Abstract：
:Controlled delivery of bioactive molecules to modulate or control biological processes has a number of clinical applications. The present study reports a delivery system which was designed to deliver growth factors locally to a fracture site. Ethylene vinyl acetate copolymer (EVAc), bovine serum albumin (BSA) and platelet-derived growth factor (PDGF-BB) were combined and coated onto a stainless-steel Kirschner wire (K-wire). A K-wire can be used as an intramedullary nail in small animal fractures, such as the rat. PDGF-BB stimulates thymidine uptake in human bone cell cultures when released from the K-wire delivery system. BSA release was modified by providing a final coating on the K-wire of 10% pure EVAc at the end of the fabrication. Electron microscopic examination of the surface of the rods revealed different surface pores on the K-wires coated with pure EVAc. Differences in porosity and tortuosity may account, in part, for the different release kinetics observed.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Walsh WR,Kim HD,Jong YS,Valentini RFdoi
10.1016/0142-9612(95)91047-3subject
Has Abstractpub_date
1995-11-01 00:00:00pages
1319-25issue
17eissn
0142-9612issn
1878-5905pii
0142961295910473journal_volume
16pub_type
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