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Periodontal stem cell transplantation shows promise
Date:4/11/2011

Tampa, Fla. (April 11, 2011) Periodontal ligament stem cells (PDLSCs) have been found to be the most efficacious of three kinds of clinically tested dental tissue-derived stem cells, reports a study published in the current issue of Cell Transplantation (20:2), freely available on-line at http://www.ingentaconnect.com/content/cog/ct/.

According to researchers in Seoul, South Korea, transplantation of PDLSCs into beagle dogs modeled with advanced periodontal (gum) disease that affected their premolars and molars, which are morphologically similar to the corresponding areas in human dentition, was most effective. PDLSCs showed the best regenerating capacity of the periodontal ligament (which attaches the tooth to the alveolar bone in which the teeth sit), alveolar bone, cementum (material that comprises the surface of a tooth's root), peripheral nerve and blood vessels when compared to similar transplants using dental pulp stem cells (taken from the center of teeth) or periapical follicular stem cells (taken from the developing root).

"Periodontitis, characterized by bone resorption, periodontal pocketing and gingival inflammation, is the most common cause of tooth loss in adults and affects 10 to 15 percent of adults worldwide," said corresponding author Dr. Pill-Hoon Choung of the Seoul National University School of Dentistry. "Our study sought to evaluate the effectiveness of autologous stem cell transplantation (i.e. transplant of a patient's own cells) using three kinds of autologous dental stem cells similar to mensenchymal stem cells."

Past efforts at improving periodontal regeneration included xenogenic (from a different species) bone particle graft using growth factors, but the clinical results were generally unsatisfactory, said the researchers.

In their stem cell transplant study, Dr. Choung's group found PDLSCs to be most efficacious of the three cell types since
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Contact: David Eve
celltransplantation@gmail.com
Cell Transplantation Center of Excellence for Aging and Brain Repair
Source:Eurekalert

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