The Journal of Hand Surgery - European Volume - April 2018 - 16

S16
Conclusions: Scaphoid fracture should be suspected
in patients who sustain a wrist injury irrespective of
their age to avoid missing a scaphoid fracture. We
were unable to identify any particular factors in
patients over 50 years old to explain the observed
increased scaphoid fracture frequency in our cohort
in comparison with the low frequency reported in historical studies.

The NeuFlex Metacarpophalangeal Joint Implant:
Does it Fracture and if so Where? An Analysis of 30
Retrieved Implants
Professor Grey E B Giddins and Professor Tom Joyce
RUH
Time in programme: Friday 4th May 201810:09

Aims: To better understand the reasons for implant
failure we assessed explanted NeuFlex metacarpophalangeal (MP) joint prostheses to identify position
of fracture.
Methods: Following revision MP joint surgery for
symptomatic failure the implants were cleaned and
photographed. The position of fracture, if any, was
noted. Patient demographics were recorded.

Journal of Hand Surgery (Eur) 43(Supplement 1)
Results: Thirty NeuFlex MP explants were analysed.
Seven (23%) were not fractured. Eleven explants
(37%) had fractured at the hinge; nine (30%) had fractured at the junction of the distal stem and hinge; and
three (10%) had fractured at both the hinge and distal
stem. Age at revision ranged from 43 to 81 (median
58) years. Time in vivo ranged from 6 to 120 (median
58.5) months. Discolouration of some explants had
occurred; other explants appeared to show no
colour change.
Conclusions: This appears to be the first report of the
position of fracture of NeuFlex explants. It is also
the largest report of silicone arthroplasty explants.
The majority (77%) had fractured. Nine (30%)
NeuFlex explants had fractured at the junction of
the distal stem and hinge; the typical position seen
with Swanson and Sutter/Avanta MP joint explants.
Eleven (37%) fractured across the hinge; this has
not previously been reported although has been
seen in in vitro testing. Intriguingly, 3 (10%)
NeuFlex explants suffered fractures both at the
hinge and at the junction of the distal stem and
hinge which has also never been reported previously.

Table of Contents for the Digital Edition of The Journal of Hand Surgery - European Volume - April 2018