Dentists across the country are running out of surgical masks and could soon be forced to close their practices, the Australian Dental Association has warned.

Unprecedented demand for masks due to the coronavirus meant supplies at a large number of dental practices were expected to be gone within a month, the association's deputy CEO Eithne Irving said.

"Without surgical masks, dentists cannot treat patients safely and we run the risk of people going without treatment," Ms Irving said.

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Dentists across Australia are facing closure due to a shortage in face masks. (Getty)

Naomi Arnold is the co-owner of Dental on Macquarie in South Hobart.

Ms Arnold said her practice used about 90 masks a day and would be left with no choice but to close if they ran out.

"We have really stringent infection control guidelines that we need to operate under and there is absolutely no way that we can practice without dental masks," Ms Arnold told nine.com.au.

While the practice was still receiving limited stock from its regular suppliers, it was unknown how long this would continue, she said.

Staff at the Dental on Macquarie practice in South Hobart are worried about a shortage of masks. (Supplied)

The practice had been bolstering its supplies by buying extra masks through online sites such as Amazon, but these were now sold out, Ms Arnold said.

The closure of her practice and others across the country would have a significant impact on patients in the community, she said.

"Obviously for our patient base they won't have access to emergency dental treatment if they need it."

The Australian Dental Association (ADA) estimates that Australian dentists use about 9.5 million masks a month and called on the Federal Government to secure the industry's supply.

The ADA had been advised that dentists could not access the government's stockpile of masks, but that government was close to securing deals with two Australian manufacturers. Ms Irving said.