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  • 1
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    Acetabular morphology in slipped capital femoral epiphysis: Comparison at treatment onset and skeletal maturity
    SAGE Publications ; 2018
    In:  Journal of Children's Orthopaedics Vol. 12, No. 5 ( 2018-10), p. 444-453
    Details
    In: Journal of Children's Orthopaedics, SAGE Publications, Vol. 12, No. 5 ( 2018-10), p. 444-453
    Abstract: To investigate changes in acetabular morphology during the follow-up of slipped capital femoral epiphysis (SCFE) and search for factors associated with acetabular dysplasia at skeletal maturity. Methods We evaluated 108 patients with unilateral SCFE (mean age at slip, 12.3 years sd 1.7) to skeletal maturity, with a minimum follow-up of two years (median 4.5 years; interquartile range 3.2 to 6.2). Acetabular parameters obtained from initial and most recent radiographs included the lateral centre-edge angle (LCEA), Tönnis angle (TA) and acetabular depth-width ratio (ADR). Acetabular dysplasia was considered for LCEA 〈 20° or TA 〉 10°. Femoral parameters consisted of the most recent head diameter, neck-shaft angle, neck length, articulotrochanteric distance and alpha angle. Results At SCFE onset, the affected hip showed a slightly lower LCEA (26.4° sd 6.1° versus 27.3° sd 5.7°; p = 0.01) and ADR (330 sd 30 versus 340 sd 30; p 〈 0.001) compared with the uninvolved hip. At final follow-up, the affected hip showed lower LCEA (24.5° sd 7.6° versus 28.8°sd 6.6°; p 〈 0.001) and ADR (330 sd 40 versus 350 sd 40; p 〈 0.001), and TA was larger (5.5° sd 5.4° versus 2.3° sd 4.2°; p 〈 0.001) compared with the uninvolved hip. Acetabular dysplasia was observed in 27 (25%) of 108 hips with SCFE. Femoral head overgrowth, age at slip and SCFE severity were independent factors associated with acetabular dysplasia (p 〈 0.05). Conclusion Acetabular coverage and depth are not increased in SCFE, and the acetabular coverage tends to decrease up to skeletal maturity. A potential disturbance in the acetabular growth and remodelling exists mainly for young children with severe SCFE, and a potential for acetabular insufficiency may be observed at the diagnosis and follow-up of SCFE. Level of Evidence Prognostic Level IV
    Type of Medium: Online Resource
    ISSN: 1863-2521 , 1863-2548
    URL: Article
    DOI: 10.1302/1863-2548.12.180057
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2268264-8
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  • 2
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    Age- and gender-specific variations of the epiphyseal tilt and epiphyseal angle in adolescents without hip pathology
    SAGE Publications ; 2018
    In:  Journal of Children's Orthopaedics Vol. 12, No. 2 ( 2018-04), p. 152-159
    Details
    In: Journal of Children's Orthopaedics, SAGE Publications, Vol. 12, No. 2 ( 2018-04), p. 152-159
    Abstract: To determine age-and gender-dependent variation of epiphyseal tilt and epiphyseal angle using CT in adolescents without hip pathology. Methods Pelvic CT scans were obtained in 132 adolescents for evaluation of abdominal pain. Radially oriented planes around the femoral neck were reformatted and the epiphyseal tilt and angle were measured in the anterior, anterosuperior and superior planes. Variations in the tilt angle and epiphyseal angle were assessed by age group from 12 to 18 years and gender by using a linear mixed model analysis. Results The epiphyseal tilt did not change (p = 0.97) with increasing age. Male patients exhibited smaller tilt angle in the anterosuperior plane (p = 0.003) but no difference was detected in the anterior (p = 0.17) or superior (p = 0.06) planes. The epiphyseal angle decreased with increasing age in the anterior (p = 0.03), anterosuperior (p = 0.001) and superior (p 〈 0.001) planes in male patients, with no variation in female patients (p = 0.92). Male patients had larger epiphyseal angles in the anterior (p = 0.02), anterosuperior (p 〈 0.001) and superior (p = 0.002) planes compared with female patients. Conclusion We found no age-specific variations in the epiphyseal tilt and no difference in the epiphyseal tilt in male and female patients in the superior and anterior plane. The epiphyseal angle was smaller in female patients, however, the epiphyseal angle decreased with increasing age in male patients which corresponds to an increase in epiphyseal extension. The reference values reported in this study may serve as additional information in the evaluation of adolescents with hip pain and as reference for future studies investigating slipped capital femoral epiphysis and femoroacetabular impingement development. Level of Evidence Level III Diagnostic Study
    Type of Medium: Online Resource
    ISSN: 1863-2521 , 1863-2548
    URL: Article
    DOI: 10.1302/1863-2548.12.170193
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2268264-8
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  • 3
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    Obesity is a major risk factor for the development of complications after peri-acetabular osteotomy
    British Editorial Society of Bone & Joint Surgery ; 2015
    In:  The Bone & Joint Journal Vol. 97-B, No. 1 ( 2015-01), p. 29-34
    Details
    In: The Bone & Joint Journal, British Editorial Society of Bone & Joint Surgery, Vol. 97-B, No. 1 ( 2015-01), p. 29-34
    Abstract: Obesity is a risk factor for complications following many orthopaedic procedures. The purpose of this study was to investigate whether obesity was an independent risk factor increasing the rate of complications following periacetabular osteotomy (PAO) and to determine whether radiographic correction after PAO was affected by obesity. We retrospectively collected demographic, clinical and radiographic data on 280 patients (231 women; 82.5% and 49 men; 17.5%) who were followed for a mean of 48 months (12 to 60) after PAO. A total of 65 patients (23.2%) were obese (body mass index (BMI) 〉 30 kg/m 2 ). Univariate and multivariate analysis demonstrated that BMI was an independent risk factor associated with the severity of the complications. The average probability of a patient developing a major complication was 22% (95% confidence interval (CI) 11.78 to 38.21) for an obese patient compared with 3% (95% CI 1.39 to 6.58) for a non-obese patient The odds of a patient developing a major complication were 11 times higher (95% CI 4.71 to 17.60, p  〈  0.0001) for an obese compared with a non-obese patient. Following PAO surgery, there was no difference in radiographic correction between obese and non-obese patients. PAO procedures in obese patients correct the deformity effectively but are associated with an increased rate of complications. Cite this article: Bone Joint J 2015;97-B:29–34.
    Type of Medium: Online Resource
    ISSN: 2049-4394 , 2049-4408
    URL: Article
    DOI: 10.1302/0301-620X.97B1.34014
    Language: English
    Publisher: British Editorial Society of Bone & Joint Surgery
    Publication Date: 2015
    detail.hit.zdb_id: 2697480-0
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  • 4
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    Preliminary results of an anteverting triple periacetabular osteotomy for the treatment of hip instability in down syndrome
    SAGE Publications ; 2018
    In:  Journal of Children's Orthopaedics Vol. 12, No. 1 ( 2018-02), p. 55-62
    Details
    In: Journal of Children's Orthopaedics, SAGE Publications, Vol. 12, No. 1 ( 2018-02), p. 55-62
    Abstract: To investigate the outcomes of an anteverting triple periacetabular osteotomy for the treatment of hip instability in skeletally immature patients with Down syndrome. Methods We evaluated 16 patients (21 hips) with Down syndrome and hip instability who underwent an anteverting triple periacetabular osteotomy between 2007 and 2016. There were nine females and seven males with an average age of 7.4 years SD 2.0. We assessed the level of hip pain, gait ability and clinical stability at a minimum of one year after surgery. Radiographic evaluation included pre- and postoperative lateral centre-edge angle (LCEA), Tönnis acetabular angle and extrusion index. Result After an average follow-up of 4.1 years SD 2.6, 20 of 21 hips (95%) remained clinically stable. In all, 12 of 16 (75%) patients had a full gait without a major limp, but three patients (19%) had a persistent limp. Of the 21 procedures, one hip (5%) was considered a failure due to persistent instability. There was a mean increase of 18.3º SD 15.3º of the LCEA (p 〈 0.001); a mean decrease of 15.2º SD 11.6º (p 〈 0.001) for the Tönnis angle and the extrusion index had a mean decrease of 0.27 SD 0.20 (p 〈 0.001). The most common complications were minor and included nonunion of the pubis or ischium (24%) and stress fractures of the pubis and ischium (14%). Only one patient required unplanned surgery for the treatment of an infection; which was considered a major complication. Conclusion The anteverting triple periacetabular osteotomy provided global deformity correction and achieved hip stability in 95% of the hips after a mean follow-up of 4.1 years. Level of Evidence Therapeutic level IV.
    Type of Medium: Online Resource
    ISSN: 1863-2521 , 1863-2548
    URL: Article
    DOI: 10.1302/1863-2548.12.170174
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
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  • 5
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    Obesity is a major risk factor for the development of complications after peri-acetabular osteotomy
    British Editorial Society of Bone & Joint Surgery ; 2015
    In:  The Bone & Joint Journal Vol. 97-B, No. 1 ( 2015-01-01), p. 29-34
    Details
    In: The Bone & Joint Journal, British Editorial Society of Bone & Joint Surgery, Vol. 97-B, No. 1 ( 2015-01-01), p. 29-34
    Type of Medium: Online Resource
    ISSN: 2049-4394
    URL: Article
    DOI: 10.1302/0301-620X.97B1/34014
    Language: English
    Publisher: British Editorial Society of Bone & Joint Surgery
    Publication Date: 2015
    detail.hit.zdb_id: 2697480-0
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  • 6
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    Proceedings of the 3rd IPLeiria’s International Health Congress : Leiria, Portugal. 6-7 May 2016
    Springer Science and Business Media LLC ; 2016
    In:  BMC Health Services Research Vol. 16, No. S3 ( 2016-7)
    Details
    In: BMC Health Services Research, Springer Science and Business Media LLC, Vol. 16, No. S3 ( 2016-7)
    Type of Medium: Online Resource
    ISSN: 1472-6963
    URL: Article
    DOI: 10.1186/s12913-016-1423-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2016
    detail.hit.zdb_id: 2050434-2
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  • 7
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    ACKNOWLEDGEMENT OF REVIEWERS
    Elsevier BV ; 2011
    In:  Clinical Microbiology and Infection Vol. 17, No. 1 ( 2011-01), p. 102-103
    Details
    In: Clinical Microbiology and Infection, Elsevier BV, Vol. 17, No. 1 ( 2011-01), p. 102-103
    Type of Medium: Online Resource
    ISSN: 1198-743X
    URL: Article
    DOI: 10.1111/j.1469-0691.2010.03428.x
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2011
    detail.hit.zdb_id: 2020034-1
    SSG: 12
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  • 8
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    J-PLUS: The Javalambre Photometric Local Universe Survey
    EDP Sciences ; 2019
    In:  Astronomy & Astrophysics Vol. 622 ( 2019-02), p. A176-
    Details
    In: Astronomy & Astrophysics, EDP Sciences, Vol. 622 ( 2019-02), p. A176-
    Abstract: The Javalambre Photometric Local Universe Survey (J-PLUS ) is an ongoing 12-band photometric optical survey, observing thousands of square degrees of the Northern Hemisphere from the dedicated JAST/T80 telescope at the Observatorio Astrofísico de Javalambre (OAJ). The T80Cam is a camera with a field of view of 2 deg 2 mounted on a telescope with a diameter of 83 cm, and is equipped with a unique system of filters spanning the entire optical range (3500–10 000 Å). This filter system is a combination of broad-, medium-, and narrow-band filters, optimally designed to extract the rest-frame spectral features (the 3700–4000 Å Balmer break region, H δ , Ca H+K, the G band, and the Mg b and Ca triplets) that are key to characterizing stellar types and delivering a low-resolution photospectrum for each pixel of the observed sky. With a typical depth of AB ∼21.25 mag per band, this filter set thus allows for an unbiased and accurate characterization of the stellar population in our Galaxy, it provides an unprecedented 2D photospectral information for all resolved galaxies in the local Universe, as well as accurate photo- z estimates (at the δ   z /(1 +  z )∼0.005–0.03 precision level) for moderately bright (up to r  ∼ 20 mag) extragalactic sources. While some narrow-band filters are designed for the study of particular emission features ([O  II ]/ λ 3727, H α / λ 6563) up to z   〈  0.017, they also provide well-defined windows for the analysis of other emission lines at higher redshifts. As a result, J-PLUS has the potential to contribute to a wide range of fields in Astrophysics, both in the nearby Universe (Milky Way structure, globular clusters, 2D IFU-like studies, stellar populations of nearby and moderate-redshift galaxies, clusters of galaxies) and at high redshifts (emission-line galaxies at z  ≈ 0.77, 2.2, and 4.4, quasi-stellar objects, etc.). With this paper, we release the first ∼1000 deg 2 of J-PLUS data, containing about 4.3 million stars and 3.0 million galaxies at r   〈  21 mag. With a goal of 8500 deg 2 for the total J-PLUS footprint, these numbers are expected to rise to about 35 million stars and 24 million galaxies by the end of the survey.
    Type of Medium: Online Resource
    ISSN: 0004-6361 , 1432-0746
    URL: Article
    DOI: 10.1051/0004-6361/201833036
    RVK:
    UA 1000
    RVK:
    US 1090
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 1458466-9
    SSG: 16,12
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  • 9
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    The Southern Photometric Local Universe Survey (S-PLUS): improved SEDs, morphologies, and redshifts with 12 optical filters
    Oxford University Press (OUP) ; 2019
    In:  Monthly Notices of the Royal Astronomical Society Vol. 489, No. 1 ( 2019-10-11), p. 241-267
    Details
    In: Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP), Vol. 489, No. 1 ( 2019-10-11), p. 241-267
    Abstract: The Southern Photometric Local Universe Survey (S-PLUS) is imaging ∼9300 deg2 of the celestial sphere in 12 optical bands using a dedicated 0.8 m robotic telescope, the T80-South, at the Cerro Tololo Inter-american Observatory, Chile. The telescope is equipped with a 9.2k × 9.2k e2v detector with 10 $\rm {\mu m}$ pixels, resulting in a field of view of 2 deg2 with a plate scale of 0.55 arcsec pixel−1. The survey consists of four main subfields, which include two non-contiguous fields at high Galactic latitudes (|b| & gt; 30°, 8000 deg2) and two areas of the Galactic Disc and Bulge (for an additional 1300 deg2). S-PLUS uses the Javalambre 12-band magnitude system, which includes the 5 ugriz broad-band filters and 7 narrow-band filters centred on prominent stellar spectral features: the Balmer jump/[OII], Ca H + K, H δ, G band, Mg b triplet, H α, and the Ca triplet. S-PLUS delivers accurate photometric redshifts (δz/(1 + z) = 0.02 or better) for galaxies with r & lt; 19.7 AB mag and z & lt; 0.4, thus producing a 3D map of the local Universe over a volume of more than $1\, (\mathrm{Gpc}/h)^3$. The final S-PLUS catalogue will also enable the study of star formation and stellar populations in and around the Milky Way and nearby galaxies, as well as searches for quasars, variable sources, and low-metallicity stars. In this paper we introduce the main characteristics of the survey, illustrated with science verification data highlighting the unique capabilities of S-PLUS. We also present the first public data release of ∼336 deg2 of the Stripe 82 area, in 12 bands, to a limiting magnitude of r = 21, available at datalab.noao.edu/splus.
    Type of Medium: Online Resource
    ISSN: 0035-8711 , 1365-2966
    URL: Article
    DOI: 10.1093/mnras/stz1985
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2016084-7
    SSG: 16,12
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  • 10
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    J-PLUS: On the identification of new cluster members in the double galaxy cluster A2589 and A2593 using PDFs
    EDP Sciences ; 2019
    In:  Astronomy & Astrophysics Vol. 622 ( 2019-2), p. A178-
    Details
    In: Astronomy & Astrophysics, EDP Sciences, Vol. 622 ( 2019-2), p. A178-
    Abstract: Aims. We aim to use multiband imaging from the Phase-3 Verification Data of the J-PLUS survey to derive accurate photometric redshifts (photo-z) and look for potential new members in the surroundings of the nearby galaxy clusters A2589 ( z = 0.0414) & A2593 ( z = 0.0440), using redshift probability distribution functions (PDFs). The ultimate goal is to demonstrate the usefulness of a 12-band filter system in the study of largescale structure in the local Universe. Methods. We present an optimized pipeline for the estimation of photometric redshifts in clusters of galaxies. This pipeline includes a PSF-corrected photometry, specific photometric apertures capable of enhancing the integrated signal in the bluest filters, a careful recalibration of the photometric uncertainties and accurate upper-limit estimations for faint detections. To foresee the expected precision of our photo-z beyond the spectroscopic sample, we designed a set of simulations in which real cluster galaxies are modeled and reinjected inside the images at different signal-to-noise ratio (S/N) levels, recomputing their photometry and photo-z estimates. Results. We tested our photo-z pipeline with a sample of 296 spectroscopically confirmed cluster members with an averaged magnitude of ⟨ r ⟩ = 16.6 and redshift ⟨ z ⟩ = 0.041. The combination of seven narrow and five broadband filters with a typical photometric-depth of r ~ 21.5 provides δ z /(1 + z ) = 0.01 photo-z estimates. A precision of δ z /(1 + z ) = 0.005 is obtained for the 177 galaxies brighter than magnitude r 〈 17. Based on simulations, a δ z /(1 + z ) = 0.02 and δ z /(1 + z ) = 0.03 is expected at magnitudes ⟨ r ⟩ = 18 and ⟨ r ⟩ = 22, respectively. Complementarily, we used SDSS/DR12 data to derive photo-z estimates for the same galaxy sample. This exercise demonstrates that the wavelength-resolution of the J-PLUS data can double the precision achieved by SDSS data for galaxies with a high S/N. Based on the Bayesian membership analysis carried out in this work, we find as much as 170 new candidates across the entire field (~5 deg 2 ). The spatial distribution of these galaxies may suggest an overlap between the systems with no evidence of a clear filamentary structure connecting the clusters. This result is supported by X-ray Rosat All-Sky Survey observations suggesting that a hypothetical filament may have low density contrast on diffuse warm gas. Conclusions. We prove that the addition of the seven narrow-band filters make the J-PLUS data deeper in terms of photo-z-depth than other surveys of a similar photometric-depth but using only five broadbands. These preliminary results show the potential of J-PLUS data to revisit membership of groups and clusters from nearby galaxies, important for the determination of luminosity and mass functions and environmental studies at the intermediate and low-mass regime.
    Type of Medium: Online Resource
    ISSN: 0004-6361 , 1432-0746
    URL: Article
    DOI: 10.1051/0004-6361/201731348
    RVK:
    UA 1000
    RVK:
    US 1090
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2019
    detail.hit.zdb_id: 1458466-9
    SSG: 16,12
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