Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (30): 4837-4841.doi: 10.3969/j.issn.2095-4344.2015.30.016

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Biocompatibility of polytetrafluoroethylene combined with type I collagen as a nose filler material

Yin Zhong-pu1, Sun Xiao2   

  1. 1Department of Otolaryngology-Head and Neck Surgery, Nanyang Centre Hospital, Nanyang 473003, Henan Province, China; 
    2Department of Gastroenterology, Nanyang Centre Hospital, Nanyang 473003, Henan Province, China
  • Online:2015-07-16 Published:2015-07-16
  • About author:Yin Zhong-pu, Master, Associate chief physician, Department of Otolaryngology-Head and Neck Surgery, Nanyang Centre Hospital, Nanyang 473003, Henan Province, China

Abstract:

BACKGROUND: Polytetrafluoroethylene (PTEE) as a nose filler material has advantages on the resistant to corrosion, chemical stability and so on. However, its linear expansion coefficient is large easily leading to infection and rejection, and its application has some limitations.

OBJECTIVE: To compare the cell toxicity, inflammatory infiltrates and biocompatibility indexes in vivo between PTEE and PTEE combined with type I collagen.

METHODS: MTT method was used to detect the relative proliferation rate of L929 cells cultured with PTEE extract or PTEE combined with type I collagen extract; an electron microscope was used to observe the cell growth. PTEE or PTEE combined with type I collagen was embedded under the nasal dorsal fascia of New Zealand white rabbits for 7 days, and hematoxylin-eosin staining was used to detect whether nasal mucosa epithelial tissue had inflammatory infiltration. Systemic toxicity, allergies, pyrogen reaction and deaths of rabbits were observed after injection of two kinds of material extracts by ear vein.

RESULTS AND CONCLUSION: The cytotoxicity and inflammatory infiltration were milder in PTEE combined with type I collagen group than PTEE group (P < 0.05). The allergic reactions and pyrogen reactions were fewer in PTEE combined with type I collagen group than PTEE group (P < 0.05). These findings indicate that PTEE 
combined with type I collagen as the nose filler material has better biocompatibility. 

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

Key words: olytetrafluoroethylene, Collagen Type I, Biocompatible Materials

CLC Number: