Design and use method of personalized patella fracture surgery navigation template

Abstract

The invention discloses a design and use method of a personalized patella fracture surgery navigation template. The design and use method is used for improving fracture reduction quality and efficiency of comminuted patella. The method comprises the following steps of importing bilateral patella CT scanning data into a computer, respectively establishing 3D models of bilateral patella, mirroring a3D model of a healthy side patella, assisting virtual restoration of an affected side patella, and on the basis of the virtual restored 3D model of the subchondral bone of the patella, thickening thesubchondral bone of the patella to reach the thickness of a cartilage surface to form a cartilage surface morphology 3D model; and on the basis of the artificial virtual cartilage surface 3D model, thickening the cartilage surface of the patella to the thickness required by the surgical navigation template in a thickening manner, and finally, enabling the patella and the virtual cartilage surfaceto be subtracted in a Boolean subtraction manner, so that the design of the navigation template is completed. For displaced comminuted patella fractures, an upper half patella reduction navigation template, a lower half patella reduction navigation template and a full patella reduction navigation template need to be designed respectively, printed and formed by a 3D printer, disinfected and then used in an operation.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a method for designing and using a personalized patella fracture surgery navigation template. Background technique [0002] 3D printed surgical navigation templates have been widely used in orthopedic clinical operations to guide positioning, drilling, osteotomy, reduction and other surgical operations; the basis of its guidance is to establish a unique fit between the bone surface and the bone surface The surface mask is used as a reference for positioning or reset, or a guiding device for drilling or osteotomy is established on this mask; therefore, the accuracy of the mask is the basis for the application of surgical navigation templates. [0003] A mask with the bone surface as the fitting surface can usually overlap and match the fitting surface with the real bone surface seen during the operation to obtain a precise fit; however, the thickness of the anterior surf...

AI Technical Summary

Problems solved by technology

[0003] A mask with the bone surface as the fitting surface can usually overlap and match the fitting surface with the real bone surface seen during the operation to obtain a precise fit; however, the thickness of the anterior surface of the patella that can be seen directly varies from person to person The quadriceps aponeurosis and other soft tissues must be protected during the operation and cannot be stripped like other parts to fully expose the front surface of the patella, so the surgical navigation template designed based on the 3D digital model of the patella established by CT scan data The mask cannot fit the soft tissue in front of the patella, and the comminuted fracture of the patella can only be reduced and fixed using the most primitive freehand techniques.

Images