title: [A model for studying on mechanical responses of osteoblast seeded in three dimensional scaffold].
abstract: OBJECTIVE
  To establish a model for studying on mechanical responses of osteoblasts seeded in 3 dimensional(3D) scaffold.
  
  
  METHODS
  Fifty pieces of bio-derived cancellous bones, whose holes were 500 to 800 microm and density was 0.36 to 0.45 g/cm3, were obtained as the scaffolds. They were cultured with the third passage suspension of Wistar rat. Twenty-four of the 50 scaffolds were constructed under apparent strain sine waveform with amplitude of 1 000 microepsilon, frequency of 3 Hz, and duration of 3 min/d, as experimental group. The other scaffolds were control group. After 3-day coculture, osteoblasts were observed with scanning electron microscope. The proliferation of the osteoblasts was checked by MTT on scheduled date.
  
  
  RESULTS
  Scanning electron microscopic observation showed that osteoblasts attached and spread on the trabeculae, which presented the validity of the model under proper mechanical condition. Experiment showed that mechanical environment promoted the proliferation of osteoblasts. The observation of proliferation of osteoblasts showed that the quantity of osteoblasts in the experimental group was higher than that in the control group 1, 4, 8, 12, 16, 20, 24, and 28 days after culturing. There was significant difference between the two groups 12, 16, 20, 24, and 28 days after culturing (P < 0.05).
  
  
  CONCLUSIONS
  The establishment of the model can facilitate the study of mechanical responses of osteoblasts under different conditions.
authors.affiliation: Institute of Medical Equipment, Academy of Military Medical Science, Tianjin 300161, PR China. z56787@sohu.com
authors.forename: Chunqui
authors.initials: C
authors.lastname: Zhang
authors.forename: Xizheng
authors.initials: X
authors.lastname: Zhang
authors.forename: Yong
authors.initials: Y
authors.lastname: Guo
mesh_terms: D000818:Animals; D018786:Bone Substitutes; D018929:Cell Culture Techniques; D049109:Cell Proliferation; D002478:Cells, Cultured; D019563:Mechanics; D008954:Models, Biological; D010006:Osteoblasts / Q000166:cytology / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar; D023822:Tissue Engineering
chemical_list: D018786:Bone Substitutes