When we break bones, how does our body know how much bone to regrow exactly the amount there was before?



Essentially, I’ve broken bones before but when they heal its never a case of excess bone created and for all intents and purposes its the exact same aesthetically once healed, but how does our body know exactly how much bone to make and where, and is there cases of it making too much bone for example so there would be “lumps” for want of a better word?

In: Biology

The body actually does create excess bone at first. This is why the area of a fracture feels raised in the initial stage of healing. Cells called osteoblasts create the bony framework that becomes calcified into mature bone. After the break is sealed then cells called osteoclasts shaves down the excess bone creating a smooth surface again