Bupa is to offer dental services in supermarkets.
The move comes following the purchase of Instore Dental Ltd (ISDL) and Store Dental Care Limited (SDC) which operate dental surgeries in six supermarkets - five in Sainsbury's supermarkets and one in a Tesco store.
Four of the clinics are in Sainsbury's stores in the Manchester region and one in Merton, London. There is a further surgery in the Tesco store in Slough.
The surgeries provide a full range of private dental services, including general, specialist and cosmetic dentistry, with appointments available seven days a week.
Patients do not need to have Bupa health insurance.
Tracey Fletcher, managing director Bupa Health Clinics, said: "It is a step closer to our aim of significantly expanding our dental business to 50 clinics and being one of the UK's biggest chains of private dentists."
These acquisitions bring the number of dental centres that Bupa operates to 21.
According to a recent Bupa survey, one-in-seven people (13%) said they would go to see their dentist more often if their practice was in a more convenient location.
Dr Lance Knight, clinical director and co-founder of Instore Dental Ltd and Store Dental Care Limited, said: "We know that people value our easy-to-reach locations and convenient appointment times with the guarantee of a quality dental service."