Andrew Hall returns to the squad for the first time this season following injury to replace Adam Brown on the bench.
Turner said: "Injuries will always happen but I am pleased to say that we have a quality player in Shaun Connor to replace James tomorrow evening.
"I am delighted to have Shaun back in the region and he will be looking to put pressure on James for his starting position.
"Similarly Jason Tovey is a great prospect for the region who will be working hard to compete for the fly-half spot against Edinburgh tomorrow."
Dragons: 15 - Phillip Dollman 14 - Gareth Wyatt 13 - Rory Sidey 12 - Ashley Smith 11 - Richard Fussell 10 - Shaun Connor 9 - Wayne Evans 1 - Adam Black 2 - Tom Willis (captain) 3 - Rhys M. Thomas 4 - Adam Jones 5 - Luke Charteris 6 - Joe Bearman 7 - Richard Parks 8 - Grant Webb
Reps: 16 - Steve Jones 17 - Hugh Gustafson 18 - Andrew Hall 19 - Jamie Ringer 20 - Rhodri Gomer Davies 21 - Jason Tovey 22 - Thomas Isaacs