Computer simulation method for predicting soft tissue appearance change after maxillofacial bone plastic surgery

Abstract

The invention belongs to the computer aided surgical technique and maxillofacial plastic medical treatment equipment field and relates to a computer simulation method for predicting soft tissue appearance change after a maxillofacial bone plastic surgery. The method comprises the following steps that: spiral CT scanning is performed on the maxillofacial of a patient before the surgery; data are led into maxillofacial surgery design simulation software, namely, CMF-pre CADS, so that a three-dimensional maxilla and skin surface model is re-constructed; a bone segment is reset/shifted to a preliminary location; and the similarity of a pre-surgery prediction model and a post-surgery true appearance is judged through comparison through Geomagic software. With the method adopted, the post-surgery appearance and stomatognathic system functions can be recovered excellently; the appearance of soft tissues are symmetrical, harmonious and beautiful; the post-surgery satisfaction degree of the patient reaches 95%; the effects of the plastic surgery are stable; and long-term satisfaction is also very high.

Description

technical field [0001] The invention relates to the field of computer-aided surgery technology and maxillofacial plastic surgery medical equipment, in particular to a computer simulation method for predicting changes in soft tissue appearance after maxillofacial surgery. Background technique [0002] With the development of evidence-based medicine and minimally invasive surgery, accurate preoperative planning in maxillofacial surgery is becoming more and more important. At the same time, in the process of maxillofacial growth and development research, trauma repair and cosmetic plastic treatment, three-dimensional modeling, measurement analysis and surgical effect simulation of soft and hard tissues are the premise and key of digital preoperative design, among which soft tissue appearance prediction is particularly important. In order to obtain the best surgical results, maxillofacial surgery often requires doctors to predict the postoperative facial morphology changes bas...

AI Technical Summary

Problems solved by technology

The main defects of the existing simulation software system are: 1). The simulation algorithm used is based on the statistical results of a large number of geometric models, and has not established a high-precision physical parameter model. The soft tissue deformation effect obtained by this algorithm is only physiological. The approximate value of the characteristics; 2). The statistical data of the algorithm is mostly derived from the experimental data of the Western race, which is not applicable to our Eastern population; 3). The systematic error in the registration process will undoubtedly affect the accuracy of the prediction

[0005] So far, there is still a lack of an ideal and comprehensive 3D modeling method and soft tissue deformation simulation platform at home and abroad.

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