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A kind of preparation method of mandibular angle osteotomy navigation template

A technology for navigating templates and mandibles, which is applied in the field of mandibular angle osteotomy, and can solve the problems of increased uncertainty in osteotomy operations, template displacement, and leftover scars

Active Publication Date: 2018-05-25
SOUTHERN MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The navigation template has the following defects: (1) The operation can only be performed through an extraoral incision, and the postoperative scar remains
(2) The navigation template is not effectively fixed, and the operation of the instrument is likely to cause the template to shift, thereby reducing the accuracy of the osteotomy operation
The mandibular angle navigation template designed by Niansong Ye et al.: (1) The intraoral incision approach is adopted, and the "hook"-shaped protrusion on the template is used for fixation, which is still not reliable. In actual surgical operations, the operation of instruments may easily cause the template to shift. thereby reducing the accuracy of the osteotomy
(2) When placing the navigation template on the surface of the mandibular angle, it is impossible to determine whether the template is in the correct position (due to factors such as soft tissue obstruction), which increases the uncertainty of the osteotomy operation

Method used

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  • A kind of preparation method of mandibular angle osteotomy navigation template
  • A kind of preparation method of mandibular angle osteotomy navigation template
  • A kind of preparation method of mandibular angle osteotomy navigation template

Examples

Experimental program
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Embodiment 1

[0032] A method for preparing a mandibular angle osteotomy navigation template, which is carried out through the following steps.

[0033] (1) Collect the CT data of the mandible of the target subject, and import it into the digital 3D reconstruction software Mimics 14.0 in Dicom format to reconstruct the 3D virtual mandibular angle model to obtain the virtual 3D model of the mandible.

[0034]In the process of reconstructing the three-dimensional virtual mandibular angle model, by selecting the threshold value of the bone, the threshold value of the bone ranges from 226 to the maximum threshold value, and the mandible shows a clear model as the virtual three-dimensional mandible model.

[0035] (2) According to the virtual three-dimensional model of the mandible, select any side of the mandibular angle to design the osteotomy line of the mandibular angle;

[0036] Taking the mid-sagittal plane of the mandible as the mirror plane, the osteotomy line was mirrored to the mandibu...

Embodiment 2

[0050] The method of the present invention is described in detail with a specific example.

[0051] A method for preparing a mandibular angle osteotomy navigation template, which is carried out through the following steps.

[0052] (1) Collect the CT data of the mandible of the target object, and import it into the digital 3D reconstruction software Mimics 14.0 in Dicom format to reconstruct the 3D virtual mandibular angle model. After determining the front, back, left, right, up and down positions, select The threshold of the bone (226~Max, Hu), adjust the selected threshold accordingly until the most suitable threshold is obtained, at this time the mandibular angle is displayed most clearly, and the 3D reconstruction is performed to obtain the virtual 3D model of the mandible. Edit and adjust the three-dimensional model of the virtual mandibular angle, remove other irrelevant structures, so as not to affect the field of view and operation, and only keep the virtual three-dim...

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Abstract

The invention discloses a mandible angle osteotomy navigation template preparation method, and the method comprises the steps: (1), building a virtual mandible three-dimensional model; (2), designing an osteotomy line; (3), marking an osteotomy initial body, registering the initial body, and obtaining a thickened registered body and a thickened osteotomy body; (4), carrying out the local Boolean addition of the thickened registered body and the thickened osteotomy body through employing the local Boolean operation, enabling the thickened registered body and the thickened osteotomy body to become an integrated navigation template, and carrying out the smoothening of the external surface; (5), obtaining a mandible angle osteotomy navigation template, and opening a 2.5mm*2.5mm window at a second molar position of the mandible angle osteotomy navigation template. The method provided by the invention is simple in preparation of the mandible angle osteotomy navigation template, and the template is provided with an effective registering part, wherein the registering part can accurately determine the position of the template.

Description

technical field [0001] The invention relates to the technical field of mandibular angle osteotomy, in particular to a preparation method of a mandibular angle osteotomy navigation template. Background technique [0002] With the improvement of material living standards, people's demand for beauty continues to increase, and the requirements for many plastic surgery operations have reached a new height. Mandibular angle osteotomy plastic surgery is to change the lower facial contour by cutting off the posterior edge of the mandible, the mandibular angle, and the lower edge of the mandible. For this type of osteotomy that requires symmetrical operations on the face, the accuracy of the osteotomy during the operation and the symmetry of the facial bones after the operation are often the key to determining the final plastic surgery effect. [0003] The intraoral approach has gradually become the most ideal surgical approach due to its advantage of no scars. However, due to the n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/15A61B34/10
CPCA61B17/15
Inventor 黄文华钱堃
Owner SOUTHERN MEDICAL UNIVERSITY
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