There are two ways to make sure your mesh will result in a strong 3D print and Meshmixer can help you out with both of those:
Meshmixer allows the user to analyze the mesh in real time for weak areas and shows a color range to highlight the weakest areas.
Some prints withstood more than 10x the force before breaking.
For thickening the thin areas, it's very easy to paint in a stronger section. The dense meshes below are the bones of a hand and the interface is still quick and manageable.
You can see some video footage of the structural analysis and stress testing in the video below. Even better, get Meshmixer and try it out for yourself! The full details of this research entitled Cross-sectional Structural Analysis for 3D Printing Optimization is available on AutodeskResearch.com.
Cross-sectional Structural Analysis for 3D Printing Optimization