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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0188477 (1988-04-29) |
| 발명자 / 주소 |
|
| 인용정보 | 피인용 횟수 : 560 인용 특허 : 5 |
A customized human joint prosthesis replicating the primary contours and dimensions of a patient\s bone is designed and manufactured utilizing an average anatomical bone shape. The average anatomical bone shape is generated by digitizing and storing in a computer memory the average three dimensional
A customized human joint prosthesis replicating the primary contours and dimensions of a patient\s bone is designed and manufactured utilizing an average anatomical bone shape. The average anatomical bone shape is generated by digitizing and storing in a computer memory the average three dimensional shape of a significant number of actual bone portions corresponding to the bone portion to be replaced by the prosthesis. Thereafter, the scale of the patient\s bone is determined by measuring the outside dimensions of the patient\s bone in at least one plane parallel to the longitudinal axis of that bone. The average anatomical shape then is adjusted to form a first synthesized shape which conforms to that scale. Subsequently, the actual shape of the bone of the patient is measured along a plurality of longitudinally spaced lines in at least one plane normal to the longitudinal axis of the patient\s bone. The first synthesized shape is then adjusted to form a second synthesized shape conforming to the measured shape of the patient\s bone. The second synthesized shape is manufactured by CAD/CAM or other suitable means.
A method for making a prosthesis for a human joint bone comprising the steps of: determining the average anatomical three-dimensional shape of said bone by taking a sampling of a statistically significant number of actual bones, digitizing their three-dimensional shapes, correlating them proportiona
A method for making a prosthesis for a human joint bone comprising the steps of: determining the average anatomical three-dimensional shape of said bone by taking a sampling of a statistically significant number of actual bones, digitizing their three-dimensional shapes, correlating them proportionally as to overall size, and averaging them; b. storing said digitized average shape; c. determining the outside dimensions of the patient\s corresponding bone on at least one plane parallel to the longitudinal axis of the bone; d. deriving a first synthesized shape by adjusting the scale of the stored average shape to conform to the scale of the patient\s bone; e. determining the difference between the shape of the patient\s bone and the first synthesized shape on a plurality of longitudinally-spaced lines in said at least one plane normal to the longitudinal axis of said bone; f. deriving a second synthesized shape by adjusting the first synthesized shape to conform its entire surface to the differences so determined at each respective line; and g. fabricating the prosthesis using the second synthesized shape.
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