Abstract Two new bismethacrylamide (1, 2) and two new methacrylamide (3, 4) dental monomers were synthesized. In each group, one monomer contains a bisphosphonate group, the other a bisphosphonic acid group. Monomer 1 and 3 were synthesized by amidation of 2-(2-chlorocarbonyl-allyloxymethyl)-acryloylchloride and methacryloyl chloride with tetraethyl aminomethyl-bis (phosphonate) and converted to the bisphosphonic acid ...