# Converting a mesh surface discretized region to a solid region

What is the best way to convert a mesh surface region into a solid region?

For example, we can obtain a mesh region of the surface of the left femur as follows.

lf=DiscretizeGraphics[Entity["AnatomicalStructure", "LeftFemur"]["Graphics3D"]];
SolidRegionQ[lf]
(*False*)
Area[lf]
(*61 317.9*)
Volume[lf]
(*0*)


R = BoundaryMeshRegion[MeshCoordinates[lf], MeshCells[lf, 2]];

• Or just directly lf = BoundaryDiscretizeGraphics[..]. – Michael E2 Apr 24 '18 at 12:20