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US 8,821,557 B2Granted
Surgical fastener with predetermined resorption rate
AssigneeCovidien LP
InventorsRalph Robert Corradi, David N. Fowler, Christopher J. Criscuolo, Earl Zergiebel, Michael Bettuchi, Frank J. Viola
Life of this patent
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Abstract
A resorbable screw fastener and a method of firing with an applicator capable of applying a surgical fastener to tissue in order to form tissue connection to secure objects to tissue, the fastener including a body portion having a helical thread, a head portion disposed at the proximal end of the body portion. The resorbable screw fastener is 100% resorbed in vivo during a period of time ranging from about 14 days to about one year after implantation.
Claims20
A resorbable screw fastener, comprising:
- a body portion defining a longitudinal axis and having a proximal end and a distal end, the distal end having a distal surface extending non-perpendicularly relative to the longitudinal axis, the body portion having a helical thread formed thereon, the helical thread defining a substantially flattened surface formed in an outermost diameter of the helical thread;
- and
- an unthreaded head portion disposed at the proximal end of the body portion and defining a longitudinal axis, the head portion having a proximal end and a distal end, the distal end of the head portion having a distal surface extending non-perpendicularly relative to the longitudinal axis, the unthreaded head portion including a substantially flattened surface formed in an outermost diameter thereof, wherein the substantially flattened surface of the unthreaded head portion is in radial registration with the substantially flattened surface formed in an outermost diameter of the helical thread, wherein the substantially flattened surface formed in the outermost diameter of the helical thread projects partially radially inward from the outermost diameter of the helical thread.
A resorbable screw fastener, comprising:
- a body portion defining a longitudinal axis and having a proximal end and a distal end, the distal end having a distal surface extending non-perpendicularly relative to the longitudinal axis, the body portion having a helical thread formed thereon, at least a portion of the helical thread including a recess formed in an outer radial edge thereof;
- and
- an unthreaded head portion disposed at the proximal end of the body portion and defining a longitudinal axis, the head portion having a proximal end and a distal end, the distal end of the head portion having a distal surface extending non-perpendicularly relative to the longitudinal axis, the unthreaded head portion having a driver receiving structure formed thereon,
- wherein the driver receiving structure comprises a recess formed in the outer radial edge of the unthreaded head portion, the recess formed in the unthreaded head portion being substantially in radial registration with the recess formed in the helical thread.
1 more element
Dependencies are inferred from the claim text.