阅读说明：本技术 种植固定桥接口精加工方法 (Finish machining method for planting fixed bridge connector ) 是由 张锦阳 张潇 彭方昭 陈贤帅 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种种植固定桥接口精加工方法,包括：获取患者的口腔扫描数据；根据口腔扫描数据设计种植固定桥三维模型；以任意一个接口为基准接口,以基准接口为原点建立加工坐标系；基于加工坐标系编写种植固定桥三维模型的本体切削加工程序、编写每个接口的接口切削加工程序；将金属盘料装夹于切削加工设备中,切削加工设备调取本体切削加工程序,形成种植固定桥本体；切削加工设备调取所有接口切削加工程序,形成多个种植固定桥接口。本发明的种植固定桥接口精加工方法,有助于提高种植固定桥本体上各个种植固定桥接口之间的位置精度,从而提高种植固定桥接口与固位体配合接口的装配精度。本发明可应用于牙科假体的制造领域中。(The invention discloses a finish machining method for a planting fixed bridge connector, which comprises the following steps: acquiring oral scanning data of a patient; designing a three-dimensional model of the planting fixing bridge according to oral scanning data; establishing a machining coordinate system by taking any one interface as a reference interface and taking the reference interface as an origin; writing a body cutting program of the three-dimensional model of the planting fixed bridge and writing an interface cutting program of each interface based on a machining coordinate system; clamping the metal plate material in cutting processing equipment, and calling a body cutting processing program by the cutting processing equipment to form a planting fixed bridge body; and the cutting processing equipment calls all interface cutting processing programs to form a plurality of planting fixed bridge interfaces. The fine machining method for the planting fixing bridge interfaces is beneficial to improving the position precision between the planting fixing bridge interfaces on the planting fixing bridge body, so that the assembling precision of the planting fixing bridge interfaces and the retainer matching interfaces is improved. The invention can be applied in the field of the manufacture of dental prostheses.)

1. A finish machining method for a planting fixed bridge connector is characterized by comprising the following steps: the method comprises the following steps:

a. acquiring oral scanning data of a patient;

b. designing a three-dimensional model of a fixed planting bridge according to the oral scanning data, wherein the three-dimensional model of the fixed planting bridge is provided with a plurality of interfaces, and all the interfaces are distributed at intervals;

c. establishing a processing coordinate system by taking any one of the interfaces as a reference interface and taking an intersection point of an axis of the reference interface and the end face as an origin;

d. writing a body cutting program of the three-dimensional model of the planting fixed bridge based on the machining coordinate system, writing an interface cutting program of each interface based on the machining coordinate system, and importing the body cutting program and all the interface cutting programs into cutting equipment;

e. clamping the metal coil in the cutting processing equipment, and taking the cutting processing procedure of the body by the cutting processing equipment to perform material reduction processing on the metal coil to form a planting fixed bridge body;

f. and the cutting processing equipment calls all the interface cutting processing programs to reduce the materials of the planting fixed bridge body to form a plurality of planting fixed bridge interfaces.

2. The planting fixed bridge interface finish machining method of claim 1, wherein: the fine machining method for the planting fixing bridge opening further comprises the following steps:

g. and clamping the planting fixed bridge body on a three-coordinate measuring device, wherein the three-coordinate measuring device takes any one of the planting fixed bridge interfaces as a reference original point, the three-coordinate measuring device measures the positions of all the planting fixed bridge interfaces, and the three-coordinate measuring device generates the distribution coordinates of all the planting fixed bridge interfaces.

3. The planting fixed bridge interface finish machining method of claim 2, wherein: in the step g, the three-coordinate measuring device takes the intersection point of the axis of each planting fixed bridge interface and the end surface as a measuring point.

4. The planting fixed bridge interface finish machining method of claim 2, wherein: the fine machining method for the planting fixing bridge opening further comprises the following steps:

h. obtaining an actual position relationship between every two adjacent planting fixed bridge interfaces according to the distribution coordinates, wherein the position relationship between every two adjacent interfaces is a theoretical position relationship, each actual position relationship is compared with each theoretical position relationship one by one to form a deviation value, and the interface cutting machining program is adjusted according to the deviation value;

i. and returning to the step d or ending.

5. The planting fixed bridge interface finish machining method of claim 1, wherein: in the step d, the intersection point coordinate of the axis and the end face of each interface is obtained according to the machining coordinate system, and each interface cutting machining program takes the intersection point coordinate of the corresponding interface as a lower tool point.

6. The planting fixed bridge interface finish machining method of claim 1, wherein: in the step a, an oral cavity scanner is used for acquiring oral cavity scanning data of a patient; in the step b, the three-dimensional model of the fixed implant bridge is manufactured in CAD design software by using oral cavity scanning data.

Technical Field

The invention relates to the field of manufacturing of dental prostheses, in particular to a finish machining method for an implant fixation bridge interface.

Background

The implant fixing bridge repairing principle is that an implant is implanted into an alveolar bone of a tooth lacking area to serve as an artificial tooth root and play a supporting role, and then an abutment is placed at the upper end of the implant to provide a fixing part of an upper implant fixing bridge. After the implant fixing bridge interface and the abutment retainer matching interface are sequentially fixed together in place, the implant fixing bridge and the artificial tooth form a whole, and finally the artificial tooth crown is cemented on the fixing bridge through cement.

At present, the implant fixing bridge is manufactured by material reduction processing. Firstly, manufacturing a plaster model of the oral cavity of a patient by adopting the prior art, and scanning the plaster model by an optical scanner to obtain three-dimensional data of an optical impression of a plaster dental model; then, scanning data are processed through a computer, and the design of the implant fixed bridge and the interface thereof is completed; and finally, compiling a processing program according to the model of the implant fixed bridge, clamping the metal plate material in cutting processing equipment, and cutting the blank by the cutting processing equipment according to the processing program to form the implant fixed bridge and the interface thereof.

However, the implant fixed bridge and the interface thereof designed in the computer by the three-dimensional data obtained by scanning the plaster model have larger design errors; in the processing process, the processing of the implant fixing bridge and the plurality of interfaces thereof is completed at one time, so that the relative position error between the interfaces is large, and the assembling precision of the interfaces of the implant fixing bridge and the coordination interfaces of the retainers is reduced.

Disclosure of Invention

The present invention is directed to a method for finishing an interface of an implant fixation bridge, which solves one or more of the problems of the prior art and provides at least one of the advantages of the present invention.

The technical scheme adopted for solving the technical problems is as follows:

a finish machining method for an implant fixation bridge interface comprises the following steps:

a. acquiring oral scanning data of the oral cavity of a patient;

b. designing a three-dimensional model of a fixed planting bridge according to the oral scanning data, wherein the three-dimensional model of the fixed planting bridge is provided with a plurality of interfaces, and all the interfaces are distributed at intervals;

c. establishing a processing coordinate system by taking any one of the interfaces as a reference interface and taking an intersection point of an axis of the reference interface and the end face as an origin;

d. writing a body cutting program of the three-dimensional model of the planting fixed bridge based on the machining coordinate system, writing an interface cutting program of each interface based on the machining coordinate system, and importing the body cutting program and all the interface cutting programs into cutting equipment;

e. clamping the metal coil in the cutting processing equipment, and taking the cutting processing procedure of the body by the cutting processing equipment to perform material reduction processing on the metal coil to form a planting fixed bridge body;

f. and the cutting processing equipment calls all the interface cutting processing programs to reduce the materials of the planting fixed bridge body to form a plurality of planting fixed bridge interfaces.

The invention has the beneficial effects that: designing a three-dimensional model of the planting fixed bridge according to oral scanning data of a patient oral cavity, enabling the positions of a plurality of interfaces to accurately correspond to the positions of a plurality of retainers in the patient oral cavity one by one, establishing a machining coordinate system by taking any one interface as a reference interface and taking the intersection point of the axis of the reference interface and the end face as an original point, compiling a body cutting machining program of the three-dimensional model of the planting fixed bridge based on the machining coordinate system, compiling an interface cutting machining program of each interface based on the machining coordinate system, calling the metal plate material to be machined by the body cutting machining program by utilizing cutting machining equipment to form a planting fixed bridge body, and calling all the interface cutting machining programs by cutting machining equipment to machine a plurality of planting fixed bridge interfaces on the planting fixed bridge body; one of the interfaces serves as a reference interface, the reference interface serves as a reference for positioning the planting fixed bridge body and writing a body cutting program for planting the fixed bridge body, the reference interface serves as a reference for positioning each interface and writing an independent interface cutting program for each planting fixed bridge interface, the improvement of the position precision between the planting fixed bridge interfaces on the planting fixed bridge body is facilitated, and therefore the assembling precision of the planting fixed bridge interfaces and the retainer matching interfaces is improved.

As a further improvement of the above technical solution, the fine machining method for the planting fixed bridge connector further comprises the steps of:

g. and clamping the planting fixed bridge body on a three-coordinate measuring device, wherein the three-coordinate measuring device takes any one of the planting fixed bridge interfaces as a reference original point, the three-coordinate measuring device measures the positions of all the planting fixed bridge interfaces, and the three-coordinate measuring device generates the distribution coordinates of all the planting fixed bridge interfaces.

The three-coordinate measuring equipment takes any one planting fixed bridge interface as a reference original point, measures the positions of all the planting fixed bridge interfaces, generates the distribution coordinates of all the planting fixed bridge interfaces, can calculate the position relationship between every two arbitrary planting fixed bridge interfaces, and compares the position relationship of each interface of the three-dimensional model of the planting fixed bridge, thereby determining whether the position of each planting fixed bridge interface is accurate.

As a further improvement of the above technical solution, in the step g, the three-coordinate measuring device takes an intersection point of an axis of each planting fixed bridge interface and an end surface as a measuring point.

The three-coordinate measuring device takes the intersection point of the axis and the end face of each planting fixed bridge interface as a measuring point, and the position coordinate point of the interface of the planting fixed bridge three-dimensional model is consistent with the measuring position coordinate point of the planting fixed bridge interface, so that the distribution positions of all the planting fixed bridge interfaces generated by the three-coordinate measuring device more accurately correspond to the distribution positions of all the interfaces of the planting fixed bridge three-dimensional model.

As a further improvement of the above technical solution, the fine machining method for the planting fixed bridge connector further comprises the steps of:

h. obtaining an actual position relationship between every two adjacent planting fixed bridge interfaces according to the distribution coordinates, wherein the position relationship between every two adjacent interfaces is a theoretical position relationship, each actual position relationship is compared with each theoretical position relationship one by one to form a deviation value, and the interface cutting machining program is adjusted according to the deviation value;

i. and returning to the step d or ending.

And forming a deviation value by corresponding each actual position relation and each theoretical position relation one by one, and adjusting the interface cutting program according to the deviation value so as to optimize the interface cutting program and enable the position of the actually processed planting fixing bridge joint to be more accurate.

As a further improvement of the above technical solution, in the step d, intersection coordinates of an axis and an end surface of each interface are obtained according to the machining coordinate system, and each interface cutting program takes the intersection coordinates of the corresponding interface as a lower tool point.

And acquiring the intersection point coordinate of the axis and the end face of each interface according to a processing coordinate system, wherein each interface cutting processing program takes the intersection point coordinate of the corresponding interface as a lower tool point, so that the lower tool points of each planting fixed bridge interface are ensured to be the same, and errors caused by the difference of the cutting processing programs of different interfaces are reduced.

As a further improvement of the above technical solution, in the step a, an oral cavity scanner is used to obtain oral cavity scanning data of the patient; in the step b, the three-dimensional model of the fixed implant bridge is manufactured in CAD design software by using oral cavity scanning data.

The three-dimensional model of the fixed-planted bridge is directly designed and manufactured in CAD design software according to the oral scanning data, so that the design conversion error in the process of obtaining the three-dimensional data by scanning the plaster model and designing the three-dimensional model of the fixed-planted bridge in a computer by reusing the three-dimensional data is avoided, and the design precision of the three-dimensional model of the fixed-planted bridge is improved.

Drawings

The invention is further described with reference to the accompanying drawings and examples;

FIG. 1 is a schematic flow chart of an embodiment of a finishing method for a planting fixed bridge interface provided by the invention;

fig. 2 is a schematic structural view of an embodiment of the planting fixing bridge body provided by the invention.

100. Plant fixed bridge body, 200, plant fixed bridge interface.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 2, the fine machining method for the planting fixing bridge connector of the invention comprises the following steps:

the finish machining method for the planting fixing bridge connector comprises the following steps:

a. acquiring oral scanning data of a patient by using an oral scanner;

b. manufacturing a planting fixing bridge three-dimensional model in CAD design software according to the oral scanning data, wherein the planting fixing bridge three-dimensional model is provided with a plurality of interfaces, and all the interfaces are distributed at intervals;

c. establishing a processing coordinate system by taking any interface as a reference interface and taking the intersection point of the axis of the reference interface and the end face as an origin, namely the coordinate of the reference interface is (0,0,0), the number of interfaces is multiple, and the coordinate of each interface is (x1, y1, z1), (x2, y2, z2), (x3, y3, z3) … … (xn, yn, zn);

d. writing a body cutting machining program of a three-dimensional model of a planting fixed bridge based on a machining coordinate system, writing an interface cutting machining program of each interface based on the machining coordinate system, for example, importing the three-dimensional model of the planting fixed bridge into numerical control programming software, wherein the numerical control programming software is CAM software such as UG, MASTERCAM, Pro/E and the like, the body cutting machining program and all the interface cutting machining programs are imported into cutting machining equipment such as a numerical control milling machine, a multi-axis linkage machining center and the like, intersection point coordinates of the axis and the end face of each interface are obtained according to the machining coordinate system, and each interface cutting machining program takes the intersection point coordinates of the corresponding interface as a lower tool point;

e. clamping the metal plate material in cutting machining equipment, wherein the metal plate material can be made of metal materials such as titanium alloy, and the cutting machining equipment calls a body cutting machining program to perform material reduction machining on the metal plate material to form a planting fixed bridge body;

f. the cutting processing equipment calls all interface cutting processing programs to perform material reduction processing on the planting fixed bridge body to form a plurality of planting fixed bridge interfaces;

g. clamping the planting fixed bridge body on three-coordinate measuring equipment, wherein the three-coordinate measuring equipment takes any one planting fixed bridge interface as a reference original point, measures the positions of all the planting fixed bridge interfaces, and generates the distribution coordinates of all the planting fixed bridge interfaces;

h. obtaining the actual position relationship between every two adjacent planting fixed bridge interfaces according to the distribution coordinates, wherein the position relationship between every two adjacent interfaces is a theoretical position relationship, each actual position relationship is compared with each theoretical position relationship one by one to form a deviation value, and adjusting the interface cutting program according to the deviation value;

i. and d, returning to the step d or ending, adjusting the interface cutting machining program according to the deviation value, returning to the step d to carry out the next cycle until the planting fixed bridge body with the deviation value between every two adjacent planting fixed bridge interfaces meeting the requirement can be machined, and ending.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.