title: [Research on the osteogenic ability of 3-Ds interconnected porous titanium].
abstract: OBJECTIVE
  To evaluate the osteogenic ability of the three-dimensional interconnected porous titanium(TDIPT) coated with bonelike apatite, by the test of the culture of osteoblast in vitro.
  
  
  METHODS
  The pure TDIPT was prepared by the high temperature insostatic pressing (HIP) and was divided into two groups. One group of TDIPT was dipped into the 1.5 simulated body fluid (1.5 SBF) and developed the TDIPT coated with bone-like apatite (The test group). Another group was control group (pure TDIPT). The porous titanium of the two groups were all made into standard parts (5 mm x 5 mm x 4 mm) and placed into the 24-hole plates. The osteoblasts were extracted from SD rat. After the primary culture and subculture of the osteoblast in vitro, the osteoblasts were inoculated into the samples in the 24-pole plate and cultured continually. MTT Cell Proliferation Assay was done on the 1st, 3rd, 5th, 7th and 9th day respectively after inoculating. The ALP activity was tested on the 7th, 14th and 21st day, respectively. The collected data were analyzed by use of the student t test.
  
  
  RESULTS
  The MTT value and the ALP activity increased with the increasing of the culture time in the two group, but those of the test group was more significant than those of the control group (P < 0.05). Moreover, the osteoblast tachyauxesis and stable adhesion were observed in test group by SEM at the 7th day after culturing.
  
  
  CONCLUSIONS
  The bioactivity of the TDIPT improves significantly after coating with the bone-like apatite onto the surface of the TDIPT.
authors.affiliation: The General Hospital of PLA, Beijing 100853, China.
authors.forename: Guo-qiang
authors.initials: GQ
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Jie-mo
authors.initials: JM
authors.lastname: Tia
authors.forename: Ning
authors.initials: N
authors.lastname: Wen
authors.forename: Li-min
authors.initials: LM
authors.lastname: Dong
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Chai
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D002478:Cells, Cultured; D005260:Female; D008297:Male; D008855:Microscopy, Electron, Scanning; D010006:Osteoblasts / Q000502:physiology* / Q000648:ultrastructure; D010012:Osteogenesis; D016062:Porosity; D051381:Rats; D017207:Rats, Sprague-Dawley; D014025:Titanium / Q000737:chemistry*
chemical_list: D014025:Titanium; D000469:Alkaline Phosphatase