Skip to main content
. 2020 Mar 25;10(4):605. doi: 10.3390/nano10040605

Table 2.

Results of individual studies: MTT assay, absorbance values, 570 nm.

Studies Type of Study Biomaterials Bone Regeneration Measurement Results
[18] In vitro
  • a)

    2% and 3% (w/v) CS gel (Sigma-Aldrich, Germany) + 100 ng basic fibroblast growth factor (Sigma-Aldrich, Germany)

  • b)

    2% and 3% (w/v) CS (Sigma-Aldrich, Germany) combined with 1.25% (w/v) hydroxyhapatite (BioRad, USA) + 100 ng basic fibroblast growth factor (Sigma-Aldrich, Germany)

  • c)

    CS (Sigma-Aldrich, Germany) combined with 1.25% (w/v) hydroxyapatite (BioRad, USA)

  • d)

    CS alone (Sigma-Aldrich, Germany)

MTT assay of CB and PDLCs (absorbance values, 570 nm) at day 8 and 7 respectively
  • a)

    PDLCs = 0.9; CB = 0.85

  • b)

    PDLCs = 1; CB = 1.7

  • c)

    PDLCs = 0.6; CB = 0.5

  • d)

    PDLCs = O.6; CB = 0.6

[20] In vitro
  • a)

    1.1% (w/v) CS (Sigma-Aldrich Germany) combined with 2% (w/v) alginate (Fluka AG, Germany) and 2% (w/v) PLGA (Sigma-Aldrich, Germany) + 100 ng IGF-1 (R&D, USA) and 25 ng BMP-6 (USCN, China)

  • b)

    1.1% (w/v) CS (Sigma-Aldrich, Germany) combined with 2% (w/v) PLGA (Sigma-Aldrich, Germany) + 100 ng IGF-1 (R&D, USA) and 25 ng BMP-6 (USCN, China)

  • c)

    CS (Sigma-Aldrich Germany) combined with alginate (Fluka AG, Germany)

  • d)

    CS (Sigma-Aldrich Germany)

MTT assay of CB (absorbance values, 570 nm) at day 12
  • a)

    CB = 2.6

  • b)

    CB = 2.5

  • c)

    CB = 2.4

  • d)

    CB = 2

[28] In vivo (left dorsal subcutaneous area in athymic mice)
  • a)

    CS (Sigma, St. Louis, MO, USA) dissolved in 2% acetic acid solution + β-tricalcium phosphate (Sigma–Aldrich Com) scaffold (mass ratio of β-tricalcium phosphate and CS = 3:7; total concentration = 1%)

  • b)

    CS alone (Sigma, St. Louis, MO, USA)

MTT assay of PDLCs (absorbance values, 570 nm) at day 6
  • a)

    PDLCs = 1

  • b)

    PDLCs = 0.9

[37] In vitro/in vivo (alveolar bone defects of mixed breed dogs)
  • a)

    CS solution (Sigma-Aldrich Chemical Co., St. Louis, MO, USA) and β-glycerolphosphate hydrogel (E. Merck, Darmstadt, Germany)

  • b)

    CS powder and β-glycerolphosphate hydrogel (E. Merck, Darmstadt, Germany)

  • c)

    Negative control

MTT assay of PDLCs (absorbance values, 490 nm) at day 6
  • a)

    PDLCs = 0.7

  • b)

    PDLCs = 0.6

  • c)

    PDLCs = 0.65

BMP-6 = bone morphogenetic protein-6; CB = cementoblasts; IGF-1 = insulin-like growth factor-1; MTT = 3-(4, 5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide; PDLCs = periodontal ligament cells; PLGA = polylactic-co-glycolic acid.