Osteoblasts are specialized cells involved in bone formation and bone remodelling. They are not typically used as stem cell treatments but rather are a part of the natural bone healing and regeneration process in the body.

In the context of stem cell treatments related to bones and orthopedic conditions, the focus is on using various types of stem cells to promote bone healing and regeneration, rather than directly using osteoblasts. These stem cells can include:

1. Mesenchymal Stem Cells (MSCs): MSCs have the potential to differentiate into osteoblasts and are used in research and clinical trials for bone regeneration in conditions such as non-union fractures, osteoporosis, and orthopedic injuries.
2. Bone Marrow Stem Cells: Stem cells derived from bone marrow, which contain MSCs, are sometimes used to promote bone healing and regeneration in orthopedic procedures.
3. Adipose-Derived Stem Cells: Stem cells from adipose (fat) tissue also have the potential to differentiate into bone-forming cells and are investigated for their use in bone regeneration.
4. Bone Grafting: Autologous (from the patient’s own body) or allogeneic (from a donor) bone grafts can be used in orthopedic surgeries to provide a scaffold for bone regeneration, and they contain osteoblasts and other cells that support bone healing.

These stem cell-based approaches are researched and applied to improve the healing of fractures, enhance bone density, and address various orthopedic conditions. The goal is to accelerate and improve the bone healing process, particularly in cases of nonunion fractures, osteoporosis, and other bone-related issues.