MOST OptionsTM - Limb Salvage Surgery

Treatment of soft tissue cancers of the lower limb has developed significantly over the past 30 years.  Limb salvage procedures are more frequently being used to treat tumors of the lower limb.  In the past, the original treatment options were limited and amputation was typically the option of choice to manage these tumors.  The possibility of tumor recurrence and the possibility of metastasis limited many developments in treatment. 

Advancements in chemotherapy and imaging technologies provided a door for limb salvage treatment.  Chemotherapy has helped by reducing the risks associated with recurrence and metastasis.  Computed Tomography (CT) imaging and Magnetic Resonance Imaging (MRI) have aided doctors by providing more detailed and precise images of tumors.

The first prostheses designed for limb salvage around the knee were constrained hinge knee systems.  These first systems functioned like a door hinge and only provided extension and flexion.  The constrained hinge knees had limited success and would frequently loosen.  Additionally, the constrained designs could not manage rotational stress and transferred these stresses to the bone/implant interface.  These stresses to the bone/implant interface were one of the key factors in early loosening for the first generation hinged knees.

The Advantages of a Rotating Hinge

The rotating hinge knee prostheses were developed to reduce the stresses on the bone/implant interface.  The rotating hinge knees have a similar door hinge motion but also add another axis of rotation parallel to the leg.   This additional axis of rotation reduces the stress applied to the implant/bone interface. 

The MOST Options System is a rotating hinge knee with over eight years of experience incorporated into the latest design.  The MOST Options rotating hinge includes additional features to help reduce the stresses transferred to the bone/implant interface.  The “Soft Stop” ramp incorporated into the hinge is designed to provide the required rotational stability, which limits risk of placing undue stress on the bone/implant interface.  The ramp design helps to transfer these stresses to the soft tissue.

An Emphasis on Bone Preservation

The MOST Options System also offers a variety of options for attaching the implant to the bone.  These options are designed to ensure that the implant is able to fit the patient’s anatomy and is well-secured.  Another important feature incorporated into the MOST Options System is the resection options.  The system provides bone-conserving options so bone stock can be preserved.

A Solution for Each Patient

The MOST Options System is designed to enable patients facing severe bone loss of the knee or hip to regain use of their limbs and provides the potential for restoration of function.  

The system goes beyond the requirements of a rotating hinge and provides the surgeon intraoperative flexibility to address a patient’s individual situation.

Patient Resources*

*for informational purposes only