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Studies of human movement usually collect data from multiple repetitions of a task and use the average of all movement trials to approximate the typical kinematics or kinetics pattern for each individual. Few studies report the expected accuracy of these estimated mean kinematics or kinetics waveforms for each individual. The purpose of this study is to demonstrate how simultaneous confidence bands, which is an approach to quantify uncertainty across an entire waveform based on limited data, can be used to calculate margin of error (MOE) for waveforms. Bilateral plantar pressure data were collected from 70 participants as they walked over 4 surfaces for an average of at least 300 steps per surface. The relationship between MOE and the number of steps included in the analysis was calculated using simultaneous confidence bands, and 3 methods commonly used for pointwise estimates: intraclass correlation, sequential averaging, and T-based MOE. The conventional pointwise approaches underestimated the number of trials required to estimate biomechanical waveforms within a desired MOE. Simultaneous confidence bands are an objective approach to more accurately estimate the relationship between the number of trials collected and the MOE in estimating typical biomechanical waveforms.
Assuntos
Movimento , Caminhada , Fenômenos Biomecânicos , Humanos , Reprodutibilidade dos TestesRESUMO
Background: Posterior intrusion with skeletal anchorage is one of the effective methods in the treatment of anterior open bite. Knowing the effects of posterior intrusion, the amount of possible molar intrusion using skeletal anchorage, and its impact on clinical and cephalometric indicators can help the clinician choose the optimal treatment method, especially in borderline surgical cases. Methods: In this systematic review, a series of articles were collected through a systematic search in databases, and the titles and summaries of all these articles were reviewed. After removing the irrelevant articles, the full texts of the related articles were read carefully, and their validity was evaluated. Only RCTs and observational studies that complied with PICO questions were included. The Cochrane Risk of Bias 2.0 (RoB 2), ROBINS-I, and GRADE were used to assess the risk of bias in the included studies. The relevant information on selected articles was extracted, and a meta-analysis was performed with Review Manager 5.4 software. Results: The meta-analysis revealed a significant average molar intrusion of 2.89 mm using temporary anchorage devices (TADs). A subgroup analysis showed that miniplates achieved greater intrusion (3.29 mm) compared to miniscrews (2.25 mm) (P=0.03). The level of applied force did not significantly affect the degree of intrusion. Dental parameters such as overbite and overjet were notably altered, with overbite increasing by 4.81 mm and overjet decreasing by 2.06 mm on average. As for the skeletal cephalometric characteristics, SNB, ANB, and SN-Pog increased while mandibular plane angle and lower anterior facial height (LAFH) decreased, and these changes were significant. Meanwhile, SNA and palatal angle changes were not significant. Conclusion: TADs have proved effective in achieving significant intrusion of maxillary molars, leading to marked improvements in dental and skeletal characteristics in patients with open bite malocclusion. Miniplates proved more effective in achieving greater intrusion.
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INTRODUCTION: Concha bullosa is a usual anatomical variation of the nose and paranasal sinuses that can compromise their anatomy and function and cause such symptoms as headache, rhinosinusitis, and nasal congestion. Septal perforation is the defect of the septum that brings nasal cavities in communication and is usually caused by trauma. No septal perforation has been reported due to concha bullosa. CASE REPORT: The case of this report was a 15-year-old female who presented with long-term nasal obstruction due to a huge concha bullosa in her right nasal cavity which perforated nasal septum. She lacked a history of any nasal septum surgery, drug abuse, cocaine, or long-term nasal spray. Endoscopic surgery was performed and our patient's symptoms rapidly diminished after the surgery. Negative results were obtained for tuberculosis, Wegener's granulomatosis disease, and malignancy. CONCLUSION: We believe that the concha bullosa presented in this case might have caused chondrocyte apoptosis due to mechanical pressure and led to septal perforation. Although uncommon, providers should be aware of the possibility of septal perforation in cases with concha bullosa when planning to perform surgery on patients with similar pathology.