NHS dentists are facing over a hundred million pounds worth of financial penalties for under delivering on their agreed General Dental Service Contracts following their first year of operation with local primary care trusts (PCTs).According to new research conducted under the Freedom of Information Act by the private dental plan administrator DPAS, many NHS dentists nationally are failing to meet their Units of Dental Activity (UDA) targets. It discovered that some five million UDAs have gone undelivered for the year 2007/08 and that the PCTs would be pursuing claw back where contracts had delivered more than a 4% shortfall, including several that had chosen not to do this last year.