The Oklahoma Mission of Mercy is a free, two-day dental clinic taking place in the Payne County Expo Center in Stillwater on Feb. 7 and 8. The event space will be transformed into a fully-functional dental facility with more than 1,500 volunteer dental and general professionals offering a variety of services including cleanings, fillings, extractions, root canals on front teeth and limited ways to improve the smile line at no cost to patients.