You'd have to write "... permanent injuries or even death, which inflict great pain ..."
In fact, you should. Your original is not a good sentence. You're trying to put too much into one sentence.
"When we read newspapers or watch TV news, every day we see heart-rending scenes of accidents which cause permanent injuries or even death. These injuries inflict great pain on the victims' families." That's one improvement. Naturally, there are others.
You could leave out the two 'often's. There are too many time adverbials.
Retired English Teacher