How to fill gap in TIN?

I use Microstation V8i Select series 2 and GEOPAK. I've created a TIN from survey data, but the data shots  in a few small areas are not close enough, there fore they didn't triangulate between them.  I know I could redo the processing and set the tolerance farther, but the TIN has already had quite a bit of manual cleaning up, so I don't want to redo anything.  Is there a way to manually have the software triangulate between theses points?