Polysilane methacrylic compounds and methods of making them

A method of treating a bone injury or a bone condition comprising locally administering to a subject in need thereof at a bone injury site or a site affected by a bone condition an effective amount of a composition comprising a compound having a formula (IV):

• wherein each of R1, R2, R3, R4, R5, R6, and R7 is selected from the group consisting of H, alkyl, alkenyl, alkoxy, aryl, aralkyl, cycloalkyl, heterocyclyl, heteroaryl groups, hydroxyl, or halo, and n is independently for each occurrence an integer from 1 to 1000000.