Roger Wolfson and Associates

Prosthetic components

Introduction to Prosthetic Components

What follows is a brief, yet informative description of the different types of prosthetic components, including:

Foot components

  • Proprio Foot®
  • Ceterus
  • Flex-Foot®
  • Assure
  • Flex-Foot® Axia
  • Trias
  • Tribute
  • Vari-Flex
  • Flex Symes
  • K2 Sensation
  • Elation
  • Greissinger®
  • Single-Axis Foot
  • SACH Foot

Socket technology

  • Icecast® Anatomy
  • Pressure Pads
  • Iceflex® Endurance
  • Iceflex® Balance and Locks

Proprio Foot®

the Proprio Foot®, the world’s first intelligent foot module, provides unprecedented physiological benefits for trans tibial (below knee) amputees.   A wide, automated range of ankle flexion with proven Flex-Foot® dynamics means that the functionality it provides is currently the closest one can get to the human foot.


  • The Proprio Foot® thinks for itself, responds brilliantly to changing terrain and transforms the approach to stairs and slopes as well as level-ground walking.
  • The Proprio Foot® appropriately angles itself to assist when sitting and standing up is easier and more natural.
  • The Proprio Foot® is fitted with a calibrated alignment control feature.

Overall, the Proprio Foot® creates the feeling of improved proprioception with a more balanced, symmetrical, confident gait reducing strain on the back, hips and knees.


Ceterus® sets the joy of life in motion with a prosthesis that provides all the right moves.


  • The Flex-Foot® patented J-shape and CarbonX® Active Heel work together, resulting in less energy being expended which allows one to walk further for longer periods of time.
  • The Ceterus®system controls the rate of forward propulsion and delivers a smooth, natural gait.
  • Energy is stored from heel strike to foot flat then returned to promote active tibial progression for effortless movement.
  • Responsive rotation for a smoother range of motion.
  • When the user pivots, the torsion control cell is gradually twisted and compressed.
  • A low profile version of Ceterus is also available.
  • Users acknowledge that Ceterus® creates a progressive resistance that provides natural flexibility and does not stop abruptly.
  • Fully-adjustable shock absorption for optimised functionality.
  • A built-in vertical shock pylon that absorbs impact during the entire stance phase ensures that stress is diminished on all parts of the body.
  • Adjustments to the shock pylon can be fully controlled by the user to accommodate any type of activity.
  • Ceterus® allows users the freedom to engage in varied activities without ever having to change feet or sacrifice comfort and performance.

Flex-Foot® Assure

The new Flex-Foot® Assure by Ossur is the perfect solution for diabetics and those suffering from vascular disorders.  Flex-Foot® Assure incorporates basic Flex-Foot® technology that allows for a soft, smooth roll-over that ensures a stable gait with the benefits of dynamic response.


  • Full-length toe lever and standard foot cover with an attachment plate.
  • Active heel with a cushion wedge.
  • Low build height.

The closed-cell foam heel wedge aids the transition from heel to toe and provides a cushioning effect at heel strike.

Flex-Foot® Axia

Flex-Foot® Axia prosthetic foot to feature a design that actually guides the foot through each step, contributing to stability, balance and easy roll-over.


  • Offers a multi-axial range of motion with moderate energy response and low build height.
  • Ideally positions itself for users with medium to long residual limbs who require a comfortable and consistent gait.
  • Suitable for those who engage in low to moderate levels of activity.
  • Advanced technology and functional refinements built into the foot offer the ability to navigate rough terrain with safety and confidence.

Flex-Foot® is synonymous with high-performance carbon fibre feet and issuitable for all ages and activity levels.


Dual sprints in the heel and forefoot provide shock absorption at heel strike and a smoother, more natural roll-over for excellent, all round walking performance.


  • Lightweight carbon construction
  • Shock absorption at heel strike
  • Smooth roll-over
  • Good energy return
  • Secure, controlled movements
  • Adapts to various speeds and surfaces
  • Stress reduction for the sound extremity
  • Suitable for Otto Bock mobility grades 2 and 3
  • When stress is placed on the heel, the Trias cushions the impact which results in increased comfort and simultaneously supports plantar flexion of the foot
  • The combination of foot shell and connection cap provides a natural finish to the cosmetic cover of the prosthesis
  • The overall structure of the IC30 Trias is similar to the human foot



The College Park Tribute® offers a simple and valuable solution for those suffering from dysvascular disorders.   The combination of College Park design principles, multi-axial transverse rotation and a full-length toe lever each contribute towards achieving a high degree of mobility.


  • The College Park Tribute® is a simple foot or ankle unit; hence, no maintenance is required.
  • Multi-axial function provides superior stability over uneven terrain.
  • Controlled, dynamic response designed for low to moderate activity.
  • Full-length toe unit provides increased comfort.
  • Customised gait Adjustable Stride Control®.
  • 12 month warranty.


Vari Flex

Vari Flex is designed to provide a slender prosthesis with an attractive cosmetic finish, at the same time enabling excellent energy return.


  • Lightweight and easy to assemble
  • Slender profile
  • Available with a standard 30mm graphite pylon as well as a male pyramid
  • Provides easy attachment to endo-skeletal pylon components
  • Ideal for new as well as existing lower limb amputees
  • Of special benefit to the trans femoral (above knee) amputee due to ease of coupling of the foot and pylon with endo-skeletal knee systems.
  • The proprietary J-Shape enables effortless tibial progression while the active heel acts as an efficient shock-absorber
  • A low profile version that caters for a shorter stature is also available

Flex Symes

The Flex Symes foot design is based on the well-known Flex-Foot® concept which is a carbon foot module connected to an actively deflecting carbon heel.

Flex Symes is a prosthetic foot specifically designed to cater for those who have undergone a symes (ankle disarticulation) or pyrogoff amputation.

The improved alignment adapter offers angulations and adjustments in ML/AP planes.


  • Circular alignment wedges ease alignment and fittin
  • Active energy-storing heel keeps residual limb and joints in better condition

K2 Sensation

The K2 Sensation provides quality of life and is a completely hassle-free option.


  • The K2 Sensation provides a multi-axial range of motion
  • Cushions each step and helps maintain control over barriers such as ramps and curbs
  • Full-length toe lever, flexible keel and integrated multi-axial design enable a smooth transition from heel strike to toe.
  • Provides added relief and comfort to those suffering from dysvascular disorders
  • The K2 Sensation has a low profile finished height of 25/8”
  • Includes an integrated titanium pyramid and anatomical foot cover with a sandal toe for easy socket attachment and attractive cosmetic finish.


The Elation combines heel height adjustability and energy return.


  • The heel height can be adjusted anywhere between 0 and 5cma (2”) by pushing a button
  • The carefully designed contour enables flexibility and is energy efficient which ensures a smooth roll-over
  • The foot adjusts to the load applied
  • A narrow, anatomically correct foot cover with sandal toe is bonded to the foot, which is suitable for dress shoes, sandals and other types of footwear.

Greissinger® Plus

The Greissinger® Plus includes a joint that adjusts to uneven walking surfaces that could be hazardous to less flexible feet.  The Greissinger® Plus enables one to move more freely and securely across indoor and outdoor walking surfaces.


  • Secure standing and walking
  • Good roll-over properties
  • Multi-axial function conforms to uneven surfaces
  • Elastomers that come in three degrees of stiffness enables individual adjustment
  • Natural gait pattern
  • Suitable for mobility grades 2 and 3

Single-Axis Foot

The Single-Axis Foot is well-suited for low activity people with trans femoral (above knee) amputations.  The Single-Axis Foot is designed to enable one to reach foot-flat rapidly and securely; and since it is constructed without toes and in two sections, the sole can be replaced.  It also comes in different heel heights, foot shapes and size ranges.


  • Especially suitable for trans femoral (above knee) fittings
  • High level of security
  • Natural appearance
  • The Single-Axis Foot carries a maximum weight of 100 kgs/220 pounds


The simplest type of non-articulated foot is the SACH (Soft Ankle Cushioned Heel) foot.


  • Rigid keel
  • Ankle action is provided by the soft rubber heel which compresses under load during the eartly part of the stance phase of walking.

The rubber heel wedges are available in three densities:

  • Soft
  • Medium
  • Hard


Socket Technology

Notwithstanding the use of good quality components (socket, lock and sleeves) or a high performing suspension system, the prosthetic fit is of paramount importance.  A comfortable prosthetic socket will ensure a successful rehabilitation outcome.  At Roger Wolfson and Associates we pride ourselves in having achieved a combined 50 years’ worth of experience in prosthetic socket fittings.

Sockets are custom-made by Roger Wolfson and Associates and tailored to suit individual needs.

Icecast Anatomy

Icelandic Direct Casting (IDC) sockets are fabricated with the Icecast® Anatomy pressure bladder and the Icelock® 600 series of locking and attachment components.  The Icelock series allows for interchangeable suspension (pin, lanyard, valve), which obviates the need for the construction of a new socket.


  • IDC provides a total surface bearing socket through even pressure distribution during casting and fitting.
  • IDC guarantees a replicable socket fitting.
  • IDC communicates with users direct in addressing specific problem areas.

Using the Icecast® Anatomy pressure casting, the prosthetist undertakes a unique socket making process.   Integrated ContourCell® shaping chambers can be inflated to achieve an anatomically correct socket shape.  The increased control over the socket shape enhances user comfort and stability.

Pressure Pads

Pressure Pads are specifically designed to relieve pressure on bony prominences and other sensitive areas of the residual limb.  Pressure Pads are made using a unique blend of silicone and provide user comfort in that they enable pressure redistribution and equalization.

Iceflex® Endurance

The Iceflex® Endurance suction suspension sleeve is designed to fit over any definitive prosthetic socket.

When used with a distal locking device, it provides additional user security. In some cases, the Iceflex® Endurance can serve as a locking device in itself when used over a liner and definitive socket with a suction valve, ensuring that no air enters the definitive socket from above.


  • Enhanced security and stability.
  • Pre-flexed to facilitate knee flexion.
  • Strength and durability for high active users.

Iceflex® Balance

The new, economical Iceflex® Balance sleeve features soft silicone and a nylon/Lycra® cover.  The nylon ensures strength and lycra provides elasticity, while silicone offers optimal adhesion. This winning combination guarantees comfort and durability.


  • Easy to wear.
  • Iceflex® Balance contains a soft silicone inner layer which is gentle on the skin.
  • Iceflex® Balance is suitable for low to moderate impact levels.