Introduction of a mixture of β-tricalcium phosphate into a complex of bone marrow mesenchymal stem cells and type I collagen can augment the volume of alveolar bone without impairing cementum regeneration.

Abstract:

BACKGROUND:The purpose of this study is to evaluate whether β-tricalcium phosphate (β-TCP) could be a promising modality to help augment alveolar bone in periodontal tissue regeneration by bone marrow mesenchymal stem cells (BMMSCs). METHODS:Expanded BMMSCs and atelocollagen (Col) were mixed together (MSC/Col). A combination of β-TCP with MSC/Col was also prepared (MSC/Col/TCP). MSC/Col/TCP or MSC/Col was transplanted into experimental periodontal Class III furcation defects that had been exposed to inflammation in beagle dogs. Periodontal tissue regeneration was evaluated by histologic and morphometric analyses at 4 and 8 weeks after transplantation. RESULTS:MSC/Col and MSC/Col/TCP enhanced periodontal tissue regeneration compared to Col and TCP/Col according to hematoxylin and eosin staining. The percentage of new cementum length in the MSC/Col/TCP group was not significantly different from that in the MSC/Col group at 4 and 8 weeks. On the other hand, the percentage of new bone area in the MSC/Col/TCP group was much higher than that in the MSC/TCP group at 4 weeks. However, at 8 weeks, no significant difference in new bone area was found between the two groups. In the MSC/Col/TCP group, β-TCP was surrounded by newly formed bone. Multinucleated cells, which were positive for osteopontin and tartrate-resistant acid phosphatase, were present in the interconnected macropores of β-TCP. CONCLUSION:These findings suggest that β-TCP is applicable as a scaffold for BMMSCs transplantation and helps augment alveolar bone without impairing regeneration of cementum.

journal_name

J Periodontol

authors

Nagahara T,Yoshimatsu S,Shiba H,Kawaguchi H,Takeda K,Iwata T,Mizuno N,Fujita T,Kurihara H

doi

10.1902/jop.2014.140384

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

456-64

issue

3

eissn

0022-3492

issn

1943-3670

journal_volume

86

pub_type

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