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Shia LaBeouf says he'll only regain about "80-something percent" of the function in his left hand, which he broke last September in a car accident.

"I've had screws and plates put in," he tells Entertainment Weekly. "They put a screw in one of my knuckles. And they shaved a piece of bone off my hip and made a [bone for my] finger out of it."

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LaBeouf -- who had his drivers license suspended for a year after the collision (he refused a breathalyzer test at the scene) -- says he's on his third surgery.

"That's coming up in a week or two [from April 2]," he says. "My middle finger is still crooked as a f---ing noodle, so they've gotta straighten it out and put a screw in it.

"I'll be able to make a fist again," he continues. "There's a knuckle I'll never be able to move again, but that's probably the only permanent damage, other than the scarring."

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LaBeouf -- who couldn't film the Transformers sequel for two weeks after the accident -- says the first voice he heard after surgery was that of Indiana Jones costar Harrison Ford.

"[He] called me on the phone and said, 'Hey, are you okay?' I said, "Yeah, I'm good." He said, "Well, then you need to get back to work." I said, "Are you serious?" He said, "That's the way this cookie crumbles." So I went back to work. The show doesn't stop for anybody," LaBeouf explains.

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He also felt guilty about missing too much time on set.

"I pride myself on my professionalism, and this is the first issue I've ever had where I wasn't able to come to set, and it's f---ing heartbreaking when you gotta look at your crew," he says.

"The thing that cut deep to the core of me was knowing that there were 65 human beings [in the crew] who are like family to me, waiting for me to come back. They were sitting on their a--es doing nothing because of know, my situation," he continues. "It's the most intense s--- I've ever dealt with, and am still dealing with. I mean, if people look at me like a drunk a--hole, that's okay. But I know my family looks at me like a whole different person, and I know my crew respects me immensely. And at the end of the day, I can't do much more."

Shooting Transformers without the use of his left hand was "the most physical thing I've ever had to do in my life," he says. "Constantly having to take hits and fall and run through explosions and get hit and beat up all day.

"Aside from my hand, I also got 25 stitches making this movie, in various parts of my body," he continues -- including getting stabbed by a prop.

"I basically stuck a f---ing sharp object through my eyelid," he says. "The doctor looks at me and he holds his thumb and forefinger about an inch apart from one another. I said, 'What is that?' He said, 'Blindness.' This is the most insane s--- I've ever been a part of."

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