Cases
Hipped on 3-matic
Designing a custom three-flange cup prosthesis in about an hour!
Typically the design of a custom “three-flange” prosthesis for revision hip surgeries is a very complex and time-consuming task, since it requires the integration of anatomical structures into the design. The flanges need to fit perfectly on the patient’s degenerated bone. This entails incorporating scanned anatomical data into the design.
3-matic’s advanced tools allow you to create such custom designs quickly and easily, because you can combine scanned data (the patient’s hip) directly with CAD data (the socket of the prosthesis). You’ll save a huge amount of time because you eliminate the first step of complex reverse engineering of the scanned data to a CAD format. In addition, the software offers several advanced operations that make it easy to further alter the design, ensuring a perfect fit.
Easy design with integrated anatomical structures The patient’s hip is scanned and Mimics software transforms the resulting images into a lifelike 3D model. Next, both this 3D model of the hip and the most appropriate standard fl ange cup, available as a CAD model, are loaded into 3-matic. After the cup has been positioned correctly onto the socket of the hip joint (see Fig. 1), the custom design adaptations on the cup can begin. This process easily yields a perfect fit with the bones.
Briefly, 3-matic facilitates the design of a three-flange cup, based on the patient’s anatomy, like this:
By simplifying the bone’s very detailed geometry, we ensure that the subsequent design operations will be simpler. That’s why first a simplified working model is made.
3-matic’s advanced tools allow to quickly create curves and to draw sketches, which we use to manipulate the model. 3-matic’s sophisticated surface construction functionality enables to create a new surface that bridges the socket in a single mouseclick. This will be a great help to design flanges that fit perfectly on the bone and in the cup.
The flanges are sketched in 2D (see Fig. 2). Next, this design is projected in 3D on the hip surface to cut out the flanges. Once the thickness of the resulting surfaces is assigned, the flanges are a fact (see Fig. 3).
The flanges and the flange cup are combined into one model, where the flanges are trimmed to the outer surface of the cup.
Finally, the perforations required to secure the three-flange cup on the patient’s bone during surgery are designed. This is simply done by drawing circles in a sketch (see Fig. 4) and applying these circles on the designed cup (see Fig. 5).
Time-savings through uniform treatment of various data
3-matic is an ideal tool for integrating anatomical structures into a design. Such designs are impossible in CAD software without lengthy reverse engineering. 3-matic reverses that process for you. Thanks to its various import modules, you can treat scanned and CAD data uniformly, achieving fast, accurate results.
In addition, 3-matic is triangle-based software, facilitating design automation and simplifying a lot of tasks that are hard to do in traditional CAD. One such task is adapting scanned data, which can be large and complex. 3-matic also allows you to create, select, separate or combine surfaces with ease.
What do you gain?
Significant time savings: with 3-matic, design time for a three-flange prosthesis is reduced to about an hour, as opposed to the eight hours you’d need to achieve the same results with traditional CAD software!
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When to choose 3-matic for implant design:
Request more information at 3-matic@materialise.be |
Contact us via medical@materialise.com
