bone lengthening is already possible although not without extreme sacrifice. but id like to think that in the coming years and with more demand (specifically in asia), people from this field would find a way to make this kind of surgery easier, shorter and safer.
This is more a cosmetic type of surgery rather than orthopaedics even if bones and surrounding tissues are involved.
When I talk about orthopaedic problem I speak about ligaments regeneration, cure for scoliosis, posture problems, bone fractures and regeneration etc..
Although I know height is your problem and today is possible to have a surgery. Italy has with France the best doctors for height related problems. So I heard in on article years ago. But the procedure is invasive, painful and rehabilitation long.
One way to make limbs increasing would be in a combination of growth hormone and stem cells. there is a small chance that you can increase length without surgery.
The alternative is to produce 3d bone with scaffolds. at one point the scaffold melt leaving an healthy bone tissue with out screws or anything. cuts will be also more precise. this should make rehabilitation easier.