CT image based porous implant making method and system

A technology of CT images and production methods, which is applied in the fields of dental implants, medical science, and dental restorations. It can solve problems such as implant failure, implant loosening, and unfavorable new bone growth, and achieve a high degree of fit, lower elastic modulus, and The effect of avoiding the stress shielding phenomenon

Inactive Publication Date: 2020-07-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastic modulus of titanium alloy is much larger than the elastic modulus of the surrounding bone tissue, which will cause stress shielding, which is not conducive to the new bone growth of the bone tissue around the implant, and bone resorption around the implant will lead to loosening of the implant and eventually lead to implant failure.

Method used

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  • CT image based porous implant making method and system
  • CT image based porous implant making method and system
  • CT image based porous implant making method and system

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Experimental program
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Embodiment 1

[0031] This embodiment provides a method for making porous implants based on CT images, such as figure 1 As shown, firstly, all contours of a single tooth are segmented according to the patient’s oral CT image, and then the segmented contour is converted into a 3D point cloud format by using the coordinate transformation mechanism, and the whole tooth model is reconstructed; The root part of the tooth model is obtained by segmenting the tooth model. According to the patient's root part and crown part (if the crown part does not exist, the mirror image crown is considered), the personalized abutment is reconstructed, and the three-period minimal surface (Triply Periodic Minimal Surfaces, TPMS) structure is used to reconstruct the shape of the root. A customized root-type implant integrated with the porous structure abutment implant.

[0032] Because oral CT images have the characteristics of uneven gray scale, the mixed level set model can accurately identify the contour of a ...

Embodiment 2

[0054] This embodiment provides a CT image-based porous implant production system, including:

[0055] Contour segmentation module: used to segment the contour of a single tooth according to the patient's oral CT image;

[0056] Root model reconstruction module: used to convert the segmented tooth contour into a three-dimensional point cloud format, and reconstruct the tooth model; and determine the crown-to-root ratio according to the CT image to segment to obtain the tooth root model;

[0057] Porous structure design module: used to design the shape of the porous structure implant according to the shape of the patient's tooth root;

[0058] Implant model building module: It is used to design a personalized abutment according to the root part and the crown part or the mirror image crown part, and finally establish a root-shaped implant with the abutment implant integrated.

Embodiment 3

[0060] The purpose of this embodiment is to provide an electronic device, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the program, the following steps are implemented, including:

[0061] Segment the outline of a single tooth based on the patient's oral CT image;

[0062] Convert the segmented tooth outline into a 3D point cloud format to reconstruct the tooth model; and determine the crown-to-root ratio according to the CT image to segment to obtain the tooth root model;

[0063] Design the shape of the porous structure implant according to the shape of the patient's tooth root;

[0064] Design a personalized abutment according to the root part and the crown part or the mirror image crown part, and finally establish a root-shaped implant with an integrated abutment-implant.

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Abstract

The present invention discloses a CT image based porous implant making method and system. The technical scheme is that a single tooth profile is segmented according to an oral CT image of a patient; the segmented tooth profile is converted to be in a three-dimensional point cloud format, and a tooth model is rebuilt; the crown and root ratio is determined according to the CT image and segmentationis performed to obtain a tooth root model; a porous implant form is designed according to a tooth root form of the patient; and a personalized abutment is designed according to a tooth root part anda tooth crown part or a mirror tooth crown part, and a root type implant with integrated abutment and implant is finally established. The degree of matching between the root type implant and the bonewall of a tooth socket for tooth extraction is higher; and the phenomenon of stress shielding can be avoided, and the high long-term stability can be obtained after implantation of the implant.

Description

technical field [0001] The invention relates to the technical field of implant production, in particular to a CT image-based porous implant production method and system. Background technique [0002] Immediate implant restoration means that after tooth extraction, the implant is directly implanted into the implant socket prepared by the alveolar socket, and after three to six months of restoration, the crown of the restoration is embedded. Compared with traditional implant restoration, immediate implant restoration has a shorter treatment period, and patients undergo fewer operations. The bone wall shape of the implant and the extraction socket is inconsistent with traditional implants, making immediate implantation more difficult to obtain good initial stability, and the gap between the two needs to be filled with artificial bone powder for closure. At present, whether it is immediate implantation or traditional implantation, the patient adapts to the implant rather than t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C8/00
CPCA61C8/00
Inventor 马嵩华宋凯乐
Owner SHANDONG UNIV
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