We performed a retrospective review of a consecutive
series of 178 Mobility total ankle replacements (TARs) performed
by three surgeons between January 2004 and June 2009, and analysed
radiological parameters and clinical outcomes in a subgroup of 129
patients. The mean follow-up was 4 years (2 to 6.3). A total of
ten revision procedures (5.6%) were undertaken. The mean Ankle Osteoarthritis
Scale (AOS) pain score was 17 (0 to 88) and 86% of patients were
clinically improved at follow-up. However, 18 patients (18 TARs,
14%) had a poor outcome with an AOS pain score of >
30. A worse
outcome was associated with a pre-operative diagnosis of post-traumatic degenerative
arthritis. However, no pre- or post-operative radiological parameters
were significantly associated with a poor outcome. Of the patients
with persistent pain, eight had predominantly medial-sided pain.
Thirty TARs (29%) had a radiolucency in at least one zone. The outcome of the Mobility TAR at a mean of four years is satisfactory
in >
85% of patients. However, there is a significant incidence
of persistent pain, particularly on the medial side, for which we
were unable to establish a cause. Cite this article:
In a retrospective study we compared 32 HINTEGRA
total ankle replacements (TARs) and 35 Mobility TARs performed between
July 2005 and May 2010, with a minimum follow-up of two years. The
mean follow-up for the HINTEGRA group was 53 months (24 to 76) and
for the Mobility group was 34 months (24 to 45). All procedures
were performed by a single surgeon. There was no significant difference between the two groups with
regard to the mean AOFAS score, visual analogue score for pain or
range of movement of the ankle at the latest follow-up. Most radiological
measurements did not differ significantly between the two groups.
However, the most common grade of heterotopic ossification (HO)
was grade 3 in the HINTEGRA group (10 of 13 TARs, 76.9%) and grade
2 in the Mobility group (four of seven TARs, 57.1%) (p = 0.025).
Although HO was more frequent in the HINTEGRA group (40.6%) than
in the Mobility group (20.0%), this was not statistically significant
(p = 0.065).The difference in peri-operative complications between
the two groups was not significant, but intra-operative medial malleolar
fractures occurred in four (11.4%) in the Mobility group; four (12.5%)
in the HINTEGRA group and one TAR (2.9%) in the Mobility group failed
(p = 0.185). Cite this article:
