Fenestrated bone screw and method of injecting bone cement into bone structure

A method of injecting bone cement into surrounding bone structure, said method comprising the steps of:

• Installing a bone screw into bone structure, said bone screw having a shank, a tip, and a head, at least a portion of said shank have threads thereon, said shank having a cannula extending from said head, a plurality of fenestrations extending outwardly from said cannula, said head having a central opening with the inner portion of said central opening being in communication with said cannula and with the outer portion of said central opening being configured to receive a driving tool for driving the screw into bone structure, said inner portion of said central opening being configured to be sealably coupled to and uncoupled from a supply of bone cement so that bone cement may be delivered to said cannula and forced out of said fenestrations into said bone structure adjacent said fenestrations;
• Sealably connecting said supply of bone cement to said screw;
• and
• Injecting bone cement into said cannula of said bone screw and into said bone structure proximate said fenestrations.

A method of injecting bone cement into surrounding bone structure, said method comprising the steps of:

• a. Installing a plurality of bone screws into adjacent bone structure, each said bone screw having a shank, a tip, and a head, at least a portion of said shank having threads thereon, said shank having a cannula extending lengthwise of the screw, a plurality of fenestrations extending outwardly from said cannula, said head having a central opening with the outer portion of the opening configured to receive a driving tool for driving the screw into bone structure, said central opening in said head having an inner portion configured to sealably receive a cement delivery tube so that a suitable bone cement may be injected into said cannula of said screw and forced out of said fenestrations and into the surrounding bone structure;
• b. Sealably connecting one of said cement delivery tubes to each said screw;
• c. Connecting a cement pump to a first one of said cement injection tubes;
• d. Injecting cement into said cannula of a first one said bone screw and into said bone structure proximate said first screw;
• e. Removing said cement pump from said first cement injection tube substantially without leakage of cement adjacent the head of said first screw;
• f. Connecting said cement pump to a second cement injection tube;
• g. Injecting cement into the cannula of a second of said bone screws;
• and
• h. Removing said cement injection tube from its respective said second screw substantially without leakage of cement adjacent the head of said second screw.