CN219332014U - Device for measuring positioning accuracy of toothless jaw guide plate - Google Patents
Device for measuring positioning accuracy of toothless jaw guide plate Download PDFInfo
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- CN219332014U CN219332014U CN202222564313.2U CN202222564313U CN219332014U CN 219332014 U CN219332014 U CN 219332014U CN 202222564313 U CN202222564313 U CN 202222564313U CN 219332014 U CN219332014 U CN 219332014U
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Abstract
The device for measuring the positioning precision of the toothless jaw guide plate comprises a measuring substrate and a plurality of measuring rods, wherein each measuring rod comprises a scanning column and a rod part positioned below the scanning column, and the rod part is positioned at a preset position of a jaw bone of a patient; the measuring base plate is consistent with the tissue surface shape of the implant guide plate without the dental jaw, a measuring hole is formed in the measuring base plate, and the measuring base plate is fixedly arranged on the measuring rod through the measuring hole. According to the device provided by the utility model, the fixed position of the measuring substrate can be accurately restored through the measuring substrate and the measuring rod, so that the positioning precision of the measuring substrate is obtained, the structure is simple, and the problem that the positioning precision of the planting guide plate cannot be effectively measured is solved.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and particularly relates to a device for measuring positioning accuracy of a toothless jaw guide plate.
Background
Along with the rapid development of the implantation technology, the implantation false tooth is gradually selected by the patient with dentition deficiency due to the characteristics of good comfort, high chewing efficiency, long service life and the like.
The problem of gingival atrophy, serious alveolar bone absorption, maxillary sinus gasification, poor relationship among jaws and the like are often accompanied with the dentition deficiency of the toothless jaw patients, and the complexity and difficulty of the traditional implantation repair treatment are increased. And the jaw bone quantity is often insufficient, the number of required implants is large, and the requirement on the implantation position of the implants is high, so that the accurate implantation of the implants is crucial to the success of repair.
With the continuous popularization and development of CBCT, CAD/CAM, 3D printing and other technologies, the application of the digital guide plate in planting is gradually wide. The application of the digital guide plate greatly improves the accuracy of the three-dimensional position of the implant, reduces the surgical trauma and reduces the incidence rate of complications. However, the lack of teeth in the mouth of a toothless patient as a fixed reference mark, the lack of a fixed reference for the positioning of the guide plate, and the inability to determine whether to place in a position consistent with the preoperative position. The digital guide plate is used as a carrier for implantation operation, and the error positioning and offset in the operation can cause global deviation of the implant position, so that the implantation precision is seriously affected.
Therefore, how to improve the positioning accuracy of the guide plate is a problem which is more often studied clinically. However, with respect to the current improved planting technology, the main evaluation index is planting precision. For the positioning accuracy of the guide plate, no effective measuring method exists in clinic, and practical evaluation cannot be made on an improved technology for improving the positioning accuracy.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a device for measuring the positioning accuracy of a toothless jaw guide plate, which can accurately restore the fixed position of a planting guide plate to obtain the positioning accuracy of the planting guide plate, so as to be used as an evaluation index of the application accuracy of the planting guide plate.
The device for measuring the positioning precision of the toothless jaw guide plate comprises a measuring base plate and a plurality of measuring rods, wherein each measuring rod comprises a scanning column and a rod part positioned below the scanning column, and the rod part is positioned at a preset position of a jaw bone of a patient;
the measuring base plate is consistent with the tissue surface shape of the implant guide plate without the dental jaw, a measuring hole is formed in the measuring base plate, and the measuring base plate is fixedly arranged on the measuring rod through the measuring hole.
Further, an indication ball is arranged between the scanning column and the rod part in a connecting way, and the diameter of the indication ball is larger than that of the scanning column;
the diameter of the measuring hole is adapted to the diameter of the indicating ball, and the measuring substrate is fixed on the indicating ball through the measuring hole.
Further, the diameter of the indicator ball is greater than the diameter of the stem.
Further, the measuring base plate and the planting guide plate are provided with the same number of the guide holes for the fixture nails at the same position, and the number of the guide holes for the fixture nails corresponds to the number of the fixture nails.
Further, the measuring substrate is made of a resin material, and the measuring rod is made of a peek material.
Further, the measuring hole is a through hole positioned on the measuring substrate, the rod part is arranged at a preset position of the jawbone of the patient, the indicating ball passes through the measuring hole and is positioned in the mouth, and the measuring substrate is fixed.
Further, the number of the measuring rods is three, one measuring rod is located in the front tooth area, and the other two measuring rods are located in the rear tooth areas on two sides respectively.
Compared with the prior art, the utility model has the following beneficial effects:
1. the measuring substrate and the planting guide plate are generated by the same model, and the tissue surface shape is consistent; the measuring hole is matched and fixed with the measuring rod, the fixed position of the measuring substrate can be accurately restored, the positioning precision of the measuring substrate is obtained, the measuring error is reduced, and the positioning precision of the planting guide plate is further obtained.
2. The measuring rod is of an integral design, can be stored in the mouth for a period of time in the manufacturing process of the planting guide plate, does not influence the use of the false tooth, and can resist the action of external force and does not shift.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
FIG. 1 is a schematic diagram of a device for measuring the positioning accuracy of a toothless jaw guide in an embodiment of the utility model;
FIG. 2 is a schematic view of a measuring rod according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a measurement substrate according to an embodiment of the present utility model;
reference numerals in the drawings:
100-jawbone of patient; 200-measuring rod;
1-scanning a column; 2-an indicator ball; 3-a stem; 4-tip; 5-measuring holes; 6-measuring the substrate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 3, the device for measuring the positioning accuracy of the toothless jaw guide comprises a measuring base plate and a plurality of measuring rods, wherein each measuring rod comprises a scanning column 1 and a rod part 3 positioned below the scanning column 1, and the rod part 3 is placed at a preset position of a jaw bone 100 of a patient; the measuring base plate is consistent with the tissue surface shape of the implant guide plate without the dental jaw, a measuring hole 5 is formed in the measuring base plate, and the measuring base plate is fixedly arranged on the measuring rod through the measuring hole 5.
In the utility model, the measuring rod can be stably placed in the jawbone 100 of a patient through the rod part 3, and can be stored in the mouth for a period of time until the implantation guide plate is completed. The upper structure scanning column of the measuring rod is short, small and round, the use of the original false teeth of a patient is not affected, the false teeth are not affected by chewing external force to shift, the upper surface structure is smooth, the cleaning is easy, and the oral hygiene is maintained.
The measuring substrate 6 and the planting guide plate are generated by the same model, the tissue surface shape is consistent, and the measuring substrate is matched with the measuring rod, so that the measuring substrate is arranged on the measuring rod and fixed in a jaw oral cavity to carry out intraoral scanning, the actual position of the planting guide plate is accurately reduced, and the positioning precision of the measuring substrate is further obtained.
The measuring substrate 6 can be made of a resin material, the measuring rod is made of a peek material, the strength is good, and meanwhile, the scanning column is made of the peek material, so that the scanning and identification are facilitated.
In an alternative embodiment, an indicator ball 2 is connected between the scanning column 1 and the rod 3, and the diameter of the indicator ball 2 is larger than that of the scanning column 1; the diameter of the measuring hole 5 is adapted to the diameter of the indicator ball 2, and the measuring substrate is fixed on the indicator ball 2 through the measuring hole 5.
The diameter of the indicator ball 2 is greater than the diameter of the stem 3.
In this embodiment, the indicator ball 2 is of spherical configuration, located between the scanning column 1 and the shaft 3, and is larger than the diameters of the scanning column 1 and the shaft 3. And the internal shape and the diameter of the measuring hole are matched with the diameter of the indicating ball, namely the internal diameter of the measuring hole is equal to the diameter of the indicating ball. In this way, the measuring substrate 6 can be clamped on the indicator ball 2 through the measuring hole 5, which is more beneficial to stabilizing, calibrating and positioning the measuring substrate 6.
The width of the scanning column 1 can be 2mm, the height can be 4mm, the diameter of the indication ball 2 can be 3mm, the height of the rod portion 3 can be 2-3mm, the bottom end of the rod portion is provided with a tip 4 with threads, and the tip 4 can be placed in a jawbone more firmly. The tip 4 is generally 4mm long and is not greatly affected by the bone height of the bone mass, and of course, the length of each part of the measuring rod can be adjusted according to the planting scheme. The measuring rod can be manufactured according to the unified specification, is produced in batches, has wide application range and convenient use, and can be reused after disinfection. The rod part is a gum penetrating part, and the thickness of the mucous membrane of a patient without a tooth jaw is generally 2-3mm, so that the rod part can be well adapted to mucous membrane tissues.
The scanning column 1 of the measuring rod has a regular shape, such as a cylinder, a prism, a cone and the like, is beneficial to the identification and registration of intraoral scanning and is convenient for scanning and marking positions. The diameter of the measuring rod is smaller, and the design of the planting site is not affected.
In general, the number of the measuring rods is 3, one measuring rod is positioned in the front tooth area, and the other two measuring rods are respectively positioned in the rear tooth areas at two sides. The measuring rod is generally designed to be distributed at three dispersed points in the mouth, the triangular distribution and the dispersion design are stable, the measuring substrate 6 can be stably retained, and the positioning precision can be accurately measured.
In the utility model, the measuring substrate 6 and the planting guide plate are both generated by the same model, the tissue surface of the measuring substrate 6 is consistent with the planting guide plate, the measuring substrate 6 is assisted to be in place by the indicating ball 2, the tissue surface of the measuring substrate 6 is attached to the alveolar ridge, and the same actual fixed position of the measuring substrate 6 and the planting guide plate can be ensured, so that the accurate positioning precision of the planting guide plate is obtained.
In one embodiment, as shown in fig. 3, the measuring hole 5 is a through hole formed on the measuring base plate, the stem 3 is placed at a predetermined position of the jawbone of the patient, and the indicator ball 2 is placed in the mouth through the measuring hole 5 to fix the measuring base plate.
The scanning column 1 stretches out of the upper surface of the measuring substrate, so that data matching is facilitated after intraoral scanning, and the marking position is easier to find.
In order to further confirm that the measuring substrate can restore the actual fixed position of the planting guide plate, the measuring substrate and the planting guide plate are provided with the same number of the guide holes of the fixture nails at the same position, and the number of the guide holes of the fixture nails corresponds to the number of the fixture nails so as to further fix the measuring substrate and accurately restore the actual fixed position of the planting guide plate.
The cheek side of the measuring substrate is provided with the guide holes of the retention nails at the same position on the planting guide plate, the positions and the axial directions of the retention nails can be determined, when the cheek side is scanned in the mouth, the positions of the measuring substrate can be completely fixed by the retention nails, the actual positions of the measuring substrate can be recorded accurately, the measuring substrate and the planting guide plate have the same tissue surface and the retention nails, and the positions of the planting guide plate can be restored better.
To further introduce and describe the effect of the device for measuring the positioning accuracy of the toothless guide plate, the following specific process for measuring the positioning accuracy of the toothless guide plate is supplemented:
and 001, manufacturing a measuring rod with a threaded tip, and stably placing the measuring rod in a jawbone.
Step 002, shooting a first CBCT (Cone beam CT for short), evaluating the bone mass according to the first CBCT data, and determining a preoperative planting scheme and the distribution position of the measuring rod according to the anatomical condition.
Step 003, placing a measuring rod at a preset position, shooting a second CBCT, simultaneously preparing an intraoral impression of a patient, obtaining an intraoral model with measuring rod information, wax-type tooth arrangement, and scanning the intraoral model with measuring rod information and tooth arrangement information.
And 004, integrating the CBCT data of the second time, the intraoral model with the measuring rod information and the tooth arrangement information, establishing a virtual patient model, wherein the generated virtual patient model has jaw bone and mucous membrane information and the like.
The measuring rod is implanted in the preoperative portal and used as an intraoral fixed mark point to take part in shooting a second CBCT and intraoral scanning, and assist CT and intraoral scanning registration. During the manufacture of the measuring base plate and the implantation guide plate, the measuring rod remains in the mouth, and the measuring base plate is worn in an auxiliary way during operation. The measuring rod can be stored in the mouth for about one week, and the position is kept until the operation is finished.
And 005, generating a measuring substrate model and a planting guide plate model on the basis of the virtual patient model, and preparing the measuring substrate and the planting guide plate.
The measuring base plate and the planting guide plate have the same tissue surface morphology, the measuring base plate and the planting guide plate are provided with the same number of fixing nail guide holes at the same position, and the number of the fixing nail guide holes corresponds to the number of the fixing nails.
The implant guide plate is also provided with implant guide holes, the number of the implant guide holes corresponds to the number of the implants, and the shape and the size of the implant guide holes correspond to the types of the implants.
Step 006, placing a measuring substrate in the oral cavity of a patient, wherein measuring holes of the measuring substrate correspond to the indicating balls one by one, completely positioning the measuring substrate, attaching the tissue surface of the measuring substrate to the alveolar ridge form, and driving the retaining nails according to the retaining nail guide holes of the measuring substrate, so that the measuring substrate is fixed.
And 007, carrying out intraoral scanning on the measuring substrate and the measuring rod by using an intraoral scanner, and mainly scanning the measuring rod and a measuring hole area of the measuring substrate to obtain the actual fixed position of the measuring substrate in operation.
And 008, taking down the measuring substrate and the measuring rod, placing the planting guide plate, and inserting the retention nails at the positions of the retention nail guide holes of the planting guide plate.
Step 009, preparing holes and implanting the implant, and shooting a third CBCT after operation.
Step 010, matching the intraoral scanning data of the intraoperative measuring substrate with the preoperatively generated measuring substrate model through measuring the surface characteristic points of the substrate to obtain a complete intraoperative measuring substrate model;
registering the complete intraoperative measurement substrate model to the virtual patient model by taking a measurement rod of the measurement substrate as a registration mark to obtain a virtual patient model with the complete intraoperative actual fixed position information of the measurement substrate;
registering the virtual patient model with the complete measurement substrate intraoperative actual fixed position information with the virtual patient model with the preoperative measurement substrate model through the jawbone mark points, detecting the position deviation between the intraoperative actual fixed position of the measurement substrate and the preoperative measurement substrate model, and obtaining the positioning precision of the measurement substrate.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements may be made to the present application by those skilled in the art, which modifications and equivalents are also considered to be within the scope of the present application.
Claims (7)
1. The device for measuring the positioning accuracy of the toothless jaw guide plate is characterized by comprising a measuring base plate and a plurality of measuring rods, wherein each measuring rod comprises a scanning column (1) and a rod part (3) positioned below the scanning column (1), and the rod part (3) is positioned at a preset position of a jaw bone of a patient;
the measuring base plate is consistent with the tissue surface shape of the implant guide plate without the dental jaw, a measuring hole (5) is formed in the measuring base plate, and the measuring base plate is fixedly arranged on the measuring rod through the measuring hole (5).
2. The apparatus for measuring the positioning accuracy of a toothless guide as claimed in claim 1, wherein,
an indication ball (2) is connected between the scanning column (1) and the rod part (3), and the diameter of the indication ball (2) is larger than that of the scanning column (1);
the diameter of the measuring hole (5) is adapted to the diameter of the indicating ball (2), and the measuring substrate is fixed on the indicating ball (2) through the measuring hole (5).
3. The apparatus for measuring the positioning accuracy of a toothless guide as claimed in claim 2, wherein,
the diameter of the indicating ball (2) is larger than the diameter of the rod part (3).
4. The apparatus for measuring the positioning accuracy of a toothless guide as claimed in claim 1, wherein,
the measuring base plate and the planting guide plate are provided with the same number of guide holes for the fixture nails at the same position, and the number of the guide holes for the fixture nails corresponds to the number of the fixture nails.
5. The apparatus for measuring the positioning accuracy of a toothless guide as claimed in claim 1, wherein,
the measuring substrate is made of resin materials, and the measuring rod is made of peek materials.
6. The apparatus for measuring the positioning accuracy of a toothless guide as claimed in claim 2 or 3, wherein,
the measuring hole (5) is a through hole positioned on the measuring substrate, the rod part (3) is arranged at a preset position of the jawbone of the patient, and the indicating ball (2) passes through the measuring hole (5) and is positioned in the mouth so as to fix the measuring substrate.
7. The apparatus for measuring the positioning accuracy of a toothless guide as claimed in claim 1, wherein,
the number of the measuring rods is three, one measuring rod is positioned in the front tooth area, and the other two measuring rods are respectively positioned in the rear tooth areas on two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222564313.2U CN219332014U (en) | 2022-09-27 | 2022-09-27 | Device for measuring positioning accuracy of toothless jaw guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222564313.2U CN219332014U (en) | 2022-09-27 | 2022-09-27 | Device for measuring positioning accuracy of toothless jaw guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219332014U true CN219332014U (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222564313.2U Active CN219332014U (en) | 2022-09-27 | 2022-09-27 | Device for measuring positioning accuracy of toothless jaw guide plate |
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| CN (1) | CN219332014U (en) |
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- 2022-09-27 CN CN202222564313.2U patent/CN219332014U/en active Active
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