I've got a question about the Deep Space Nine episode "Trials and Tribble-ations" did they use the model of the TOS bridge they made for The Next Generation episode "Relics" for the episode's bridge scenes with Sisko and Dax?

I figure they did, but is it confirmed anywhere.

I haven't been able to find anything on this either. It would make sense that they did, but I have to ask: since a lot of the "Trials" episode used "green/blue screen", maybe they didn't need to reconstruct the bridge at all? It's been a while, but the major scene I remember on the bridge (that actually involved a DS9 character) was the Sisko part at the end. Maybe he was just standing on an empty sound stage and they filled in the rest?

there was a extra about this on one of the ds9 dvds (I guess the season that ds9 episode aired) ..they sorta showed how they made that episode..mixing in the new with the old..

IIRC both episodes were done mostly with the modern actors working in front of blue screens.

In Relics, an empty bridge shot from the episode "This Side of Paradise" was used and combined with the original captain's chair and a reconstructed panel.

In Trials & Tribulations, footage from The Trouble With Tribbles and Mirror, Mirror was used as a back drop with a reconstructed panel (possibly the same one used in Relics) for the scene with Sisko & Jadzia on the bridge.

The scene from Mirror, Mirror is near the end of the episode and has Sisko replacing Marlena on a bridge scene after Kirk and the others returned from the alternate universe. (Marlena was the Captain's woman in the alternate universe).

Damfino is right about "Relics"--the wide shot was a still of the empty bridge. The section they built was more than a panel though--supposedly it was more like a pie slice shape. They would change the camera angles and swap out the graphics on the viewscreens in the background to make it seem like a much bigger area (this was explained in the behind the scenes book "Captain's Logs")

Also, sets don't stay up very long... they take up a large amount of space. Something that would be used so rarely would have been destroyed after use.