Complex sentence: In this role antibiotics suppress the infection until local measures can be carried out, e.g. severe trismus may occur in when the muscles of mastication are involved in an odontogenic infection, making any surgical treatment impossible.
Split into simpler sentences: In this role, antibiotics suppress the infection until local measures can be carried out. Severe trismus may occur in when the muscles of mastication are involved in an odontogenic infection, making any surgical treatment impossible.