Surgical Technique

Do we ream in “odds” or “evens” for Austral, and why?

Odds.

Austral is a press fit design. By under-reaming by 1mm, this creates press fit between the acetabulum and the cup. It aims to achieve strong primary stability and bony on-growth.

Eg. Reaming to size 53 = size 54 cup.

Do we ream in “odds” or “evens” for Saturne/Saturne 2, and why?

Evens

We want line to line reaming for Saturne/Saturne 2. This is because this dual mobility cup is designed to achieve stable fixation without excessive press fit.

In a total knee replacement, which component is cut first?

The femoral component - the distal femur cut is completed first.

In a total knee replacement, which surgical step would come after the tibial resection?

Extension and flexion gap measurement.

In a total knee replacement, which two things could be put on power first?

1. Saw Blade

2. Intramedullary Drill Bit

There are two calcar reamer sizes for the EVOK stems. When would we use the smaller one?

For stem sizes 7-12/13

There are two calcar reamer sizes for the EVOK stems. When would we use the larger one?

For stem sizes 12/13-18

Describe how an EVOK stem should be seated in the canal?

It should be gently impacted by the stem impactor until the HA border marking is not visible and the stem is stable.

What are some potential consequences is the stem is impacted too firmly or too low?

These factors may cause a fracture.

What can be used if a stem needs to be removed from the canal?

A stem extractor. This is usually a “have available/HA” item/tray.