bluuebunny/crossref_metadata_2025_split huggingface dataset:
Newsletter Fall 2020: Clinician Investigator Trainee Association of Canada (CITAC)
Authors: Castanov Valera , Zeng Andy , Behrouzi Bahar , Macklin Jillian , Hu Sophie , Pietrobon Adam , Marvasti Tina B. 
Published: September 2020

Message from the CITAC president
To say that 2020 has been an unprecedented year is an understatement. The coronavirus disease 2019 (COVID-19) global pandemic and the major societal awakening on racial equity and justice have led us to reflect on our direction, goals and mission. Thanks to our talented and dedicated executive team, we were able to pivot our efforts and adapt to the changing landscape of research and advocacy. In April, we provided our members with a list of resources to help facilitate a smooth transition to working from home. In June, we published Clinician Investigator Trainee Association of Canada’s (CITAC) press release on our role in combating anti-Black discrimination and racial injustice and have outlined specific advocacy efforts that we will be committing to over the next years (the full statement can be found on our website, https://www.citac-accfc.org).
Apresentação
Authors: Botta Ferrante Vera Lúcia Silveira , Andreatta Whitaker Dulce Consuelo , Carmona Duval Henrique 
Published: September 2020

Nosso periódico - Retratos de Assentamento - surgiu paralelamente às políticas públicas de reforma agrária no período de redemocratização do país - daí o título sob o qual se consagrou.
O tema “assentamentos” era altamente relevante (como ainda é) dada a emergência de novos espaços e novos atores sociais no campo brasileiro - categorias sociais a exigir, continuadamente, compreensão teórica e acompanhamento de seus desafios e dilemas.
Enquanto nos aprofundávamos nos estudos desse aspecto complexo do novo rural brasileiro, não podíamos deixar de lado o fato de que o rural da Reforma Agrária fazia parte da questão da terra no Brasil e fomos nos abrindo para novas abordagens, contemplando a questão agrária e a variedade de nossas ruralidades, inclusive a problemática dos povos tradicionais (e/ou originais).
Assim, nunca entendemos ou aceitamos que o conhecimento científico seja desligado dos problemas que afetam a humanidade e contribuem para devastar a natureza e desarticular culturas. Muito ao contrário, nosso periódico acolhe pesquisas que trazem denúncias. E também aquelas que anunciam a esperança.
Pois bem! O momento brasileiro é quase de desesperança: um governo de extrema-direita, associado a um vírus letal que facilita projetos genocidas; conquistas sociais das últimas décadas ameaçadas e o fascismo em alta...
SISTEM MANAJEMEN PENGELOLAAN HUTAN FSC, PEFC, ISO 38200:2018 DAN PENGARUHNYA TERHADAP KINERJA INDUSTRI KAYU DI INDONESIA
Authors: Purwanto Agus , Asbari Masduki , Prameswari Mirza , Pramono Rudy 
Published: September 2020

The purpose of this study was to determine the effect of FSC Chain of Custody forest management, PEFC Sustainable Forest Management and ISO 38200 Chain of wood custody and wood-based products on the performance of the wood industry business in Indonesia performance indicators namely customer satisfaction, increased sales and productivity. This research was conducted in several companies that process wood or use wood as the main material in Indonesia with 400 respondents. Respondents are wood industry employees as top management, managers and staff who have a planor have implemented FSC, PEFC and ISO 38200. The background of this study is due to the lack of PEFC, FSC and ISO 38200 research on wood in Indonesia. Data collection was carried out by distributing electronic online questionnaires in August to November 2019 and analyzing data processing using Structural Equation Model (SEM) and Linear Structural Model (LISREL) software version 8.70. The results of the analysis show that FSC Chain of Custody, PEFC Sustainable Forest Management and ISO 38200 Chain of custody from wood and wood-based affect the business significantly and positively such as increased customer satisfaction, increased sales and increased productivity.Keywords: FSC, Forest Management, ISO 38200, PEFC.Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pengelolaan hutan FSC Chain of Custody, PEFC Sustainable Forest Management dan ISO 38200 Chain of custody kayu dan produk berbasis kayu terhadap kinerja bisnis industri kayu di Indonesia indikator kinerja yaitu kepuasan Pelanggan, peningkatan penjualan dan produktivitas. Penelitian ini dilakukan di beberapa perusahaan yang mengolah kayu atau menggunakan kayu sebagai bahan utama di Indonesia dengan 400 responden. Responden adalah karyawan industri kayu sebagai manajemen puncak, manajer dan staf yang memiliki planor telah menerapkan FSC, PEFC dan ISO 38200. Latar belakang penelitian ini adalah karena kurangnya penelitian PEFC, FSC dan ISO 38200 pada kayu di Indonesia. Pengumpulan data dilakukan dengan mendistribusikan kuesioner online elektronik pada Agustus hingga November 2019 dan menganalisis pemrosesan data menggunakan Structural Equation Model (SEM) dan software Linear Structural Model (LISREL) versi 8.70. Hasil analisis menunjukkan bahwa FSC Chain of Custody, PEFC Sustainable Forest Management dan ISO 38200 Chain of custody dari kayu dan berbahan dasar kayu mempengaruhi bisnis secara signifikan dan positif seperti peningkatan kepuasan pelanggan, Peningkatan penjualan dan peningkatan produktivitas.Kata Kunci: FSC, ISO 38200, PEFC, Pengelolaan Hutan.
Feasability of A-mode Ultrasound Based Registration to Track Scapula Motion : A Simulation Study
Authors: Guinebretiere Octave , Giles J.W. 
Published: September 2020

We describe an A-mode ultrasound-based scapula tracker for pre-operative diagnosis and planning. One paper investigated this technology but did not assess its rotational accuracy, which is the critical variable. Therefore, we ran simulations and optimizations to investigate whether this technology’s rotational accuracy was adequate to make this a viable tool.Simulations were created by converting a CT-derived scapula into an even density point cloud and positioning it in a neutral pose (our ground truth). This was reposed to a known mid-range motion, and its points were randomly sampled to mimic the data yielded by an array of single- element A-mode ultrasound transducers. This sampled dataset was registered to the ground truth using ICP, and to determine the resultant error, the resulting transformation was compared to the known transformation applied to the ground truth. The Monte Carlo method was applied to this simulation to yield varying samplings; as well, the samples were subjected to varying levels of random noise (replicating ultrasound error) to assess robustness. The effects of the number of sample points and their location were also investigated.For 10 simulated sensors in an optimized pattern across the scapula, corrupted by random error, registration rotational errors for a sagittal plane 70◦ shoulder flexion were 0.82◦ ± 0.63◦ for posterior tilting, 0.68◦ ± 0.6◦ for upward rotation and 0.54◦ ± 0.54◦ for internal rotation.We have successfully demonstrate that, in this simulation study, a clinically viable number of ultrasound sensors (∼ 10) could yield adequate accuracy to be diagnostically useful, if they are properly distributed across the scapula.
Intra-Operative Soft Tissue Targets For Improved Outcomes In Total Knee Arthroplasty
Authors: Wakelin Edgar , Shalhoub Sami , Lawrence Jeffrey , Keggi John , DeClaire Jeffrey , Randall Amber , Ponder Corey , Koenig Jan , Plaskos Christopher 
Published: September 2020

A poorly balanced, unstable or stiff joint is a leading cause of dissatisfaction and revision after surgery. The quantitative definition of a well-balanced joint, however, remains a source of controversy. This study investigates joint gaps measured by a digitally-controlled ligament tensioning device throughout flexion and its effect on post- operative outcome.Surgeries were performed using the OMNIBotics robot-assisted TKA platform and BalanceBot device. Joint gaps were recorded by the BalanceBot throughout flexion during trialing. Knee Injury and Osteoarthritis Outcome Score (KOOS) was collected at 1-year post-op. Correlations between joint gaps and KOOS outcome were investigated.Knees that reported: a medial gap ≤ lateral gap in extension (p = 0.007, median ∆ = 8.3); an average joint gap of between 1 mm tighter and 1 mm looser than the final insert thickness in midflexion (p = 0.006, median ∆ = 5.5); and an imbalance of less than 1.5 mm in flexion (p = 0.012, median ∆ = 2.8) reported significantly improved pain scores. Patients which satisfied both extension and flexion criteria, or midflexion and flexion criteria reported improved outcomes compared to those which satisfied only one or neither criterion (p = 0.0002, median ∆ = 9.7, p = 0.0019, median ∆ = 8.4 respectively).KOOS Pain scores correlated with joint gap measurements across all flexion angles investigated. Combining joint gap windows, subgroups of patients were found that reported a change in the median KOOS Pain outcome beyond the minimally clinically important difference.
Variation of the femoral J-Curve in the native knee
Authors: Grothues Sonja A. G. A. , Asseln Malte , Radermacher Klaus 
Published: September 2020

The J-Curve in the native knee as well as the femoral component’s J-Curve after total knee arthroplasty are known to have a high influence on kinematics. Furthermore, the J-Curve’s shape affects ligament strain and tension and consequently already slight changes may strongly alter knee forces and stability. To optimize current implants’ J-Curve design with regard to the population’s morphology, information about the main sources of contour variation is necessary.In this study, a principal component analysis (PCA) was performed on the medial and lateral femoral J-Curves of 90 cadavers without history of osteoarthritis. The J-Curves’ mean shapes were further investigated by geometric parameter analysis and effect sizes were calculated for the first three principal components (PCs). In addition, a combined PCA for both sides was performed and evaluated qualitatively. The results were compared with the variation in standard implants’ J-Curve shape.The isolated PCA of medial and lateral J-Curves resulted in PCs involving changes in contour orientation, arc length, scaling and circularity. The combined PCA of both sides resulted in PCs comprising combinations of the individual variations together with changes in relative position. In contrast, the qualitative evaluation of J-Curves from 2 different standard implant systems revealed no visible changes in shape but only changes in size.Limitations of this study were the restriction to a 2-dimensional contour derivation and the sole consideration of the femoral contours. Nevertheless, the sagittal variability in the medial, lateral and combined femoral J-Curves should be considered in implant design.
Optimizing TKA Positioning via Intraoperative Ligament Characterization
Authors: Orsi Alexander , Wakelin Edgar , Shalhoub Sami , Lawrence Jeffrey , Ponder Corey , Keggi John , Plaskos Christopher 
Published: September 2020

The goal of total knee arthroplasty (TKA) is to position the prosthesis with a bal- anced soft tissue envelope throughout the flexion cycle. Determining a desirable amount of ligament tension is crucial as instability is a leading cause for revision surgery. This is challenging due to the subject specific, and non-linear, nature of ligament mechanical properties. This study aims to characterize ligament stiffness profiles intraoperatively and identify the stiffness transition point (STP) using a ligament balancing robot. The study will also identify how the surgeon selected joint force relates to the stiffness transition point.45 patients were reviewed. After the proximal tibial resection, intraoperative assessment of the medial and lateral ligaments was performed via a load cycle ramped up from 50N to 120N, then down from 120N to 50N. This was performed at extension (10◦) and in flexion (90◦). Force and displacement data were processed to determine the stiffness profiles for the medial and lateral soft tissue envelope. A bilinear fit model was used to determine the slopes and STP.The average STP was between 83N and 90N, varying widely with standard deviations approaching 14N. The median joint tension selected by the surgeon was 80N. On average the selected joint force was 3N to 8.9N below the STP.The medial compartment behaved similarly in extension and flexion. The lateral com- partment had higher stiffness in extension than in flexion. Across all loading conditions, the down-cycle data was more consistent than the up-cycle data.The STP is a proposed target for ligament tension as this theoretically avoids the high stiffness regime. The results show the joint tension selected by the surgeons, based on their experience and intraoperative feel, is similar to the STP. Due to the high patient variability observed in the STP, using a patient specific method to determine the joint tension is recommended. Future work will investigate how joint tension relative to the STP affects patient outcomes. This will provide insight into optimizing joint tension during TKA.
Kinematic Analysis of Total Knee Arthroplasty(TKA) using Orthosensor system: Externally rotated femoral prosthesis versus Traditional design prosthesis
Authors: Na Seung-Min , Kim Gun-Woo , Lee Nam-Hun , Chung Young-Woo , Seon Jongkeun , Song Eun-Kyoo 
Published: September 2020

Purpose The purpose of this study was to elucidate kinematic change according to the implant’s specific femoral rotation by using orthosensor implant with three degrees external rotation of femoral rotation rebuilt and traditional TKA implant without rebuilt of the femoral rotation .Methods Twenty-eight patients (34 knees) underwent TKA using traditional TKA implant and 16 patients (22 knees) underwent TKA using implant with three degrees external rotation of femoral rotation. Patients were followed up for at least 1 year. Mean age of patients was 71.1 years (range, 60 to 80 years) at the time of surgery. After implantation of femur and tibial components, we applied the orthosensor system, to evaluate femoral rollback of the new artificial joint. Femoral rollback was analyzed using digitized screenshot function of orthosensor system.Results Overall femoral tracking proportion regardless of implants was significantly higher on the medial compartment compared to that on the lateral compartment (13.3 ± 8.4% vs. 6.3 ± 5.0%, p &lt; 0.001). Regarding femoral tracking according to each compartment, externally rotated femoral prosthesis and traditional prosthesis showed 12.1 ± 8.2% and 14.2 ± 8.6% (p = 0.371) on the medial compartment and 8.0 ± 5.8% and 5.2 ± 4.2% (p = 0.059) on the lateral compartment, respectively.Conclusion Our study showed reverse femoral roll-back movement with higher tracking distance on the lateral compartment during TKA. externally rotated femoral prosthesis TKA system with femoral component 3-degree rebuilt showed less roll-back difference between medial and lateral compartments compared to traditional TKA system. Fortunately, both TKA systems had excellent short-term clinical outcomes without having significant difference between the two. With longer follow-up and larger cohort, the advantage and effectiveness of femoral component rotation can be elucidated in the future.
Robotic vs Navigational vs Conventional Primary Total Knee Arthroplasty. Clinical and Radiological Long-Term Results with a Minimum Follow-up of 10 years -Survivalship Analysis-
Authors: Na Seung-Min , Kim Gun-Woo , Nam-Hun Lee , Chung Young-Woo , Seon Jongkeun , Song Eun-Kyoo 
Published: September 2020

The aim of this study was (1) to compare the clinical and radiological outcomes of robotic, navigational and conventional total knee arthroplasty with a minimum follow-up of 10 years, (2) to evaluate the survival rate, (3) and to estimate the accuracy of the three techniques by analyzing the outliers of the total knee arthroplasty (TKA) patients.Methods From January 1992 to December 2008, We evaluated 515 knees who underwent robotic TKA, navigational TKA, or conventional TKA with minimum follow-up of 10 years. Finally, this study including 92 patients (103 knees) who underwent robotic total knee arthroplasty using ROBODOC® , 197 patients (225 knees) who underwent navigational total knee arthroplasty using Orthopilot, and 175 patients (187 knees) who underwent conventional total knee arthroplasty. Hospital for special surgery(HSS) score, Knee Society Score(KSS), Western Ontario and McMaster Universities (WOMAC), and Range of Motion(ROM) were used for clinical evaluation. Mechanical alignment, implant radiological measurements and outliers were analyzed for radiological results. Complication related with surgery was also evaluated. Data were analyzed using SPSS Version 24.0 software and descriptive statistics, paired t‑test, one‑way ANOVA, and Wilcoxon tests. Kaplan-Meier survival analysis was performed for survival rate.Results All clinical assessments including HSS, KSS, WOMAC, and ROM at final follow-up showed excellent improvements in three groups (all, p&lt;0.05), without any significant difference between the groups (p&gt;0.05). In radiologic data, sagittal inclination of femoral implant in robotic group showed better result than another groups with significant difference(p&lt;0.05). The cumulative survival rate was 94.8% in the robotic group, 96.2% in the navigation group, and 92.4% in the conventional TKA group with excellent survival (p=0.563). Complication rate associated surgery was 5.2 % in the robotic group, 5.3% in the navigation group, and 8% in the conventional groupConclusion Our study showed excellent survival with robotic, navigation and conventional TKA and similar clinical outcomes at long-term follow-up. However, in terms of radiological outcome robotic TKA showed accurate position of femoral component. With longer follow-up and larger cohort, the accuracy and effectiveness of robotic TKA on implant survival rate can be elucidated in the future.
Development of individual medical implants with specific mechanical properties manufactured by Laser Powder Bed Fusion
Authors: Willkomm Johannes , Jauer Lucas , Ziegler Stephan , Schleifenbaum Johannes Henrich 
Published: September 2020

Laser Powder Bed Fusion (LPBF) is an additive manufacturing process, which enables the generation of complex geometries such as lattice structures, using metallic powder. Lattice structures are being used increasingly in medical technology to adapt the stiffness of individualized implants which can lead to faster bone healing. Lattice structures are also used to adjust the contact surface between the bone and implant to adapt the osseointegrative behavior. The goal of this work is to create lattice structures with local adaption of the stiffness (modulus of elasticity) for individual vertebral body replacement implants and their automated design based on patient data.To form the lattice structure a diamond cell type is used, which is common in medical technology. For the later adaptation of the bone stiffness, the stiffness of the lattice structure with different strut diameters are determined. The calculation of the stiffness is done by numerical simulations using Finite Element Methods (FEM). The simulations are validated with tensile and compression tests. Finally, the automated design of the implants is carried out with an in-house generated tool to adjust the strut diameters based on the bone density from patient data.Parts of this work have been funded by the German ministry of education and research (BMBF) under grant number 13GW0116.
Virtual pre-operative planning in acetabular surgery using a patient-specific biomechanical model: a prospective clinical study.
Authors: Boudissa Mehdi , Chabanas Matthieu , Bahl Gaetan , Oliveri Hadrien , Tonetti Jérôme 
Published: September 2020

The first patient-specific biomechanical model for pre-operative planning in acetabular surgery was developed in our institution and validated in previous retrospective studies. The aim of this prospective clinical study was to confirm the previous promising.Between January 2019 and June 2019, every patients operated by the first author for acetabular fracture were included in this prospective study. A biomechanical model was implemented in acustom software made from combination of several open-sources software allowing a biomechanical simulation. The surgery was then performed according to the simulation. Surgery duration, blood loss, radiological results and per- operative complications were recorded.Ten patients were included. Mean simulation time was 22 min ± 4 [range, 18-31]. The mean operative time was 113 min ± 33 [range, 60-180] and mean blood loss was 505 mL ± 189 [range, 100-750]. On Matta’s criteria, anatomic reduction was achieved in 9 of the 10 patients (90%; 0.8 mm ± 1 [range, 0-3]). No per-operative complications were recorded.This study confirms the promising results of pre-operative planning in acetabular surgery based on a patient-specific biomechanical model.The model needs larger-scale prospective validation, but offers a new tool suitable for teaching purposes and for assessment of surgical strategies in acetabular fracture.
Automatic muscle elongation measurement during shoulder arthroplasty planning
Authors: Pitocchi Jonathan , Plessers Katrien , Wesseling Mariska , van Lenthe G. Harry , Pérez Maria Angeles 
Published: September 2020

Adequate deltoid and rotator cuff lengthening in total shoulder arthroplasty (TSA) is crucial to maximize the postoperative functional outcome and to avoid complications. Hence surgeons and patients could benefit from including muscle length information in preoperative planning software.Although different methods have been introduced to automatically indicate patient-specific muscle attachment and wrapping points, the definition of a fast and accurate workflow is still a challenge, due to the large variability in bone shapes. Therefore, the goal of this study is to develop and evaluate the accuracy of a novel method to automatically estimate muscle elongation, based on a statistical shape modelling (SSM) approach.Firstly, humerus and scapula SSMs were used to automatically indicate the attachment points of the main shoulder muscles: subscapularis, supraspinatus, infraspinatus, teres minor and deltoid. Secondly, a wrapping algorithm was applied to identify the points where muscles wrap around bones or potential implants. Finally, the accuracy of the automatically indicated landmarks and its effect on the muscle elongation were evaluated by comparing the manually indicated landmarks with the landmarks identified through the SSM for a set of 40 healthy shoulder CT-scans.The low errors on elongation values suggest that the presented automated workflow is a promising tool for allowing surgeons to evaluate patient-specific muscle elongations during preoperative planning. Although the evaluation was limited to healthy joints, this method allows to easily process large datasets and to potentially find a correlation between muscle elongations and postoperative outcome.