Publications by authors named "Krey K"

Objective: Research is lacking examining the effect of malocclusion on tooth loss. The aim of this study was to analyze the possible impact of moderate and severe malocclusions on tooth loss over the course of twenty years.

Material And Methods: Of 1269 subjects aged between 25 and 49 years with at least 20 teeth of the population-based Study of Health in Pomerania in Germany, malocclusions were initially assessed according to a German orthodontic index of treatment priority between 1997 and 2001.

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Background: The external auditory canal (EAC) exhibits a complex morphology and strong inter-individual variations. However, these have not yet been comprehensively described in the literature.

Purpose: This study aims to determine the width, height and cross-sectional area of the cartilaginous portion of the EAC and to describe the three-dimensional morphology and variability of different EACs.

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Background: Rural U.S. residents experience a disproportionate burden of diet and physical activity (PA) related chronic disease compared to urban residents, due to resource and economic challenges.

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Multiple omics analyzes of Vaccinia virus (VACV) infection have defined molecular characteristics of poxvirus biology. However, little is known about the monkeypox (mpox) virus (MPXV) in humans, which has a different disease manifestation despite its high sequence similarity to VACV. Here, we perform an in-depth multi-omics analysis of the transcriptome, proteome, and phosphoproteome signatures of MPXV-infected primary human fibroblasts to gain insights into the virus-host interplay.

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Objectives: Orofacial clefts are complex congenital anomalies that call for comprehensive treatment based on a thorough assessment of the anatomy. This study aims to examine the effect of cleft type on craniofacial morphology using geometric morphometrics.

Materials And Methods: We evaluated lateral cephalograms of 75 patients with bilateral cleft lip and palate, 63 patients with unilateral cleft lip and palate, and 76 patients with isolated cleft palate.

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Over the past 50 years, digitization has gradually taken root in dentistry, starting with computer tomography in the 1970s. The most disruptive events in digital dentistry were the introduction of digital workflow and computer-aided manufacturing, which made new procedures and materials available for dental use. While the conventional lab-based workflow requires light or chemical curing under inconsistent and suboptimal conditions, computer-aided manufacturing allows for industrial-grade material, ensuring consistently high material quality.

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Background: The fundamental part of every successful orthodontic treatment is the detailed treatment planning including a precise determination of the virtual treatment objective (VTO) while considering the biological and anatomical limits. The aim of this study is to investigate and to compare the feasibility of the established reference values before and after orthodontic treatment and to determine the usefulness of this parameters as guidance for the sagittal anterior, sagittal posterior and transverse biological boundaries.

Materials And Methods: Thirty-two patients aged 9 to 18 years (12 male and 20 female) with all permanent teeth present were randomly selected for orthodontic treatment with fixed multibracket appliance regardless of the potential malocclusion.

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Like all herpesviruses, cytomegaloviruses (CMVs) code for many immunomodulatory proteins including chemokines. The human cytomegalovirus (HCMV) CC chemokine pUL128 has a dual role in the infection cycle. On one hand, it forms the pentameric receptor-binding complex gHgLpUL(128,130,131A), which is crucial for the broad cell tropism of HCMV.

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Regulation of viral RNA biogenesis is fundamental to productive SARS-CoV-2 infection. To characterize host RNA-binding proteins (RBPs) involved in this process, we biochemically identified proteins bound to genomic and subgenomic SARS-CoV-2 RNAs. We find that the host protein SND1 binds the 5' end of negative-sense viral RNA and is required for SARS-CoV-2 RNA synthesis.

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Spermatogenesis is a crucial biological process that enables the production of functional sperm, allowing for successful reproduction. Proper germ cell differentiation and maturation require tight regulation of hormonal signals, cellular signaling pathways, and cell biological processes. The acrosome is a lysosome-related organelle at the anterior of the sperm head that contains enzymes and receptors essential for egg-sperm recognition and fusion.

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Angiotensin-converting enzyme 2 (ACE2) is the central entry receptor for SARS-CoV-2. However, surprisingly little is known about the effects of host regulators on ACE2 localization, expression, and the associated influence on SARS-CoV-2 infection. Here we identify that ACE2 expression levels are regulated by the E3 ligase MDM2 and that MDM2 levels indirectly influence infection with SARS-CoV-2.

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Purpose: Cold atmospheric plasma can functionalize enamel without damaging the substrate morphology. It therefore has the potential to be a gentle alternative to conventional acid etching. To realize the full potential of cold atmospheric plasma in orthodontic bonding, the input parameters and protocols that are most beneficial to surface modification must first be identified.

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Objectives: To investigate the effect of layer height of FFF-printed models on aligner force transmission to a second maxillary premolar during buccal torquing, distalization, extrusion, and rotation using differing foil thicknesses.

Materials And Methods: Utilizing OnyxCeph™ Lab (Image Instruments GmbH, Chemnitz, Germany, Release Version 3.2.

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Aim: Orthodontic treatments with custom-made active elements may lead to more efficient treatment with fewer side effects. The objective of the present in vitro study was to determine whether individually constructed, mathematically simulated, and 3D-printed power chains could generate adequate forces for orthodontic tooth movement.

Materials And Methods: An individual measurement device was developed using a high-precision load cell, amplifier, and microcontroller for signal processing.

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Article Synopsis
  • The SARS-CoV-2 infection cycle involves complex interactions between the virus and the host, which can be disrupted using targeted antiviral drugs.
  • Researchers repurposed existing antiviral medications to inhibit key enzymes necessary for the virus’s replication, especially focusing on the methylation of the viral RNA cap.
  • A promising bispecific inhibitor was identified that targets vital enzymes, alongside another compound named DZNep, which shows antiviral effects and potential to reduce harmful inflammation in COVID-19 cases.
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Background: The closure of schools in response to COVID-19 compromised access to essential meals for many students. The Emergency Meals-to-You program, a public/private partnership, was set up to address this challenge. More than 38.

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Article Synopsis
  • Generalist predators can disrupt biological control by preying on other natural enemies, but their behavior may change based on prey availability.
  • Higher densities of herbivores like aphids and thrips lead to more frequent encounters with intraguild predation, indicating that predator interactions are influenced by prey abundance.
  • As predator competition increases, Geocoris may switch to feeding on detritivores, highlighting how prey diversity can alter predator interactions and foraging strategies.
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Article Synopsis
  • The Study of Health in Pomerania (SHIP) incorporated whole-body MRI in 2008 to improve their health examination efforts in northeastern Germany, which has low life expectancy.
  • Over 100 publications were assessed, revealing that T1-weighted brain imaging and gradient-echo sequences for R2* mapping yielded the most scientific contributions, with a majority focusing on the brain and upper abdomen.
  • The study suggests that imaging in cohort studies should have clearer objectives, implement regular quality control of publication outcomes, and consider structured educational courses for underrepresented research areas.
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Insects harbor bacterial endosymbionts that provide their hosts with nutritional benefit or with protection against natural enemies, plant defenses, insecticides, or abiotic stresses. We used directed sequencing of 16S rDNA to identify and compare endosymbionts of Bactericera maculipennis (Crawford) and the western, central, and northwestern haplotypes of B. cockerelli (Šulc) (Hemiptera: Psylloidea: Triozidae).

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While viral replication processes are largely understood, comparably little is known on cellular mechanisms degrading viral RNA. Some viral RNAs bear a 5'-triphosphate (PPP-) group that impairs degradation by the canonical 5'-3' degradation pathway. Here we show that the Nudix hydrolase 2 (NUDT2) trims viral PPP-RNA into monophosphorylated (P)-RNA, which serves as a substrate for the 5'-3' exonuclease XRN1.

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The magnitude of forces and moments applied on teeth during orthodontic treatment is crucial to achieve the desired tooth movement. The aim of this study is to introduce a modular 3D printable orthodontic measurement apparatus (M3DOMA), which can be used for measurements of forces and moments acting on teeth during treatment with aligners. The measurement device was characterized regarding signal to noise ratio (SNR) of the sensors, repeatability of measurements, influence of thermoforming, as well as reliability.

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Aim: The present prospective clinical study aimed to validate the Greifswald Digital Analyzing System (GEDAS) as a method for digital assessment of the occlusion in primary and mixed dentition.

Materials And Methods: The reproducibility of GEDAS in primary and mixed dentition was assessed using the intraclass correlation coefficient (ICC). In addition, the acceptability of the method to the dentist, the child, and the parent/caregiver was assessed using a modified visual analog scale of faces, the Frankl behavior scale, and the 10-point Likert scale.

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The aim of this study was to examine the interaction between the oculomotory system and the stomatognathic system based on morphofunctional relationships between the corresponding cranial nerves, their core areas and the reticular formation as a "link" by means of optometric examinations. Test subjects (N = 100) were prospectively recruited and divided into two groups: a young-age (N = 53, age 6-16 years) and old-age group (N = 47, 23-78 years). We determined the horizontal range of convergence and divergence as well as the near convergence point.

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Article Synopsis
  • The study examined how different prey populations affect the ability of generalist predators, specifically Nabis sp. and Geocoris sp., to control the Colorado potato beetle in organic versus conventional potato fields.
  • In organic fields, higher biodiversity led to decreased predation of the beetles by Nabis, suggesting these predators switched to more abundant alternative prey; in contrast, predation increased with arthropod richness in conventional fields.
  • Geocoris predation was more effective in organic fields but decreased when alternative prey like detritus-feeding flies were abundant, indicating that the presence of other prey can significantly disrupt beetle feeding.
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