Objective: To examine the application of a modified fixed reverse twin-block appliance (TBA) in adults with an Angle Class III malocclusion and anterior crossbite.
Participants: Thirty-two adults with an Angle III malocclusion were recruited. An associated temporomandibular disorder (TMD) was found in 18 patients, laterognathism in 21, and both conditions in the remaining 12 patients.
Methods: A modified fixed reverse TBA was used to posture the mandible back, divert bite force and centre the dentition. The malocclusion, laterognathism and temporomandibular disorders were concurrently treated. The outcome was evaluated radiographically and the findings were analyzed via Electronic Measurement Scale software.
Results: Treatment was shown to be effective and could significantly shorten the course of treatment and avoid orthognathic surgery. The average course of treatment was 14 months, during which time, the mandible was postured back and the dentition was successfully aligned and levelled. Most patients achieved an edge-to-edge occlusion of the anterior teeth after 7-10 days of appliance wear. Most symptoms of TMD were relieved after 1 month and the laterognathism resolved in 4-5 months.
Conclusion: A modified fixed reverse TBA was an effective non-surgical strategy for the treatment of selected Angle Class III malocclusions with an anterior crossbite in adults.
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Nat Commun
January 2025
School of Physics and Astronomy, University of Nottingham, Nottingham, UK.
Ferroelectrics based on van der Waals semiconductors represent an emergent class of materials for disruptive technologies ranging from neuromorphic computing to low-power electronics. However, many theoretical predictions of their electronic properties have yet to be confirmed experimentally and exploited. Here, we use nanoscale angle-resolved photoemission electron spectroscopy and optical transmission in high magnetic fields to reveal the electronic band structure of the van der Waals ferroelectric indium selenide (α-InSe).
View Article and Find Full Text PDFSci Adv
January 2025
National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
Revealing the momentum-resolved electronic structure of infinite-layer nickelates is essential for understanding this class of unconventional superconductors but has been hindered by the formidable challenges in improving the sample quality. In this work, we report the angle-resolved photoemission spectroscopy of superconducting LaSrNiO films prepared by molecular beam epitaxy and in situ atomic-hydrogen reduction. The measured Fermi topology closely matches theoretical calculations, showing a large Ni [Formula: see text]-derived Fermi sheet that evolves from hole-like to electron-like along and a three-dimensional (3D) electron pocket centered at the Brillouin zone corner.
View Article and Find Full Text PDFClin Oral Investig
January 2025
College of Stomatology, Dalian University, Dalian, Liaoning, 116622, China.
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Hua Xi Kou Qiang Yi Xue Za Zhi
February 2025
School of Stomatology, Shandong Second Medical University, Weifang 261053, China.
Objectives: The objective of this study is to measuring the morphology and position of bilateral temporomandibular joints in patients with unilateral and bilateral molar scissor bite and simulating the deformation of the mandible during occlusion, in order to provide thesis for the diagnosis of temporomandibular joint disease in patients with unilateral and bilateral molar scissor bite.
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Hua Xi Kou Qiang Yi Xue Za Zhi
February 2025
Stomatological College of Nanjing Medical University, Nanjing 210029, China.
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