50 Channeled Surgical Retractor 50 Channeled Surgical Retractor SR50 Used to hold mucoperiosteal flaps, cheeks, lips and tongue away from the surgical area. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.