News: Bone agent linked to problems in neck surgeries (AP) Bone agent linked to problems in neck surgeries (AP) ================================================================================ by team on 30 June, 2009 11:02:12 AP - A bone growth agent used in thousands of spinal fusion surgeries for neck pain has been linked to complications and higher cost, according to the first nationwide study of the product. Safety questions arose last year about the protein product, BMP, when used in fusion surgeries in the neck region, a use not approved by federal regulators.