Stomatology ›› 2023, Vol. 43 ›› Issue (5): 415-420.doi: 10.13591/j.cnki.kqyx.2023.05.005

• Basic Research • Previous Articles     Next Articles

The effect of tantalum coating on the proliferation and osteogenic differentiation of human periodontal ligament stem cells

GE Xiao1,YU Miao2,WU Wei3,BI Xiuting4,WU Xiaoyan1,YU Chen1,LI Ti4()   

  1. School of Stomatology, Weifang Medical University, Weifang 261000, China
  • Revised:2023-01-18 Online:2023-05-28 Published:2023-05-31
  • Contact: LI Ti E-mail:15906368098@163.com

Abstract:

Objective To investigate the effect of tantalum-coated surface on the proliferation and ossification of human periodontal ligament stem cells(hPDLSCs). Methods The hPDLSCs were separated and cultured, with the cell identified. After polishing and cleaning of pure titanium specimens, the tantalum coating was prepared by plasma spraying technique after sandblasting and acid etching treatment. The polished titanium specimens(P group)were used as control group, and sandblasted acid-etched titanium(SLA group)and tantalum-coated titanium(Ta group)were used as test groups. The micro-morphology and elemental composition of the titanium surface of each group were analyzed by scanning electron microscopy(SEM)and energy spectrometry(EDS). The hPDLSCs were inhibited on the surface of each group of specimens, and the proliferation activity of cells was measured by CCK-8 assay. After osteogenesis induction culture, alkaline phosphatase activity assay and alizarin red staining were performed. Osteogenic gene expression was detected by qPCR. Results Tantalum coating was successfully prepared on titanium specimens. The hPDLSCs were successfully isolated and identified. The results of CCK-8 experiment showed that after 3, 5 and 7 days of culture, the OD value of Ta group was significantly higher than that of SLA and P groups(P<0.05). The results of ALP assay showed that the difference between the three groups was not statistically significant at day 7;at day 14, the ALP activity in the Ta group was significantly higher than that in the P and SLA groups(P<0.01). Alizarin red staining showed that red calcified nodules were formed on the superficial side of the materials in all three groups, and the mineralized nodules in the SLA and Ta groups were significantly more than those in the P group. The qPCR data indicated that the expression levels of ALP, RUNX2, and OCN genes were significantly higher in the Ta group than in the P group(P<0.01), and the expression of RUNX2 and OCN genes were effectively higher than that in the SLA group(P<0.01). Conclusion Tantalum coating can promote the proliferation and osteogenic differentiation of periodontal stem cells.

Key words: tantalum coating, human periodontal ligament stem cells, osteogenic differentiation

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