Lower Limbs

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Lower Limbs


The shape of the collar of the socket is important for comfort and control of the prosthesis.

There are three common types,

The quadrangular shape

The Ischium rests on a horizontal shelf and  pressure is applied in opposition to the front of the socket preventing the escape of its support.

An outer wall goes back to the trochanter. The perineum is freed.

This form is no longer used today, it has as its disadvantages:

  • To be to restrictive onthe muscle through the compression it applies,
  • Reduces the mobility of the stump,
  • Being uncomfortable on the level of its ischial support
  • Does not provide good lateral control of the prosthesis.

The socket with Integrated ischium

More complex in its principle of action and also in its development, we believe that with very few exceptions it is unthinkable not to offer this type of socket to trans-femoral amputees.

The horizontal cross-section of the socket is much more respectful of the anatomy and much less aggressive.

The muscles and tendons suffer under less compression strain retaining more freedom for better mobility.

The ischium does not rest directly on a shelf, it is housed in an anatomical shape, and is propped up by being skewed, which allows the stump to rest on the outer femur. Thus, each movement of the femur has a direct, immediate and accurate effect on the whole of the prosthesis.

The balance of horizontal and vertical forces applied by the socket on the stump is three dimensional. Like this, the stump controls the prosthetic on all levels.

This method requires a lot of precision and requires skills and experience, it enables people to live more comfortably and actively throughout their work and their leisure, or for some during their sport.

For older or less active patients, we apply this method by adapting to the specificities of the stump, for a gain in comfort and energy.

The MAS ® socket

This socket has been developed by Marlo Ortiz who has given his name to it (the Marlo Anatomical Socket) and this concept also respects bone setting and three dimensional control.

It is distinguished more by its action on the ischiopubic bone than on the ischium, and it allows for a more generous cut for comfort while sitting and in an extreme range of  movement.

This type of socket is also compatible with our moulded silicone liners.

Lower Limbs - Thigh Femoral Prostheses - The socket collar -