Table 1 Qualitative assessment

Unique position?

(number of possible positions with guide in snap-fit position, i.e. full neck contact and contact on all knifes),

1, 2, 3, ...

1

1

1

1

1

Passive stability (snap-fit) obtained?

Yes/No

Yes

Yes

Yes

Yes

Yes

Full contact obtained at neck portion of jig?

Yes/No

Yes

Yes

Yes

Yes

Yes

All struts in contact with femoral head?

Yes/No

Yes

Yes

Yes

Yes

Yes

Guide failure?

(Guide breaks, or small cracks)

Yes/No

No

No

No

No

No

Complexity to put guide in place?

1 (not complex) to

5 (very complex)

1

1

1

2

1

Different steps to put guide in place

(1 = single hand movement)

1, 2, 3, ...

1

1

1

1

1