The families of 2 patients who died on the operating table during spine surgery involving the use of Synthes’ Norian XR bone cement are suing the company and 4 former executives for wrongful death and elder abuse, according to the Philadelphia Inquirer.

The lawsuit, filed in California Superior Court, was brought by the families of Ryoichi Kikuchi and Barbara Marcelino, both 83. They died after surgeons injected the bone cement during their procedures, but there is no definitive link between their deaths and use of the cement as a cause of death, according to the newspaper.