CAD CAM for AFOs
Chris Vlahopoulos
Description
Collection
Title:
CAD CAM for AFOs
Creator:
Chris Vlahopoulos
Date:
11/13/2012
Text:
Hi all
I've been using the Rodin4D CAD-CAM program for rectifying my jobs for the last 3 years. Depending on the patient, I may obtain measurements by directly scanning the patient, using th STS sock (which I then scan) or casting the patient with POP or synthetic plaster (where I scan the positive model). I am talking about lower and upper limb orthotics. Depending on the method I use each time, I have to adjust the radius of the models. The company people advised me to increase the models radius by 1.5mm - 2mm compared to the patient's actual measurements otherwise the fit is extremely tight, which is true.
Working on a model which was obtained directly from scanning the patient (no casting) and then increasing the radius tool by 1.5 - 2mm depending on the patient, works very good and it's very precise. The problems begin when I have to scan the STS sock (which has a uniform thickness) where I have to estimate how much to reduce the total radius, where the results I get vary.
The actual question is, does any of you use CAD CAM for lower limb polyprop AFOs, and if you have to do the same thing. Better again, if someone has experience on the RODIN4D program, and what method do you use regarding the total dimensions of the model. The whole thing seems weird since with traditional manufacturing we don't increase the dimensions of the cast, on the contrary I usually take some plaster off.
Thanks
Chris Vlahopoulos, CPO
I've been using the Rodin4D CAD-CAM program for rectifying my jobs for the last 3 years. Depending on the patient, I may obtain measurements by directly scanning the patient, using th STS sock (which I then scan) or casting the patient with POP or synthetic plaster (where I scan the positive model). I am talking about lower and upper limb orthotics. Depending on the method I use each time, I have to adjust the radius of the models. The company people advised me to increase the models radius by 1.5mm - 2mm compared to the patient's actual measurements otherwise the fit is extremely tight, which is true.
Working on a model which was obtained directly from scanning the patient (no casting) and then increasing the radius tool by 1.5 - 2mm depending on the patient, works very good and it's very precise. The problems begin when I have to scan the STS sock (which has a uniform thickness) where I have to estimate how much to reduce the total radius, where the results I get vary.
The actual question is, does any of you use CAD CAM for lower limb polyprop AFOs, and if you have to do the same thing. Better again, if someone has experience on the RODIN4D program, and what method do you use regarding the total dimensions of the model. The whole thing seems weird since with traditional manufacturing we don't increase the dimensions of the cast, on the contrary I usually take some plaster off.
Thanks
Chris Vlahopoulos, CPO
Citation
Chris Vlahopoulos, “CAD CAM for AFOs,” Digital Resource Foundation for Orthotics and Prosthetics, accessed November 2, 2024, https://library.drfop.org/items/show/234110.
