Wes Thomas netted his first goal in six games to help Oxford to a 3-1 win over MK Dons.U's top-scorer Thomas finished off a neat move begun by Jon Obika by turning in Gino van Kessel's pullback on 15 minutes.It was Thomas's ninth goal of the campaign but his first since November.Dons captain Alex Gilbey levelled 10 minutes later, heading in after George Williams flicked on Robbie Muirhead's corner.But after Kieran Agard headed wide from another Gilbey-inspired Dons attack, and Obika struck the bar for Oxford, the home side regained the lead on the stroke of half-time.Lee Nicholls saved Jack Payne's 20-yard drive but Thomas nicked it away and Ryan Ledson turned it across goal for Van Kessel to score.Obika fired home from eight yards to make it 3-1 just before the hour after a superb pass from Josh Ruffels.Oxford's left back Ricardinho was sent off after 82 minutes for a reckless challenge on Conor McGrandles.