Method for generating extended smooth cutting line for real gingiva, program, storage medium, and device

Abstract

The invention relates to a method for generating an extended smooth cutting line of a real gingiva. The method comprises the following steps: S1, acquiring a standard edge cutting line of the real gingiva; s2, offset parameters of different cutting line points are obtained; and S3, carrying out interval point collection on the standard edge cutting line, and carrying out fitting. And S4, replacing points with the same indexes as those of the peripheral points of the caudal tooth cavity of the original real gingival standard edge cutting line in the fitted curve, and carrying out smoothing processing to obtain a fitted curve after interval sampling smoothing. And S5, according to the offset parameter of the corresponding cutting mode, the smoothed curve is shifted by a corresponding distance according to the offset, and the smoothed extended cutting line is obtained. According to the method for generating the extended smooth cutting line of the real gingiva, the cutting line of the extended part is smoothed by mainly using a traditional image geometric algorithm and utilizing the surface grid characteristics of the real gingiva and the original extended cutting line of the real gingiva, so that the purposes of reducing discomfort of a patient and saving manpower and material resources are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of orthodontics, and particularly relates to a method, program, storage medium, and device for generating an extended smooth cutting line of a real gingiva. Background Art

[0002] A real gingiva appliance is a digital model appliance generated based on oral scan data, which can restore the initial state of the gingiva and simulate the deformation state of the real gingiva according to the movement of the teeth, so as to achieve a close fit between the real gingiva and the appliance and improve the orthodontic effect.

[0003] The existing types of real gingiva appliances can be classified into a full-arch extended cutting line type, a posterior tooth extended cutting line type, an anterior tooth extended cutting line type, and a standard cutting type (i.e., cutting along the boundary of the normal tooth cavity line) according to the cutting trajectory. However, for the first three extended cutting methods, they are obtained by equally proportionally moving down along the position of the gingival margin, which will cause the bottom edge of the obtained appliance to have a large undulation and not be smooth enough, which may cause cutting problems or discomfort to the patient. Therefore, subsequent manual grinding or re-cutting and pressure molding operations may be required. This phenomenon greatly increases the consumption of human and material resources. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to design a method for generating an extended smooth cutting line of a real gingiva, so as to reduce the discomfort of the patient and save human and material resources, thereby solving the existing technical problems.

[0005] To solve the above technical problem, the present invention provides a method for generating an extended smooth cutting line of a real gingiva, including the following steps: Step S1: Obtain the standard edge cutting line of the real gingiva.

[0006] Step S2: Obtain the offset parameter of different cutting line points.

[0007] Step S3: Sample points at intervals on the standard edge cutting line and perform fitting.

[0008] Step S4: Replace the points in the fitted curve that have the same index as the peripheral points of the tail tooth cavity of the original standard edge cutting line of the real gingiva, and perform smoothing processing to obtain a smoothed fitted curve after interval sampling.

[0009] Step S5: According to the offset parameter of the corresponding cutting method, offset the smoothed curve by the corresponding distance according to the offset amount to obtain a smoothed extended cutting line.

[0010] Further, in step S2, when the cutting method is full-arch extension, the standard edge cutting line obtained in step S1 is segmented according to tooth positions. The points around the last molar cavity line are default without offset, and the points at other positions are all offset downward by ∆d mm.

[0011] Further, in step S2, when the cutting method is only posterior tooth extension, the standard edge cutting line obtained in step S1 is segmented according to tooth positions. The points around the cavities of posterior teeth (i.e., teeth No. 4 - 6) except the last molar cavity line are offset downward by ∆d mm, and the points around the cavity lines at other tooth positions are default without offset.

[0012] Further, in step S2, when the cutting method is only anterior tooth extension, the standard edge cutting line obtained in step S1 is segmented according to tooth positions. The cutting line points around the cavities of anterior teeth (i.e., teeth No. 1 - 3) are offset downward by ∆d mm, and the positions of the cutting line points around the cavities at other tooth positions remain unchanged.

[0013] Further, for the cutting points at the connection between the downward offset and non - offset areas, they are equally divided according to the number of points according to the selected offset amount ∆d, and are successively used as the offset amounts of the connection points in the buffer area. The value range of the offset amount ∆d is 2 mm ≤ ∆d ≤ 3 mm.

[0014] Further, in step S3, it specifically includes the following steps: Step S31: Sample points at intervals on the standard edge cutting line, and the interval value is selected between 5 and 20 to obtain the sampling points of the new curve.

[0015] Step S32: Fit the sampling points using a B - spline curve.

[0016] Further, in step S4, the points on the fitted curve are replaced with the original real gingiva standard edge cutting points, and smoothing is performed again using B - spline to obtain the smoothed fitted curve with interval sampling.

[0017] The present invention also provides a computer program product, including computer instructions, and when the computer instructions are run by a processor, the computer device is enabled to execute the method for generating the extended and smoothed cutting line of real gingiva as described above.

[0018] The present invention also provides a computer - readable storage medium, on which computer - executable instructions are stored. When a processor executes the computer - executable instructions, the method for generating the extended and smoothed cutting line of real gingiva as described above is implemented.

[0019] The present invention also provides a device for generating the extended and smoothed cutting line of real gingiva, including: At least one processor; and At least one memory communicatively connected to the processor; Among them, the memory stores instructions executable by the processor, and the instructions are executed by the processor to enable the device to execute the method for generating an extended smooth cutting line of a real gingiva described above.

[0020] Advantages of the invention: The method for generating an extended smooth cutting line of a real gingiva according to the present invention mainly relies on traditional image geometric algorithms, utilizes the surface grid features of the real gingiva and the original extended cutting line of the real gingiva, and smooths the cutting line of the extended part, so as to reduce the discomfort of patients and save human and material resources. Description of the drawings

[0021] The following further clarifies the specific implementation manners of the present invention with reference to the drawings.

[0022] Figure 1 It is a flowchart of the method for generating an extended smooth cutting line of a real gingiva according to the present invention.

[0023] Figure 2 It is a schematic diagram of the standard edge cutting line of the real gingiva in the present invention.

[0024] Figure 3 It is a schematic diagram of the curve after interval sampling and smoothing of the cutting line in the present invention (red curve).

[0025] Figure 4 It is a schematic diagram of the extended smooth cutting line of the whole jaw of the real gingiva in the present invention.

[0026] Figure 5 It is a schematic diagram of the extended smooth cutting line of only the posterior teeth of the real gingiva in the present invention.

[0027] Figure 6 It is a schematic diagram of the extended smooth cutting line of only the anterior teeth of the real gingiva in the present invention. Specific implementation manners Embodiment 1

[0028] Combined with Figure 1 The method for generating an extended smooth cutting line of the real gingiva in this embodiment includes the following steps: Step S1: Obtain the standard edge cutting line of the real gingiva, as Figure 2 shown.

[0029] Step S2: Obtain the offset parameters of different cutting line points.

[0030] Specifically in this embodiment, taking the extended cutting of the whole jaw as an example.

[0031] Preferably in this embodiment, in step S2, the standard edge cutting line obtained in step S1 is segmented according to tooth positions, and the points around the carious cavity line of the last tooth are defaulted not to be offset, and the rest of the positions are all offset downward by ∆d mm.

[0032] Preferably, in this embodiment, the cutting point at the junction of downward offset and non-offset is equally divided according to the selected offset amount ∆d by the number of points, and used as the offset amount of the points at the junction of the buffer area in sequence. The value range of the offset amount ∆d is 2 mm ≤ ∆d ≤ 3 mm.

[0033] Step S3: Sample points at intervals on the standard edge cutting line and perform fitting.

[0034] Preferably, in this embodiment, step S3 specifically includes the following steps: Step S31: Sample points at intervals on the standard edge cutting line, and the interval value is selected between 5 and 20 to obtain the sampling points of the new curve.

[0035] Step S32: Fit the sampling points using a B-spline curve.

[0036] Step S4: Replace the points in the fitted curve that have the same index as the points around the tail tooth hole of the original true gingiva standard edge cutting line, and perform smoothing to obtain the smoothed fitted curve after interval sampling.

[0037] Preferably, in this embodiment, in step S4, the points of the fitted curve are replaced with the original true gingiva standard edge cutting points, and smoothing is performed again using a B-spline to obtain the smoothed fitted curve after interval sampling, specifically as Figure 3 shown. The red curve in the figure is the smoothed curve.

[0038] Step S5: According to the offset amount parameter of the corresponding cutting method in step S2, that is, the cutting point offset amount at different tooth positions (∆d takes 2 mm - 3 mm or 0 mm), offset the smoothed curve by the corresponding distance according to the offset amount to obtain the smoothed extended cutting line. The true gingiva full-arch extended smoothed cutting line obtained in this embodiment is as Figure 4 shown. Embodiment 2

[0039] Combined with Figure 1 , the method for generating the extended smoothed cutting line of the true gingiva in this embodiment includes the following steps: Step S1: Obtain the true gingiva standard edge cutting line, as Figure 2 shown.

[0040] Step S2: Obtain the offset amount parameters of different cutting line points.

[0041] Specifically, in this embodiment, the posterior tooth extension cutting is taken as an example.

[0042] Preferably, in this embodiment, in step S2, the standard edge cutting line obtained in step S1 is segmented according to tooth positions, and the points around the tooth cavities of the posterior teeth (i.e., teeth No. 4 - 6) except for the tooth cavity line of the last tooth are offset downward by ∆d mm, and the points around the tooth cavity lines at other tooth positions are not offset by default.

[0043] Preferably, in this embodiment, the cutting points at the connection between the downward offset and the non - offset are equally divided according to the number of points according to the selected offset amount ∆d, and are used as the offset amounts of the connection points in the buffer area in turn. The value range of the offset amount ∆d is 2mm ≤ ∆d ≤ 3 mm.

[0044] Step S3: Sample the standard edge cutting line at intervals and perform fitting.

[0045] Preferably, in this embodiment, step S3 specifically includes the following steps: Step S31: Sample the standard edge cutting line at intervals, and the interval value is selected between 5 - 20 to obtain the sampling points of the new curve.

[0046] Step S32: Fit the sampling points using a B - spline curve.

[0047] Step S4: Replace the points in the fitted curve that have the same index as the points around the tooth cavity of the last tooth in the original true gingiva standard edge cutting line, and perform smoothing to obtain the smoothed fitted curve after interval sampling.

[0048] Preferably, in this embodiment, in step S4, the points in the fitted curve are replaced with the original true gingiva standard edge cutting points, and smoothing is performed again using B - spline to obtain the smoothed fitted curve after interval sampling, specifically as Figure 3 shown. The red curve in the figure is the smoothed curve.

[0049] Step S5: According to the offset amount parameters of the corresponding cutting method in step S2, that is, the offset amounts of the cutting points at different tooth positions (∆d takes 2mm - 3 mm or 0 mm), offset the smoothed curve by the corresponding distance according to the offset amount to obtain the smoothed extended cutting line. The true gingiva obtained in this embodiment only has the posterior extended smoothed cutting line as Figure 5 shown. Embodiment 3

[0050] Combined with Figure 1 , the method for generating the extended smoothed cutting line of the true gingiva in this embodiment includes the following steps: Step S1: Obtain the true gingiva standard edge cutting line, as Figure 2 shown.

[0051] Step S2: Obtain the offset amount parameters of different cutting line points.

[0052] Specifically, in this embodiment, only the anterior tooth extension cutting is taken as an example.

[0053] Preferably, in step S2 of this embodiment, in step S2, the standard edge cutting line obtained in step S1 is segmented according to tooth positions. The cutting line points of the anterior teeth (i.e., teeth No. 1 - 3) located around the tooth cavity are offset downward by ∆d mm, and the cutting line points of the tooth cavity periphery at other tooth positions remain unchanged.

[0054] Preferably, in this embodiment, the cutting points at the junction of downward offset and non - offset are equally divided according to the number of points according to the selected offset amount ∆d, and are used as the offset amounts of the points at the junction of the buffer area in turn. The value range of the offset amount ∆d is 2mm ≤ ∆d ≤ 3 mm.

[0055] Step S3: Sample the standard edge cutting line at intervals and perform fitting.

[0056] Preferably, in step S3 of this embodiment, it specifically includes the following steps: Step S31: Sample the standard edge cutting line at intervals, and the interval value is selected between 5 - 20 to obtain the sampling points of the new curve.

[0057] Step S32: Fit the sampling points using a B - spline curve.

[0058] Step S4: Replace the points in the fitted curve that have the same index as the peripheral points of the tooth cavity of the last tooth of the original true gingiva standard edge cutting line, and perform smoothing to obtain a smoothed fitted curve after interval sampling.

[0059] Preferably, in step S4 of this embodiment, the points of the fitted curve are replaced with the original true gingiva standard edge cutting points, and smoothing is performed again using B - spline to obtain a smoothed fitted curve after interval sampling, specifically as Figure 3 shown. The red curve in the figure is the smoothed curve.

[0060] Step S5: According to the offset parameter of the corresponding cutting method in step S2, that is, the cutting point offset amounts at different tooth positions (∆d takes 2mm - 3 mm or 0mm), offset the smoothed curve by the corresponding distance according to the offset amount to obtain a smoothed extended cutting line. The true gingiva only anterior tooth extended smoothed cutting line obtained in this embodiment is as Figure 6 shown. Embodiment 4

[0061] This embodiment provides a computer program product, including computer instructions, which when run by a processor cause the computer device to execute the method for generating an extended smoothed cutting line of true gingiva as described in any one of Embodiment 1 or Embodiment 2 or Embodiment 3. Embodiment 5

[0062] This embodiment provides a computer-readable storage medium, on which computer-executable instructions are stored. When a processor executes the computer-executable instructions, a method for generating an extended smooth cutting line of a real gum as described in any one of Embodiment 1, Embodiment 2, or Embodiment 3 is implemented. Embodiment 6

[0063] This embodiment provides a device for generating an extended smooth cutting line of a real gum, including: At least one processor; and At least one memory communicatively connected to the processor; Wherein, the memory stores instructions executable by the processor, and when the instructions are executed by the processor, the device executes a method for generating an extended smooth cutting line of a real gum as described in any one of Embodiment 1, Embodiment 2, or Embodiment 3.

[0064] Many specific details are set forth in the above description in order to provide a thorough understanding of the present invention. However, the above description is only a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for generating an extended smooth cutting line of a real gum, characterized by: The steps include: Step S1: obtaining the real gingival standard edge cutting line; Step S2: Obtaining offset parameters of different cutting line points; Step S3: sampling points at intervals on the standard edge cutting line and performing fitting; Step S4: replacing the points in the fitted curve with the same index as the points around the tooth cavity of the original real standard gingival edge cutting line, and performing smoothing to obtain a fitting curve after interval sampling and smoothing; Step S5: according to the offset parameter of the corresponding cutting method, the smoothed curve is offset by a corresponding distance according to the offset to obtain a smoothed extended cutting line.

2. The method for generating an extended smooth cutting line of a real gum according to claim 1, characterized in that: In step S2, when the cutting method is full jaw extension, the standard edge cutting line obtained in step S1 is segmented according to the tooth position, the peripheral points of the tooth cavity line of the tail tooth are not offset by default, and the other positions are offset downward by ∆ d mm.

3. The method for generating an extended smooth cutting line of a real gum according to claim 1, characterized in that: In step S2, when the cutting method is to extend only the posterior teeth, the standard edge cutting line obtained in step S1 is segmented according to the tooth position, and the perimeter points of the posterior tooth cavities except the posterior tooth cavities are offset downward by ∆ d mm, and the perimeter points of the cavities at the other tooth positions are not offset by default.

4. The method for generating an extended smooth cutting line of a real gum according to claim 1, characterized in that: In step S2, when the cutting method is to extend only the front teeth, the standard edge cutting line obtained in step S1 is segmented according to the tooth position, and the cutting line points of the front teeth located around the tooth cavity are shifted downward by ∆ d mm, and the positions of the cutting line points around the tooth cavity at the other tooth positions remain unchanged.

5. The method for generating an extended smooth cutting line of a real gum according to any one of claims 2 to 4, characterized in that: The cutting points at the junction of the downward offset and the non-offset are equally divided according to the selected offset ∆ d according to the number of points, and are used as the offsets of the points at the junction of the buffer area in turn. The value range of the offset ∆ d is 2 mm≤∆ d≤3 mm.

6. The method for generating an extended smooth cutting line of a real gum according to claim 1, characterized in that: Step S3 specifically includes the following steps: Step S31: sampling points at intervals along the standard edge cutting line, with the interval value selected between 5 and 20, to obtain sampling points of a new curve; Step S32: Fit the sampling points using a B-spline curve.

7. The method for generating an extended smooth cutting line of a real gum according to claim 1, characterized in that: In step S4, the fitted curve points are replaced with the original real gingival standard edge cutting points, and the B-spline is used again for smoothing to obtain the fitting curve after interval sampling smoothing.

8. A computer program product, characterized in that: The method comprises computer instructions, which, when executed by a processor, enable a computer device to execute the method for generating an extended smooth cutting line of a real gum according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: Computer-executable instructions are stored thereon, and when the processor executes the computer-executable instructions, the method for generating an extended smooth cutting line of a real gum as described in any one of claims 1-7 is implemented.

10. A device for generating an extended smooth cutting line of a real gum, characterized in that: include: at least one processor; as well as at least one memory in communication with the processor; The memory stores instructions executable by the processor, and the instructions are executed by the processor to enable the device to execute the method for generating an extended smooth cutting line of a real gum according to any one of claims 1 to 7.

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