How To build a jaw

Post here for help on using FreeCAD's graphical user interface (GUI).
Vincent97
Posts: 1
Joined: Tue Apr 24, 2018 11:53 pm

How To build a jaw

Postby Vincent97 » Tue Apr 24, 2018 11:58 pm

Hello,
It's my first time with a Freed Cad. I'm a dentistry student and I'd like to know how to design a jaw ( if possible a superior and inferior jaw). I'm doing this because I'd like to add to the jaw some "screws" (implants) into the jaw.
Thanks for your attention
User avatar
hammax
Posts: 524
Joined: Thu Jan 19, 2017 5:03 pm
Location: Ammersee

Re: How To build a jaw

Postby hammax » Wed Apr 25, 2018 7:14 am

...that task is rather something like hardcore-stuff.
You can do it e.g. with a sweep or some kind of solid modeling out of a data pool.
But it's not trivial.
Jaw.PNG
Jaw.PNG (41.96 KiB) Viewed 280 times
Attachments
Jaw_0.FCStd
FC.18.13554
(170.8 KiB) Downloaded 2 times
oldmachine
Posts: 213
Joined: Wed May 31, 2017 11:49 pm

Re: How To build a jaw

Postby oldmachine » Wed Apr 25, 2018 4:05 pm

Three days ago I had a Crown put in (upper molar). Dentist has some cool gizmos and make their own Temp's. He showed me the simulated jaw with impression and the new porcelain crown. The simulated jaw he used was simply a tool to hold the tooth and not representative of my full jaw.

Having said that, the info provided by 'hammax' is correct but, you may not need a fully representative jaw - perhaps something simple would suffice. Attached is a simple sweep feature with a dummy tooth... Purpose is to give you an idea of a less complicated approach that may meet your needs... at, least as a starting point before going too complex...
MAC OSX Sierra
3D Parts & Links (made using FreeCad and Solidworks): https://www.thingiverse.com/Still_Breathing/designs
Android App & Links: https://play.google.com/store/apps/deta ... .bestknots
User avatar
hammax
Posts: 524
Joined: Thu Jan 19, 2017 5:03 pm
Location: Ammersee

Re: How To build a jaw

Postby hammax » Thu Apr 26, 2018 4:21 pm

...there is a method to model a parametric jawbone in FreeCAD by sweeping
several crosssections made by Sketcher-BSplines along a 3D-curve also made of Sketcher-Bsplines.
There are even more complex BSpline sections possible, to get a natural model.
The Sweepcurve is made of the Intersection of a horizontel and a vertical projection of the jaw geometry.
Essential is the controlled positioning of the crossections by Placement-operation to avoid twists.
The usage of Lattice2WB delivers a reliable Sweeppath. (thanks to freecad-heini).
https://forum.freecadweb.org/viewtopic.php?f=13&t=28386

Jaw_4.PNG
FC.18.13613
Jaw_4.PNG (66.7 KiB) Viewed 186 times
Attachments
Jaw4.FCStd
FC.18.13613
(96.82 KiB) Downloaded 1 time
Rod
Posts: 54
Joined: Mon Feb 22, 2016 8:32 am

Re: How To build a jaw

Postby Rod » Fri Apr 27, 2018 7:41 am

Vincent97 wrote:
Tue Apr 24, 2018 11:58 pm
Hello,
It's my first time with a Freed Cad. I'm a dentistry student and I'd like to know how to design a jaw ( if possible a superior and inferior jaw). I'm doing this because I'd like to add to the jaw some "screws" (implants) into the jaw.
Thanks for your attention
Don't know if this helps (or you consider it cheating :D ) but there seems to be an stl in the downloadable zip

https://www.thingiverse.com/thing:1006235
Tilli
Posts: 91
Joined: Thu Jan 25, 2018 10:38 pm

Medical Imaging, STL, Point-Clouds from Scans? - re: How To build a jaw

Postby Tilli » Wed May 02, 2018 7:59 pm

Vincent97 wrote:
Tue Apr 24, 2018 11:58 pm
Hello,
It's my first time with a Freed Cad. I'm a dentistry student and I'd like to know how to design a jaw ( if possible a superior and inferior jaw). I'm doing this because I'd like to add to the jaw some "screws" (implants) into the jaw.
Thanks for your attention
Hi and welcome to the forums. :)

The jaw and screws, is this a generic or specific case? Do you have or can you get scans?

There are often posts mentioning STL and even Points-Cloud stuff. I don't know whether it's doable or not, nor whether anyone in the community has the necessary the skillset and opportunity and motivation, but maybe there could be a route from scans to a model.

A little DuckDucking suggests that others are interested in Medical Visualisation using FLOSS tools.

https://stackoverflow.com/questions/348 ... ir-ct-scan

https://www.researchgate.net/post/DICOM ... conversion

https://www.slicer.org/

https://www.vtk.org/overview/

https://en.wikipedia.org/wiki/Medical_imaging

https://en.wikipedia.org/wiki/DICOM#Software

Just a thought.

But whatever, please do keep us updated.

:)