1,721,026 research outputs found
Same same but different—Image-based versus imageless robotic-assisted total knee arthroplasty!
Full text linkRobotic‐assisted total knee arthroplasty (RTKA) has
gained widespread acceptance due to its demon-
strated ability to improve surgical accuracy com-
pared to conventional total knee arthroplasty
(CTKA). While the precise impact of RTKA on
postoperative patient‐reported outcome measures
(PROMs) remains inconclusive, the increased
accuracy in alignment and joint kinematics suggests
potential improvements in patient satisfaction and
functional outcomes. Two primary RTKA systems
exist: image‐based, which uses preoperative CT
scans for detailed 3D modeling, and image‐less,
which relies on intra‐operative digitization of ana-
tomical landmarks. Both systems aim to achieve
accurate implant placement and soft‐tissue bal-
ancing, yet they differ in methodology and reliance
on preoperative data.
Despite RTKA's theoretical advantages, there is
ongoing debate about whether accuracy alone is
sufficient to achieve optimal postoperative out-
comes, particularly concerning joint kinematics
and alignment strategies. Literature reveals no
significant difference in coronal plane alignment
between image‐based and image‐less systems,
though image‐less systems may be more prone to
varus errors due to the reliance on intra‐articular
landmarks. Additionally, image‐free systems may
face challenges in replicating native knee anat-
omy, especially in the sagittal plane, leading to
potential limitations in achieving ideal tibial slope
reconstruction.
The future of RTKA may lie in refining implant po-
sitioning strategies that minimize postoperative al-
terations to pre‐arthritic knee kinematics, particu-
larly with standardized off‐the‐shelf implants. As
robotic technology evolves, there is potential to
enhance surgical outcomes by combining accurac
AI may enable robots to make a clinical impact in total knee arthroplasty, where navigation has not!
Full text linkTotal knee arthroplasty (TKA) is on the verge of
being revolutionized by artificial intelligence (AI),
which will make it possible for robots to have a
clinical influence in areas where navigation systems
have been rendered ineffective. Navigation has
been shown to increase surgical accuracy; never-
theless, it has not been shown to provide major
gains in terms of clinical outcome for the patient. On
the other hand, robotic systems that are powered by
artificial intelligence have the potential to improve
functional outcomes, boost precision, and tailor
procedures to the specific anatomy of each unique
patient. Through the utilization of real‐time data and
prediction algorithms, artificial intelligence‐guided
robots have the potential to overcome the limits of
conventional approaches, thereby establishing a
new benchmark for TKA
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
A new model to predict in vivo human knee kinematics under physiological-like muscle activation
No full textAlthough a number of approaches have attempted to model knee kinematics, rarely have they been validated against in vivo data in a larger subject cohort. Here, we assess the feasibility of four-bar linkage mechanisms in addressing knee kinematics and propose a new approach that is capable of accounting for lengthening characteristics of the ligaments, including possible laxity, as well as the internal/external rotation of the joint. MR scans of the knee joints of 12 healthy volunteers were taken at flexion angles of 0°, 30° and 90° under both passive and active muscle conditions. By reconstructing the surfaces at each position, the accuracy of the four-bar linkage mechanism was assessed for every possible combination of points within each cruciate ligament attachment area. The specific set of parameters that minimized the deviation between the predictions and the in vivo pose was derived, producing a mean error of 1.8 and 2.5 on the medial and 1.7 and 2.4 mm on the lateral side at 30° and 90° flexion, respectively, for passive motion, significantly improving on the models that did not consider internal/external rotation. For active flexion, mean medial errors were 3.3 and 4.7 mm and lateral errors 3.4 and 4.8 mm. Using this best parameter set, a generic predictive model was created and assessed against the known in vivo positions, producing a maximum average error of 4.9 mm at 90° flexion. The accuracy achieved shows that kinematics may be accurately reconstructed for subject specific musculoskeletal models to allow a better understanding of the load distribution within the knee
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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