Tapered Osteochondral Implant
An apparatus and methods are provided for a tapered implant for treating osteochondral defects. The tapered implant comprises a top portion that includes a shape that approximates an osteochondral surface to be replaced. A bottom portion of the tapered implant is configured to be implanted into a hole drilled in bone. A cylindrical sidewall of the tapered implant has a diameter that decreases from a first diameter of the top portion to a second diameter of the bottom portion. The tapered implant comprises any monophasic synthetic material suitable for implantation into bone, including any of silicone, bioglass, peek, polyethylene, titanium, and cobalt chrome.
1 . An implant for treating osteochondral defects, comprising:
a cylindrical member comprised of a monophasic synthetic material;
a top portion comprising a first diameter;
a bottom portion comprising a second diameter; and
a tapered sidewall portion disposed between the top portion and the bottom portion.
2 . The implant of claim 1 , wherein the tapered sidewall portion includes a diameter that decreases from the first diameter to the second diameter.
3 . The implant of claim 2 , wherein the tapered sidewall portion comprises a degree of tapering that is configured to prevent the implant from subsiding into the hole drilled in bone.
4 . The implant of claim 1 , wherein the implant includes a surface area ranging between substantially 6 square inches and substantially 17 square inches.
5 . The implant of claim 1 , wherein the monophasic synthetic material includes any one of silicone, bioglass, peek, polyethylene, titanium, and cobalt chrome.
6 . The implant of claim 1 , wherein the first diameter and the second diameter are selected according to a location in a patient that is to be treated.
7 . The implant of claim 6 , wherein a height of the cylindrical member is substantially 10 millimeters (mm), and the first diameter ranges between substantially 5 mm and substantially 10 mm.
8 . The implant of claim 1 , wherein the top portion includes a shape configured to approximate an osteochondral surface to be replaced.
9 . The implant of claim 8 , wherein the shape includes a curvature of the top portion that approximates the curvature of the osteochondral surface to be replaced.
10 . The implant of claim 9 , wherein the curvature is either convex or concave so as to match the anatomy of the osteochondral surface.
11 . The implant of claim 1 , further comprising a rounded periphery that joins the top portion and the tapered sidewall portion, the rounded periphery providing a smooth contact surface to surrounding tissues.
12 . The implant of claim 1 , further comprising a rounded periphery that joins the tapered sidewall portion and the bottom portion, the rounded periphery providing a smooth transition surface between the tapered sidewall portion and the bottom portion.
13 . A sterile instrument kit for repairing osteochondral defects, the instrument kit comprising:
one or more tapered implants configured to treat osteochondral defects in various bone joint locations in a patient's body, the one or more tapered implants each comprising monophasic synthetic material; and
a multiplicity of instruments including any one or more of an implant inserter, a guidewire, a cannulated reamer, a punch, and a size gauge, the multiplicity of instruments being configured for implanting the one or more tapered implants into the patient's body such that the implant is flush or slightly proud of a surrounding native cartilage surface.
14 . The instrument kit of claim 13 , wherein the one or more tapered implants and the multiplicity of instruments are packaged together in an exterior container suitable for delivery to a practitioner.
15 . The instrument kit of claim 14 , wherein the one or more tapered implants are stored in a first sterile container.
16 . The instrument kit of claim 15 , wherein any one or more of the guidewire, the cannulated reamer, the punch, and the implant inserter are stored in a second sterile container.
17 . The instrument kit of claim 16 , wherein the size gauge is stored in a third sterile container.
18 . A method for a sterile instrument kit for repairing osteochondral defects, comprising:
configuring one or more tapered implants to treat osteochondral defects in various bone joint locations in a patient's body; and
combining the one or more tapered implants with a multiplicity of instruments configured for implantation of the one or more tapered implants into the patient's body, the multiplicity of instruments including at least a guidewire, a cannulated reamer, a punch, and a size gauge.
19 . The method of claim 18 , wherein configuring comprises forming the one or more tapered implants of a monophasic synthetic material, including any or one of silicone, bioglass, peek, polyethylene, titanium, and cobalt chrome.
20 . The method of claim 18 , wherein configuring comprises foil ling the one or more tapered implants such that the diameters of a top portion of the one or more tapered implants range from substantially 5 mm to substantially 10 mm.
21 . The method of claim 20 , wherein combining further comprises:
storing the one or more tapered implants in a first sterile container;
storing any one or more of the guidewire, the cannulated reamer, the punch, and an implant inserter in a second sterile container; and
storing the size gauge in a third sterile container.