Educating Teachers and Students through Robotics Courses and Competitions

Igor M,Verner 한국과학기술원 인간친화 복지 로봇 시스템 연구센터 2005 International Journal of Assistive Robotics and Me Vol.6 No.2

This paper presents the teaching methods of the Design and Manufacturing course, in which teachers and students develop various robots and teach robotics to school pupils. The students are involved in the experiential learning process that integrates studying engineering subjects and project guidance methods. The robots developed in the course, the practice of teaching robotics, and the value of participation in the International Robot Olympiad are also presented with analysis.

Simple Fabrication of Polycaprolactone-co-lactide Membrane with Silver Nanowires: Synthesis, Characterization and Cytotoxicity Studies

Zuzana Šimonová,Ludmila Porubová,Adam Verner,Roman Gabor,Zuzana Vilamová,Edmund Dobročka,Miroslav Cieslar,Veronika Krbečková,Kateřina Peterek Dědková,Ladislav Svoboda,Jiří Bednář,Richard Dvorský,Jana 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11

Our simple technique of polymer/metal-based material preparation produces very promising material, and weoutline that this material can be suitable for the potential wound healing multilayered dressing. In our research we focused onthese main issues: (1) the preparation of silver nanowire-like structures using gallic acid (GA); (2) direct silver nanowire-likestructure crystallization of co-polymer L-lactide and ε-caprolactone (PLCL) electrospun fiber and (3) evaluation of thematerial cytotoxicity on the Vero cell line. Synthesized silver nanowire-like width varied from 30 to 100 nm and thehexagonal particles had sizes from 80 to 300 nm. The detected structures were crystalline cubic silver and were similarlysynthesized during both batch synthesis and direct synthesis on the PLCL fibers. The amount of the silver spread within thefibrous membrane was approximately 1.1 wt. % in the sample, moreover, the silver incorporation had no influence on thepolymer structure, which was confirmed by FTIR measurement. The cytotoxicity testing estimated that cell survivalincreased with decreased concentration of GA and silver in the PLCL matrix and the silver-based sample in 50 % MTTextraction concentration maintained required non-cytotoxic properties.

Reliability of panoramic radiography in predicting proximity of third molars to the mandibular canal: A comparison using cone-beam computed tomography

Nunes, Willy James Porto,Vieira, Aline Lisboa,de Abreu Guimaraes, Leticia Drumond,de Alcantara, Carlos Eduardo Pinto,Verner, Francielle Silvestre,de Carvalho, Matheus Furtado Korean Academy of Oral and Maxillofacial Radiology 2021 Imaging Science in Dentistry Vol.51 No.1

Purpose: The purpose of this study was to analyze the reliability of 7 panoramic radiographic signs for predicting proximity of the root apices of mandibular third molars to the mandibular canal using cone-beam computed tomography and to correlate these findings with the Pell and Gregory and the Winter classification systems. Materials and Methods: An observational, cross-sectional, descriptive study was conducted on 74 patients with bilateral impacted mandibular third molars. Four panoramic radiographic signs were observed in the tooth root (darkening, deflection, and narrowing of the root apices, and bifid apices), and another 3 in the mandibular canal (diversion, narrowing, and interruption of the mandibular canal). Cone-beam computed tomography images were analyzed to identify disruption and diversion of the mandibular canal and root deflection. Results: Binary logistic regression showed that only 4 of the 7 panoramic radiographic signs were able to predict proximity of the root apices of the mandibular third molars to the mandibular canal: darkening of the root, deflection of the root, narrowing of the root, and interruption of the mandibular canal(P<0.05). Conclusion: Darkening, deflection, and narrowing of the root, in tandem with the interruption of the mandibular canal on panoramic radiographs, indicate that cone-beam computed tomography should be performed when planning the extraction of impacted mandibular third molars. Proximity between mandibular third molars and the mandibular canal is correlated with the Winter classification.

Dental students’ ability to detect maxillary sinus abnormalities: A comparison between panoramic radiography and cone-beam computed tomography

Lucas de Paula Lopes Rosado,Izabele Sales Barbosa,Sibele Nascimento de Aquino,Rafael Binato Junqueira,Francielle Silvestre Verner 대한영상치의학회 2019 Imaging Science in Dentistry Vol.49 No.3

Purpose: To compare the diagnostic ability of undergraduate dental students to detect maxillary sinus abnormalities in panoramic radiographs (PR) and cone-beam computed tomography (CBCT). Materials and Methods: This was a retrospective study based on the evaluation of PR and CBCT images. A pilot study was conducted to determine the number of students eligible to participate in the study. The images were evaluated by 2 students, and 280 maxillary sinuses were assessed using the following categories: normal, mucosal thickening, sinus polyp, antral pseudocyst, nonspecific opacification, periostitis, antrolith, and antrolith associated with mucosal thickening. The reference standard was established by the consensus of 2 oral radiologists based on the CBCT images. The kappa test, receiver operating characteristic curves, and 1-way analysis of variance with the Tukey-Kramer post-hoc test were employed. Results: Intraobserver and interobserver reliability showed agreement ranging from substantial (0.809) to almost perfect (0.922). The agreement between the students’ evaluations and the reference standard was reasonable (0.258) for PR and substantial (0.692) for CBCT. Comparisons of values of sensitivity, specificity, and accuracy showed that CBCT was significantly better (P<0.05). Conclusion: CBCT was better than PR for the detection of maxillary sinus abnormalities by dental students. However, CBCT should only be requested after a careful analysis of PR by students and more experienced professionals.

Intra-articular calcifications of the temporomandibular joint and associations with degenerative bone alterations

Daniela de Almeida,Patrícia Schmidt Araujo Passos de Souza,Luana Pereira de Mendonça,Francielle Silvestre Verner,Karina Lopes Devito 대한영상치의학회 2020 Imaging Science in Dentistry Vol.50 No.2

Purpose: The purpose of this study was to use cone-beam computed tomography (CBCT) images to determine the prevalence of calcifications in the temporomandibular joint (TMJ) and to evaluate any associations between the presence of such calcifications and degenerative bone alterations of the TMJ, sex, or age. Materials and Methods: In this retrospective study, 1,058 CBCT exams were analyzed, and data regarding the presence and quantity of calcifications, the affected side, any degenerative alterations of the condyle, sex, and age were collected. To evaluate associations between the presence of calcifications and sex or age, the Fisher exact test or the Spearman correlation coefficient, respectively, was used. To assess the association between the presence of calcifications and joint bone alterations, the chi-square and Fisher exact tests were used. The significance level adopted was 5% (P<0.05). Results: Twenty-eight patients (2.7%) presented with TMJ calcifications, including 23 women (82.1%) and 5 men (17.9%). Significant correlations were found between the presence of calcifications and age (P<0.05) and between the presence of calcifications and the presence of condylar alterations (P<0.05), with 73.2% of patients with bone alterations having TMJ calcifications. Conclusion: It may be concluded that, although rare (with a prevalence of only 2.7%), intra-articular calcifications are associated with both degenerative bone alterations and age

Dental students' ability to detect maxillary sinus abnormalities: A comparison between panoramic radiography and cone-beam computed tomography

Rosado, Lucas de Paula Lopes,Barbosa, Izabele Sales,de Aquino, Sibele Nascimento,Junqueira, Rafael Binato,Verner, Francielle Silvestre Korean Academy of Oral and Maxillofacial Radiology 2019 Imaging Science in Dentistry Vol.49 No.3

Purpose: To compare the diagnostic ability of undergraduate dental students to detect maxillary sinus abnormalities in panoramic radiographs(PR) and cone-beam computed tomography (CBCT). Materials and Methods: This was a retrospective study based on the evaluation of PR and CBCT images. A pilot study was conducted to determine the number of students eligible to participate in the study. The images were evaluated by 2 students, and 280 maxillary sinuses were assessed using the following categories: normal, mucosal thickening, sinus polyp, antral pseudocyst, nonspecific opacification, periostitis, antrolith, and antrolith associated with mucosal thickening. The reference standard was established by the consensus of 2 oral radiologists based on the CBCT images. The kappa test, receiver operating characteristic curves, and 1-way analysis of variance with the Tukey-Kramer post-hoc test were employed. Results: Intraobserver and interobserver reliability showed agreement ranging from substantial (0.809) to almost perfect (0.922). The agreement between the students' evaluations and the reference standard was reasonable (0.258) for PR and substantial(0.692) for CBCT. Comparisons of values of sensitivity, specificity, and accuracy showed that CBCT was significantly better(P<0.05). Conclusion: CBCT was better than PR for the detection of maxillary sinus abnormalities by dental students. However, CBCT should only be requested after a careful analysis of PR by students and more experienced professionals.

Intra-articular calcifications of the temporomandibular joint and associations with degenerative bone alterations

de Almeida, Daniela,de Souza, Patricia Schmidt Araujo Passos,de Mendonca, Luana Pereira,Verner, Francielle Silvestre,Devito, Karina Lopes Korean Academy of Oral and Maxillofacial Radiology 2020 Imaging Science in Dentistry Vol.50 No.2

Purpose: The purpose of this study was to use cone-beam computed tomography (CBCT) images to determine the prevalence of calcifications in the temporomandibular joint (TMJ) and to evaluate any associations between the presence of such calcifications and degenerative bone alterations of the TMJ, sex, or age. Materials and Methods: In this retrospective study, 1,058 CBCT exams were analyzed, and data regarding the presence and quantity of calcifications, the affected side, any degenerative alterations of the condyle, sex, and age were collected. To evaluate associations between the presence of calcifications and sex or age, the Fisher exact test or the Spearman correlation coefficient, respectively, was used. To assess the association between the presence of calcifications and joint bone alterations, the chi-square and Fisher exact tests were used. The significance level adopted was 5% (P<0.05). Results: Twenty-eight patients (2.7%) presented with TMJ calcifications, including 23 women (82.1%) and 5 men (17.9%). Significant correlations were found between the presence of calcifications and age (P<0.05) and between the presence of calcifications and the presence of condylar alterations (P<0.05), with 73.2% of patients with bone alterations having TMJ calcifications. Conclusion: It may be concluded that, although rare (with a prevalence of only 2.7%), intra-articular calcifications are associated with both degenerative bone alterations and age.

Reactogenicity to COVID-19 vaccination in the United States of America

Adekunle Sanyaolu,Aleksandra Marinkovic,Stephanie Prakash,Priyank Desai,Nafees Haider,Abu Fahad Abbasi,Nasima Mehraban,Isha Jain,Amarachi Ekeh,Omar Shazley,Chuku Okorie,Verner N. Orish 대한백신학회 2022 Clinical and Experimental Vaccine Research Vol.11 No.1

Purpose: In the United States, Pfizer-BioNTech, Moderna, and Janssen’s coronavirus disease 2019 (COVID-19) vaccines have been granted Emergency Use Authorization (EUA) with the Pfizer-BioNTech vaccine presently approved by the US Food and Drug Administration. The purpose of this study is to analyze passive surveillance data on COVID-19 vaccine adverse reaction in the United States. Materials and Methods: We analyzed passive surveillance data on COVID-19 vaccine adverse reactions which were retrieved from the Vaccine Adverse Event Reporting System database. Retrieved records on demographic information as well as the top 10 common vaccine adverse events were extracted and assessed from 200 of the most recently reported cases for the study analysis. Results: Local and systemic adverse reactions were reported in the study. A significant difference (p<0.05) was recorded for the top 10 systemic reactions by age category (0.041) and by gender (0.002). Analysis of the top five systemic reactions, stratified by vaccine type yielded a significant difference (p<0.05) for chills (p=0.044), and when stratified by age group and type of vaccination received, it yielded a significant difference (p<0.05) for fatigue (p=0.023). Overall, Pfizer had 182 persons (91.0%) reporting adverse events, Moderna with 13 (6.5%), and Janssen with 5 (2.5%). Conclusion: Mild side effects were reported following vaccination with the EUA COVID-19 vaccines in the United States. Thus, continuous monitoring and reporting of all adverse events are recommended to ensure the safety of vaccination

Assessment of infection control in oral radiology during the COVID-19 outbreak: An international collaborative study

Rafaela C Santos,Larissa S Araujo,Rafael B Junqueira,Eliana D Costa,Fernanda M Pigatti,Kivanc Kamburoglu,Pedro HB Carvalho,Manuela LB Oliveira,Sibele N Aquino,Francielle S Verner Korean Academy of Oral and Maxillofacial Radiology 2023 Imaging Science in Dentistry Vol.53 No.-

Purpose: In the context of COVID-19, studies evaluating the adherence of dentists and dental students to infection control are relevant due to their high occupational exposure and risk, as well as their responsibility for disseminating information and good practices. This study evaluated the adherence of dentists and dental students to infection control in the oral radiology field in the setting of the COVID-19 pandemic on different continents. Materials and Methods: This cross-sectional observational study involved individuals who performed intraoral radiographic examinations during the COVID-19 pandemic. The Questionnaire on Infection Control in Oral Radiology was administered virtually using a Google Form. Participants from different continents(the Americas, Africa, Europe, Asia, and Oceania) were recruited. Data were subjected to descriptive analysis and simple and multiple binary regression (5%). Results: There were 582 valid answers, and 68.73% of the participants were from the Americas, 18.90% from Europe, and 12.37% from Asia. The median score for infection control protocols was 94 points for dental students and 104 points for dentists, and participants below the median were considered to have low adherence to infection control in oral radiology. Low access to infection control was found for 53.0% of dentists in the Americas, 34.0% from Europe, and 26.9% from Asia. Conclusion: The adherence to infection control protocols in oral radiology was low even in the face of the COVID-19 pandemic. The results may help improve the awareness of students and professionals, since oral radiology routines have the potential for transmitting COVID-19.