Characteristic line-based parametric design method for bone fracture plate abutment surface

Abstract

The invention discloses a characteristic line-based parametric design method for a bone fracture plate abutment surface. The characteristic line-based parametric design method comprises the following steps: (1) on the basis of a bone model, selecting an abutment surface region of a related bone fracture plate, and reconstructing curved surface characteristics of the selected region on the basis of a characteristic line; (2) defining key points and characteristic points on the characteristic line, wherein the characteristic points are one part of the key points; the key points are used for determining the basic shape of the characteristic line; and the characteristic points are used for defining characteristic parameters; (3) building the characteristic line by a cubic B spline interpolation curve, wherein the characteristic line comprises interpolating points, and defining a few of interpolating points to be the key points by a user; and (4) setting semantic parameters on the basis of the characteristic points, building a constrained relationship between the characteristic points and generating the curved surface characteristics employing the characteristic line as the center. According to the characteristic line-based parametric design method, the bone fracture plate form can be intuitively modified through high-level parameters; a series of diversified bone fracture plates can be generated; the method is of great significance in a bone fracture plate design of a patient in an orthopedic surgery; and the development cycle of a product can be effectively shortened; and the production efficiency can be improved.

Description

technical field [0001] The invention relates to a digital bone plate design technology, in particular to a design method of a parametric bone plate fitting surface, and belongs to the field of computer-aided design. Background technique [0002] As an important research content of digital orthopedics, digital orthopedic implant design has attracted extensive attention from domestic and foreign researchers. The most common orthopedic implants include: bone plate, intramedullary nail, steel pin, etc. The design of the bone plate is the core of the implant design, and the design of the fitting surface is the key to the reasonable design of the bone plate. The conformity of the fitting surface of the bone plate to the surface of the bone and the position of the screws are still not ideal, and clinicians need to compare and shape the bone many times, resulting in time-consuming, labor-intensive and low-efficiency surgery. Considering that feature lines are the main elements of s...

AI Technical Summary

Problems solved by technology

The conformity between the fitting surface of the bone plate and the bone surface and the position of the screw are still not ideal, and clinicians need to make multiple comparisons and shaping, resulting in time-consuming, labor-intensive and low-efficiency surgery

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