The Edinburgh star's inclusion is the only change to the starting line-up made by head coach Gregor Townsend from the side which defeated England last time out at Murrayfield.
Looking ahead to the prospect of facing unbeaten Ireland in Dublin, he added: "We need to put them under pressure, something we were able to do against England in different ways but it is a lot more hard to win away from home".
"Garry's been extraordinary when he has played for us, he's done a great job". We're hoping he can get straight back into that form.
And Maitland, who scored in the win over England, understands how big a challenge they face when they travel to Dublin on Saturday, with table-toppers Ireland chasing the Grand Slam.More news: Stocks wobble on news of Cohn, China
Ireland team to play Scotland: 15 R Kearney, 14 K Earls, 13 G Ringrose, 12 B Aki, 11 J Stockdale, 10 J Sexton, 9 C Murray; 1 C Healy, 2 R Best, 3 T Furlong, 4 J Ryan, 5 D Toner, 6 P O'Mahony, 7 D Leavy, 8 CJ Stander.
It means Furlong for Porter is one of just two changes in Schmidt's selection with the other seeing Garry Ringrose come in for the injured Chris Farrell.
Both Henderson and Furlong missed the win over Wales with hamstring problems, but Joe Schmidt may have one eye on a potential championship decider away to England in Twickenham by keeping the Ulster lock in reserve as Toner retains his position alongside James Ryan.
Rob Kearney, who will win his 82nd cap from fullback on Saturday, echoed those sentiments and said there are no concerns among the playing group about Ringrose slotting back in alongside Bundee Aki.
Jordi Murphy is also named among the replacements, taking over from Jack Conan.