If you can’t run DirectX graphics in the OpenDental chart or if your chart is drawing slowly in Open Dental, download and install this version of the DirectX SDK, install it, then restart your computer and try to the DirectX option in OD. It is much smoother and faster than the OpenGL version.
When restarted, launch Open Dental, go to the graphics menu in the file menu. Click on a “setup number” with high numbers (try different ones if one doesn’t work) in the the Open Dental graphics setup. This should fix your issue.