4.7 Article

Effect of starch on the mechanical and in vitro properties of collagen-hydroxyapatite sponges for applications in dentistry

Journal

CARBOHYDRATE POLYMERS
Volume 148, Issue -, Pages 78-85

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.04.056

Keywords

Starch; Collagen; Sponge; Dental filler; Blood-clotting; CollaPlug (R)

Funding

  1. University of California Institute for Mexico
  2. United States (UC MEXUS-CONACyT)
  3. National Science Foundation, Division of Materials Research [DMR1006931, DMR 1507978]
  4. Division Of Materials Research
  5. Direct For Mathematical & Physical Scien [1507978] Funding Source: National Science Foundation

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This study sought to improve the mechanical and blood-absorbing properties of collagen sponges, while keeping them compressible, by incorporating blended hydroxyapatite (HA)-starch. Results were compared with CollaPlug (pure collagen). The elastic modulus increased from 1.5 +/- 0.2 kPa for CollaPlug to 49 +/- 8 kPa for sponges with composition 1:4:10 (collagen:HA:starch, by weight). The modified microstructure and surface area provided by the starch granules on the sponges improved cell viability. Sponges with composition 1:4:10 maintained their blood-clotting capability with almost no change from 5 to 15 min after contact with blood, while CollaPlug diminished to about half its capacity to absorb blood and form clots. Incorporation of HA-starch into the sponges with composition of 1:4:10, increased the elastic modulus of the collagen-HA sponges, making them more structurally robust. The viability of cells and the blood-clotting capability increased with starch incorporation. (C) 2016 Elsevier Ltd. All rights reserved.

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