Wickens was alert and awake after being airlifted to Lehigh Valley Hospital in Allentown, Pa., for further evaluation.
The race was red flagged and drivers were allowed out of their cars.
The 29-year-old driver was attempting to pass Ryan Hunter-Reay when the two cars lightly touched.
Track workers fix the catch fence following an accident involving Verizon IndyCar Series driver Robert Wickens (not pictured) and driver Ryan Hunter-Reay (not pictured) during the ABC Supply 500 at Pocono Raceway.
IndyCar has no such system in place, but trialled a windscreen device earlier this year, although that system has not yet been introduced to cars - and whilst neither form of protection would have offered much help to Wickens, Hunter-Reay's terrifyingly vulnerable head would have been protected had Wickens's vehicle flown a little lower.
IndyCar later issued a statement advising that Wickens was "awake and alert" following the accident, which also involved three other drivers who couldn't avoid the flying debris.
Hinchcliffe, of Oakville, seemed to be in pain, grabbing his wrists as he slowly left his auto.
Dixon echoed the thoughts of the rest of the paddock when he said IndyCar was a "close-knit family" and he was thinking of Wickens.
He also closed to within just 29 points of New Zealand's Scott Dixon, who leads the championship points race with 530 points.
"It may not be the prettiest job but it's going to be safe", May said.More news: David Silva Carries His Healthy Baby Boy As Mascot For Huddersfield Game
IndyCar drivers can steel their will to put any kind of bad news behind them once they get behind the wheel and hit 220 miles per hour in an open cockpit.
It's the same track where Justin Wilson died in 2015 after being hit in the helmet by a piece of debris from a crashed auto.
"That's the worst thing you can see".
"Part of the issue is we have five drivers in here in the aftermath of that crash", IndyCar Vice President of Communications Curt Cavin said.
Bourdais said the repairs were "pretty lousy". "Hopefully, we'll see him back in the auto soon", Hinchcliffe said. The two raced each other as youngsters in Toronto and Hinchcliffe, runner-up on ABC's "Dancing With The Stars" in 2017, helped lure Wickens to IndyCar this season after a successful career in Europe. The remaining cars running were ordered to pit lane and the race halted for 1 hour, 56 minutes to allow for fix of the catch fencing.
"All 22 of us, 33 of us, whatever it may be, are a family", Rossi said.
Hinchcliffe survived his own life-threatening injury when a broken part from his vehicle pierced an artery during a 2015 crash at Indianapolis Motor Speedway.
Penske, who has 17 Indianapolis 500 victories, has long wanted to run a vehicle at the Brickyard with Stewart.
Wickens had reeled off five straight top-five finishes and is sixth in the standings. He was nursing an apparent wrist injury as he got out of his auto.