The aim of this study was to analyze how proximal radial neck resorption (PRNR) starts and progresses radiologically in two types of press-fit radial head arthroplasties (RHAs), and to investigate its clinical relevance. A total of 97 patients with RHA were analyzed: 56 received a bipolar RHA (Group 1) while 41 received an anatomical implant (Group 2). Radiographs were performed postoperatively and after three, six, nine, and 12 weeks, six, nine, 12, 18, and 24 months, and annually thereafter. PRNR was measured in all radiographs in the four radial neck quadrants. The Mayo Elbow Performance Score (MEPS), the abbreviated version of the Disabilities of the Arm, Shoulder, and Hand questionnaire (QuickDASH), and the patient-assessed American Shoulder and Elbow Surgeons score - Elbow (pASES-E) were used for the clinical assessment. Radiological signs of implant loosening were investigated.Aims
Methods
It has been hypothesized that proximal radial neck resorption (PRNR) following press-fit radial head arthroplasty (RHA) is due to stress-shielding. We compared two different press-fit stems by means of radiographs to investigate whether the shape and size of the stems are correlated with the degree of PRNR. The radiographs of 52 RHAs were analyzed both at 14 days postoperatively and after two years. A cylindrical stem and a conical stem were implanted in 22 patients (group 1) and 30 patients (group 2), respectively. The PRNR was measured in the four quadrants of the radial neck and the degree of stem filling was calculated by analyzing the ratio between the prosthetic stem diameter (PSD) and the medullary canal diameter (MCD) at the proximal portion of the stem (level A), halfway along the stem length (level B), and distally at the stem tip (level C).Aims
Methods
The purpose of this study was to report bone adaptive changes after anatomical total shoulder arthroplasty (TSA) using a standard-length hydroxyapatite (HA)-coated humeral component, and to report on a computer-based analysis of radiographs to determine changes in peri-implant bone density objectively. A total of 44 TSAs, performed between 2011 and 2014 using a cementless standard-length humeral component proximally coated with HA, were included. There were 23 males and 21 females with a mean age of 65 years (17 to 65). All shoulders had good quality radiographs at six weeks and five years postoperatively. Three observers graded bone adaptive changes. All radiographs were uploaded into a commercially available photographic software program. The grey value density of humeral radiological areas was corrected to the grey value density of the humeral component and compared over time.Aims
Methods
The aim of this study was to report the mid-term clinical outcome
of cemented unlinked J-alumina ceramic elbow (JACE) arthroplasties
when used in patients with rheumatoid arthritis (RA). We retrospectively reviewed 87 elbows, in 75 patients with RA,
which was replaced using a cemented JACE total elbow arthroplasty
(TEA) between August 2003 and December 2012, with a follow-up of
96%. There were 72 women and three men, with a mean age of 62 years
(35 to 79). The mean follow-up was nine years (2 to 14). The clinical condition
of each elbow before and after surgery was assessed using the Mayo
Elbow Performance Index (MEPI, 0 to 100 points). Radiographic loosening
was defined as a progressive radiolucent line of >1 mm that was
completely circumferential around the prosthesis.Aims
Patients and Methods
Medium-term results of the Discovery elbow replacement
are presented. We reviewed 51 consecutive primary Discovery total
elbow replacements (TERs) implanted in 48 patients. The mean age
of the patients was 69.2 years (49 to 92), there were 19 males and
32 females (37%:63%) The mean follow-up was 40.6 months (24 to 69).
A total of six patients were lost to follow-up. Statistically significant
improvements in range movement and Oxford Elbow Score were found
(p <
0.001). Radiolucent lines were much more common in, and
aseptic loosening was exclusive to, the humeral component. Kaplan–Meier
survivorship at five years was 92.2% (95% CI 74.5% to 96.4%) for
aseptic loosening. In four TERs, periprosthetic infection occurred
resulting in failure. A statistically significant association between
infection and increased BMI was found (p = 0.0268). Triceps failure
was more frequent after the Mayo surgical approach and TER performed
after previous trauma surgery. No failures of the implant were noted. Our comparison shows that the Discovery has early clinical results
that are similar to other semi-constrained TERs. We found continued
radiological surveillance with particular focus on humeral lucency
is warranted and has not previously been reported. Despite advances
in the design of total elbow replacement prostheses, rates of complication
remain high. Cite this article:
Short uncemented humeral stems can preserve humeral
bone stock and facilitate revision surgery but may be prone to malalignment
or loosening, especially when used in reverse total shoulder replacement
(TSR). We undertook a retrospective review of 44 patients with a
mean age of 76 years (59 to 92) who underwent primary reverse TSR
with a short uncemented humeral stem. There were 29 females. The
indications for joint replacement included cuff tear associated
arthropathy (33), avascular necrosis (six), post-traumatic arthritis
(two), and inflammatory arthritis (three). At a mean follow-up of
27 months (24 to 40), pain was rated as mild or none in 43 shoulders
(97.7%). The mean active elevation improved from 54° Cite this article:
