(Meth)-acrylic acid esters of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen, chlorine, fluorine or a C.sub.1 - to C.sub.4 -alkyl radical and R.sup.3 and R.sup.4 are identical or different and represent the group ##STR2## wherein R.sup.5 and R.sup.6 are identical or different and denote hydrogen or methyl, Z denotes a straight-chain or branched C.sub.2 - to C.sub.8 -alkylene chain and n denotes values from 1 to 4. Such (meth)-acrylic acid esters can be used as dental fillers or to coat teeth.