Bone Remodeling Mechanism

Bone remodeling (or bone metabolism) is a lifelong process where mature bone tissue is removed from the skeleton (a process called bone resorption) and new bone tissue is formed (a process called ossification or new bone formation). These processes also control the reshaping or replacement of bone following injuries like fractures but also micro-damage, which occurs during normal activity. Remodeling responds also to functional demands of the mechanical loading.
Bone homeostasis involves multiple but coordinated cellular and molecular events.Two main types of cells are responsible for bone metabolism: osteoblasts (which secrete new bone), and osteoclasts (which break bone down). The structure of bones as well as adequate supply of calcium requires close cooperation between these two cell types and other cell populations present at the bone remodeling sites (eg. immune cells).Bone metabolism relies on complex signaling pathways and control mechanisms to achieve proper rates of growth and differentiation. These controls include the action of several hormones, including parathyroid hormone (PTH), vitamin D, growth hormone, steroids, and calcitonin, as well as several bone marrow-derived membrane and soluble cytokines and growth factors (ex. M-CSF, RANKL, VEGF, IL-6 family...). It is in this way that the body is able to maintain proper levels of calcium required for physiological processes. Thus bone remodeling is not just occasional "repair of bone damage" but rather an active, continual process that is always happening in a healthy body.

[@aleynacabuk3689]

your videos are refreshing when i need to understand the topic's logic. Thank you sir

[@hussainbiology]

thanks for appreciation.. glad it helps ✌️

[@himanshushekhar815]

Not Osteoblasts, Osteocytes sense the micro crack.

[@caitlankelly4367]

I really appreciate the help, thank you.

[@hussainbiology]

thanks for appreciation..Glad it helps ✌️

[@user-oq2qu4sh4o]

Thanks

[@francescoapg]

well done

[@michaeleisenberg7867]

Hello Shabir!! Really nice!! Thank you. Best Wishes, Mike

[@hussainbiology]

Hello Dr Mike.. Thanks for appreciation...✌️✌️

[@commonfiles2034]

What is the span of this entire cycle of bone remodelling or is it a continuous process?

[@Hamed46313]

is there a pathway other than RANKL pathway ?

[@manikandanr7389]

Your video is very useful. But if you tell slowly it may be more better.

[@hussainbiology]

okay sir

[@rishabhs007]

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