Background
Total hip arthroplasty is a successful treatment for hip osteoarthritis. Primary and secondary implant fixation is dependent on implant design and plays an important role in the longevity ...of an implant. In this study, we assessed the self-locking cementless Master
SL
femoral stem.
Materials and methods
In this single-centre prospective study, 50 consecutive hips with the indication for total hip arthroplasty, who met the inclusion criteria, received the Master
SL
stem from LIMA Corporate. Patients had pre- and post-operative clinical and radiological assessment and completed patient-reported outcome measures Oxford Hip Score (OHS), Harris Hip Score (HHS) and Forgotten Joint Score (FJS) at the 6-week and 6-, 12- and 24-month mark. Post-operative X-rays were assessed for osteointegration (Engh Score), alignment and subsidence.
Results
After 2 years, aseptic survival was 100%. One hip had to be explanted due to early deep infection and was excluded from the study. At 2 years, the patients reported a significant improved HHS and OHS of 95.3 ± 5.8 and 46.1 ± 3.6 (mean ± standard deviation), respectively, compared to preoperatively. The mean ± standard deviation for the FJS was 86.4 ± 18.7 with two-thirds of the patients reporting a score above 85. The mean Engh score is 15.1 ± 5.9 (mean ± standard deviation) with no patient scoring below 1 which suggests good osteointegration in all femoral stems.
Conclusions
The Master
SL
femoral stem performed well in this short-term follow-up study, with high patient satisfaction and good signs of osteointegration. Long-term follow-up will be necessary to evaluate longevity.
Level of evidence
Level 3, Prospective cohort study.
Trial registration
The study was registered on the 30.03.2016 with Australia New Zealand Clinical Trials Registry (ACTRN12617000550303).
The article Short‑term results of a new self‑locking cementless femoral stem: a prospective cohort study of the Lima Master
SL
, written by C. E. Dlaska, I. A. Jovanovic, A. L. Grant, G. Graw, M. P. ...Wilkinson, K. Doma, K. Hazratwala, was originally published electronically on the publisher’s internet portal on 02 March 2020 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on 12 December 2020.
A (p, t) study of eight nuclei in the rare earth region identified 96 0+ states (67 new). Their density at low energy is used to corroborate a fundamental property of quantum phase transitional ...behavior and to provide a new signature of nuclei near the critical point.
The HERMES polarized atomic beam source Nass, A.; Baumgarten, C.; Braun, B. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2003, Letnik:
505, Številka:
3
Journal Article
Recenzirano
Odprti dostop
The HERMES atomic beam source is used to provide nuclear polarized hydrogen or deuterium atoms for the HERMES target. The setup including the dissociator, the sextupole magnet system and the ...high-frequency transitions is described. Measurements of the hydrogen intensity of up to
6.4×10
16
atoms/
s
in two hyperfine substates and of the deuterium intensity of up to
5.8×10
16
atoms/
s
in three hyperfine substates are presented. A degree of dissociation of 92.8% for H (94.5% for D) at the entrance of the storage cell and a nuclear polarization of around 0.97 (H) and 0.92 (D) have been found constant within a couple of percent over the whole running period of the HERMES experiment.
The design of our source of negatively charged, intense and brilliant DC beams of polarized hydrogen and deuterium ions was motivated by the excellent performance of the HERMES atomic beam source and ...the successful operation of a polarized ion source at TUNL. Deviating from their 30
K atomic beam technology we combine an 80
K atomic beam source (ABS) with subsequent ionization in an electron cyclotron resonance (ECR) plasma. In a separate unit, negative ions are obtained by successive two electron pickup from cesium in a vapour jet target. Our ABS provides a flux of
6.4
×
10
16
atoms
/
s
for hydrogen and of about
5
×
10
16
atoms
/
s
for deuterium into a compression tube of 10
mm diameter and 100
mm length. Polarized negative
D
-
⇒
/
H
-
⇒
ion beams of about
9
μ
A
/
15
μ
A
with an emittance of
20
π
mm
rad
eV
have been observed. After tandem acceleration we have polarized beam intensity of
2
μ
A
on target of the Q3D spectrograph. The measured vector polarizations of the
D
⇒
and
H
⇒
ion beams are 72% and 67%, respectively, in accordance with expectations from source operation data. Using an external gas inlet for the ECR region, intense beams of unpolarized
1
H
-
,
2
D
-
,
3
He
-
, and
4
He
-
ions are obtained.
In the doubly magic nucleus
208
Pb , five states are observed at 5648, 5658, 5686, 5694, 5836keV by
208
Pb (
p
,
p′
) via isobaric analog resonances in
209
Bi . The 5686, 5694, 5836 states with spins ...6
-
, 7
-
, 8
-
are shown to contain almost the full strength of the particle-hole configuration
g
9/2
f
7/2
. The 5658 5
-
state contains a major
g
9/2
f
7/2
fragment with admixtures of
d
5/2
f
5/2
,
d
5/2
f
7/2
. The 5648, 5649keV states observed in a quintuplet at
E
x
= 5.63 - 5.65 MeV are preliminarily identified to have spins (4)
-
and 6
+
to 9
+
. The 5648keV (4)
-
state contains almost half of the
g
9/2
f
7/2
strength and half of the
h
9/2
d
5/2
strength with admixtures of
d
5/2
f
5/2
,
d
5/2
p
3/2
,
d
5/2
f
7/2
.
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