Three-dimensional model reconstructing method for keeping fracture line of jaw bone

Abstract

The invention discloses a three-dimensional model reconstructing method for keeping a fracture line of a jaw bone. The method is characterized by comprising the following steps that 1, CT data, in accordance with a Dicom protocol, of an injured jaw bone are input; 2, a surface model of the jaw bone is extracted by using a Marching Cube isosurface algorithm; 3, a segmentation algorithm which combines a Gaussian mixture model with Graph Cut is used for rapidly completing segmentation of broken bone blocks and a main bone block; 4, automatic replacement is conducted on the broken bone blocks on the basis of the symmetry, and a complete jaw bone model is obtained by splicing the broken bone blocks and the main bone block; 5, positioning devices which are each composed of a pair of coupling block devices are additionally arranged on the seams of the complete model obtained through splicing; 6, a complete three-dimensional solid model is obtained through assembling according to the positioning devices. By means of the three-dimensional model reconstructing method for keeping the fracture line of the jaw bone, in a jaw bone repairing operation, particularly when chimerism, fixation and repair are conducted between the broken bone blocks and between the broken bone blocks and the main bone block, the fracture line information of the defect parts is kept, so that errors in the operation are reduced, the wounds of a patient are reduced, the process of the operation is accelerated, and the operation effect is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of medical images, and relates to a 3D model reconstruction method for preserving jaw fracture lines. Background technique [0002] With the rapid development of modern civilization, especially the continuous improvement of transportation, the incidence of craniofacial trauma is also increasing year by year. Since the human jawbone is an important structure to maintain the facial shape and perform oral functions, it has complex physiological functions. The defect and dislocation of the jawbone can easily lead to facial deformities in patients, and in severe cases, the oral functions such as chewing, speech and swallowing will be lost. It has greatly affected the physical and mental health of patients, and affected the quality of life of patients. [0003] At present, the main treatment method for jaw repair is surgical treatment, which restores the patient's face by repositioning the detached or missing bon...

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Problems solved by technology

[0006] On the other hand, with the maturity of 3D printing technology, it is becoming easier to make and repair a complete resin model of the jaw bone. However, larger models also have higher requirements for instruments and equipment, and problems such as difficulty in one-time printing and molding still exist. It is also difficult to accurately express the fracture line information of the defect on the printed resin model

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