TACK-HEALING: #scifi In Healing broken bones, the growth of calcification tends to be much slower than aligning the bone fragments and forcing rapid growth of cartilage. The most common way of Healing such injuries is to use Healing to align bone fragments  and accelerate cartilage growth, known as tack-healing because the bone, while “mended,” has only a fraction of normal strength. The patient is then instructed to avoid putting excessive stress on the damaged bone while calcification is occurring.