Transparency and complex 3D object

Hello,
My application builds a complex 3D object.
With huge data (coordinates and points connections) the application generates a shape based
on the TriangleStripArray primitive. (minimum 15000 triangles)
The problem is that when I enable the transparency mode, the rendering isn't correct.
That's not really a surprise unfortunately...
Any idea on how to fix this ???
Is there a way to render transparency correctly on a such object, independantly from the view point ?
Thx in advance

Imagine rendering a human brain on screen, it's quite a complex 3d object because of
the internal structures like encephal for example.
All the mesh is based on little triangles which compose the TriangleStripArray object.
Each face is visible from it's two sides: Im using front and back culling.
The blending fonction I'm using is the default one.
Depending on the view point, some internal parts disappear : I can see the background
through some triangle faces.. It whould be better to see triangles faces which are behind.
I tried some tricks I've found on J3D.org but.. no success: other problems appears.
Unfortunately it's impossible to give you a screenshot, that's not for public domain.
Thanx in advance for any idea or solution

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