Richard Smith from Sheffield University's department of child dental health tries out a new dental imaging system developed by the department.
It uses a digital camera linked to a personal computer to measure parts of the dental system. the information can be used to study normal and abnormal dental development.
A suspended director of Tayside health board has resigned the day before he was due to face charges of gross misconduct at a disciplinary hearing.
Director of commissioning Nigel Young announced his resignation 13 months after he was initially suspended following allegations of overpayments to senior managers.
An independent inquiry into the affair, the Kilshaw report, said Mr Young received£10,450 in alleged overpayments.
Solicitors have been asked to recover this money.
In total, more than£113,051 of overpayments were sanctioned between 1995 and 1997.
A board spokesperson said it had also asked lawyers to try to recover£16,000 from former general manager Lesley Barrie, who retired last year after two months on extended leave.
The spokesperson said: 'Tayside health board does not believe it is a coincidence that Mr Young has chosen to resign a matter of hours before this disciplinary hearing was scheduled to take place. The Kilshaw report established that Mr Young was one of a small group of very experienced senior managers who breached NHS pay regulations, repeatedly exceeded their delegated authority and took decisions from which they and their peers stood to benefit personally.'
Mr Young's letter of resignation claimed that the board was in 'material breach of the contract of employment' and said there has been 'a prejudiced campaign' to force him to resign.
In response the board said: 'Tayside health board strongly refutes any suggestion that it acted unfairly at any time, that it prejudiced any issue or indulged in any procedural impropriety in instigating and establishing disciplinary procedures against Mr Young.'
The Scottish Office backed the board in a statement, saying: 'The health board has followed proper procedures in carrying out its further investigation.
'Mr Young seeks to make capital from alleging that other health boards have not been targeted for similar investigation. He may wish to note that the Accounts Commission, which has responsibility for the overall external audit of all NHS bodies, gave unqualified audit certificates to all health boards for the period in question bar one: Tayside.'
All staff members who were overpaid have been sent a letter requesting repayment. More than£50,000 has already been recovered through voluntary means.
Royal College of Nursing professional officer Gordon Wenham said: 'I believe this outcome leaves many issues unresolved and many staff remaining within the board are deeply unhappy with the situation. Nurses within the board who were paid additional pay increases were asked for the money back.
'Yet individuals who gave themselves pay rises are able to resign or retire early with pay packages.
'The only conclusions staff can come to is that there is one rule for them and one for the management,' he added.
Mr Young was not available for comment.