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Alexandra N. De Leo(Alexandra N. De Leo ),Fantine Giap(Fantine Giap ),Matthew M. Culbert(Matthew M. Culbert ),Nicolette Drescher(Nicolette Drescher ),Ryan J. Brisson(Ryan J. Brisson ),Vincent Cassidy( 대한방사선종양학회 2023 Radiation Oncology Journal Vol.41 No.2
Purpose: Patients with cancer are particularly vulnerable to coronavirus disease (COVID). Transportation barriers made travel to obtain medical care more difficult during the pandemic. Whether these factors led to changes in the distance traveled for radiotherapy and the coordinated location of radiation treatment is unknown. Materials and Methods: We analyzed patients across 60 cancer sites in the National Cancer Database from 2018 to 2020. Demographic and clinical variables were analyzed for changes in distance traveled for radiotherapy. We designated the facilities in the 99th percentile or above in terms of the proportion of patients who traveled more than 200 miles as “destination facilities.” We defined “coordinated care” as undergoing radiotherapy at the same facility where the cancer was diagnosed. Results: We evaluated 1,151,954 patients. There was a greater than 1% decrease in the proportion of patients treated in the Mid-Atlantic States. Mean distance traveled from place of residence to radiation treatment decreased from 28.6 to 25.9 miles, and the proportion traveling greater than 50 miles decreased from 7.7% to 7.1%. At “destination facilities,” the proportion traveling more than 200 miles decreased from 29.3% in 2018 to 24% in 2020. In comparison, at the other hospitals, the proportion traveling more than 200 miles decreased from 1.07% to 0.97%. In 2020, residing in a rural area resulted in a lower odds of having coordinated care (multivariable odds ratio = 0.89; 95% confidence interval, 0.83–0.95). Conclusion: The first year of the COVID pandemic measurably impacted the location of U.S. radiation therapy treatment.
Shape factor s<sub>γ</sub> for shallow footings
Puzakov, Viktor,Drescher, Andrew,Michalowski, Radoslaw L. Techno-Press 2009 Geomechanics & engineering Vol.1 No.2
The results of FLAC3D-based numerical evaluation of the bearing capacity shape factor $s_{\gamma}$ are presented for square and rectangular footings on granular soils. The results confirm a peculiar effect found earlier by Zhu and Michalowski (2005), where for large values of internal friction angle, $s_{\gamma}$ exhibits a peak at some aspect ratio of the footing, and then decreases towards unity at large aspect ratios. The Zhu and Michalowski's results were derived using the finite element program ABAQUS, and the results presented in this note corroborate their earlier findings.
ARCO Consensus on the Pathogenesis of Non-traumatic Osteonecrosis of the Femoral Head
Quanjun Cui,Woo-Lam Jo,Kyung-Hoi Koo,Edward Y. Cheng,Wolf Drescher,Stuart B. Goodman,Yong-Chan Ha,Phillippe Hernigou,Lynne C. Jones,Shin-Yoon Kim,Kyu Sang Lee,Mel S. Lee,Yun Jong Lee,Michael A. Mont,N 대한의학회 2021 Journal of Korean medical science Vol.36 No.10
Osteonecrosis of the femoral head (ONFH) is a devastating disease frequently leading to femoral head collapse and hip arthritis. Specifically, non-traumatic ONFH primarily affects young and middle-aged adults. Although compromised local circulation of the femoral head seems to be pathognomonic for the disease, the pathogenesis is perplexing and continues to be an area of scrutiny and research. Comprehension of the pathogenesis is of crucial importance for developing and guiding treatments for the disease. Therefore, we provide an up-to-date consensus on the pathogenesis of non-traumatic ONFH.
Maxillary space closure using a digital manufactured Mesialslider in a single appointment workflow
Wilhelmy Lynn,Willmann Jan H.,Tarraf Nour Eldin,Wilmes Benedict,Drescher Dieter 대한치과교정학회 2022 대한치과교정학회지 Vol.52 No.3
New digital technologies, many involving three-dimensional printing, bring benefits for clinical applications. This article reports on the clinical procedure and fabrication of a skeletally anchored mesialization appliance (Mesialslider) using computer-aided design/computer-aided manufacturing (CAD/CAM) for space closure of a congenitally missing lateral incisor in a 12-year-old female patient. The insertion of the mini-implants and appliance was performed in a single appointment. Bodily movement of the molars was achieved using the Mesialslider. Anchorage loss, such as deviation of the anterior midline or palatal tilting of the anterior teeth, was completely avoided. CAD/CAM facilitates safe and precise insertion of mini-implants. Further, mini-implants can improve patient comfort by reducing the number of office visits and eliminating the need for orthodontic bands and physical impressions.