1. A method of measuring slope or tilt of a prepared bone surface of a bone comprising the steps of:
placing the bone in extension;
referencing a three-axis accelerometer to a bone landmark when the bone is in extension and where the three-axis accelerometer is configured to measure position, rotation, and tilt;
coupling the three-axis accelerometer to the prepared bone surface; and
measuring the slope or tilt of the tibial prosthetic component with the three-axis accelerometer.
2. The method of claim 1 where the step of measuring the slope or tilt of the tibial prosthetic component includes the steps of:
measuring the slope or tilt of the prepared bone surface relative to the bone landmark;
monitoring the slope or tilt on a remote system; and
storing the measured slope or tilt of the prepared bone surface.
3. The method of claim 2 further including a step of changing the slope or tilt of the bone surface after measurement.
4. The method of claim 3 further including the steps of:
placing the three-axis accelerometer on a first reference plane; and
measuring the first reference plane;
reversing a position of the three-axis accelerometer on the first reference plane 180 degrees;
measuring the first reference plane;
averaging measurements of the first reference plane; and
zeroing the three-axis acclerometer to reference to the first reference plane.
5. The method of claim 4 further including a step of zeroing the three-axis accelerometer to a second reference plane where the second reference plane is perpendicular to the first reference plane.
6. A method of measuring slope or tilt of a tibial prosthetic component coupled to a tibia comprising the steps of:
coupling a sensored insert in a joint of the muscular-skeletal system where the sensored insert has an articular surface configured to allow joint movement; and
referencing a three-axis accelerometer of the sensored insert to a tibial ridge when the tibia is in extension where the three-axis accelerometer is configured to measure position, rotation, and tilt of the sensored insert.
7. The method of claim 6 further including the steps of:
inserting the sensored insert into the knee joint;
placing the leg in extension as measured by the three-axis accelerometer; and
measuring the slope or tilt of the tibial prosthetic component with the three-axis accelerometer.
8. The method of claim 7 further including the steps of:
placing a shim on the sensored insert; and
measuring the load applied by the muscular-skeletal system to the sensored insert where the loading on the sensored insert is within a predetermined load range.
9. The method of claim 8 where the step of referencing the three-axis accelerometer further includes a step of placing a posterior edge of the sensored insert along the tibial ridge.
10. The method of claim 9 further including the steps of:
holding the sensored insert approximately vertical along the tibial ridge;
monitoring a vertical position of the sensored insert on a remote system;
referencing the three-axis accelerometer to the tibial ridge when the sensored insert is within a predetermined vertical range.
11. The method of claim 10 further including where the step of referencing the three-axis accelerometer to the tibial ridge comprises a step of referencing the three-axis accelerometer to the tibial ridge when the sensored insert is within plus or minus 2 degrees of vertical.
12. The method of claim 6 where the step of measuring the slope or tilt of the tibial prosthetic component includes the steps of:
measuring the slope or tilt relative to the tibial ridge;
monitoring the slope or tilt on a remote system; and
storing the anterior-posterior slope of the tibial prosthetic component.
13. The method of claim 12 further including a step of changing the anterior-posterior slope or tilt of the prosthetic component after measurement.
14. The method of claim 6 further including the steps of:
placing the sensored insert on a first reference plane; and
measuring the first reference plane;
reversing a position of the module on the first reference plane 180 degrees;
measuring the first reference plane;
averaging measurements of the first reference plane; and
zeroing the module to reference to the first reference plane where the first reference plane corresponds to zero gravity.
15. The method of claim 14 further including a step of zeroing the three-axis accelerometer to a second reference plane where the second reference plane is perpendicular to the first reference plane.
16. A method of referencing a three-axis accelerometer to measure location, tilt, and rotation of the muscular-skeletal system comprising the steps of:
referencing the three-axis accelerometer to a first plane where the three-axis accelerometer is referenced to gravity and where the first plane corresponds to zero gravity;
referencing the three-axis accelerometer to a second plane where the second plane is perpendicular to the first plane;
referencing a three-axis accelerometer to a bone landmark of a bone when the bone is in extension;
coupling the three-axis accelerometer to a surface of the bone; and
measuring the slope or tilt of a surface of the bone with the three-axis accelerometer relative to the bone landmark.
17. The method of claim 16 where the step of referencing the three-axis accelerometer to the bone landmark comprises the steps of:
coupling the three-axis accelerometer to the bone landmark;
monitoring a position of the three-axis accelerometer on a remote system relative to the first or second plane; and
referencing the three-axis accelerometer to the bone landmark when the three-axis accelerometer is within a predetermined range of the first or second plane.
18. The method of claim 17 further including a step of measuring a rotation of the three-axis accelerometer when placed on the bone landmark and the bone is in extension.
19. The method of claim 16 where the step of measuring the slope or tilt of the bone surface includes the steps of:
monitoring the slope or tilt on a remote system; and
storing the slope or tilt of the bone surface.
20. The method of claim 16 further including the steps of:
coupling the three-axis accelerometer to a first plane; and
measuring the first plane;
reversing a position of the three-axis accelerometer on the first plane 180 degrees;
measuring the first plane;
averaging measurements of the first plane; and
zeroing the three-axis accelerometer to reference to the first plane where the first reference plane corresponds to zero gravity.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An improved ice cream cone holder comprising:
a conical portion with an open end and a closed end configured to fit around an ice cream cone; and
at least one de-nesting formation about the open end of the conical portion, the at least one de-nesting formation being configured to inhibit vacuum formation between stacked holders.
2. The holder of claim 1 further comprising a disc portion formed about the open end of the conical portion, the disc portion including a rim about its outer periphery and the de-nesting formations being formed adjacent a juncture of the conical and disc portions.
3. The holder of claim 1 further comprising a lip of the disc portion about the open end of the conical portion.
4. The holder of claim 3 wherein the at least one de-nesting formation is formed at least partly in the lip.
5. The holder of claim 1 wherein the at least one de-nesting formation comprises at least two de-nesting formations distributed about the open end.
6. The holder of claim 5 wherein a distribution pattern of the at least two de-nesting formations varies from one holder to another holder.
7. An improved ice cream cone holder comprising:
a conical portion with an open end and a closed end;
a disc portion formed about the open end, the disc portion being substantially planar and substantially perpendicular to a longitudinal axis of the conical portion;
a rim formed on an outer periphery of the disc portion and projecting away from the open end of the conical portion and substantially parallel to the longitudinal axis of the conical portion;
at least one drainage formation adjacent a juncture of the conical portion and the disc portion, the at least one drainage formation being configured such that liquid collecting on the disc portion will pass through the at least one drainage formation before it can spill over the rim.
8. The holder of claim 7 further comprising a lip formed on the disc portion about the juncture of the conical and disc portions to inhibit entry of liquid collecting on the disc portion.
9. The holder of claim 8 wherein the at least one drainage formation is in the lip.
10. The holder of claim 7 wherein at least two drainage formations are distributed about the open end of the conical portion.
11. The holder of claim 10 wherein a distribution pattern of the at least two drainage formations varies from one holder to another holder.
12. A method of using an ice cream cone holder comprising
providing at least one holder by:
providing a conical portion with an open end and a closed end configured to fit around an ice cream cone; and
providing at least one de-nesting formation about the open end of the conical portion, the at least one de-nesting formation being configured to inhibit vacuum formation between stacked holders;
removing a holder from a stack of holders, the at least one de-nesting formation inhibiting vacuum formation between the holder and the stack;
placing the holder about a cone;
removing the cone with the holder;
serving ice cream on the cone; and
handing the cone in the holder to a customer.
13. The method of claim 12 wherein providing at least one holder further comprises providing a disc portion about the open end of the conical portion and providing a rim formed about an outer periphery of the disc portion, the method further comprising keeping the holder on the cone while eating the ice cream, the disc portion and rim portion cooperating to contain ice cream melt.
14. The method of claim 13 wherein providing at least one holder further comprises providing at least one drainage formation at the open end and the method comprises allowing melt to enter the conical portion through the at least one drainage formation.
15. The method of claim 14 wherein providing at least one holder further comprises providing a lip about an inner periphery of the disc portion at the open end of the conical portion, forming the at least one drainage formation and the at least one de-nesting formation at least partly in the lip, and varying a distribution pattern of at least one of the at least one de-nesting formation and the at least one drainage formation from holder to holder.
16. The method of claim 12 wherein providing at least one holder includes providing the conical portion with a length of from about 2 to about 3 times a diameter of the open end.
17. The method of claim 12 wherein providing at least one holder includes providing the conical portion with a length of from about 1 to about 1.5 times a diameter of the open end.
18. The method of claim 12 wherein providing at least one holder includes providing the closed end with substantially hemispherical form and with a diameter of from about 0.25 to about 0.5 times a diameter of the open end.
19. The method of claim 12 wherein providing at least one holder includes providing the closed end with substantially flat, circular form and with a diameter of from about 0.75 to about 0.9 times a diameter of the open end.