Apparatus and method of determining acetabular center axis
OwnerSam Hakkiinventor
Life of this patent
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Abstract
An apparatus and method is disclosed for aligning the anteversion and the inclination of an acetabular prosthetic cup within an acetabulum of a patient. The apparatus and method comprises calculating the orientation of acetabulum center axis. The acetabular prosthetic cup is aligned relative to the calculated acetabulum center axis. The acetabulum center axis is calculated from selecting rim points located about the acetabulum of the patient.
Claims14
The method of aligning the anteversion and the inclination of an acetabular prosthetic cup within an acetabulum of a patient, comprising:
- determining the orientation of acetabulum center axis;
- and
- aligning the acetabular prosthetic cup relative to the acetabulum center axis.
A method of determining the acetabulum center axis of a patient, comprising the steps of:
- selecting three rim points (A, B, C) about the acetabulum of the patient;
- determining a first geometric point (D) substantially equidistant from the three rim points (A, B, C);
- determining a second geometric point (E) displaced outwardly from the first geometric point (D) substantially equidistant from the three rim points (A, B, C);
- and
- creating a line (D-E) intersecting the first geometric point (D) and the second geometric point (E) to provide a line indicative of the acetabulum center axis of a patient.
A method of determining the acetabulum center axis (D-E) of a patient, comprising the steps of:
- selecting three rim points (A, B, C) about the periphery of the acetabulum of the patient;
- determining a first geometric point (D) substantially equidistant from the three rim points (A, B, C);
- determining a second geometric point (E) displaced outwardly from the first geometric point (D) substantially equidistant from the three rim points (A, B, C);
- and
- creating a line (D-E) intersecting the first geometric point (D) and the second geometric point (E) to provide a line (D-E) indicative of the acetabulum center axis of a patient.
An apparatus for determining the acetabulum center axis of an acetabulum of a patient, comprising:
- a sensor for sensing selected points about the acetabulum of the patient;
- a calculator for computing the acetabulum center axis of the patient;
- and
- an indicator for indicating the acetabulum center axis of a patient.
An apparatus for determining an acetabulum center axis of an acetabulum of the patient:
- comprising;
- a sensor for sensing three rim points (A, B, C) about the acetabulum of the patient;
- a calculator for calculating the spatial relationship of said three rim points for computing a first geometric point (D) substantially equidistant from the three rim points (A, B, C);
- said calculator computing a second geometric point (E) displaced outwardly from the first geometric point (D) substantially equidistant from the three rim points (A, B, C);
- and
- an indicator for indicating a line (D-E) intersecting the first geometric point (D) and the second geometric point (E) to provide a line indicative of the acetabulum center axis of a patient.
Dependencies are inferred from the claim text.