Turnover for Duke Street Capital Oasis Holdings, the UK’s second largest dental provider, was £150m for the year ending March 31 2013 (2012: £148.0m) of which £89.7m (2012: £88.5m) was for provision of NHS dental services and £60.2m (2012: £59.6m) was generated by private dental services. Cost of sales was £80.1m (2012: £79.6m) and administrative…