Protesters from the health union blocked Health Minister Michael Ferguson in his car for 12 minutes at the opening of a dental centre redevelopment in Hobart on Tuesday.
Brandishing signs that read "This is what if feels like to be ramped" and "You are now ramped", the group of about 10 protesters from the Health and Community Services Union chanted at Mr Ferguson as he sat in the car outside the Southern Dental Centre at New Town.
HACSU members had earlier sat at the office of Premier Will Hodgman for two hours demanding a meeting before getting word that Mr Ferguson would be attending the opening of the redeveloped dental centre.
Mr Ferguson said people had been calling for fewer "politics and stunts" in the protracted wage negotiations, and the union needed to act in "good faith".
MORE ON THE WAGES DISPUTE:
"Union bosses dressed in surgical gowns have reached another new low, using ambush tactics and protesting the opening of an important redeveloped health facility that is helping take pressure of the Royal," he said.
"We are working hard to help more patients get better access to care. Labor and the unions are only interested in cheap headlines and stunts."
The Southern Dental Centre redevelopment increased the centre's capacity to 27 dental surgeries with prosthetic laboratory and education centre, which Mr Ferguson said would reduce the number of people requiring hospital services.
HACSU Tasmania assistant secretary Robbie Moore said the union was resorting to these tactics in response to the refusal of Mr Ferguson and Mr Hodgman to meet them in person.
"In terms of wages, we've been asking for a meeting with the Premier for weeks," he said.
"We are using every opportunity to speak to them because they're refusing to speak to us."
Unions participated in two sets of negotiations with the government on Tuesday - one for Allied Health, and one for nurses.
Mr Moore said the government sent people who "had no power to negotiate".
"Usually when it comes time to negotiate a deal, you have people there that can actually do it. In the past, that has been politicians or senior people within the department who have that authority," he said.
The blocking of Mr Ferguson's car was the latest in the long-running, bitter public sector wages dispute.
In March, Mr Ferguson threatened to stand down health workers who took industrial action that resulted in duties not being performed, which HACSU described as "hostile and shocking".