Munster's Ben Healy is set to make his Scotland debut after being named among the replacements for Saturday's Guinness Six Nations clash against Italy (12.30pm, live on RTÉ2 and RTÉ Player).The former Ireland Under-20s back qualifies for Scotland through his mother and ahead of next season's move to Edinburgh was named in Gregor Townsend's squad in January but had yet to feature across the team's four games to date.Healy had recently found himself third-choice out-half at Munster, behind Ireland internationals Joey Carbery and Jack Crowley.Finn Russell, who was injured in the defeat to Ireland, is replaced at fly-half by Blair Kinghorn, with 23-year-old Tipperary man Healy included on the bench.Versatile Edinburgh back Kinghorn played in the role on six consecutive occasions last year and appeared to have become Townsend’s favoured fly-half option before Russell (above) returned to the scene midway through the autumn Tests and reclaimed the position with a string of stunning displays.Glasgow’s Ollie Smith – who made his debut on last year’s summer tour of South America – fills in for Stuart Hogg, also injured against Ireland, at full-back.The third enforced change to the starting XV sees Edinburgh lock Sam Skinner take the place of Richie Gray, who suffered a blow to the ribs against Ireland last Sunday.In the only unenforced alteration to the starting line-up, Edinburgh flanker Hamish Watson comes in for Matt Fagerson, who drops to the bench.Cam Redpath is on the bench for the first time in the tournament.Scotland: Ollie Smith; Kyle Steyn, Huw Jones, Sione Tuipulotu, Duhan van der Merwe; Blair Kinghorn, Ben White; Pierre Schoeman, George Turner, Zander Fagerson; Sam Skinner, Jonny Gray; Jamie Ritchie, Hamish Watson,