The June 2012 Hip &
Pelvis Roundup360 looks at: whether metal-on-metal is really such a disaster; resurfacings with unexplained pain; large heads and high ion levels; hip arthroscopy for FAI; the inaccuracy of clinical tests for impingement; arthroscopic lengthening of iliopsoas; the OA hip; the injured hamstring – football’s most common injury; an algorithm for hip fracture surgery; and sparing piriformis at THR.
To investigate the differences of open reduction and internal
fixation (ORIF) of complex AO Type C distal radius fractures between
two different models of a single implant type. A total of 136 patients who received either a 2.4 mm (n = 61)
or 3.5 mm (n = 75) distal radius locking compression plate (LCP
DR) using a volar approach were followed over two years. The main
outcome measurements included motion, grip strength, pain, and the
scores of Gartland and Werley, the Short-Form 36 (SF-36) and the
Disabilities of the Arm, Shoulder, and Hand (DASH). Differences
between the treatment groups were evaluated using regression analysis
and the likelihood ratio test with significance based on the Bonferroni
corrected p-value of <
0.003.Objectives
Methods
To study the vascularity and bone metabolism of the femoral head/neck
following hip resurfacing arthroplasty, and to use these results
to compare the posterior and the trochanteric-flip approaches. In our previous work, we reported changes to intra-operative
blood flow during hip resurfacing arthroplasty comparing two surgical
approaches. In this study, we report the vascularity and the metabolic
bone function in the proximal femur in these same patients at one
year after the surgery. Vascularity and bone function was assessed
using scintigraphic techniques. Of the 13 patients who agreed to
take part, eight had their arthroplasty through a posterior approach
and five through a trochanteric-flip approach.Objectives
Methods
To assess the sensitivity and specificity of self-reported osteoporosis
compared with dual energy X-ray absorptiometry (DXA) defined osteoporosis,
and to describe medication use among participants with the condition. Data were obtained from a population-based longitudinal study
and assessed for the prevalence of osteoporosis, falls, fractures
and medication use. DXA scans were also undertaken.Objectives
Methods
Cadaveric models of the shoulder evaluate discrete motion segments
using the glenohumeral joint in isolation over a defined trajectory.
The aim of this study was to design, manufacture and validate a
robotic system to accurately create three-dimensional movement of
the upper body and capture it using high-speed motion cameras. In particular, we intended to use the robotic system to simulate
the normal throwing motion in an intact cadaver. The robotic system
consists of a lower frame (to move the torso) and an upper frame
(to move an arm) using seven actuators. The actuators accurately
reproduced planned trajectories. The marker setup used for motion
capture was able to determine the six degrees of freedom of all
involved joints during the planned motion of the end effector.Objectives
Methods
We aimed first to summarise minimal clinically important differences
(MCIDs) after total hip (THR) or knee replacement (TKR) in health-related
quality of life (HRQoL), measured using the Short-Form 36 (SF-36).
Secondly, we aimed to improve the precision of MCID estimates by
means of meta-analysis. We conducted a systematic review of English and non-English articles
using MEDLINE, the Cochrane Controlled Trials Register (1960–2011),
EMBASE (1991–2011), Web of Science, Academic Search Premier and
Science Direct. Bibliographies of included studies were searched
in order to find additional studies. Search terms included MCID
or minimal clinically important change, THR or TKR and Short-Form
36. We included longitudinal studies that estimated MCID of SF-36
after THR or TKR.Objectives
Methods
The purpose of this study was to examine the effect of posterior
cruciate ligament (PCL) retention, PCL recession, and PCL excision
during cruciate-retaining total knee replacement. A total of 3018 anatomic graduated component total knee replacements
were examined; 1846 of these retained the PCL, 455 PCLs were partially
recessed, and in 717 the PCL was completely excised from the back
of the tibia.Objectives
Methods
An ongoing prospective study to investigate failing metal-on-metal
hip prostheses was commenced at our centre in 2008. We report on
the results of the analysis of the first consecutive 126 failed
mated total hip prostheses from a single manufacturer. Analysis was carried out using highly accurate coordinate measuring
to calculate volumetric and linear rates of the articular bearing
surfaces and also the surfaces of the taper junctions. The relationship
between taper wear rates and a number of variables, including bearing
diameter and orientation of the acetabular component, was investigated.Objectives
Methods
Professor Mario Mercuri passed away suddenly after a complication of cancer on 7th May 2011 after dedicating his entire life to patients with tumours.
The April 2012 Knee Roundup360 looks at the torn ACL, ACL reconstruction, the risk of ACL rupture, the benefit of warm-ups before exercise, glucosamine and tibiofemoral osteoarthritis, sensitisation and sporting tendinopathy, pain relief after TKR, the long-term results of the Genesis I, the gender specific recovery times after TKR, and the accuracy of the orthopaedic eyeball
Chris Lavy is an orthopaedic surgeon in Oxford (UK) who lived and worked in Malawi for ten years. There he helped build an orthopaedic hospital and research unit. He was also one of the founders of COSECSA, the regional college of surgeons for East and Central Africa in 1999.
Pseudotumours (abnormal peri-prosthetic soft-tissue reactions)
following metal-on-metal hip resurfacing arthroplasty (MoMHRA) have
been associated with elevated metal ion levels, suggesting that
excessive wear may occur due to edge-loading of these MoM implants.
This study aimed to quantify The duration and magnitude of edge-loading Objectives
Methods
The April 2012 Oncology Roundup360 looks at chondrosarcoma of the cervical spine, if excision margins matter, radiation-induced sarcomas, giant cell tumours and bone cement, enchondromatosis and malignant change, axial or appendicular Ewing’s sarcoma, and diagnosing a sarcoma
The April 2012 Hip &
Pelvis Roundup360 looks at osteoporotic hip fractures, retrotrochanteric pain, fibrin adhesive and reattachment of articular cartilage, autologous bone marrow mononuclear cells and avascular necrosis, bearing surfaces, stability after THR, digital templating, pelvic tilt after THR, custom-made sockets for DDH, and dogs and THR
The April 2012 Shoulder &
Elbow Roundup360 looks at katakori in Japan, frozen shoulder, if shoulder impingement actually exists, shoulder arthroscopy and suprascapular nerve blocks, why shoulder replacements fail, the infected elbow replacement, the four-part fracture, the acromion index, and arm transplantation
The need to demonstrate probity and fair market competition has increased scrutiny of the relationships between orthopaedic surgeons and the industry that supplies them with their tools and devices. Investigations and judgements from the US Department of Justice and the introduction of the AdvaMed and Eucomed codes have defined new boundaries for interactions between these groups. This article summarises the current interplay between orthopaedic surgeons and industry, and provides recommendations for the future.
