location in the body associated with a bony dissection where introduction of bmp into the dissection is indicated the seal 20 of the present invention is contemplated to be commercially available in a number of different sizes shapes and include various attachment means the seals preferably are packaged in separate sterile packaging and can be arranged on a tray that includes single and multiple protector devices in different sizes and embodiments the seal 20 may be constructed to be substantially pliable to allow for precise contouring of a seal that is selected from a limited selection of sizes the presence of a radiopaque material in the seal 20 permits visualization of the seal 20 by x ray radiation or the like in situations where the patient 39 s back pain persists or where subsequent surgery is contemplated the surgeon is able to determine the position of the seal device of this invention prior to or during a subsequent surgery the radiopaque substance also allows the surgeon to verify the location where the bmp was introduced as determined from the position of the seal it is contemplated that in another preferred embodiment of this invention the seal 20 is colored it is contemplated that the selected dye will contrast.