Is scanning under rubber dam isolation a feasible approach for the execution of indirect restorations? / O escaneamento sob isolamento absoluto é uma técnica viável para execução de restaurações indiretas?

Objective: The aim of the study was to report the aplicability of intraoral scanning while rubber dam isolation is in place. Material and Methods: Female patient, 50 years old, required restorative procedures on teeth 35 and 37. An intraoral scan was initially performed on both arches. Isolation was carried out from 33 to 37, tooth preparation and immediate dentin sealing were carried out. A new scan with the rubber dam in place was performed and a CAD/CAM lithium disilicate hybrid block was digitally designed, milled, crystallized and cemented under the tooth surface with the rubber dam still in position. After completing this stage, the rubber dam was removed, the occlusion was verified, presenting excellent aesthetic and functional results. Results: The absolute isolation process used in the present study works as an excellent device for gingival retraction. Conclusion: The absolute isolation can be recommended in clinical activities of intraoral scanning favoring the quality of the final result of treatments (AU)

Objetivo: O objetivo do estudo foi relatar a aplicabilidade do escaneamento intraoral sob isolamento absoluto. Material e Métodos: Paciente do sexo feminino, 50 anos, necessitou de procedimentos restauradores nos dentes 35 e 37. Uma varredura intraoral foi inicialmente realizada em ambos os arcos. O isolamento absoluto foi feito de 33 a 37, permitindo a realização do preparo dentário e selamento imediato da dentina. Um novo escaneamento com o dique de borracha colocado foi realizado e um bloco híbrido de dissilicato de lítio CAD/CAM foi projetado digitalmente, fresado, cristalizado e cimentado sob a superfície dentária ainda com o dique de borracha em posição. Após a finalização dessa etapa, o dique de borracha foi removido, a oclusão foi verificada apresentando ótimos resultados estéticos e funcionais. Resultados: O isolamento absoluto utilizado no presente estudo funciona como um excelente dispositivo para retração gengival. Conclusão: O isolamento absoluto pode ser recomendado em atividades clínicas de escaneamento intraoral favorecendo a qualidade do resultado final dos tratamentos (AU)

Evaluation the scanning accuracy of Blue-Light laboratory scanners in complete edentulous Maxilla with multiple implants with titanium scan bodies / Evaluación de la precisión de escaneado de los escáneres de laboratorio de luz azul en maxilares desdentados completos con implantes múltiples con cuerpos de escaneado de titanio

Abstract To evaluate the accuracy of complete arch scanning with multiple implant titanium scan bodies using laboratory scanners. A master model of an edentulous maxillary arch with 6 implants was fabricated. Titanium scan bodies were inserted into the model. Three laboratory scanners were used: D2000 (3Shape), Vinyl High Resolution (Smart Optics), and inEos X5 (Dentsply Sirona). The master model was consecutively scanned ten times using dental laboratory scanners (LS) without detaching and repositioning the scan bodies. Linear and angular accuracy between adjacent implants was measured using inspection software (Control X, Geomagic). The accuracy of the complete arch scans was calculated. Implant regions were defined as; parallel (R1: #24-26 and #16-14), angled (R2: #22-24 and #14-12), angled to occlusal plane (R3: #12-22), and cross-arch (R4: #16-26). The effect of LS and implant region on accuracy was compared using two-Way ANOVA (α=0.05). Significant greater linear distortion was noted in R4 (61.2±17.9µm) compared to R1 (23.4±15.5µm) and R2 (26±17.7µm) (p<0.01). Greater linear distortions were noted in R4 with D2000 (0.07±0.016 degrees) and Vinyl High Resolution (0.067±0.02 degrees) than inEos X5 (0.032±0.021 degrees) (p>0.05). Greater mean linear precisions were noted in R1 (9±8µm) and R3 (9.3±8.3µm) than R4 (12.6±10.3µm) (p<0.05). The highest linear precision was noted in D2000 (7.2±7.6µm) (p<0.05). The angular precision of D2000 (0.02±0.015 degrees) was the highest (p<0.01). The angular precisión of R4 (0.036±0.018 degrees) was the lowest (p<0.01). This study revealed that the trueness was affected by the implant region and the precision was affected by both LS and implant region.

Resumen Evaluar la precisión del escaneado de la arcada completa con cuerpos de escaneado de titanio de múltiples implantes utilizando escáneres de laboratorio. Se fabricó un modelo maestro de una arcada maxilar edéntula con 6 implantes. Se insertaron cuerpos de escaneo de titanio en el modelo. Se utilizaron tres escáneres de laboratorio: D2000 (3Shape), Vinyl High Resolution (Smart Optics) e inEos X5 (Dentsply Sirona). El modelo maestro se escaneó consecutivamente diez veces usando escáneres de laboratorio dental (LS) sin separar y reposicionar los cuerpos de escaneo. La precisión lineal y angular entre implantes adyacentes se midió utilizando un software de inspección (Control X, Geomagic). Se calculó la precisión de los escaneos completos del arco. Las regiones del implante se definieron como; paralelo (R1: #24-26 y #16-14), angulado (R2: #22-24 y #14-12), angulado al plano oclusal (R3: #12-22) y cruzado (R4: #16-26). El efecto de LS y la región del implante en la precisión se comparó mediante ANOVA de dos vías (α=0,05). Se observó una distorsión lineal significativamente mayor en R4 (61,2±17,9µm) en comparación con R1 (23,4±15,5µm) y R2 (26 ±17,7µm) (p<0,01). Se observaron mayores distorsiones lineales en R4 con D2000 (0,07±0,016 grados) y vinilo de alta resolución (0,067±0,02 grados) que en inEos X5 (0,032±0,021 grados) (p>0,05). Se observaron precisiones lineales medias mayores en R1 (9±8µm) y R3 (9,3±8,3µm) que en R4 (12,6±10,3µm) (p<0,05). La mayor precisión lineal se observó en D2000 (7,2±7,6 µm) (p<0,05). La precisión angular de D2000 (0,02±0,015 grados) fue la más alta (p<0,01). La precisión angular de R4 (0,036±0,018 grados) fue la más baja (p<0,01). Este estudio reveló que la veracidad se vio afectada por la región del implante y la precisión se vio afectada tanto por LS como por la región del implante.

Age and growth assessment of the near-threatened fish Rita rita (Siluriformes: Bagridae) in the Ganges basin

Introduction: Rita rita is a freshwater catfish under threat of extinction, mainly from loss of breeding and nursing grounds. A reliable method for age and growth estimation is needed by fishery managers. Objective: To identify the best body structure for age and growth estimation. Methods: We assessed estimates precision based on Average Percent Error (APE), Coefficient Variation (CV), and Percent Agreement (PA) between readers separately analyzed each calcified structure. We used 390 fish samples from three rivers, Ganga, Yamuna and Ramganga, from September 2018 to August 2019. Results: The three indicators favored the use of vertebrae for age estimation; the growth band seems to be annual and formed from May to September. The growth equations were Lt = 90.19(1-e-0.145(t+0.51)) for Ganga; Lt = 91.19 (1-e-0.14(t+0.59)) for Yamuna and Lt = 89.63 (1-e-0.15(t+0.68)) for Ramganga. Conclusion: This species reaches moderate growth in these rivers, where vertebrae are the recommended age estimation structure, followed, in case of need, by sectioned otoliths, whole otoliths and opercular bones. Pectoral spines should be avoided, especially in older fish.

Introducción: Rita rita es un pez de agua dulce bajo amenaza de extinción, principalmente por la pérdida de sitios de reproducción y crianza. Un método fiable para las estimaciones de edad y crecimiento es necesario para los administradores de recursos pesqueros. Objetivo: Identificar la mejor estructura corporal para estimaciones de edad y crecimiento. Métodos: Evaluamos la precisión de las estimaciones mediante el Porcentaje de Error Promedio (APE), Coeficiente de Variación (CV), y Porcentaje de Acuerdo (PA) entre lecturas para cada estructura calcificada. Usamos 390 muestras de peces de tres ríos, Ganga, Yamuna y Ramganga, de setiembre 2018 hasta agosto 2019. Resultados: Los tres indicadores favorecieron el uso de vértebras para la estimación de edad; la banda de crecimiento parece ser anual y se forma entre mayo y setiembre. Las ecuaciones de crecimiento fueron Lt = 90.19(1-e-0.145(t+0.51)) para Ganga; Lt = 91.19 (1-e-0.14(t+0.59)) para Yamuna y Lt = 89.63 (1-e-0.15(t+0.68)) para Ramganga. Conclusión: La especie alcanza un crecimiento moderado en estos ríos, dónde las vértebras son la estructura de estimación etaria recomendada, seguido de, en caso de ser necesario, los otolitos segmentados, otolitos enteros y huesos operculares. Debe evitarse el uso de espinas pectorales, especialmente en peces de mayor edad.

Advances in diffuse glial tumors diagnosis / Avanços no diagnóstico dos gliomas difusos

Abstract In recent decades, there have been significant advances in the diagnosis of diffuse gliomas, driven by the integration of novel technologies. These advancements have deepened our understanding of tumor oncogenesis, enabling a more refined stratification of the biological behavior of these neoplasms. This progress culminated in the fifth edition of the WHO classification of central nervous system (CNS) tumors in 2021. This comprehensive review article aims to elucidate these advances within a multidisciplinary framework, contextualized within the backdrop of the new classification. This article will explore morphologic pathology and molecular/genetics techniques (immunohistochemistry, genetic sequencing, and methylation profiling), which are pivotal in diagnosis, besides the correlation of structural neuroimaging radiophenotypes to pathology and genetics. It briefly reviews the usefulness of tractography and functional neuroimaging in surgical planning. Additionally, the article addresses the value of other functional imaging techniques such as perfusion MRI, spectroscopy, and nuclear medicine in distinguishing tumor progression from treatment-related changes. Furthermore, it discusses the advantages of evolving diagnostic techniques in classifying these tumors, as well as their limitations in terms of availability and utilization. Moreover, the expanding domains of data processing, artificial intelligence, radiomics, and radiogenomics hold great promise and may soon exert a substantial influence on glioma diagnosis. These innovative technologies have the potential to revolutionize our approach to these tumors. Ultimately, this review underscores the fundamental importance of multidisciplinary collaboration in employing recent diagnostic advancements, thereby hoping to translate them into improved quality of life and extended survival for glioma patients.

Resumo Nas últimas décadas, houve avanços significativos no diagnóstico de gliomas difusos, impulsionados pela integração de novas tecnologias. Esses avanços aprofundaram nossa compreensão da oncogênese tumoral, permitindo uma estratificação mais refinada do comportamento biológico dessas neoplasias. Esse progresso culminou na quinta edição da classificação da OMS de tumores do sistema nervoso central (SNC) em 2021. Esta revisão abrangente tem como objetivo elucidar esses avanços de forma multidisciplinar, no contexto da nova classificação. Este artigo irá explorar a patologia morfológica e as técnicas moleculares/genéticas (imuno-histoquímica, sequenciamento genético e perfil de metilação), que são fundamentais no diagnóstico, além da correlação dos radiofenótipos da neuroimagem estrutural com a patologia e a genética. Aborda sucintamente a utilidade da tractografia e da neuroimagem funcional no planejamento cirúrgico. Destacaremos o valor de outras técnicas de imagem funcional, como ressonância magnética de perfusão, espectroscopia e medicina nuclear, na distinção entre a progressão do tumor e as alterações relacionadas ao tratamento. Discutiremos as vantagens das diferentes técnicas de diagnóstico na classificação desses tumores, bem como suas limitações em termos de disponibilidade e utilização. Além disso, os crescentes avanços no processamento de dados, inteligência artificial, radiômica e radiogenômica têm grande potencial e podem em breve exercer uma influência substancial no diagnóstico de gliomas. Essas tecnologias inovadoras têm o potencial de revolucionar nossa abordagem a esses tumores. Em última análise, esta revisão destaca a importância fundamental da colaboração multidisciplinar na utilização dos recentes avanços diagnósticos, com a esperança de traduzi-los em uma melhor qualidade de vida e uma maior sobrevida.

Reshaping neuroimmunology: diagnosis and treatment in the era of precision medicine / Remodelando a neuroimunologia: diagnóstico e tratamento na era da medicina de precisão

Abstract Precision medicine has revolutionized the field of neuroimmunology, with innovative approaches that characterize diseases based on their biology, deeper understanding of the factors leading to heterogeneity within the same disease, development of targeted therapies, and strategies to tailor therapies to each patient. This review explores the impact of precision medicine on various neuroimmunological conditions, including multiple sclerosis (MS), neuromyelitis optica spectrum disorder (NMOSD), myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD), optic neuritis, autoimmune encephalitis, and immune-mediated neuropathies. We discuss advances in disease subtyping, recognition of novel entities, promising biomarkers, and the development of more selective monoclonal antibodies and cutting-edge synthetic cell-based immunotherapies in neuroimmunological disorders. In addition, we analyze the challenges related to affordability and equity in the implementation of these emerging technologies, especially in situations with limited resources.

Resumo A medicina de precisão está revolucionando o campo da neuroimunologia, com uma abordagem inovadora caracterizada pela classificação de doenças com base em sua biologia, compreensão mais profunda dos fatores que levam à heterogeneidade dentro da mesma doença, desenvolvimento de terapias com alvos específicos e estratégias para adaptar as terapias a cada paciente. Esta revisão explora o impacto da medicina de precisão em várias condições neuroimunológicas, incluindo esclerose múltipla (EM), distúrbio do espectro da neuromielite óptica (NMOSD), doença associada ao anticorpo anti-glicoproteína da mielina do oligodendrócito (MOGAD), neurites ópticas, encefalites autoimunes e neuropatias imunomediadas. Discutimos avanços na subclassificação de doenças, reconhecimento de novas entidades, biomarcadores promissores e desenvolvimento de anticorpos monoclonais mais seletivos e imunoterapias de ponta baseadas em células sintéticas para as condições acima. Além disso, analisamos os desafios relacionados com acessibilidade e equidade na implementação dessas tecnologias emergentes, especialmente em ambientes com recursos limitados.

ChatGPT: oportunidades y riesgos en la asistencia, docencia e investigación médica / ChatGPT: opportunities and risks in the fields of medical care, teaching, and research

Resumen ChatGPT es un asistente virtual con inteligencia artificial que utiliza lenguaje natural para comunicarse, es decir, mantiene conversaciones como las que se tendrían con otro humano. Puede aplicarse en educación a todos los niveles, que incluye la educación médica, tanto para la formación, la investigación, la escritura de artículos científicos, la atención clínica y la medicina personalizada. Puede modificar la interacción entre médicos y pacientes para mejorar los estándares de calidad de la atención médica y la seguridad, por ejemplo, al sugerir medidas preventivas en un paciente que en ocasiones no son consideradas por el médico por múltiples causas. Los usos potenciales del ChatGPT en la educación médica, como una herramienta de ayuda en la redacción de artículos científicos, un asistente en la atención para pacientes y médicos para una práctica más personalizada, son algunas de las aplicaciones que se analizan en este artículo. Los aspectos éticos, originalidad, contenido inapropiado o incorrecto, citas incorrectas, ciberseguridad, alucinaciones y plagio son ejemplos de las situaciones a tomar en cuenta al usar las herramientas basadas en inteligencia artificial en medicina.

Abstract ChatGPT is a virtual assistant with artificial intelligence (AI) that uses natural language to communicate, i.e., it holds conversations as those that would take place with another human being. It can be applied at all educational levels, including medical education, where it can impact medical training, research, the writing of scientific articles, clinical care, and personalized medicine. It can modify interactions between physicians and patients and thus improve the standards of healthcare quality and safety, for example, by suggesting preventive measures in a patient that sometimes are not considered by the physician for multiple reasons. ChatGPT potential uses in medical education, as a tool to support the writing of scientific articles, as a medical care assistant for patients and doctors for a more personalized medical approach, are some of the applications discussed in this article. Ethical aspects, originality, inappropriate or incorrect content, incorrect citations, cybersecurity, hallucinations, and plagiarism are some examples of situations to be considered when using AI-based tools in medicine.

La genética de la epilepsia en la práctica clínica / The genetics of epilepsy in the clinical practice

Resumen La epilepsia es un trastorno neurológico caracterizado por crisis epilépticas recurrentes no provocadas, en el cual la genética tiene un factor etiológico importante. Durante las últimas décadas se ha logrado encontrar genes específicos involucrados en la patogénesis de esta condición. Actualmente existen múltiples exámenes disponibles en la práctica clínica para el diagnóstico genético, siendo los más útiles los paneles multi-genes y la secuenciación del exoma completo por medio de next generation sequencing (NGS). El tener un diagnósti co genético puede mejorar la calidad de vida de cada paciente y su familia, al mismo tiempo que nos ayuda a individualizar el tratamiento haciéndolo más eficaz. Algunos ejemplos en los que el diagnóstico genético puede modificar la conducta terapéutica incluyen el gen SCN1A en que se recomienda no utilizar medicamentos bloqueadores de canales de sodio y el gen SLC2A1 en el que se recomienda el inicio de la dieta cetogénica. El futuro de la investigación en medicina de precisión en epilepsia es muy prometedor, con el objetivo de que cada paciente reciba un tratamiento acorde a su etio logía genética.

Abstract Epilepsy is a neurological disorder characterized by recurrent unprovoked seizures. It is known that genetics play an important etiology roll. During the last decades it has been possible to find specific genes involved in the pathogenesis of this condition. There are currently multiple studies available in clinical practice for genetic diagnosis, the most useful being the next generation se quencing (NGS) techniques with multi-gene panels and whole exome sequencing. Having a genetic diagnosis can help improve the quality of life of each patient and their family, while it helps us to individualize the treatment, making it more effective. Some examples in which ge netic diagnosis can modify therapeutic conduct include the SCN1A gene, in which it is recommended not to use drugs that block Sodium channels, and the SLC2A1 gene, in which starting ketogenic diet is recommended. The future of precision medicine research in epilepsy is very promising, with the goal that each patient receives treatment according to their genetic etiology.

Validación de un modelo para la estimación del contenido de agua del suelo mediante espectroscopía en el infrarrojo cercano

El monitoreo del contenido de humedad en el suelo es especialmente importante, ya que proporciona información relevante para tomar decisiones acertadas, en cuanto a riego, fertirriego y manejo del estrés hídrico. Este trabajo tiene como objetivo validar un modelo de estimación del contenido de agua en el suelo, mediante espectroscopía de reflectancia difusa en el rango del infrarrojo cercano. Los suelos evaluados provienen de los municipios de Puerto Gaitán (Meta), Espinal (Tolima) y Mosquera (Cundinamarca). En los dos primeros se establecieron redes rígidas, para seleccionar los puntos de muestreo y empleando dos profundidades en cada caso (0-10 y 10-30; 0-10 y 10-25 cm, respectivamente). Para el tercero, se describieron 77 calicatas y se tomaron muestras a 0-10 y 10-35 cm de profundidad. Posteriormente, se evaluó el contenido de humedad considerando 0, 15 y 30 % de humedad. Los datos obtenidos se analizaron con estadística descriptiva. Se empleó la validación cruzada y externa para cada modelo y se obtuvo un modelo general, a partir de los datos de los tres sitios. Los modelos obtenidos para cada sitio de muestreo y el modelo general tienen buena capacidad predictiva. Según los resultados, se afirma que la espectroscopía de reflectancia difusa NIR es una excelente opción para determinar el contenido de agua en el suelo. De igual manera, a partir del análisis de componentes principales, se identificó una diferenciación entre contenidos de agua de los suelos estudiados.

Monitoring soil moisture content is especially important as it provides relevant information for making informed decisions regarding irrigation, fertigation, and water stress management. This study aims to validate a model for estimating soil water content using diffuse reflectance spectroscopy in the near-infrared range. The evaluated soils come from the municipalities of Puerto Gaitán (Meta), Espinal (Tolima), and Mosquera (Cundinamarca). In the first two municipalities, rigid networks were established to select sampling points, with two depths considered for each case (0-10 and 10-30 cm; 0-10 and 10-25 cm, respectively). For the third municipality, 77 soil pits were described, and samples were taken at depths of 0-10 and 10-35 cm. Subsequently, moisture content was evaluated at 0, 15, and 30 % moisture levels. The obtained data were analyzed using descriptive statistics. Cross-validation and external validation were applied to each model, and a general model was developed based on the data from all three sites. The obtained models for each sampling site and the general model demonstrated good predictive capacity. Based on the results, it is affirmed that near-infrared diffuse reflectance spectroscopy is an excellent option for determining soil water content. Similarly, principal component analysis identified differentiation between water contents of the studied soils.

Effect of Soil and Climatic Conditions on Brown Spot Occurrence in Rice Lowland across Four Agro-climatic Zones of Côte d’Ivoire

Aims: To evaluate interaction of soil pH and acidity with weather on Rice Brown spot (BS) occurrence in rice lowlands. Study Design: Cross sectional study. Place and Duration of Study: Four distinct rice lowlands belonging to different climatic zones (forest, transitional and savanna) of Côte d’Ivoire during cropping seasons of 2021. Methodology: BS characterization were done in different farmer fields where soil samples were also collected during dry and rainy seasons. Soil silicon and acidity were determined in those samples and rice grain yield at harvest time were recorded in different sites. Weather data related to sites and seasons were used to find out correlations. Results: Occurrence of BS was found in forest zones with scores of 4 and 3 compared to 1 and 2 in savanna and transitional zones, respectively, with seasonal variation. Both rice production and the occurrence of BS were explained by soil parameters in conjunction with climatic parameters. Rainfall (R=0.38) and relative humidity (R=0.64) leaded BS occurrence and decrease of yield. Wind speed (R=0.62) and air maximum temperature (R= 0.63) were the determinant factors affecting rice yields. Si was found to be a component of sustainable soil management that interferes with soil pH in all climatic zones. Combined with Temperature, both soil parameters predicted BS occurrence over 50%. Conclusion: Temperature decrease BS pathogens occurrence whereas high humidity increases its spread. Those parameters combined with silicon which interferes with pH could leads sustainable solutions in BS control. Furthermore, having a deep understanding with rice varietal considerations can significantly improve strategies related to rice cultivation and protection.

Fenótipos digitais para mindfulness e ansiedade encontrados por aplicativo de smartphone / Digital phenotypes for mindfulness and anxiety found by smartphone APP

A pesquisa em telemedicina possibilitou a captação de medidas fisiológicas para encontrar biomarcadores do comportamento humano durante o uso de smartphones chamados fenótipos digitais. A identificação e avaliação desses biomarcadores para diagnóstico da saúde fornece subsídios a uma área afim da telemedicina, a medicina de precisão. Foi desenvolvido um aplicativo para celular chamado Neuropesquisa, que possui recursos voltados a encontrar esses biomarcadores enquanto os usuários preenchem escalas psicológicas para saúde mental. O objetivo foi correlacionar mindfulness, ansiedade e tempo de reação e rastrear possíveis fenótipos digitais dessas pessoas. Realizou-se um estudo observacional, de delineamento correlacional, transversal e remoto com 364 adultos pelo Neuropesquisa. Foram encontradas correlações positivas e significativas entre mindfulness e tempo de reação, e negativas e significativas para ansiedade e tempo de reação. Concluiu-se que Neuropesquisa foi capaz de identificar fenótipos digitais dentre os constructos avaliados, de relevante importância para medicina de precisão e saúde mental.

Research in telemedicine has made it possible to capture regulatory measures to find biomarkers of human behavior during smartphone use called digital phenotypes. The identification and evaluation of these biomarkers for health diagnosis provide gains for an area related to telemedicine, precision medicine. It was developed a mobile application called Neuropesquisa, which has features to find these biomarkers while users complete psychological scales for mental health. The aim was to correlate mindfulness, anxiety and reaction time, and track possible digital phenotypes of users. This was an observational study, with a cross-sectional, correlational, and remote design with 364 adults, through Neuropesquisa. There were positive correlations between mindfulness and reaction time, and negative correlations between anxiety and reaction time. It was concluded that Neuropesquisa was able to identify digital phenotypes among the considered constructs, of relevant importance for precision medicine and mental health.

Analysis of the application of orthopedic robot assisted technology in bone tumor surgery / 中华骨科杂志

Intellectualization and precision are important directions of development and research highlights of orthopaedic surgery at present. The orthopaedic robot-assisted technology is gradually applied to various orthopaedic specialties. However the application of robot-assisted technology in bone tumor surgery started relatively late and the scenarios suitable for clinical application are relatively limited. By searching PubMed, Embase, ScienceDirect, CNKI and Wanfang database about the application of orthopaedic robot-assisted technology in the field of bone tumor surgery, we analyzed its intelligence and precision requirements, sorted and analyzed the current clinical application of orthopaedic robot in bone tumor surgery. The robot-assisted puncture biopsy of bone tumor could improve the accuracy and positive rate, especially for tumors with small size, deep location and complex local anatomical structure. For robot-assisted precise osteotomy for bone tumors, the accuracy and error analysis of manual osteotomy and robot-assisted osteotomy in the literatures were compared. The robot-assisted technology has the potential to improve the accuracy of tumor resection at complex anatomical structures such as sacrum and pelvic tumors. For the application of robot-assisted technology in spinal tumor surgery, literature reports suggested that it can improve the accuracy of pedicle screw placement and the safety of minimally invasive vertebroplasty, and can be used for minimally invasive precise surgical resection of spinal tumors. At the same time, the existing problems and development directions were analyzed, such as cost-effectiveness, accuracy of registration, soft tissue recognition and feedback, error superposition and error correction, so as to provide reference basis for further clinical application and study.

3D-PCT-assisted CT-guided radioactive particle implantation precision / 中华放射医学与防护杂志

Objective:To study the precision of 3D printing coplanar template (3D-PCT) assisted CT-guided radioactive particle implantation using two types of phantoms, and compare the differences between the phantoms, in order to provide reference for radioactive particle implantation.Methods:The needle inserting path was designed in the brachytherapy treatment planning system (BTPS) and the needle tip coordinates were obtained. Following the needle inserting path, the implant needles were inserted into the custom and the liver phantoms, respectively. Then gold markers were implanted through the needles. Subsequently, the needles were withdrawn by 10 mm, and the cold sources were implanted. The coordinates of needle tips, gold markers, and cold sources were recorded. The precision of implanted needles, first particles, and particles after needle withdrawal were obtained by calculating the distance between two points in the space. Finally, the differences between the two phantoms were compared through independent samples t-test. Results:In the 3D-PCT-assisted CT-guided radioactive particle implantation, the precision of implanted needles, first particles, and particles after needle withdrawal in the custom and the liver phantoms was (1.89±0.72) and (2.14±0.88 ) mm ( P>0.05), (2.03±1.14) and (2.42±1.12) mm ( P>0.05), and (-1.96±1.29) and (-2.82±0.91) mm ( t=2.09, P=0.046), respectively. Conclusions:The 3D-PCT-assisted CT-guided radioactive particle implantation is efficient, stable, and precise, showing slight precision differences between the two phantoms.

Management of chronic obstructive pulmonary disease in the era of precision medicine / 中国医师杂志

Chronic obstructive pulmonary disease (COPD) is a heterogeneous chronic respiratory disease characterized by persistent respiratory symptoms, airflow limitations, and local and systemic inflammation. In the past 20 years, Precision medicine has been continuously integrated into the individualized management of COPD, bringing benefits to patients. With a deeper understanding of specific biomarkers and more treatable features of chronic obstructive pulmonary disease, its application prospects are broad.

Precision medicine in chronic obstructive pulmonary disease / 中国医师杂志

Chronic obstructive pulmonary disease (COPD) is a complex and heterogeneous chronic Respiratory disease. In the past 20 years, precision medicine has gradually integrated into the management of COPD. At present, individualized treatment is mainly based on its symptoms, acute exacerbation risk and eosinophil count. In the future, with the development of risk factors and their pathophysiology, quantitative imaging technology, biomarkers and gene analysis, precision medicine will have further development in the management of COPD treatment.

Comments on research status and future of rare diseases in China / 中国热带医学

@#Rare diseases, also known as "orphan diseases", refer to diseases with very low incidence. Countries and regions define rare diseases according to epidemiological standards, economic standards of rare drugs and disease severity. The World Health Organization (WHO) has suggested the prevalence rate of less than 6.5 to 10 per 10 000 people to define rare diseases. In May 2018, "China's First List of Rare Diseases" was released, including 121 rare diseases. Most rare diseases are hereditary diseases with early onset, severe disease, and poor prognosis. About 75% of rare genetic diseases occur in the neonatal period or childhood, which are important part of human birth defects and brings a huge burden to society and families. The effective prevention and treatment of rare diseases is one of the important goals of building a "Healthy China". With the development of molecular biology technology and the continuous research and development of advanced medical products in the field of gene therapy, the level of clinical diagnosis and treatment of rare diseases has risen to a new level, which provides a possibility for the cure of some rare diseases. In China, most rare diseases rely on imported drugs, which cost a lot and bring heavy economic burden to patients. Improving the medical insurance system for rare diseases has become a difficult point in the current medical reform. This paper mainly discusses the definition of rare diseases, the research status, efforts and future development direction of rare diseases in China, in order to deepen the understanding and response of medical workers and the whole society to rare diseases.

Analysis of personalized precision diagnosis of 156 children with suspected rare inherited metabolic diseases / 中国热带医学

@#Abstract: Objective　To explore the accurate diagnosis of children with suspected rare inherited metabolic diseases, and to compare the application value of mass spectrometry and genetic testing in the diagnosis of rare inherited metabolic diseases (IMD). Methods　The clinical information, mass spectrometry, and genetic results of children with suspected rare inherited metabolic diseases admitted to the Department of Pediatrics, the Affiliated Haikou Hospital of Xiangya Medical College, Central South University from March 2017 to December 2021 were analyzed retrospectively. Results　156 children with suspected rare inherited metabolic diseases were detected by mass spectrometry, 67 cases were positive and 89 cases were negative. Children with positive initial examination were retested, and 19 cases were positive. Among the retest positive cases, 13 cases were given genetic testing, and 9 cases were positive and 4 cases were negative. Among the initial negative cases, 54 children with poor therapeutic effect and high clinical suspicion of inherited metabolic diseases completed genetic testing, 15 cases were positive and 39 cases were negative. The results of the two detection methods were compared, the positive rate of mass spectrometry was 19.4%(13/67), and the positive rate of genetic testing was 35.8%(24/67). The continuity correction of Pearson's chi-square test of continuity correction suggested that the results of genetic testing and mass spectrometry were different, and the difference was statistically significant (P<0.05). Taking genetic testing as the gold standard, the sensitivity and specificity of mass spectrometry detection were 37.5% (95%CI:19.6%-59.2%) and 90.7% (95%CI:76.9%-97.0%), respectively. Among the 24 confirmed cases, 5 cases were diagnosed by gene panel and 19 cases were diagnosed by whole exome sequencing (WES). One case diagnosed by WES had no pathogenic mutation detected by gene panel before diagnosis. The detection of DNM1L gene c.1040C>G and AMN gene c.651+1G>C are novel pathogenic gene variants, which have clinical significance. Conclusions　The ability of mass spectrometry in the diagnosis of inherited metabolic diseases is limited. Genetic testing, especially whole exome sequencing, can be the first choice for individualized diagnosis of suspected rare inherited metabolic diseases. In addition, the new mutation sites found by WES in this study enriched the pathogenic gene mutation spectrum and provided direction for further functional biological experiments.

Application of Microfluidic Liver and Kidney Chips in Toxicology Research of Chinese Medicine / 中国实验方剂学杂志

Microfluidic liver and kidney chips have become preferred model carriers in recent years for new drug development， pharmacological and toxicological research， mechanism exploration， and disease model construction. In the context of the USA. Food and Drug Administration allowing the use of in vitro model data as a substitute for animal model data in new drug applications when animal disease models are difficult to construct， microfluidic chips have received widespread attention due to their high throughput， ability to highly mimic biological characteristics of living organisms， convenient evaluation of drug toxicity in normal or pathological states with repeated dosing， real-time induction and monitoring of culture processes， and real-time data acquisition and analysis. In toxicology research， liver and kidney chips can construct in vitro models suitable for the pharmacological and toxicological detection of different substances by combining 2D monocultures and co-cultures from different species sources， 3D cultures， spheroids/organoid cells， precision-cut liver and kidney slices， immortalized cell lines， or sandwich-cultured cell lines. This model maximally simulates or retains the organ function and in vivo microenvironment of the liver and kidney， including specific physiological tissue structures， multicellular interactions/crosstalk， and multi-organ coordination/feedback， to obtain results similar to or the same as in vivo experimental data， reducing interspecies differences. At the same time， it greatly reduces the use of experimental animals and lowers costs. Microfluidic technology provides necessary shear force microenvironments for the cultivation of contents and solves problems encountered in the cultivation process of liver and kidney chips， such as insufficient tissue oxygen supply， nutrient deficiencies， and accumulation of metabolites， leading to cell apoptosis and even tissue necrosis fibrosis， which make it difficult to maintain long-term structure and function. This article reviewed the application of microfluidic technology combined with liver and kidney chips in Chinese medicine toxicology research. By summarizing the development of microfluidic technology， liver chips， kidney chips， and providing application examples of microfluidic liver and kidney chips in Chinese medicine toxicology research， combined with the characteristics of Chinese medicine administration， the article explored the advantages and future development directions of their application in the field of Chinese medicine toxicology research.

The quantitative analysis methods validation of Paeonia Anomala L. Tincture / Монголын эм зүй, эм судлал

Introduction@#The development of analytical methods for evaluation of quality standard parameters of drugs and other health prophylactic, diagnostic, and therapeutic products is essential from the beginning in the process to release to the market finished product. Validation of developed analytical methods is one crucial part of the analysis.</br> Quantitative determination methods of the total main active compounds of the tincture prepared from the root and the herb of <i>Paeonia anomala</i> L. were developed. In order to verify whether the analytical procedure is suitable for its intended purpose parameters – accuracy, reproducibility, intermediate precision, and linearity were validated.@*Materials and methods@#The total phenolics in the tincture were determined by the reaction with Folin Chicolteau reagent and total monoterpene glycosides by the reaction with hydroxylamine in alkaline solution and ferric (III) chloride following spectrophotometric examination, respectively. Based on the achieved results of the developed quantitative methods which were validated according to the accepted and pursued technical documents in our country the Eurachem guide “The Fitness for Purpose of Analytical Methods” and Russian Pharmacopoeia 13 “Validation of analytical methodology”, where parameters as accuracy, precision – reproducibility, intermediate precision, and linearity are involved.@*Conclusions@#Statistical analysis of total phenolic compounds and total monoterpene glycosides in the <i>Paeonia anomala</i> tincture demonstrated that the bias calculated was for accuracy 0.674% and 0.703%, relative standard deviations were for reproducibility 0.896% and 0.798%, for inter- mediate precision 0.922% and 0.696%, respectively and the linearity – R²=0.9985 and R²=0.9997. All achieved results validated the appropriateness of the developed quantitative methods for the intended purpose.

Benzimidazole and its derivatives as cancer therapeutics: The potential role from traditional to precision medicine

Cancer is the second leading cause of mortality globally which remains a continuing threat to human health today. Drug insensitivity and resistance are critical hurdles in cancer treatment; therefore, the development of new entities targeting malignant cells is considered a high priority. Targeted therapy is the cornerstone of precision medicine. The synthesis of benzimidazole has garnered the attention of medicinal chemists and biologists due to its remarkable medicinal and pharmacological properties. Benzimidazole has a heterocyclic pharmacophore, which is an essential scaffold in drug and pharmaceutical development. Multiple studies have demonstrated the bioactivities of benzimidazole and its derivatives as potential anticancer therapeutics, either through targeting specific molecules or non-gene-specific strategies. This review provides an update on the mechanism of actions of various benzimidazole derivatives and the structure‒activity relationship from conventional anticancer to precision healthcare and from bench to clinics.

Application of nomogram in corneal refractive surgery / 中华实验眼科杂志

Corneal refractive surgery is widely used to correct myopia and astigmatism because of its safety, effectiveness and stability.Precision medicine is the future direction of development, and the demands for accuracy in corneal refractive surgery are also increasing, which has a direct impact on patient satisfaction.Nomogram, as a key design in refractive surgery, needs to be combined with several important predictors to quantify individual risk.Different surgical methods need different nomograms.In this paper, the effects of corneal surface surgery, lamellar surgery, modeling algorithm and possible factors such as patient's sex, age, expected correction, corneal curvature, preoperative spherical equivalent, etc.on the predicted values were discussed.At the same time, the application of nomograms in corneal refractive surgery at home and abroad in recent years and the research progress of nomogram influencing factors were explored, in order to provide more and more accurate reference for clinical practice, to improve the accuracy of corneal refractive surgery and help patients achieve satisfactory postoperative visual quality.