The functional prosthetic restoration of parts of the hand presents a particular technical challenge. The myoelectrically controlled partial hand prosthesis VINCENTpartial4 is specifically designed to meet these needs, as it can be individually adapted to the care situation.

 

The VINCENTpartial4 is a hand prosthesis for partial hand restorations with motorised individual fingers and thumbs. Sensors and controls have been miniaturised to allow them to be placed directly on the back of the hand, together with the mouldable battery cells. This allows an anatomical reconstruction of the hand where technically possible. The fingers and thumb are attached to the prosthetic socket using a steel frame design. This determines the width of the hand as well as the position and alignment of the fingers. The metacarpal arch can also be modelled. The prosthesis can be controlled via EMG sensors using muscle tension or via tactile force sensors. The battery system can be charged via a USB-C socket. If there is no power socket, it can also be charged via a mobile power bank.

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The grip selection and control of fingers follow the uniform control concept of the VINCENT hand prostheses. Many different grips can be achieved by timed opening and closing signals, using four long fingers and a thumb. If fewer powered fingers are used, the number of grips are reduced accordingly.

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The fingers and thumb are made of high-strength aluminium alloy, or titanium for even greater durability. All components are rubberised for a secure grip, and the tip of the index finger is touchscreen compatible. The joints of all fingers and the thumb are fully covered in every possible position. This prevents objects from being clamped as the fingers and the thumb open.

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Eight different colors give the silicone parts of the VINCENTpartial4 an individual and unique design. The colors black, white, pearl white and transparent as well as four different natural colors are available, each in combination with five different metal colors and titanium.

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Waterproofness of the prosthesis

The motorised fingers of the VINCENTpartial4 are waterproof according to IP68. Washing hands under running water is possible, provided that the design of the prosthesis socket also permits this. The control unit, sensors and batteries must still be protected from water.

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Single finger control

The single finger control enables the five fingers to be individually controlled by up to five input signals. This allows a faster and more intuitive use of the prosthesis.