Currently there is no data available, on the maximum loads for boneanchored humeral prosthesis.

In a 2020 publication (Plos One) by Luke Osborn et al, it was cited that “maximum humeral OI implant rotational torque occurring at approximately 12 Nm in an unconstrained environment aligns with in-lab results suggesting that maximum humeral OI implant torque ranges from 0.6 Nm up to 15.6 Nm depending on the activity.’ In comparence: …”Intact limbs can experience transhumeral torque as high as 57.2 Nm with average values ranging from 0.5 to 24.9 Nm during some advanced ADLs [30]. …”

By all means: your prosthetist / surgeon must give advice on the maximum loads for your specific situation.

For any upper limb prosthesis,  disadvantages may apply. Here is a list:

• insufficient ADL functionality
• irritation and skin issues (socket prosthesis)
• issues of the aperture (boneanchored prosthesis)
• poor balance (difference in weight left-right)
• shoulder pain, neck pain
• intact limb pain
• loosening-slip of the prosthesis fixation (socket prosthesis)
• unintended bump impact (boneanchored prosthesis)

When used as intended and treated with care and maintenance, an Ellis® humeral arm prosthesis may last 3 – 5 years depending on the user activity. Normal wear and tear of consumabeles (i.e. sleeves, hook rubber) is excluded from warranty, as are scratches on exterior custom coatings that may arise due to the normal use.

On average, the lifespan of an upper limb prosthesis is longer than the lifespan of a lower limb prosthesis; due to lower load forces.

Depending on your situation,  the lead time of an Ellis® arm prosthesis may vary from 4 weeks (quick fixation to present boneanchored implant or socket) to about 2 months after the humeral implant has been implanted. A detailed training protocol is applicable, under guidance of a prosthetist / surgeon.

The Ellis® elbow system is adapted to the end users’ dimensions whereby the prosthetic elbow / hand is designed to match  the positions of the contra-lateral elbow and – hand. The basic dimensions of length / circumference of the prosthetic forearm are also based on the contra-lateral arm.

The dimensions and colour of sleeves cover a limited range of standard / sleeves that are chosen to fit the contra-lateral hand dimensions as good as possible.

Yes, The mechanical elbow is designed to be waterproof, provided that no alterations are made by the prosthetist or end user.

No, in view of bone-anchored fixations, this is excluded from the intended use. A risk is identified in view of possible bone damage or loochening.

Nevertheless, technically it is possible to combine the Ellis MC34 connector with connector-base to other brand elbows, by use of standard fixations; this option technically also covers combined use with an impact-elbow …

It is strongly recommended to NOT use impact-elbows in combination with bone-anchored implants.

Yes, the Ellis MC34 Connector can be used in combination with any brand mechanical elbow, but then you will always need a customized connector-base that is prepared for fixation to that specific type of elbow.

Multiple connector-bases are available, for combined use with elbows:

• 1354 – Ellis CBESP * Connector-base Espire
• 1389 – Ellis CB12K * Connector-base 12K
• 1390 –  Ellis CBUNF * Connector-base UNF (threaded)
• 1558 – Ellis CB MOTUT * Connector-base for Motion-Utah elbows

Inquire with your prosthetist for more information on the procedure.

Yes, the Ellis MC34 Connector can be used in combination with any brand myo-elbow, but you will always need a customized connector-base that is prepared for fixation to that specific type of myo-elbow.

Multiple connector-bases are available, for combined use with myo-elbows:

• 1354E – Ellis CBESP-E * Connector-base Espire-ELOC
• 1389E – Ellis CB12K-E * Connector-base 12K-ELOC
• 1390E –  Ellis CBUNF-E * Connector-base UNF-ELOC
• 1558E – Ellis CB MOTUT-E * Connector-base for Motion-Utah-ELOC

Inquire with your prosthetist for more information on the procedure.

Yes, even with just 1 signal it is possible for a humeral amputeert to control a myo-device. Some devices support the 1-signal control option especially for humeral amputees. Examples:

• Adams Hand

Yes, if you like to benefit from the easy donning-doffing you can ask your prosthetist to adjust your socket for use with Ellis MC34 Connector.

It is possible to keep using your current elbow, by fixating it to a dedicated connector-base. Or you could choose for the Ellis A2-3-4 elbow and benefit from multiple exchange options for the end terminals also …

In case you have a myo-elbow, then a special option is offered: make use of the Humerus socket adapter with detachable contact. You can then easily switch from mechanical prosthesis to myo, without having to also exchange the socket….

Yes, if you like to benefit from the easy donning-doffing of the end terminals; you can ask your prosthetist to adjust your radial socket for use with the MPTA.

It is possible to keep using your current myo-hand, by fixating it to a dedicated lamination ring onto the MPTA… Multiple options apply.

Yes, it is technically possible to adapt the fixation of the Ellis® 1C passive arm prosthesis to a socket prosthesis. In order to obtain the most suitable dimensions and adaptation,  your prosthetist needs to contact us – we will strive to provide the best possible result for your situation.

You should contact your prosthetist to verify if osseointegration is a suitable option for your situation. For more details on the osseointegration for a humeral bone, we refer to the website of OTN Implants.

Research has shown that users with boneanchored prosthesis experience improved haptic feedback due to the direct fixation of the arm prosthesis. Even without myo control, a boneanchored arm prosthesis can feel significantly more like a natural ‘part of the body’ than a socket prosthesis.

Some specific disadvantages of socket prosthesis may be solved with a boneanchored prosthesis; this mainly pertains to reduced skin irritation; an improved mechanical fixation (zero rotation) and a significant difference in donning /doffing by a click connector.

Yes, it is technically possible to adapt the Ellis® MC34 connector to any arm prosthesis. In order to obtain a suitable adaptation,  your prosthetist needs to contact us – together we will strive to provide the best possible adaptation for fixation of your myo elbow onto the Ellis® MC34 Connector.

This adaptation is limited to a mechanical fixation, integration of the myo contacts is to be arranged by your prostesist. Keep in mind that the results may differ from your previous experience, since the shape of your residual stump may have changed.