In situtations where the local host damage (either traumatic or iatrog
enically induced) is the predominant co-factor for the development of
infection, the antibiotic or other pharmacological reduction of the ba
cterial colonisation is of secondary or no importance at all. On the o
ne hand, excellent hygienic conditions have reduced more and more the
relative importance of the bacterial contamination in aseptic procedur
es. On the other hand, the surgical-technical evolution in the last 5
years (such as biological osteosynthesis, unreamed intramedullary nail
ing, stepwise procedures in complex fractures, initial open wound trea
tment and very early plastic reconstruction in open fractures) could c
reate a significant improvement of the conditions concerning preventio
n and treatment of infection. Therefore, the relative importance of as
sociated antibiotic treatment has to be considered to be essentially l
ower.