triceratops
Original model from GLView 4.30 http://home.snafu.de/hg/

Initial tetrahedral mesh has 12,426 vertices, all on the boundary surface.

Triangular boundary surface mesh of the initial mesh.

There are 5,636 tetrahedral elements with minimum dihedral angle less than five degree.

After sink-insertion, 563 small slivers survived.

There are 18 slivers left after sliver-exudation.
Number of tetrahedra is decreased from 190,602 to 185,303.
Overall distribution of minimum dihedral angle is also improved.