The man started having falls soon after moving into a facility in regional Queensland in 2017, the aged care royal commission heard.

"Within three months of being admitted to residential aged care, our dad had gone from being an active and able-bodied man to being bedridden and unable to even feed himself," one of his daughters said.

The woman, who can only be identified as Ms FA, said there was often no staff around when she and her sisters visited their father.

She recalled one particularly distressing incident a few days before Christmas last year, when she found her father stuck half off his lowered bed, with his upper body on the floor.

"Dad was lying on the floor in his own filth, unable to call out for help and looking very distressed," Ms FA told the Cairns hearing on Wednesday.

The man was originally in a secure dementia unit at the facility before being moved to another unit in June last year.

The 85-year-old man was moved to a new facility in March this year.

Ms FA said she had since learned her father had been chemically restrained at the first facility, but a nurse in his new centre said he did not need sedatives.

She said her father is no longer in a semi-conscious state and his personality has started to show through the dementia.

"Within the first week of dad being in facility two I visited dad and I thought to myself he looks like dad again. He looks relaxed and happy."

Ms FA said minimum staff to resident ratios were required, especially in high-care areas like dementia units.

"It is unacceptable that an active, physically fit man could enter an aged care facility to be cared for in his last years and within three months be permanently bedridden from injuries sustained while unsupervised.

"The older generation deserves better than this and my father, who is paying the maximum amount for his care, certainly deserved better."

Australian Associated Press