S4S Dental Laboratory

S4S Dental is a UK-based specialist dental laboratory and medical device manufacturer focused on custom dental appliances and related services for dental professionals and patients. The company operates in snoring and obstructive sleep apnoea, bruxism, orthodontics, sports mouthguards, and dental whitening, and also offers clinician education and digital workflow support. Its branded offerings include Smilelign clear aligners, SCi sleep/clench appliances, Sleepwell sleep-related devices, and Vitalisse whitening systems. S4S manufactures products in-house in Sheffield and positions itself as an independent dental laboratory serving a large network of dentists across the UK and internationally.