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Computational Characterization of the Structure, Energy, Strengths, and Fracture Resistances of Symmetric Tilt Grain Boundaries in Ice.
ACS Appl Mater Interfaces
December 2024
Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50014, United States.
Using an interatomic potential that can capture the tetrahedral configuration of water molecules (HO) in ice without the need to explicitly track the motion of the O and H atoms, coarse-grained (CG) atomistic simulations are performed here to characterize the structures, energy, cohesive strengths, and fracture resistance of the grain boundaries (GBs) in polycrystalline ice resulting from water freezing. Taking the symmetric tilt grain boundaries (STGBs) with a tilting axis of ⟨0001⟩ as an example, several main findings from our simulations are (i) the GB energy, , exhibits a strong dependence on the GB misorientation angle, θ. The classical Read-Shockley model only predicts the - θ relation reasonably well when θ < 20° or θ > 45° but fails when 20° < θ < 45°; (ii) two "valleys" appear in the -θ landscape.
View Article and Find Full Text PDFArticular impactions in acetabular fractures.
Arch Orthop Trauma Surg
December 2024
Department of Orthopaedics and Traumatology, Medical University Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
Impactions of the articular surface are relevant prognostic parameters in the treatment of acetabular fractures. Posterior marginal impactions and acetabular dome impactions may occur depending on the direction of the force vectors during trauma. Posterior marginal impactions are mainly observed in posterior fracture dislocations, while acetabular dome impactions are frequently seen in the elderly with the hip joint in extension during trauma.
View Article and Find Full Text PDFUlnar Nerve Management in Complex Elbow Dislocations: A Retrospective Monocentric Study.
J Pers Med
October 2024
Hand Surgery and Reconstructive Microsurgery Department, CTO Hospital, A.O.U. Città della Salute e della Scienza, 10126 Turin, Italy.
Article Synopsis
- The ulnar nerve is often affected by complex elbow dislocations due to its unique anatomy, leading to variable treatment outcomes and pain among patients.
- A study involving 44 patients revealed that those who had ulnar nerve transposition during surgery experienced more incidents of neuropathy, although their symptoms were less severe but lasted longer compared to those who did not have the procedure.
- The findings suggest that routine transposition of the ulnar nerve may not be necessary in these cases, but further research with larger sample sizes is needed to confirm these conclusions.
Evaluation of an Active Rehabilitation Program With Early Weightbearing and No Immobilization After Tibial Tubercle Distalization.
Orthop J Sports Med
November 2024
Department of Surgery, Tampere University Hospital, Tampere, Finland.
Background: Abnormal patellar height (patella alta) has been reported to be one of the main predisposing factors for recurrent patellar dislocation, and it can be surgically corrected by distalizing tibial tubercle osteotomy (DTTO). Rehabilitation after DTTO often includes limitations on weightbearing and restrictions on knee range of motion by means of bracing, increasing the risk of slow progression of the rehabilitation.
Hypothesis: An active rehabilitation program with no restrictions on weightbearing and range of movement would yield a low risk of postoperative complications and a fast recovery period.
Simultaneous Bilateral Total hip Arthroplasty in Patients With Juvenile Idiopathic Arthritis via Direct Anterior Approach: Long-Term Outcomes.
Arthroplast Today
December 2024
Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran.
Background: Juvenile idiopathic arthritis (JIA) often results in significant bilateral hip damage, necessitating total hip arthroplasty (THA). Simultaneous bilateral THA offers potential advantages, particularly when executed via the Direct Anterior Approach (DAA). This study aims to assess the functional, radiological, and patient-reported outcomes, along with the complications of bilateral uncemented THA performed via DAA in patients with JIA.
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