Digitalized preparation method of titanium mesh cranial prosthesis

Abstract

The invention relates to a digitalized preparation method of a titanium mesh cranial prosthesis, which belongs to the field of neurosurgical cranial repair and is used for solving the problems of complicated design, large prosthesis forming springback amount, poor processing precision, and the like of the prosthesis model in the prior art. The digitalized preparation method comprises the following steps of: carrying out model design of the cranial prosthesis on the basis of a cranial CT (Computed Tomography) image; making a reference prosthesis by a rapid prototyping system; carrying out numerical simulation analysis of forming and springback process on the prosthesis; repeatedly modifying a processing track and a supporting model till the springback amount meets the requirement; then guiding into a plate moving coil electromagnetic incremental forming system and carrying out prosthesis forming; and finally comparing with the reference prosthesis and cutting to obtain a final prosthesis. The digitalized preparation method is characterized in that: a direct line-to-surface method is applied to carrying out the model design of the prosthesis, numerical simulation on the prosthesis forming and processing by adopting the plate moving coil electromagnetic incremental forming system, The invention has the advantages of short prosthesis making period, small springback amount, high precision and good adhesion with the cranium of a patient and realizes high-quality cranial repair.

Description

technical field [0001] The invention discloses a digital preparation method of a titanium mesh skull prosthesis, which is mainly used in the medical field, and is especially suitable for cranial bone repair in neurosurgery and medical plastic surgery. Background technique [0002] In the field of skull repair in neurosurgery, titanium alloy has become an ideal material for skull repair due to its good tissue compatibility, light weight and high strength. The preparation of titanium alloy cranial prostheses initially relied on manual shaping, and it is still a commonly used shaping method in China. Based on the appearance and shape of the patient's defect and their own experience, the doctor manually prefabricated the approximate shape of the prosthesis, compared it with the patient's exposed skull during the operation, and then manually modified the shape repeatedly, and finally completed the operation with disinfection. This method takes a long time to operate, and it is d...

AI Technical Summary

Problems solved by technology

Chinese Patent Publication No. CN 1523530A, published on August 25, 2004, the name of the invention is a preparation method of titanium alloy cranial prosthesis. The application discloses the use of digitally designed prosthetic three-dimensional model and then the use of multi-point forming system to make Skull prosthesis, although this method solves the problems of the edge of the prosthesis and the edge of the defect in other methods in the past, high cost, and long production time, it has a certain degree of advancement

This method has a very large and complicated workload due to the large amount of CT atlases, and there is no intuitive 3D model for the designer to refer to. Using a multi-point forming system to press the restoration has a large amount of rebound and low precision, and there is no reference after pressing. Obvious shortcomings such as comparison and cropping of restorations, low boundary accuracy, etc.

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