Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
권호 표지

Improved cell adhesion to ion beam-irradiated biodegradable membranes

이온빔조사에 의한 생분해성 차폐막의 세포부착력 증진에 관한 연구

  • Lee, Yong-Moo (Department of Periodontology, College of Dentistry, Seoul National University) ;
  • Park, Yoon-Jeong (Department of Industrial Pharmacy, College of Pharmacy, Ewha Womans University) ;
  • Lee, Seung-Jin (Department of Industrial Pharmacy, College of Pharmacy, Ewha Womans University) ;
  • Ku, Young (Department of Periodontology, College of Dentistry, Seoul National University) ;
  • Rhyu, In-Chul (Department of Periodontology, College of Dentistry, Seoul National University) ;
  • Han, Soo-Boo (Department of Periodontology, College of Dentistry, Seoul National University) ;
  • Choi, Sang-Mook (Department of Periodontology, College of Dentistry, Seoul National University) ;
  • Chung, Chong-Pyoung (Department of Periodontology, College of Dentistry, Seoul National University)
  • 이용무 (서울대학교 치과대학 치주과학교실) ;
  • 박윤정 (이화여자대학교 약학대학 물리약학교실) ;
  • 이승진 (이화여자대학교 약학대학 물리약학교실) ;
  • 구영 (서울대학교 치과대학 치주과학교실) ;
  • 류인철 (서울대학교 치과대학 치주과학교실) ;
  • 한수부 (서울대학교 치과대학 치주과학교실) ;
  • 최상묵 (서울대학교 치과대학 치주과학교실) ;
  • 정종평 (서울대학교 치과대학 치주과학교실)
  • Published : 1998.12.31
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Abstract

Ion irradiation is a very promising tool to modify the chemical structure and physical properities of polymers. This study was aimed to evaluate the cellular adhesion to ion beam-irradiated surface of biodegradable poly-l-lactide(PLLA) membrane. The PLLA membrane samples were irradiated by using 35 KeV $Ar^+$ to fluence of $5{\times}10^{13}$, $5{\times}10^{14}$ and $5{\times}10^{15}\;ion/cm^2$. Water contact angles to control and each dose of ion beam-irradiated PLLA membranes were measured. Cultured fetal rat calvarial osteoblasts were seeded onto control and each dose of ion beam-irradiated PLLA membranes and cultured. After 24 hours, each PLLA membranes onto which osteoblasts attached were examined by scanning electron microscopy(SEM). Osteoblasts were removed from each PLLA membrane and then, the vitality and the number of cells were calibrated. Alkaline phosphatase of detached cells from each PLLA membranes were measured. Ion beam-irradiated PLLA membranes showed no significantly morphological change from control PLLA membranes. In the measurement of water contact angle to each membrane, the dose range of ion beam employed in this study reduced significantly contact angles. Among them, $5{\times}10^{14}\;ion/cm^2$ showed the least contact angle. The vitalities of osteoblastes detached from each membranes were confirmed by flow cytometer and well attached cells with their own morphology onto each membranes were observed by SEM. A very strong improvement of the cell adhesion and proliferation was observed for ion beam-irradiated surfaces of PLLA membranes. $5{\times}10^{15}\;ion/cm^2$ exhibited the most strong effect also in cellular adherence. ALPase activities also tended to increase in ion beam-irradiated membranes but statistical differences were not found. These results suggested that ion beam irradiation is an effective tool to improve the adhesion and spreading behaviour of the cells onto the biodegradable PLLA membranes for the promotion of membrane-tissue integration.

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