First to clear it up: there may be some esoteric PT expertise I'm unaware of here, but I don't think your spine is now crooked due to your injury. I think you may be holding it in an awkward, bent position to avoid pain, but I really don't think the structure of your spinal lateral curvatures changes due to a disc injury. The key thing here, I think, is if you are doing that, to stop holding it in that crooked way just as absolutely soon as possible, so it doesn't become your embedded pattern.
That said, I don't recommend being overly aggressive on your return. It's the easiest way to re-tweak something before it's fully healed, a mistake I've made myself several times, and seen others make innumerable times.
On the other hand however, you don't need to start really light and slowly work your way back up once you really do feel fine. Instead, start light the first time to make sure and test it out and see how it feels both during and after the workout (and the next day) is a good first step. Then do another workout, heavier, but not immediately back to old working weight, and make the same evaluations. Then if you're fine, go back up in bigger jumps so you're there quickly. If you're not fine yet then you've just saved yourself a lot of potential trouble. Then you stay light, or wait longer altogether, as symptoms dictate.
I am absolutely NOT saying these are the exact #s you'll use, but just an illustrative example.
First workout back: 95x5, 135x5, 185x5 - all feels ok during, all feels ok after.
Next workout, a couple days later: 135x5, 185x5, 225x5 - all feels ok during and after.
Assuming everything continues to feel fine,
Next workouts: 275x5, 315x5, 355x5, 385x5, 405x5 - or something like that, with appropriate reduction in DL frequency as the weight goes back up towards your old working weight.