This is an incredibly broad question with literally thousands of possible answers. The entire premise behind cell-based therapies is to replace or augment tissue or organ function with cells from the patient (autologous cell therapy) or from another patient (allogeneic). The risk of the latter is the possibility of rejection due to HLA mis-match or or other immunological discrepancies between the host and the donor. Several examples exist of preclinical trials using cell-based therapies using patient-derived mature stem cells (hematopoietic stem cells, mesenchymal stem cells, adipose stem cells).

I would recommend reading about the basics of cell therapy so that you can begin to understand the purpose, potential pitfalls and advantages, and active areas of research[Cell therapy].

Check out some related questions on cell therapy, and hopefully with more information, you can find the answer you're looking for or think of a more detailed question!

https://www.quora.com/Can-autologous-cell-therapy-revive-growth-plates-in-adults/answer/David-Belair

In the year 2000 Dr. Songtao Shi discovered that teeth, specifically dental pulp contained stem cells. He and others then went on to discover and publish that children’s primary teeth also contained stem cells, and that those cells contained special properties.

Please see the link below.

https://stm.sciencemag.org/content/10/455/eaaf3227

I heard and read those topics, which is very interesting to learn. However, I am not on the field but I am interested in the response of Sir Mohammed H. Musleh. Thanks

Please go through the attached article.