3D Studio Max
Select the faces as above and erase
the ear in the scene with the head.
Ajust the scale and direction (in general
a light rotation on X and another on
axis Z for User).
To simplify the geometry use Weld Target
as in the image above.
Adjust the vertexes to give a round
form which is the part of the ear that
will connect to the head.
Put the vertexes approximately on the
see the countours of the face, and the
dimentions of the ear after adjustment
of the vertexes.
the ear and view its Properties (right
click) and Trun off BackFaces Culling.
That makes it possible to see the faces
whose normals are not directed towards
the head, activate 3d Snap in vertex
mode and with Create Vertex, create
the vertexes for the head in the same
arrangement as the ear ones (as shown)
the vertexes around the edge to give
a more regular form.
the head and then Attach. (check that
you have Editable Mesh in the pile of
both objects, if necessary, remove a
Meshsmooth and colapse the stack).
the vertexes pairs and then weld them
ear and the head should now be one with
no gaps or holes in this area.
any final adjustments of these welded
verticies to harmonize the curves of
the ear-head join.
on the images to see them large.