CN114391991A - Processing method and processing tool of dental implant - Google Patents

Abstract

The application provides a processing method and a processing tool for a dental implant, wherein the processing method for the dental implant includes: clamping the side wall of the semi-finished embryo body of the dental implant; The connecting cavity of the abutment; the processing tool is inserted into the connecting cavity, and the relative position of the semi-finished dental implant and the processing tool is locked; the processing tool is clamped and the external shape of the dental implant neck is processed to obtain the finished dental implant. Using this method to process semi-finished dental implants can effectively overcome the problem of insufficient machining accuracy of 3D printed titanium and titanium alloy dental implants at the connection interface of the neck abutment, and ensure the tightness of the connection between the dental implant and the abutment. and structural mechanical stability, thus meeting the precision requirements of dental implant systems.

Description

Processing method and processing tool of dental implant

technical field

The present application relates to the technical field of 3D printing dental implants, and in particular, to a processing method and a processing tool for dental implants.

Background technique

Oral implant technology is an advanced and mature technical means for the restoration of missing teeth. It is technically superior to traditional methods and is considered to be the first choice for restoration of missing teeth. This has initially formed an expert consensus in the industry. It has been rapidly popularized and widely used. As a core product of oral implant technology, dental implants have been used in millions of years in my country, and the annual growth rate is 20%-30%, showing huge market demand and broad development space. At present, the mainstream dental implant system is composed of two parts. The dental implant is implanted in the alveolar bone to support the edentulous restoration, and the abutment is used to fix the missing tooth at the upper end. The tight connection constitutes a complete dental implant restoration system. Titanium and titanium alloys are the materials of choice for dental implant systems, and the current production method is dominated by traditional subtractive machining methods.

With the development and progress of 3D printing technology in recent years, its potential advantages in the processing and production of medical products have gradually attracted widespread attention in the industry. Compared with traditional machining methods, 3D printing technology has the advantages of high processing efficiency, saving raw materials, and meeting the needs of personalized shape processing. There are more and more research reports in various medical fields. In the processing and manufacturing of dental implants, scholars have successively launched technical explorations. One of the important research and development ideas is to use the technical characteristics of 3D printing technology to build a rough and porous structure on the surface of the implant, thereby improving the bonding strength between the implant and the alveolar bone. However, to evaluate the product quality and technical level of a dental implant, in addition to the combination characteristics of the implant and bone tissue, the tightness and structural stability of the connection between the implant and the abutment is an important indicator, which directly affects the dental implant. The long-term biological and mechanical stability of the implant determines the treatment effect and the occurrence of complications. According to the national pharmaceutical industry standard requirements of "Titanium and Titanium Alloy Dental Implants" (YY0315-2016), the geometrical dimension tolerance of each component of dental implants is +-0.2mm, and the matching gap between the implant and the abutment should be <=0.035mm ; For the mainstream form of internal taper connection, the internal connection interface between the dental implant and the abutment should cooperate well, and the taper deviation should not be greater than +-3% of the taper value provided by the manufacturer (ie, the design value in the drawing). At present, the machining accuracy of titanium alloy laser sintering 3D printing can reach 80 microns. Although it can meet the national industry standard for the dimensional error of dental implants, such machining accuracy cannot meet the tolerance requirements at the interface of the upper end abutment of the implant. Therefore, the problem of accuracy has become a technical bottleneck restricting the application of 3D printing technology in the production and processing of dental implants, and no research reports on related solutions have been seen so far.

It can be seen that solving the problem of precision machining at the connection interface of the upper abutment of the dental implant is a key technical link in determining the 3D printing of dental implants.

SUMMARY OF THE INVENTION

The present application provides a processing method of a dental implant, which is used to ensure the tightness and structural mechanical stability of the connection between the dental implant and the abutment, thereby meeting the precision requirements of the dental implant system. Methods include:

Holds the side wall of the semi-finished embryo body of the dental implant;

Process the top shape of the embryo body to obtain a connecting cavity for connecting the abutment;

Probe the processing tool into the connecting cavity, and lock the relative position of the semi-finished dental implant and the processing tool;

The processing tool is clamped and the external shape of the dental implant neck is processed to obtain a finished dental implant product.

In a specific implementation, the semi-finished product of the dental implant includes a body and an embryo, wherein:

The outer side of the main body is provided with a thread for connecting the alveolar bone, and the embryonic body is arranged on the top of the main body.

In a specific implementation, before the side wall of the semi-finished embryo body of the dental implant is clamped, it further includes:

The neck shape of the semi-finished dental implant is processed by 3D printing equipment to obtain a cylindrical embryo body for clamping.

In the specific implementation, the process of inserting the processing tool into the connecting cavity and locking the relative position of the semi-finished dental implant and the processing tool further includes:

Insert the fixing mechanism of the processing tool into the interior of the connection cavity;

Screw the connecting bolts into the screw holes of the fixing mechanism and the inside of the connecting cavity in turn;

Tighten the connecting bolt to connect the fixing mechanism to the top of the semi-finished dental implant.

In a specific implementation, the side wall of the connection cavity is provided with a plurality of grooves for anti-rotation.

In a specific implementation, the top shape of the embryo body is processed to obtain a connecting cavity for connecting the base, further comprising:

The shape of the top of the embryo body is processed by subtractive machining to obtain a connecting cavity for connecting the abutment.

In a specific implementation, the top shape of the embryo body is processed to obtain a connecting cavity for connecting the base, further comprising:

Turn the top of the embryo to obtain a conical cavity;

Punch the conical cavity, and set a plurality of grooves along the axial direction on the side wall of the conical cavity;

Threads are milled into the bottom of the tapered cavity to obtain the connecting cavity for the abutment.

In a specific implementation, the processing tool and the external shape of the dental implant are processed to obtain a finished product of the dental implant, further comprising:

The fixed part is clamped and the external form of the dental implant is processed by a material reduction machining device to obtain a finished dental implant.

In a specific implementation, the embryo body is a cylindrical embryo body, and the diameter of the cylindrical embryo body is 2 mm to 6 mm larger than the diameter of the dental implant body; or, the embryo body is a square cylindrical embryo body, so The side length of the square columnar embryo body is greater than the diameter of the dental implant body by 2 mm to 6 mm.

In a specific implementation, the height of the cylindrical embryo body is greater than 3 mm.

The application also provides a processing tool for dental implants, characterized in that the processing tool for dental implants includes a fixing mechanism and a connecting bolt, wherein:

The fixing mechanism has a screw hole arranged through the axial direction, and the bottom end has a boss that fits with the connection cavity of the top of the dental implant;

The connecting bolt can pass through the fixing mechanism along the screw hole and be screwed into the connecting cavity, so as to bolt the fixing mechanism to the semi-finished product for clamping the dental implant.

In a specific implementation, both the boss and the connection cavity are arranged in a Morse taper.

In a specific implementation, the side wall of the boss has a plurality of protruding parts arranged in the axial direction, so as to prevent the boss from moving circumferentially in the connection cavity.

The processing method of a dental implant provided by the present application includes: clamping the side wall of the semi-finished embryo body of the dental implant; processing the top shape of the embryo body to obtain a connecting cavity for connecting the abutment; inserting the processing tool into the connecting cavity, The relative position of the semi-finished dental implant and the processing tool is locked; the processing tool is clamped and the external shape of the neck of the dental implant is processed to obtain a finished dental implant. The processing method of the dental implant can effectively overcome the problem of insufficient machining accuracy of the 3D printed titanium and titanium alloy dental implants at the connection interface of the neck abutment, and ensure the tightness and structural mechanical stability of the connection between the dental implant and the abutment It can meet the precision requirements of dental implant systems. The processing tool of the dental implant provided by the present application can be connected to the interior of the connecting cavity on the top of the dental implant, and the dental implant body does not need to be clamped during the processing, so it can effectively overcome the secondary machining process of the 3D printed dental implant. Clamping can damage the surface structure of the implant, avoid the impact of the processing process on the dental implant part, ensure the precision of the dental implant neck material reduction processing, and realize the standardized batch production of products.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. The drawings are only some specific embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

1 is a schematic flowchart of a method for processing a dental implant according to a specific embodiment of the present application;

2 is a schematic diagram of the installation process of a dental implant processing tool according to a specific embodiment of the present application;

3 is a schematic diagram of a specific flow of processing a connection cavity according to a specific embodiment of the present application;

4 is a schematic diagram of the connection structure between a dental implant processing tool and a dental implant according to a specific embodiment of the present application;

5 is a schematic structural diagram of a fixing mechanism according to a specific embodiment of the present application;

6 is a schematic structural diagram of a connecting bolt according to a specific embodiment of the present application;

7 is a schematic structural diagram of a semi-finished product of a dental implant according to a specific embodiment of the present application;

8 is a schematic structural diagram of a semi-finished dental implant having a connecting cavity according to a specific embodiment of the present application;

FIG. 9 is a schematic structural diagram of a finished dental implant according to a specific embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the specific embodiments of the present application more clearly understood, the specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present application and their descriptions are used to explain the present application, but are not intended to limit the present application.

As shown in Fig. 1, Fig. 4, Fig. 7, Fig. 8 and Fig. 9, the present application provides a processing method of a dental implant to ensure the tightness and structural mechanical stability of the connection between the dental implant and the abutment , and then meet the precision requirements of the dental implant system, and the processing method of the dental implant includes:

102: clamping the side wall of the semi-finished dental implant 430A embryo body 431;

103: Process the top shape of the embryo body 431 to obtain a connecting cavity 433 for connecting the base;

104: Probe the processing tool into the connecting cavity 433, and lock the relative position of the semi-finished product 430A of the dental implant and the processing tool;

105: Clamp the processing tool and process the external shape of the dental implant neck to obtain a finished dental implant 430C.

In the specific implementation, the processing equipment processes the gingival part of the semi-finished dental implant 430A by supporting the processing tool, that is, removes the excess surface roughness of the embryo body 431 of the semi-finished dental implant 430A, and ensures a certain roughness by machining. , to guide the gingiva and the gingival part of the dental implant to form a biologically closed space.

In a specific implementation, the structure of the semi-finished product 430A of the dental implant can have various embodiments during the setting. For example, as shown in FIG. 7 , the semi-finished dental implant 430A may include a main body 432 and an embryonic body 431 , wherein: the outer side of the main body 432 is provided with a thread for connecting the alveolar bone, and the embryonic body 431 is disposed on the the top of the body 432.

In the specific implementation, in the step 102: before clamping the side wall of the semi-finished embryo body of the dental implant, it further includes:

101: Use 3D printing equipment to process the neck shape of the semi-finished dental implant to obtain a cylindrical embryo body for clamping.

In the specific implementation, in the step 103: processing the top shape of the embryo body 431, after obtaining the connecting cavity 433 for connecting the abutment, as shown in FIG. Therefore, it can be fixed by processing tooling, so as to complete the subsequent processing steps.

In specific implementation, there may be various embodiments for the fixation of the processing tool and the dental implant. For example, in order to ensure the stability of the connection and also facilitate the operation, the step 104: probe the processing tool into the connection cavity 433, and lock the relative position of the semi-finished dental implant 430A and the processing tool, as shown in FIG. 2, may further include: :

201: Insert the fixing mechanism 410 of the processing tool into the interior of the connection cavity 433;

202: Screw the connecting bolts 420 into the screw holes 411 of the fixing mechanism 410 and the inside of the connecting cavity 433 in sequence;

203: Tighten the connecting bolts 420 to connect the fixing mechanism 410 to the top of the semi-finished dental implant 430A.

In a specific implementation, the side wall of the connection cavity 433 may be provided with a plurality of grooves 434 for anti-rotation.

In a specific implementation, there may be various embodiments for the selection of equipment for processing the top shape of the embryo body 431 . For example, the step 104: processing the top shape of the embryo body 431 to obtain the connecting cavity 433 for connecting the abutment may further include: processing the shape of the top of the embryo body 431 by using a material reduction machining equipment to obtain the connecting cavity 433 for connecting the abutment connection cavity 433. Specifically, CNC machining equipment can be used to process the top shape of the embryo body 431, and a connecting cavity 433 for connecting the base can also be obtained.

In the specific implementation, various embodiments can be adopted for processing the top shape of the embryo body 431. For example, in order to ensure the processing accuracy and further improve the processing efficiency, the step 104: process the top shape of the embryo body 431 to obtain a base for connecting The connection cavity 433 of the stage, as shown in FIG. 3, may further include:

301: turning the top of the embryo body 431 to obtain a conical cavity;

302: Punch the conical cavity, and set a plurality of grooves 434 on the side wall of the conical cavity along the axial direction;

303: Milling threads at the bottom of the conical cavity to obtain a connecting cavity 433 for connecting the abutment.

In the specific implementation, various embodiments can also be adopted for the treatment of the external shape of the dental implant. For example, the step 105: processing the tooling and processing the external shape of the dental implant to obtain a finished product 430C of the dental implant, which may further include:

The fixed part is clamped and the external form of the dental implant is processed by means of a material reduction machining device to obtain a finished dental implant 430C.

In a specific implementation, there may be various embodiments for the configuration of the shape of the embryo body 431 . For example, because the cylindrical structure is conducive to mechanical support, it can ensure high coaxiality between the machined cavity and the outer diameter, and can ensure the stability of mechanical properties without stress concentration. Therefore, as shown in Figure 7, the The embryo body 431 can be a cylindrical embryo body. Further, since the top diameter of the finished dental implant 430C needs to be slightly larger than the body 432, the diameter of the cylindrical embryo body is larger than that of the dental implant body 432 by two millimeters to two millimeters. six mm. Further, the circular embryo body can be formed by 3D printing, thereby effectively ensuring the shape of the cylindrical embryo body, thereby improving the accuracy and efficiency of subsequent processing. For another example, the embryonic body 431 may also be a polygonal cylindrical embryonic body, and the inner diameter of the polygonal cylindrical embryonic body is two to six millimeters larger than the diameter 432 of the dental implant body. In addition, the polygonal embryo body can also be formed by 3D printing, so as to effectively ensure the shape of the polygonal embryo body, thereby improving the accuracy and efficiency of subsequent processing; further, the polygonal columnar embryo body can also be a square columnar embryo body, The side length of the square columnar embryo body is larger than that of the dental implant body 432 by two to six millimeters.

Further, the height of the cylindrical embryo body can be set in various embodiments. For example, in order to save materials and improve processing efficiency while effectively ensuring the accuracy of the finished product 430C, the height of the cylindrical body 431 is greater than 3 mm.

As shown in Figure 4, Figure 5 and Figure 6, the present application also provides a processing tool for dental implants, characterized in that the processing tool for dental implants includes a fixing mechanism 410 and a connecting bolt 420, wherein:

The fixing mechanism 410 has a screw hole 411 disposed through the axial direction, and the bottom end has a boss 411 that fits with the connection cavity 433 on the top of the dental implant;

The connecting bolts 420 can pass through the fixing mechanism 410 along the screw holes 411 and be screwed into the connecting cavity 433 , so as to bolt the fixing mechanism 410 to the clamping dental implant semi-finished product 430A.

The processing tool can be effectively fixed to the connecting cavity 433 by bolts, the installation is relatively simple, the positioning is accurate, and large-scale industrial production can be realized, and the mechanical precision and roughness are guaranteed, which can meet the needs of clinical use.

In a specific implementation, the configuration of the shape of the boss 411 may have various implementations. For example, the boss 411 and the connection cavity 433 may be arranged as parallel walls. For another example, the applicant considers that due to the small taper of the Morse taper, a certain torque can be transmitted by using the principle of friction, and because it is a taper fit, disassembly is more convenient. Within a certain range of the same taper, the workpiece can be disassembled and assembled freely without affecting the use effect during work. Therefore, both the boss 411 and the connection cavity 433 may be arranged in a Morse taper.

Next, the Morse taper of the boss 413 at the lower end of the fixing mechanism 420 is matched with the connecting cavity 433 of the dental implant, the fixing mechanism 420 is inserted into the connecting cavity 433 in the dental implant, and then the connecting bolt 430 is fixed in the body 420 by tightening the connecting bolt The tail of 430 can be closely connected with the dental implant to form a whole, which is convenient for clamping.

In specific implementation, the sidewalls of the bosses 411 may have various embodiments when they are disposed. For example, the side wall of the boss 411 may have a plurality of protruding parts 413 arranged in the axial direction, so as to prevent the boss 411 from moving circumferentially in the connecting cavity 433 . After the protruding portion 413 enters the interior of the connecting cavity 433 along with the boss 411 , it can be effectively clamped to the corresponding groove 434 so as to be relatively fixed to the connecting cavity 433 in the circumferential direction.

To sum up, the processing method of the dental implant provided by the present application includes: clamping the side wall of the embryo body 431 of the semi-finished product 430A of the dental implant; processing the top shape of the embryo body 431 to obtain the connecting cavity 433 for connecting the abutment Probe the processing tool into the connecting cavity 433, and lock the relative position of the semi-finished dental implant 430A and the processing tool; clamp the processing tool and process the external shape of the dental implant neck to obtain the dental implant finished product 430C. The processing method of the dental implant can effectively overcome the problem of insufficient machining accuracy of the 3D printed titanium and titanium alloy dental implants at the connection interface of the neck abutment, and ensure the tightness and structural mechanical stability of the connection between the dental implant and the abutment It can meet the precision requirements of dental implant systems. The processing tool of the dental implant provided by the present application can be connected to the interior of the connecting cavity 433 on the top of the dental implant, and the dental implant body 432 does not need to be clamped during the processing, so it can effectively overcome the secondary machining of the 3D printed dental implant. In the process of clamping, the damage to the surface structure of the implant is avoided, the influence of the processing process on the dental implant part is avoided, the precision of the dental implant neck material reduction processing is ensured, and the standardized batch production of products is realized.

It should be understood that the terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the examples of this application and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise, "a plurality" Generally, at least two kinds are included, but the case of including at least one kind is not excluded.

It should be understood that the term "and/or" used in this document is only an association relationship to describe the associated objects, indicating that there may be three kinds of relationships, for example, A and/or B, which may indicate that A exists alone, and A and B exist at the same time. B, there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used to describe certain components in the embodiments of the present application, these components should not be limited only by these terms. These terms are only used to distinguish components from each other. For example, without departing from the scope of the embodiments of the present application, the first XX component may also be referred to as the second XX component, and similarly, the second XX component may also be referred to as the first XX component.

In the embodiments of the present application, "substantially equal to", "substantially perpendicular to", "substantially symmetrical", etc. means that the macroscopic size or relative positional relationship between the two features referred to is very close to the stated relationship. However, it is clear to those skilled in the art that due to the existence of objective factors such as errors and tolerances, it is difficult for the positional relationship of objects to be properly constrained on a small scale or even a microscopic angle. Therefore, even if there is a slight error in the size and positional relationship between the two, it will not have a great impact on the realization of the technical effect of the present application.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a commodity or system comprising a list of elements includes not only those elements, but also includes not explicitly listed other elements, or elements inherent to the commodity or system. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the article or system that includes the element.

In the above-described embodiments, although the above-described methods are illustrated and described as a series of actions for simplicity of explanation, those of ordinary skill in the art will understand and appreciate that these methods are not limited by the order of the actions, because according to In one or more embodiments, some acts may occur in a different order and/or concurrently with other acts from or not illustrated and described herein but which may be understood by those skilled in the art.

Finally, it should be noted that those skilled in the art can understand that, in order to make the reader better understand the present application, the embodiments of the present application provide many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned embodiments, the technical solutions claimed in the claims of the present application can be basically realized. Therefore, in practical application, various changes in form and details of the above-described embodiments may be made without departing from the spirit and scope of the present application.

Claims (13)

1. A method for processing a dental implant, the method comprising:

clamping the side wall of the semi-finished blank of the dental implant;

processing the top form of the blank body to obtain a connecting cavity for connecting the base station;

a processing tool is inserted into the connecting cavity, and the relative position of the semi-finished dental implant product and the processing tool is locked;

and clamping the processing tool and processing the external shape of the neck of the dental implant to obtain a finished dental implant product.

2. The method of manufacturing a dental implant according to claim 1, wherein the semi-finished dental implant comprises a body and a blank, wherein:

the outer side of the body is provided with threads used for connecting an alveolar bone, and the blank body is arranged at the top of the body.

3. The method of manufacturing a dental implant according to claim 1, further comprising, before said holding the lateral wall of the semi-finished blank of the dental implant:

and processing the neck shape of the semi-finished dental implant product by using 3D printing equipment to obtain a cylindrical blank for clamping.

4. The method of machining a dental implant of claim 1, wherein said advancing a machining tool into the connecting cavity and locking the relative position of the semi-finished dental implant and the machining tool further comprises:

a fixing mechanism of the processing tool is inserted into the connecting cavity;

screwing the connecting bolt into the screw hole of the fixing mechanism and the inside of the connecting cavity in sequence;

the connecting bolt is screwed to connect the fixture to the top of the semi-finished dental implant.

5. The method of manufacturing a dental implant according to claim 1, wherein the side wall of the connection chamber is provided with a plurality of grooves for anti-rotation.

6. The method of manufacturing a dental implant according to claim 1, wherein the step of treating the top form of the blank to obtain a connecting cavity for connecting to an abutment further comprises:

and processing the shape of the top of the blank by using material reducing machining equipment to obtain a connecting cavity for connecting the base station.

7. The method of manufacturing a dental implant according to claim 1, wherein the step of treating the top form of the blank to obtain a connecting cavity for connecting to an abutment further comprises:

turning the top of the blank to obtain a conical cavity;

stamping a conical cavity, wherein a plurality of grooves are axially formed in the side wall of the conical cavity;

and milling threads at the bottom of the conical cavity to obtain a connecting cavity for connecting the base station.

8. The method of processing a dental implant of claim 1, wherein the processing tool and the processing of the external form of the dental implant to obtain a finished dental implant further comprises:

and clamping the fixing part and processing the external form of the dental implant by using material reducing machining equipment to obtain a finished dental implant product.

9. The method of manufacturing a dental implant according to claim 1, wherein the blank is a cylindrical blank having a diameter 2mm to 6 mm larger than the diameter of the dental implant body; or the blank body is a square cylindrical blank body, and the side length of the square cylindrical blank body is 2mm to 6 mm larger than the diameter of the dental implant body.

10. The method of manufacturing a dental implant according to claim 9, wherein the height of the cylindrical blank is greater than 3 mm.

11. The utility model provides a processing frock of dental implant, a serial communication port, dental implant's processing frock includes fixed establishment and connecting bolt, wherein:

the fixing mechanism is provided with a screw hole which is arranged in a penetrating way along the axial direction, and the bottom end of the fixing mechanism is provided with a boss which is matched with the connecting cavity at the top of the dental implant;

the connecting bolt can penetrate through the fixing mechanism along the screw hole and is screwed into the connecting cavity, so that the fixing mechanism is connected to the semi-finished product of the clamped dental implant through the bolt.

12. The tooling of claim 11 wherein the boss and the connecting cavity are both provided with a morse taper.

13. The tooling of claim 11 wherein the side wall of the boss has a plurality of axially disposed projections to prevent circumferential movement of the boss within the connecting cavity.

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