Extent of Inflammation and Foreign Body Reaction to Porous Polyethylene In Vitro and In Vivo

In Vivo
Tobias VollkommerMartin Gosau

Abstract

High-density porous polyethylene (PP) offers possibilities for reconstruction in craniofacial surgery. The purpose of this study was to evaluate the extent of inflammation and foreign body reactions to PP in vitro and in vivo. Cell attachment, proliferation and expression of inflammatory cytokines were assessed using murine macrophages (RAW 264.7) on two different PP materials in vitro. In vivo, Balb/c mice received PP implants at their dorsum. After sacrifice, samples were analyzed histologically and real-time PCR was used to assess expression of inflammatory cytokines. Cells showed a significantly decreased proliferation (p<0.001) after 48 h and a significantly increased expression of TNF-α (p<0.05) at 24, 48 and 72 h. All animals showed foreign body cell reactions and signs of chronic inflammation. Expression of all but one of the investigated cytokines dropped to non-significant levels after an initial increase. Application of porous polyethylene can cause local chronic inflammatory reactions. Although clinical application seems to be immunologically safe, indication and risks should be evaluated carefully when using PP implants.

Citations

Mar 4, 2020·Inflammation·Marcela Guimarães Takahashi de LazariPaula Peixoto Campos
May 13, 2020·Journal of Periodontal & Implant Science·Teerapan SosakulJintamai Suwanprateeb
Jan 31, 2021·Tissue Engineering and Regenerative Medicine·Timon HussainSebastian Strieth
May 22, 2021·Frontiers in Bioengineering and Biotechnology·Fu WeiQuanyi Guo

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