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Modular Necks
 
To satisfy the large range of femoral shapes
and sizes encountered during the course of orthopedic surgery,
it would be necessary to have a exceedingly large range of
prosthetic sizes. Therefore, about 1980, the concept of interchangeability
of heads was developed from the original monoblock implants.
In fact, prosthetic modulariy means the ability to use interchangeable
components to restore optimum anatomical conditions (e.g.
length, anteversion, offset etc). The first form of modularity
was later further developed by an even more innovative policy
which attributes specific "roles" to each component
of the implant whether cemented or press-fitted. This enables
the elements to adapt to the anatomy in an optimal manner.
It is clear that, in this context, the modular neck becomes
the "pivot" necessary for the entire prosthetic
implant, the connection that allows the stem and cup to adapt
in the best possible manner.
The Modular
Neck
The modular neck is the adapter between the
stem and cup necessary to restore the anatomical-physiological
conditions such as off-set, muscular tension, center of rotation,
position of the articular head and, last but not least, the
correct distribution of loads on the implant.
Modular necks are available in two lengths
and six angles. Along with five different head sizes, this
totalt in a record of 110 different angles for perfect fit!
A |
Straight |
Short
and Long |
B |
Anteverted
/ Retroverted 8ø |
Short
and Long |
C |
Anteverted
/ Retroverted 15ø |
Short
and Long |
D |
Varus
/ Valgus (+/-8ø) |
Short
and Long |
E |
Anteverted-retroverted
/ Varus-valgus 1 |
Short
and Long |
F |
Anteverted-retroverted
/ Varus-valgus 2 |
Short
and Long |
For more information on the Ancafit prosthesis
such as brochures, articles, video etc., please contact
Ortotech directly.
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