reduce the occurrence of adverse events such as dental implant complications and better achieve the restoration-oriented implant placement, preoperative intraoral and model space analysis is necessary.

At present, most clinicians adopt model analysis and visual methods for intraoral analysis. The intraoral analysis is highly dependent on the doctor's experience, and is susceptible to errors caused by factors such as angle and line of sight, and often misses the patient's opening degree (maximum opening, up and down The vertical distance between the edges of the central incisors and the occlusion distance (the vertical distance between the upper surface of the implant and the upper jaw when the upper and lower teeth are in contact with the upper and lower teeth), which leads to problems such as difficulty in repairing later. The model analysis firstly prepares the dentition model by performing the female mold on the dentition, injecting the gypsum into the female mold, and then measuring the part to be repaired. Due to the irregular shape of the dentition model to be repaired, it is difficult to operate with a ruler, the operation process is cumbersome and the measurement accuracy is not good. After the measurement, it is often necessary to rely on experience to perform secondary processing on the data.

In summary, the current intraoral and model space analysis relies on clinical experience, lacking accurate and efficient measurement methods, and clear measurement methods and standards.

Summary of the invention

It is an object of the present invention to provide a measuring device for opening degree and/or continuous missing tooth gap measurement, which is simple in structure and simple in use, and can accurately and quickly measure opening degree and/or continuous missing tooth gap. Solving the current intraoral and model space analysis relies on clinical experience and lacks accurate and efficient measurement methods.

The invention is achieved by the following technical solutions:

Measuring device for opening degree and/or continuous missing tooth gap measurement, comprising a connecting rod and a measuring head, the measuring head is located at an upper end of the connecting rod, the measuring head is in a "convex" shape, comprising a first square ruler and a first The square ruler has a length greater than a length of the second square ruler, the lower end of the first square ruler is connected to the upper end of the connecting rod, and the upper end is connected to the lower end of the second square ruler. In the technical solution, the longitudinal direction of the first square ruler and the longitudinal direction of the second square ruler are perpendicular to the direction of the connecting rod, and the front surface of the upper end of the second square ruler is provided with a scale along the longitudinal direction. The measuring device in this program can be used for routine implant surgery and digital guide plate implant surgery. According to the requirements of the two kinds of surgery, the length of two square feet is preset to facilitate direct comparison. When the patient has the largest mouth opening, the measuring head is erected in the patient to be repaired area, the first square ruler and the second square ruler are placed vertically, and the lower end of the second square ruler is vertically contacted with the patient to be repaired, and the upper end is not blocked by the jaw tooth. If the opening height is greater than the length of the second square ruler, the patient's implant operation space meets the requirements for routine implant surgery; otherwise, the implant operation space is insufficient, and the patient is not suitable for routine implant surgery; likewise, the first square ruler is used. The lower end is vertically in contact with the patient to be repaired, and the other end is not blocked by the jaw teeth, indicating that the opening height is greater than the length of the first square ruler, and the patient's implantation operation operation space satisfies the requirements for performing digital guide plate implantation surgery; otherwise, the patient is not suitable Digital guide plate implant surgery. By using the first measuring ruler to directly measure the maximum opening degree of the patient, it is possible to easily and accurately determine whether the operating space during the operation is sufficient, and to avoid the consequences of the surgical instrument being blocked and inoperable due to visual misjudgment. The measuring device in the present scheme can also be used for determining the number and position of implants in which a plurality of teeth are continuously missing. When using, the operator holds the measuring device in the present scheme, and the scaled side faces up, and the second square ruler The side edge is close to the adjacent side of the natural tooth near the gap side, and the scale of the front side of the second square ruler is used to compare the position of the center of the implant in the future, so that the comparison of the continuous missing tooth gap with multiple missing teeth can be conveniently performed, and the auxiliary operation is performed. The choice of implant placement and model is made. In addition, the measuring device can be used for both the opening measurement of conventional implant surgery and digital guide plate implantation, as well as the number and position determination of multiple missing teeth, which can be used more than one foot, avoiding the use of multiple tools, not only for carrying and storage. And effectively save resources and costs.

As a further improvement of the present invention, the width of the first square ruler is the same as the width of the second square ruler.

Further, the thickness of the first square ruler is the same as the thickness of the second square ruler, and the first square ruler and the second square ruler are located on the same plane.

Further, the distance between the two sides of the lower end of the first square ruler to the side of the second square ruler closest thereto is equal.

As a further improvement of the present invention, the connecting rod includes an upper connecting rod, a middle connecting rod and a lower connecting rod which are sequentially connected from top to bottom, wherein: in a right angle three-dimensional coordinate system, the lower end of the lower connecting rod is placed at the origin o, the lower connecting rod is placed on the positive half shaft of the y-axis, and the middle connecting rod is inclined toward the negative half-axis of the z-axis, so that the middle connecting rod and the lower connecting rod form an angle A on the yz plane; the lower end of the upper connecting rod is connected to the lower part The connecting rod has an upper end inclined to the positive half-axis direction of the z-axis and an angle B formed in the yz plane with the middle connecting rod. Since the mouth is a cavity, the teeth are located in the cavity. When the lower connecting rod is used to hold the measuring rod into the inlet cavity, the angle B of the middle and upper connecting rods on the yz plane is favorable for the measuring ruler to cross the lip to reach the area to be repaired ( When measuring, the lips are located in the recess formed at the angle B between the middle connecting rod and the upper connecting rod, and the ruler is not blocked; and the middle connecting rod and the lower connecting rod form an angle A on the yz plane, so that the measurer The hand is not at the same level as the working end of the measuring ruler but on the lower plane, avoiding the occlusion of the measuring area by the tissue outside the repairing area, which facilitates accurate data collection and recording, wherein the angle A and the angle are included. The degree of B can be between 120° and 135°.

Further, the middle connecting rod is also inclined toward the positive half or negative axis of the x-axis, so that the middle connecting rod and the upper connecting rod form an angle C with the y-axis on the xy plane, the angle C The angle is between 120°-180° and not equal to 180°, that is, an angle is formed between the upper connecting rod and the y-axis, and the angle is not more than 60°. Since the corner of the mouth tends to block the measuring scale when measuring the deep area to be repaired in the oral cavity, in the technical solution, the angle of the middle connecting rod and the upper connecting rod on the xy plane allows the working end of the measuring rod to penetrate the oral cavity across the corner of the mouth. Deep, it can reduce the blockage of the corner of the mouth, which is conducive to accurate data collection and recording.

Preferably, the angle A is 135° and the angle B is 120°.

Further, the connecting rod further comprises a connecting cylinder and a hexagon body, and the hexagonal body is connected between the connecting cylinder and the lower connecting rod.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The measuring device of the invention directly compares the maximum opening degree of the patient, and can easily and accurately determine whether the operating space during the operation is sufficient, and avoids the consequences of the surgical instrument being blocked and inoperable due to visual misjudgment;

2. When the number and position of the implants in which multiple teeth are continuously missing are determined by the measuring device of the present invention, the measurement is simple and convenient, and the number and center of the implant can be quickly determined.

3. Compared with visual inspection or ordinary ruler, the measurement device of the invention is simpler and more accurate, and can more effectively measure the spatial characteristics of the part to be repaired, and provides a basis for designing parameters such as implant size and implantation position. .

4. The invention has simple structure and convenient use.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the present invention, and are not intended to limit the embodiments of the invention. In the drawing:

Figure 1 is a schematic structural view of a connecting rod;

Figure 2 is a schematic view of the structure of the present invention;

Figure 3 is a schematic view showing the dimensions of the measuring device in the third embodiment;

4 is a schematic view showing the projection of the upper connecting rod and the middle connecting rod in the xz plane in the second embodiment.

Reference numerals and corresponding component names:

1a-first square ruler, 1b-second square ruler, 4-connecting rod, 4a-connecting cylinder, 4b-connecting rod body, 4b1-lower connecting rod, 4b2-middle connecting rod, 4b3-upper connecting rod, 4c - Hexagon, projection of the 5-central connecting rod on the xz plane, projection of the 6-up connecting rod on the xz plane.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. As a limitation of the invention.

In the description of the present invention, it is to be understood that the terms "front", "back", "left", "right", "upper", "lower", "vertical", "horizontal", "high", The orientation or positional relationship of the indications "low", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, and does not indicate or imply the indicated device or The elements must have a particular orientation, are constructed and operated in a particular orientation and are therefore not to be construed as limiting the scope of the invention.

[Example 1]

As shown in FIG. 2, a measuring device for opening degree and/or continuous missing tooth gap measurement includes a connecting rod 4 and a measuring head, which is located at the upper end of the connecting rod 4.

As shown in FIG. 1 , the connecting rod 4 is a curved long rod, and includes a connecting rod body 4b, a connecting cylinder 4a and a hexagonal body 4c. The hexagonal body 4c is a hexagonal prism with an upper end surface, a lower end surface and a cross section. In the form of a regular hexagon, the upper end surface of the hexagonal body 4c is connected to the lower end of the connecting rod body 4b, and the lower end surface of the hexagonal body 4c is connected to the upper end of the connecting cylinder 4a, and the axial direction of the connecting cylinder 4a is a vertical direction.

The connecting rod body 4b includes an upper connecting rod 4b3, a middle connecting rod 4b2 and a lower connecting rod 4b1 which are sequentially connected from top to bottom. The lower connecting rod 4b1 is vertically arranged, and the upper connecting rod 4b3 and the middle connecting rod 4b2 are inclined to some extent. In the right-angle three-dimensional coordinate system, if the lower end of the lower connecting rod 4b1 is placed at the origin o, the lower connecting rod 4b1 is placed on the positive half shaft of the y-axis, and the positions of the upper connecting rod 4b3 and the middle connecting rod 4b2 can make the middle connecting rod 4b2 The negative half-axis direction of the z-axis is inclined, so that the middle connecting rod 4b2 and the lower connecting rod 4b1 form an angle A on the yz plane; the lower end of the upper connecting rod 4b3 is connected to the lower connecting rod 4b1, and the upper end is inclined to the positive half-axis direction of the z-axis And forming an angle B with the middle connecting rod 4b2. Angles A and B range from 120° to 135°

The positive half-axis direction of the x-axis is the front and the negative half-axis direction is the rear, the positive half-axis direction of the y-axis is the upper and the negative half-axis direction is the lower, and the negative half-axis direction of the z-axis is the left and the positive half-axis. When the direction is right, the middle connecting rod 4b2 is inclined to the left side of the lower connecting rod 4b1 so as to form an angle A with the middle connecting rod 4b2; the upper end of the upper connecting rod 4b3 is inclined to the right side with respect to the lower end thereof and is connected to the middle connecting rod An angle B is formed between 4b2. The lower end of the lower connecting rod 4b1 is connected to the upper end surface of the hexagonal body 4c. In this embodiment, the upper connecting rod 4b3, the middle connecting rod 4b2 and the lower connecting rod 4b1 have a square cross section.

As shown in FIG. 2, the measuring head has a "convex" shape, and includes a first square ruler 1a and a second square ruler 1b. The lower end of the first square ruler 1a is connected to the upper end of the upper connecting rod 4b3 of the connecting rod 4. The upper end is connected to the lower end of the second square ruler 1b to form a "convex" shape structure. The longitudinal direction of the first square rule 1a and the longitudinal direction of the second square rule 1b are perpendicular to the extending direction of the upper connecting rod 4b3.

The length L2 of the first square ruler 1a is greater than the length L1 of the second square ruler 1b, and the distance between the two sides of the lower end of the first square ruler 1a and the side of the second square ruler 1b closest thereto is equal, the first side The thickness and width of the first ruler 1a and the second square ruler 1b are the same as the second square ruler 1b. The front face of the first square ruler 1a is located on the same plane as the front face of the second square ruler 1b, and the first square ruler 1a The back surface is located on the same plane as the back surface of the second square ruler 1b, so that the first square ruler 1a and the second square ruler 1b are all on the same plane. In fact, the first square ruler 1a and the second square ruler 1b can be It is integrally formed into a uniform thickness.

[Example 2]

Based on the embodiment 1, the embodiment further improves the connecting rod 4:

When the middle connecting rod 4b2 is inclined toward the negative half-axis direction of the z-axis, it is also inclined toward the negative half-axis direction of the x-axis, that is, inclined backward, so that the middle connecting rod 4b2 and the lower connecting rod 4b1 are still in the xy plane. Forming an angle C, the angle of the angle C is between 120°-180° and not equal to 180°, that is, the angle between the middle connecting rod 4b2 and the positive half shaft of the y-axis is not more than 60°, in other words, the middle connecting rod 4b2 is also tilted back, with an angle of inclination of less than 60°.

The projection of the upper connecting rod 4b3 and the middle connecting rod 4b2 on the xy plane is as shown in Fig. 4, where 5 is the projection of the middle connecting rod 4b2 on the xz plane, and 6 is the projection of the upper connecting rod 4b3 on the xz plane.

In other embodiments, when the middle connecting rod 4b2 is inclined in the negative half-axis direction of the z-axis, it may be inclined toward the positive half-axis direction of the x-axis, that is, inclined rearward, and the angle is the same as this embodiment.

[Example 3]

This embodiment is a further improvement of Embodiment 1 to provide a specific size for the measuring device for opening degree and/or continuous missing tooth gap measurement of Embodiment 1.

(a) connecting rod

In this embodiment, the connecting rod is as shown in FIG. 3, the lower end of the connecting rod 4 is a connecting cylinder 4a having a length of 5 mm and a diameter of 3 mm, and the joint between the connecting cylinder 4a and the connecting rod body 4b is a hexagon having a height of 2 mm and a side length of 2 mm. The connecting rod body 4b is a curved long rod, the cross section of which is a square with a side length of 3 mm, and the connecting rod body 4b is divided into three sections, which are "S", and the three sections are the upper connecting rod 4b3 and the middle connecting rod respectively. 4b2 and lower connecting rod 4b1.

The lower connecting rod 4b1 is upwardly arranged along the long axis direction of the connecting cylinder 4a, that is, vertically installed, the left connecting edge of the lower connecting rod 4b1 has a length x1 of 11 mm, the right edge length x2 is 12 mm, and the middle connecting rod 4b2 is biased to the left side. , forming an angle of 135° with the lower connecting rod 4b1, that is, the angle A is 135°, the left edge of the middle connecting rod 4b2 is 11 mm long, and the length of the right edge is 10 mm; the upper connecting rod 4b3 is biased to the right side, and The middle connecting rod 4b2 forms an angle of 120°, that is, the angle B is 120°, the left side of the upper connecting rod 4b3 has a length x5 of 6 mm, and the right edge has a length x6 of 4 mm;

(two) measuring head

As shown in FIG. 3, the measuring head is a "convex" shaped ruler, and the second square ruler 1b has a length L1 of 33 mm, a width W1 of 7 mm, a thickness Z1 of 3 mm, and a front face along the length direction (ie, the direction of L1) in mm. The scale is marked for the unit. The surface displayed by the "convex" shaped ruler in Fig. 5 is the front side, that is, the plane α is the front side; the length L2 of the first square rule 1a is 43 mm, the width W2 is 7 mm, and the thickness Z2 is 3 mm. When viewed from the side, the first square rule 1a and the second square rule 1b are on the same plane as the upper connecting rod 4b3 of the connecting rod 4.

The measuring device for opening degree and/or continuous missing tooth gap measurement in the embodiment can be used for measuring the opening degree and the continuous missing tooth gap of the missing tooth when the spatial analysis of the oral implant repair is performed, the function and the use condition and parameters. As shown in the following table:

Table 1 Comparison table of main spatial parameters of dental implants

Specifically, the above measuring device is used as follows:

1) Preoperative intraoral analysis:

(1.1) Measurement of implant operation space:

Conventional implant surgery: The measuring device in the embodiment of the present invention has a scaled side facing forward, and the patient is maximally opened, and the measuring head is erected in the patient to be repaired area, and the maximum opening height of the patient is compared. If the patient has the largest mouth opening, the second square ruler 1b is vertically in contact with the patient to be repaired, and the other end is not blocked by the jaw tooth, indicating that the opening height is greater than 33 mm, the patient's implant operation space meets the requirements for routine implant surgery; otherwise The operation space for implant surgery is insufficient, and patients are not suitable for routine implant surgery.

Digital guide plate implant surgery: The operator holds the measuring device in this embodiment, and the scaled side is facing forward, and the patient is maximally opened, and the measuring head is erected in the patient to be repaired area, and the maximum opening height of the patient is compared. If the patient has the largest mouth opening, the first square ruler 1a is vertically in contact with the patient to be repaired, and the other end is not blocked by the jaw tooth, indicating that the opening height is greater than 43 mm, and the patient's implant operation space meets the requirements for digital guide plate implantation. Otherwise, the patient is not suitable for digital guide plate implantation.

(1.2) Number and position of implants in which multiple teeth are continuously missing. The operator holds the measuring device in this embodiment with the scaled side facing up and the side edge of the second square ruler 1b against the natural tooth. The gap side adjacent surface is measured using the scale of the front of the second square ruler 1b to measure the position of the future implant center. The reference data is as follows: the ideal distance between the center of the implant and the adjacent side of the natural tooth, D=R (implant radius) + 2 mm; the minimum distance between the center of the implant and the adjacent side of the natural tooth near the gap d =R+1.5mm; the minimum distance between the centers of the two implants d ₁₂ = R ₁ + R ₂ + 3 mm.

2) Preoperative model analysis:

Number and location of implants with multiple missing teeth determined: After preparing the patient study model, repeat step (1.2) on the model.

In this embodiment:

By using the measuring device in the embodiment to directly measure the maximum opening degree of the patient, it is possible to easily and accurately determine whether the operating space during the operation is sufficient, and to avoid the consequences of obstruction of the surgical instrument caused by visual misjudgment and inability to operate;

The scale of the end of the second square ruler 1b of the measuring device in the embodiment can perform the comparison of the plurality of missing teeth and the missing tooth gap, and assist the operator in selecting the implant placement position and model.

In summary, the measuring device in the present embodiment realizes a series of intraoral and model analysis of a series of oral implant restoration spaces by a specific shape, structure, and direct comparison of specific portions thereof. Compared with visual inspection or ordinary ruler, the measurement is simpler and more accurate, and the spatial characteristics of the part to be repaired can be measured more efficiently. The design of the implant size, the implantation position and the shape and structure of the upper restoration are provided. in accordance with.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. All modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Measuring device for opening degree and/or continuous missing tooth gap measurement, comprising a connecting rod (4) and a measuring head, the measuring head being located at the upper end of the connecting rod (4), characterized in that the measuring head is "convex" The glyph includes a first square ruler (1a) and a second square ruler (1b), the length of the first square ruler (1a) being greater than the length of the second square ruler (1b), the first square ruler (1a) The lower end is connected to the upper end of the connecting rod (4), and the upper end is connected to the lower end of the second square ruler (1b).
Measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 1, characterized in that the width of the first square ruler (1a) is the same as the width of the second square ruler (1b) .
Measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 1, characterized in that the thickness of the first square ruler (1a) is the same as the thickness of the second square ruler (1b) And the first square ruler (1a) and the second square ruler (1b) are on the same plane.
The measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 1, wherein the two sides of the lower end of the first square ruler (1a) are closest to the second square ruler ( The distances of the sides of 1b) are equal.
Measuring device for opening degree and/or continuous missing tooth gap measurement according to any one of claims 1 to 4, characterized in that the connecting rod (4) comprises an upper connecting rod connected in series from top to bottom ( 4b3), the middle connecting rod (4b2) and the lower connecting rod (4b1), wherein: in the right-angle three-dimensional coordinate system, the lower end of the lower connecting rod (4b1) is placed at the origin o, and the lower connecting rod (4b1) is placed at the y-axis The positive half shaft; the middle connecting rod (4b2) is inclined toward the negative half axis of the z-axis, so that the middle connecting rod (4b2) and the lower connecting rod (4b1) form an angle A in the yz plane; the upper connecting rod (4b3) The lower end is connected to the lower connecting rod (4b1), the upper end is inclined toward the positive half-axis of the z-axis and forms an angle B with the middle connecting rod (4b2).
Measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 5, characterized in that the middle connecting rod (4b2) is also inclined to the positive or negative half-axis of the x-axis at the same time Thus, the middle connecting rod (4b2) and the lower connecting rod (4b1) also form an angle C on the xy plane.
The measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 6, wherein the angle between the angle A and the angle B is 120°-135°, and the angle of the angle C is It is between 120°-180° and not equal to 180°.
A measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 5, characterized in that the angle A is 135° and the angle B is 120°.
Measuring device for opening degree and/or continuous missing tooth gap measurement according to claim 5, characterized in that the connecting rod (4) further comprises a connecting cylinder (4a) and a hexagonal body (4c), The hexagonal body (4c) is connected between the connecting cylinder (4a) and the lower connecting rod (4b1).
Measuring device for opening degree and/or continuous missing tooth gap measurement according to any one of claims 1 to 4, characterized in that the second square ruler (1b) is provided with a scale along the length direction.