Joe Biden struggles to keep his teeth in his mouth during Democratic debate

Joe Biden may have been biting off more than he could chew in a bizarre moment during Thursday night’s Democratic debate — which some claimed was his attempt to rein in his falling teeth.

The gaffe-prone 76-year-old was asked why voters should give him a second chance to pass gun control measures after none were signed into law after the Sandy Hook massacre when he was vice president.

“Because I’ve got it done before. I’m the only one up here that’s ever beat the NRA. Only one to beat the NRA nationally. I brought the Brady Bill into focus and became law,” Biden answered as he moved his mouth uncomfortably.

“I was expecting one of Biden’s arms or ears or his nose to fall off during the debate. Instead it was just his false teeth that malfunctioned,” user Howie Klein tweeted.

“Was it just me or did it look like Biden’s teeth almost fell out and then he was fixing it with his tongue?” asked another user, Thomas McDonald.

In another cringeworthy episode involving his body, Biden’s left eye filled with blood during a CNN climate change town hall.

A broken blood vessel in the eye can be caused by several things, including hypertension, blood thinners or even excessive straining.

In 1988, the then-senator suffered a burst aneurysm that required him to undergo emergency surgery, according to the Washington Examiner.

Months later, doctors clipped a second aneurysm before it burst.

“They literally had to take the top of my head off,” he once said in describing the operation, which led him to take a seven-month leave from the Senate.

Biden apparently has undergone significant cosmetic surgery in recent decades, including getting hair plugs, Botox injections and veneers.