Modeling with advanced techniques > Surfacing tools > Basic surfacing > Reintersect faces
  
Reintersect faces
The Reintersect function can be used to
Join neighboring faces, whether the reintersection generates another face part or a solid part.
Close gaps between neighboring faces of imported parts to create a solid part. When importing face parts, you may sometimes notice small gaps along the face edges. This usually means that the faces of the face part connect at their vertices but not along all edges.
To reintersect gaps around a face, simply specify that face. The face extends until it intersects its neighboring faces. To close a specific gap, specify an edge at the gap.
Both reintersect operations (by face or by edge) extend and reintersect all faces that are local to all open edges connected to the selected edge or face.
Faces must have common vertices before they can be reintersected
The figure shows how a gap between neighboring faces can be reintersected by selecting an edge (1).
The figure shows how a gap between neighboring faces can be reintersected by selecting a face (1).
To reintersect faces,
1. Click 3D Geometry and then, in the 3D Surface Tools group, click Reintersect Faces. The Reintersect Faces dialog box opens.
2. Click one of the following:
Face to specify faces.
By Edge to specify faces by their edges.
3. Specify the face or edge.
4. Click to complete the operation.
* 
Changes in topology are not possible with Reintersect.