Following the resection of an extensive amount of bone in the
treatment of a tumour, the residual segment may be insufficient
to accept a standard length intramedullary cemented stem. Short-stemmed
endoprostheses conceivably have an increased risk of aseptic loosening.
Extra-cortical plates have been added to minimise this risk by supplementing
fixation. The aim of this study was to investigate the survivorship
of short-stemmed endoprostheses and extra-cortical plates. The study involved 37 patients who underwent limb salvage surgery
for a primary neoplasm of bone between 1998 and 2013. Endoprosthetic
replacement involved the proximal humerus in nine, the proximal
femur in nine, the distal femur in 13 and the proximal tibia in
six patients. There were 12 primary (32%) and 25 revision procedures (68%).
Implant survivorship was compared with matched controls. The amount
of bone that was resected was >
70% of its length and statistically
greater than the standard control group at each anatomical site.Aims
Patients and Methods
We present a retrospective review of patients treated with extracorporeally
irradiated allografts for primary and secondary bone tumours with
the mid- and long-term survivorship and the functional and radiographic
outcomes. A total of 113 of 116 (97.4%) patients who were treated with
extracorporeally irradiated allografts between 1996 and 2014 were
followed up. Forms of treatment included reconstructions, prostheses
and composite reconstructions, both with and without vascularised
grafts. Survivorship was determined by the Kaplan-Meier method.
Clinical outcomes were assessed using the Musculoskeletal Tumor
Society (MSTS) scoring system, the Toronto Extremity Salvage Score
(TESS) and Quality of Life-C30 (QLQ-30) measures. Radiographic outcomes
were assessed using the International Society of Limb Salvage (ISOLS)
radiographic scoring system.Aims
Patients and Methods
Hydroxyapatite coatings for uncemented fixation in total knee
arthroplasty can theoretically provide a long-lasting biological
interface with the host bone. The objective of this study was to
test this hypothesis with propriety hydroxyapatite, peri-apatite,
coated tibial components using component migration measured with radiostereometric
analysis over two years as an indicator of long-term fixation. A total of 29 patients at two centres received uncemented PA-coated
tibial components and were followed for two years with radiostereometric
analysis exams to quantify the migration of the component.Aims
Patients and Methods
Periprosthetic femoral fracture (PFF) is a potentially
devastating complication after total hip arthroplasty, with historically
high rates of complication and failure because of the technical
challenges of surgery, as well as the prevalence of advanced age
and comorbidity in the patients at risk. This study describes the short-term outcome after revision arthroplasty
using a modular, titanium, tapered, conical stem for PFF in a series
of 38 fractures in 37 patients. The mean age of the cohort was 77 years (47 to 96). A total of
27 patients had an American Society of Anesthesiologists grade of
at least 3. At a mean follow-up of 35 months (4 to 66) the mean
Oxford Hip Score (OHS) was 35 (15 to 48) and comorbidity was significantly
associated with a poorer OHS. All fractures united and no stem needed
to be revised. Three hips in three patients required further surgery
for infection, recurrent PFF and recurrent dislocation and three
other patients required closed manipulation for a single dislocation.
One stem subsided more than 5 mm but then stabilised and required
no further intervention. In this series, a modular, tapered, conical stem provided a versatile
reconstruction solution with a low rate of complications. Cite this article:
All-suture anchors are increasingly used in rotator cuff repair procedures. Potential benefits include decreased bone damage. However, there is limited published evidence for the relative strength of fixation for all-suture anchors compared with traditional anchors. A total of four commercially available all-suture anchors, the ‘Y-Knot’ (ConMed), Q-FIX (Smith & Nephew), ICONIX (Stryker) and JuggerKnot (Zimmer Biomet) and a traditional anchor control TWINFIX Ultra PK Suture Anchor (Smith & Nephew) were tested in cadaveric human humeral head rotator cuff repair models (n = 24). This construct underwent cyclic loading applied by a mechanical testing rig (Zwick/Roell). Ultimate load to failure, gap formation at 50, 100, 150 and 200 cycles, and failure mechanism were recorded. Significance was set at p < 0.05.Objectives
Materials and Methods
To assess the accuracy of patient-specific instruments (PSIs) CT scans were obtained from five female cadaveric pelvises. Five osteotomies were designed using Mimics software: sacroiliac, biplanar supra-acetabular, two parallel iliopubic and ischial. For cases of the left hemipelvis, PSIs were designed to guide standard oscillating saw osteotomies and later manufactured using 3D printing. Osteotomies were performed using the standard manual technique in cases of the right hemipelvis. Post-resection CT scans were quantitatively analysed. Student’s Objectives
Methods
We are currently facing an epidemic of periprosthetic
fractures around the hip. They may occur either during surgery or
post-operatively. Although the acetabulum may be involved, the femur
is most commonly affected. We are being presented with new, difficult
fracture patterns around cemented and cementless implants, and we
face the challenge of an elderly population who may have grossly
deficient bone and may struggle to rehabilitate after such injuries.
The correct surgical management of these fractures is challenging.
This article will review the current choices of implants and techniques
available to deal with periprosthetic fractures of the femur. Cite this article:
We report the clinical and radiographic outcomes
of 208 consecutive femoral revision arthroplasties performed in 202
patients (119 women, 83 men) between March 1991 and December 2007
using the X-change Femoral Revision System, fresh-frozen morcellised
allograft and a cemented polished Exeter stem. All patients were
followed prospectively. The mean age of the patients at revision
was 65 years (30 to 86). At final review in December 2013 a total
of 130 patients with 135 reconstructions (64.9%) were alive and
had a non re-revised femoral component after a mean follow-up of
10.6 years (4.7 to 20.9). One patient was lost to follow-up at six
years, and their data were included up to this point.
Re-operation for any reason was performed in 33 hips (15.9%), in
13 of which the femoral component was re-revised (6.3%). The mean
pre-operative Harris hip score was 52 (19 to 95) (n = 73) and improved
to 80 (22 to 100) (n = 161) by the last follow-up. Kaplan–Meier
survival with femoral re-revision for any reason as the endpoint
was 94.9% (95% confidence intervals (CI) 90.2 to 97.4) at ten years;
with femoral re-revision for aseptic loosening as the endpoint it was
99.4% (95% CI 95.7 to 99.9); with femoral re-operation for any reason
as the endpoint it was 84.5% (95% CI 78.3 to 89.1); and with subsidence ≥ 5
mm it was 87.3% (95% CI 80.5 to 91.8). Femoral revision with the
use of impaction allograft bone grafting and a cemented polished
stem results in a satisfying survival rate at a mean of ten years’ follow-up. Cite this article:
The aim of this study was to compare the outcome of revision
total knee arthroplasty (TKA) with and without proximalisation of
the tibial tubercle in patients with a failed primary TKA who have
pseudo patella baja. All revision TKAs, performed between January 2008 and November
2013 at a tertiary referral University Orthopaedic Department were
retrospectively reviewed. Pseudo patella baja was defined using
the modified Insall-Salvati and the Blackburne-Peel ratios. A proximalisation
of the tibial tubercle was performed in 13 patients with pseudo
patella baja who were matched with a control group of 13 patients
for gender, age, height, weight, body mass index, length of surgery
and Blackburne-Peel ratio. Outcome was assessed two years post-operatively
using the Knee Society Score (KSS).Aims
Patients and Methods
Restoring the pre-morbid anatomy of the proximal humerus is a
goal of anatomical shoulder arthroplasty, but reliance is placed
on the surgeon’s experience and on anatomical estimations. The purpose
of this study was to present a novel method, ‘Statistical Shape
Modelling’, which accurately predicts the pre-morbid proximal humeral anatomy
and calculates the 3D geometric parameters needed to restore normal
anatomy in patients with severe degenerative osteoarthritis or a
fracture of the proximal humerus. From a database of 57 humeral CT scans 3D humeral reconstructions
were manually created. The reconstructions were used to construct
a statistical shape model (SSM), which was then tested on a second
set of 52 scans. For each humerus in the second set, 3D reconstructions
of four diaphyseal segments of varying lengths were created. These
reconstructions were chosen to mimic severe osteoarthritis, a fracture
of the surgical neck of the humerus and a proximal humeral fracture
with diaphyseal extension. The SSM was then applied to the diaphyseal
segments to see how well it predicted proximal morphology, using
the actual proximal humeral morphology for comparison.Aims
Materials and Methods
Fractures of the distal femur can be challenging to manage and
are on the increase in the elderly osteoporotic population. Management
with casting or bracing can unacceptably limit a patient’s ability
to bear weight, but historically, operative fixation has been associated
with a high rate of re-operation. In this study, we describe the outcomes
of fixation using modern implants within a strategy of early return
to function. All patients treated at our centre with lateral distal femoral
locking plates (LDFLP) between 2009 and 2014 were identified. Fracture
classification and operative information including weight-bearing
status, rates of union, re-operation, failure of implants and mortality
rate, were recorded.Aims
Patients and Methods
We aimed to investigate factors related to the technique of medial
opening wedge high tibial osteotomy which might predispose to the
development of a lateral hinge fracture. A total of 71 patients with 82 osteotomies were included in the
study. Their mean age was 62.9 years (37 to 80). The classification
of the type of osteotomy was based on whether it extended beyond
the fibular head. The level of the osteotomy was classified according
to the height of its endpoint.Aims
Patients and Methods
The Unified Classification System (UCS) emphasises
the key principles in the assessment and management of peri-prosthetic
fractures complicating partial or total joint replacement. We tested the inter- and intra-observer agreement for the UCS
as applied to the pelvis and femur using 20 examples of peri-prosthetic
fracture in 17 patients. Each subtype of the UCS was represented
by at least one case. Specialist orthopaedic surgeons (experts)
and orthopaedic residents (pre-experts) assessed reliability on
two separate occasions. For the pelvis, the UCS showed inter-observer agreement of 0.837
(95% confidence intervals (CI) 0.798 to 0.876) for the experts and
0.728 (95% CI 0.689 to 0.767) for the pre-experts. The intra-observer
agreement for the experts was 0.861 (95% CI 0.760 to 0.963) and
0.803 (95% 0.688 to 0.918) for the pre-experts. For the femur, the
UCS showed an inter-observer kappa value of 0.805 (95% CI 0.765
to 0.845) for the experts and a value of 0.732 (95% CI 0.690 to 0.773)
for the pre-experts. The intra-observer agreement was 0.920 (95%
CI 0.867 to 0.973) for the experts, and 0.772 (95% CI 0.652 to 0.892)
for the pre-experts. This corresponds to a substantial and ‘almost
perfect’ inter- and intra-observer agreement for the UCS for peri-prosthetic
fractures of the pelvis and femur. We hope that unifying the terminology of these injuries will
assist in their assessment, treatment and outcome. Cite this article:
Reconstruction of the acetabulum after failed total hip arthroplasty
(THA) can be a surgical challenge in the presence of severe bone
loss. We report the long-term survival of a porous tantalum revision
acetabular component, its radiological appearance and quality of
life outcomes. We reviewed the results of 46 patients who had undergone revision
of a failed acetabular component with a Paprosky II or III bone
defect and reconstruction with a hemispherical, tantalum acetabular
component, supplementary screws and a cemented polyethylene liner.Aims
Patients and Methods
We assessed the long-term (more than ten-year) outcomes of the
Kudo type-5 elbow prosthesis in patients with rheumatoid arthritis
(RA). We reviewed 41 elbows (Larsen Grade IV, n = 21; Grade V, n =
20) in 31 patients with RA who had undergone a Kudo type-5 total
elbow arthroplasty (TEA) between 1994 and 2003, and had been followed
up for more than ten years. The humeral component was cementless
and the all-polyethylene ulnar component cemented in every patient. Clinical
outcome was assessed using the Mayo elbow performance score. We
calculated the revision rate and evaluated potential risk factors
for revision. The duration of follow-up was a mean 141 months (120
to 203).Aims
Materials and Methods
We describe the use of a protocol of irrigation and debridement
(I&
D) with retention of the implant for the treatment of periprosthetic
infection of a total elbow arthroplasty (TEA). This may be an attractive
alternative to staged re-implantation. Between 1990 and 2010, 23 consecutive patients were treated in
this way. Three were lost to follow-up leaving 20 patients (21 TEAs)
in the study. There were six men and 14 women. Their mean age was
58 years (23 to 76). The protocol involved: component unlinking,
irrigation and debridement (I&
D), and the introduction of antibiotic
laden cement beads; organism-specific intravenous antibiotics; repeat
I&
D and re-linkage of the implant if appropriate; long-term
oral antibiotic therapy. Aims
Patients and Methods
Acetabular bone loss is a challenging problem
facing the revision total hip replacement surgeon. Reconstruction
of the acetabulum depends on the presence of anterosuperior and
posteroinferior pelvic column support for component fixation and
stability. The Paprosky classification is most commonly used when
determining the location and degree of acetabular bone loss. Augments
serve the function of either providing primary construct stability
or supplementary fixation. When a pelvic discontinuity is encountered we advocate the use
of an acetabular distraction technique with a jumbo cup and modular
porous metal acetabular augments for the treatment of severe acetabular
bone loss and associated chronic pelvic discontinuity. Cite this article:
Ankle replacements have improved significantly since the first reported attempt at resurfacing of the talar dome in 1962. We are now at a stage where ankle replacement offers a viable option in the treatment of end-stage ankle arthritis. As the procedure becomes more successful, it is important to reflect and review the current surgical outcomes. This allows us to guide our patients in the treatment of end-stage ankle arthritis. What is the better surgical treatment – arthrodesis or replacement?
