diff --git a/vcg/complex/algorithms/create/tetramesh_support.h b/vcg/complex/algorithms/create/tetramesh_support.h
new file mode 100644
index 00000000..b45eba3c
--- /dev/null
+++ b/vcg/complex/algorithms/create/tetramesh_support.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2016                                           \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *   
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+#ifndef TETRAMESH_SUPPORT_H
+#define TETRAMESH_SUPPORT_H
+
+namespace vcg {
+namespace tri {
+
+template <class TetraMesh, class TriMesh>
+inline void CreateTriMeshFromTTBorder(TetraMesh & tetramesh, TriMesh & trimesh)
+{
+    RequireTTAdjacency(tetramesh);
+    tri::UpdateTopology<TetraMesh>::TetraTetra(tetramesh);
+    trimesh.Clear();
+
+    typedef typename TetraMesh::TetraType TetraType;
+    ForEachTetra(tetramesh, [&] (TetraType & t) {
+        for (int i = 0; i < 4; ++i)
+            if (IsTTBorder(t, i))
+            {
+                tri::Allocator<TriMesh>::AddFace(trimesh, 
+                                                 t.V(Tetra::VofF(i, 0)),
+                                                 t.V(Tetra::VofF(i, 1)),
+                                                 t.V(Tetra::VofF(i, 2)));
+            }
+    });
+
+	vcg::tri::Clean<TriMesh>::RemoveDuplicateVertex(trimesh);
+	vcg::tri::Allocator<TriMesh>::CompactEveryVector(trimesh);
+}
+
+} // end namespace tri
+} // end namespace vcg
+
+#endif // EXTRUDE_H
diff --git a/vcg/complex/algorithms/update/flag.h b/vcg/complex/algorithms/update/flag.h
index c4d74ac4..2a7957c2 100644
--- a/vcg/complex/algorithms/update/flag.h
+++ b/vcg/complex/algorithms/update/flag.h
@@ -189,7 +189,7 @@ public:
             if(!(*ti).IsD())
                 for(int j = 0; j < 4; ++j)
                 {
-                    if (tetrahedron::IsBorder(*ti,j)) (*ti).SetB(j);
+                    if (IsTTBorder(*ti,j)) (*ti).SetB(j);
                     else (*ti).ClearB(j);
                 }
     }
@@ -205,7 +205,7 @@ public:
             if(!(*ti).IsD())
                 for(int j = 0; j < 4; ++j)
                 {
-                    if (tetrahedron::IsBorder(*ti,j))
+                    if (IsTTBorder(*ti,j))
                     {
                         for (int i = 0; i < 3; ++i)
                             ti->V(Tetra::VofF(j, i))->SetB();
diff --git a/vcg/simplex/tetrahedron/topology.h b/vcg/simplex/tetrahedron/topology.h
index 74668c53..5203af47 100644
--- a/vcg/simplex/tetrahedron/topology.h
+++ b/vcg/simplex/tetrahedron/topology.h
@@ -24,9 +24,6 @@
 #ifndef _VCG_TETRA_TOPOLOGY
 #define _VCG_TETRA_TOPOLOGY
 
-#include <vcg/complex/algorithms/update/topology.h> 
-#include <vcg/complex/algorithms/clean.h>
-
 namespace vcg {
 namespace tetrahedron {
 /** \addtogroup tetrahedron */
@@ -37,7 +34,7 @@ namespace tetrahedron {
     @return true if j is an face of border, false otherwise
 */
 template <class TetraType>
-inline bool IsBorder(TetraType const & t,  const int j )
+inline bool IsTTBorder(TetraType const & t,  const int j )
 {
   if(TetraType::HasTTAdjacency())
       return t.cTTp(j)==&t;
@@ -45,61 +42,6 @@ inline bool IsBorder(TetraType const & t,  const int j )
   return true;
 }
 
-template <class TetraMesh, class TriMesh>
-inline void TriMeshFromBorder(TetraMesh & tetramesh, TriMesh & trimesh)
-{
-    typedef typename TriMesh::VertexPointer VertexPointer;
-    typedef typename TriMesh::FacePointer     FacePointer;
-
-    RequireTTAdjacency(tetramesh);
-    tri::UpdateTopology<TetraMesh>::TetraTetra(tetramesh);
-
-    trimesh.Clear();
-
-    std::vector<VertexPointer> verts;
-    std::vector<FacePointer>   faces;
-
-    typedef typename TetraMesh::TetraType TetraType;
-    ForEachTetra(tetramesh, [&] (TetraType & t) {
-        for (int i = 0; i < 4; ++i)
-            if (IsBorder(t, i))
-            {
-                verts.push_back(t.V(Tetra::VofF(i, 0)));
-                verts.push_back(t.V(Tetra::VofF(i, 1)));
-                verts.push_back(t.V(Tetra::VofF(i, 2)));
-            }
-    });
-
-    typedef typename TriMesh::VertexIterator VertexIterator;
-    typedef typename TriMesh::FaceIterator     FaceIterator;
-    
-    VertexIterator vi = tri::Allocator<TriMesh>::AddVertices(trimesh, verts.size());
-    FaceIterator   fi = tri::Allocator<TriMesh>::AddFaces(trimesh, verts.size() / 3);
-    
-    for (int i = 0; i < verts.size(); i += 3)
-    {
-		fi->Alloc(3);
-        
-        vi->P() = verts[i + 0]->P();
-        fi->V(0) = &*vi;
-        ++vi;
-
-        vi->P() = verts[i + 1]->P();
-        fi->V(1) = &*vi;
-        ++vi;
-
-        vi->P() = verts[i + 2]->P();
-        fi->V(2) = &*vi;
-        ++vi;
-
-        ++fi;
-    }
-
-	//do it while you build the mehs
-	vcg::tri::Clean<TriMesh>::RemoveDuplicateVertex(trimesh);
-	vcg::tri::Allocator<TriMesh>::CompactEveryVector(trimesh);
-}
-
 }
 }