Implant with reinforced resorbable stem

Claim 1

A method for installation of a prosthetic implant comprising the steps of: a. providing a functional implant component adapted to remain in permanent contact with a bone; b. forming a portion of the component in contact with the bone so that bony ingrowth can attach directly thereto; c. opening a cavity in the bone; d. placing the functional component against the bone; e. providing an anchor having a nonresorbable core surrounded by a resorbable sleeve which has a length and a periphery formed for firmly engaging the cavity so that a cross section of the core is sufficiently smaller than a cross section of the cavity so that contact between the bone and the core following resorption of the sleeve is prevented, the core extending over a major portion of the length of the sleeve; f. inserting the anchor into the cavity so that the anchor is substantially immovably disposed within the cavity; g. fixedly securing the component to the anchor so that the component is in contact with bone surrounding the cavity; h. growing bone proximate the cavity into the portion of the component to thereby permanently fix the component to the bone; and i. substantially completely resorbing the anchor after the completion of the promoting step so that natural tissue can grow back into the cavity; whereby the core remains permanently in the cavity and is spaced from the surfaces of the cavity so that there is substantially no load transference between the bone and the core.

Claim 2

A method for installation of a prosthetic implant comprising the steps of: a. providing a functional implant component adapted to remain in permanent contact with a bone; b. forming a portion of the component in contact with the bone so that bony ingrowth can attach directly thereto; c. opening a cavity in the bone; d. placing the functional component against the bone; e. providing an anchor having a nonresorbable core surrounded by a resorbable sleeve which has a length and a periphery formed for firmly engaging the cavity so that a cross section of the core is sufficiently smaller than a cross section of the cavity so that contact between the bone and the core following resorption of the sleeve is prevented, the core extending over a major portion of the length of the sleeve; f. inserting the anchor into the cavity so that the anchor is substantially immovably disposed within the cavity; g. fixedly securing the component to the anchor so that the component is in contact with bone surrounding the cavity; h. growing bone proximate the cavity into the portion of the component to thereby permanently fix the component to the bone; and i. substantially completely resorbing the anchor after the completion of the promoting step so that natural tissue can grow back into the cavity; whereby the core remains permanently in the cavity and is spaced from the surfaces of the cavity so that there is substantially no load transference between the bone and the core.

Claim 8

A method for installation of a prosthetic implant comprising the steps of: a. providing a functional implant component adapted to remain in permanent contact with a bone; b. forming a portion of the component in contact with the bone so that bony ingrowth can attach directly thereto; c. opening a cavity in the bone; d. placing the functional component against the bone; e. providing an anchor having a nonresorbable core surrounded by a resorbable sleeve which has a periphery formed and dimensioned for firmly engaging a cavity defining surface of the bone while maintaining sufficient spacing between the core and the cavity surface to prevent bone from contacting the core after a resorption of the sleeve; f. giving the core a length so that it extends over a major portion of a length of the sleeve; g. inserting the anchor into the cavity so that the anchor is substantially immovably disposed within the cavity; h. fixedly securing the component to the anchor so that the component is in contact with bone surrounding the cavity; i. growing bone proximate the cavity into the portion of the component to thereby permanently fix the component to the bone; and j. substantially completely resorbing the sleeve after the completion of the promoting step so that natural tissue can grow back into the cavity without being able to reach the core; whereby the core remains permanently in the cavity and remains spaced from the surface of the cavity after the resorption of the sleeve so that there is substantially no load transference between the bone and the core.

Claim 9

A method for installation of a prosthetic implant comprising the steps of: a. providing a functional implant component adapted to remain in permanent contact with a bone; b. forming a portion of the component in contact with the bone so that bony ingrowth can attach directly thereto; c. opening a cavity in the bone; d. placing the functional component against the bone; e. providing an anchor having a nonresorbable core surrounded by a resorbable sleeve which has a periphery formed and dimensioned for firmly engaging a cavity defining surface of the bone while maintaining sufficient spacing between the core and the cavity surface to prevent bone from contacting the core after a resorption of the sleeve; f. giving the core a length so that it extends over a major portion of a length of the sleeve; g. inserting the anchor into the cavity so that the anchor is substantially immovably disposed within the cavity; h. fixedly securing the component to the anchor so that the component is in contact with bone surrounding the cavity; i. growing bone proximate the cavity into the portion of the component to thereby permanently fix the component to the bone; and j. substantially completely resorbing the sleeve after the completion of the promoting step so that natural tissue can grow back into the cavity without being able to reach the core; whereby the core remains permanently in the cavity and remains spaced from the surface of the cavity after the resorption of the sleeve so that there is substantially no load transference between the bone and the core.

Claim 10

A method for installation of a prosthetic implant comprising the steps of: providing a permanent, functional implant component; opening a cavity in the bone; providing an anchor a nonresorbable core surrounded by a resorbable sleeve, the sleeve having a given length extending into the cavity and the core extending over a major portion of the given length of the sleeve, the sleeve having a wall thickness selected so that when the anchor is placed in the cavity a surface of the sleeve snugly engages the bone surrounding the cavity and thereby fixes the anchor relative to the bone, the thickness of the sleeve being further selected to maintain a spacing between the bone and the core which is sufficient to prevent the bone, following a resorption of the sleeve, from growing into contact with the core to prevent bony ingrowth into the core; inserting the anchor into the cavity to substantially immovably position it therein; securing the component to the anchor so that a portion of the component is in contact with the bone in a vicinity of the cavity; growing bone into the portion of the component to thereby permanently fix the component to the bone; and resorbing the sleeve so that thereafter the core remains nonfunctionally in the cavity while bony ingrowth into the component permanently secures the component to the bone.

Claim 11

A method for installation of a prosthetic implant comprising the steps of: providing a permanent, functional implant component; opening a cavity in the bone; providing an anchor a nonresorbable core surrounded by a resorbable sleeve, the sleeve having a given length extending into the cavity and the core extending over a major portion of the given length of the sleeve, the sleeve having a wall thickness selected so that when the anchor is placed in the cavity a surface of the sleeve snugly engages the bone surrounding the cavity and thereby fixes the anchor relative to the bone, the thickness of the sleeve being further selected to maintain a spacing between the bone and the core which is sufficient to prevent the bone, following a resorption of the sleeve, from growing into contact with the core to prevent bony ingrowth into the core; inserting the anchor into the cavity to substantially immovably position it therein; securing the component to the anchor so that a portion of the component is in contact with the bone in a vicinity of the cavity; growing bone into the portion of the component to thereby permanently fix the component to the bone; and resorbing the sleeve so that thereafter the core remains nonfunctionally in the cavity while bony ingrowth into the component permanently secures the component to the bone.