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3D-printed Mg-1Ca/polycaprolactone composite scaffolds with promoted bone regeneration

Journal of Magnesium and Alloys 2024年第3期12卷 966-979页

作者： Xiao Zhao Siyi Wang Feilong Wang Yuan Zhu Ranli Gu Fan Yang Yongxiang Xu Dandan Xia Yunsong Liu department of Prosthodontics Peking University School and Hospital of StomatologyBeijing 100081China National Center of Stomatology National Engineering Laboratory for Digital and Material Technology of StomatologyNational Clinical Research Center for Oral DiseasesBeijing Key Laboratory of Digital StomatologyResearch Center of Engineering and Technology for Computerized Dentistry Ministry of HealthNMPA Key Laboratory for Dental MaterialsBeijing 100081China department of Dental Materials Peking University School and Hospital of StomatologyBeijing 100081China

In bone tissue engineering,polycaprolactone(PCL)is a promising material with good biocompatibility,but its poor degradation rate,mechanical strength,and osteogenic properties limit its *** this study,we developed an Mg-1Ca/polycaprolactone(Mg-1Ca/PCL)composite scaffolds to overcome these *** used a melt blending method to prepare Mg-1Ca/PCL composites with Mg-1Ca alloy powder mass ratios of 5,10,and 20 wt%.Porous scaffolds with controlled macro-and microstructure were printed using the fused deposition modeling *** explored the mechanical strength,biocompatibility,osteogenesis performance,and molecular mechanism of the Mg-1Ca/PCL *** 5 and 10 wt%Mg-1Ca/PCL composites were found to have good ***,they promoted the mechanical strength,proliferation,adhesion,and osteogenic differentiation of human bone marrow stem cells(hBMSCs)of pure *** vitro degradation experiments revealed that the composite material stably released Mg_(2)+ions for a long period;it formed an apatite layer on the surface of the scaffold that facilitated cell adhesion and *** tomography and histological analysis showed that both 5 and 10 wt%Mg-1Ca/PCL composite scaffolds promoted bone regeneration bone *** results indicated that the Wnt/β-catenin pathway was involved in the osteogenic ***,Mg-1Ca/PCL composite scaffolds are expected to be a promising bone regeneration material for clinical *** of significance:Bone tissue engineering scaffolds have promising applications in the regeneration of critical-sized bone ***,there remain many limitations in the materials and manufacturing methods used to fabricate *** study shows that the developed Ma-1Ca/PCL composites provides scaffolds with suitable degradation rates and enhanced boneformation ***,the fused deposition modeling method allows precise control of the macroscopic morphology and microsc

关键词： 3D printing Bone tissue engineering Magnesium Osteogenic Polycaprolactone Scaffold.

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Using microglia-derived extracellular vesicles to capture diversity of microglial activation phenotypes following neurological injury

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Neural Regeneration Research 2024年第8期19卷 1633-1634页

作者： Austyn D.Roseborough Nikita Ollen-Bittle Shawn NWhitehead Vulnerable Brain Laboratory Department of Anatomy&Cell BiologySchulich School of Medicine&DentistryLondonOHCanada

Microglia are one of the three glial cell populations in the central nervous system(CNS),along with astrocytes and *** microglia are unique among brain cells due to their hematologic origin and perform immune function... 详细信息

关键词： neurological cytes activation

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Glycerol solutions of highly concentrated biomineral counter-ions towards water-responsive mineralization: Demonstration on bacterial cellulose and its application in hard tissue repair

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Nano Research 2024年第3期17卷 2154-2163页

作者： Yunfei Zhao Xiaohao Liu Zhi Zhou Chaobo Feng Nan Luo Jiajun Yan Shuo Tan Yang Lu Feng Chen Bing-Qiang Lu Shisheng He department of Orthopedic Spinal Pain Research InstituteShanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200072China department of preventive dentistry Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineCollege of StomatologyShanghai Jiao Tong UniversityNational Center for StomatologyNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of StomatologyShanghai Research Institute of StomatologyShanghai 200011China

Mineralization has found widespread use in the fabrication of composite biomaterials for hard tissue *** current mineralization processes are mainly carried out in neutral aqueous solutions of biomineral counter-ions(a pair of cation and anion that form the corresponding minerals at certain conditions),which are stable only at very low *** typically results in inefficient mineralization and weak control over biomineral ***,we find that,in the organic solvent glycerol,a variety of biomineral counter-ions(e.g.,Ca/PO_(4),Ca/CO_(3),Ca/SO_(4),Mg/PO_(4),or Fe/OH)corresponding to distinct biominerals at significantly high concentrations(up to hundreds-fold greater than those of simulated body fluid(SBF))are able to form translucent and stable solutions(mineralizing solution of highly concentrated counter-ions(MSCIs)),and mineralization can be triggered upon them with external solvents(e.g.,water or ethanol).Furthermore,with pristine bacterial cellulose(BC)membrane as a model,we demonstrate an effective and controllable mineralization performance of MSCIs on organic *** approach not only forms the homogeneous biominerals on the BC fibers and in the interspaces,but also provides regulations over mineralization rate,mineral content,phase,and *** resulting mineralized BC membranes(MBCs)exhibit high cytocompatibility and favor the proliferation of rat bone marrow mesenchymal stem cells(rBMSC).Following this,we prepare a mineralized bone suture(MBS)from MBC for non-weight bearing bone fixation,which then is tested on a rabbit median sternotomy *** shows firm fixation of the rabbit sternum without causing discernible toxicity or inflammatory *** study,by extending the mineralization to the organic solution system of highly concentrated counter-ions,develops a promising strategy to design and build targeted mineral-based composites.

关键词： biomineralization organic solvent bacterial cellulose(BC) hard tissue repair

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A critical review of diagnostic and prognostic markers of chronic hepatitis B infection

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Medical Review 2024年第3期4卷 225-234页

作者： Shuaibu Abdullahi Hudu Sa’adatu Haruna Shinkafi Abdulgafar Olayiwola Jimoh department of Basic Medical and Dental Sciences Faculty of DentistryZarqa UniversityZarqa 13110Jordan department of Microbiology and Parasitology Usmanu Danfodiyo University Teaching HospitalSokotoSokoto StateNigeria department of Pharmacology and Therapeutics Faculty of Basic Clinical SciencesCollege of Health SciencesUsmanu Danfodiyo UniversitySokoto840232 Sokoto StateNigeria

A major worldwide health concern,chronic hepatitis B necessitates precise prognostic and diagnostic indicators for clinical *** article highlights the clinical importance and current issues of the major markers used in both the detection and prognosis of chronic hepatitis *** important indicator of an ongoing and persistent infection is the hepatitis B surface *** B virus DNA quantification monitoring aids in assessing viral load and hepatic cancer *** limited evidence of liver damage is provided by alanine aminotransferase levels,the hepatitis B core antibody verifies acute ***version to the hepatitis B e antibody is linked to a lower risk of disease development,and the hepatitis B e antigen status is a critical prognostic *** choices are guided by a biopsy of the liver or minimally invasive liver fibrosis *** of the hepatitis B virus and host variables influence the prognosis by adding to the disease’s *** techniques to evaluate the severity of the disease are provided by serum markers of fibrosis,such as the fibrosis score based on four criteria and the aspartate aminotransferase-to-platelet ratio *** requirement for indicators that distinguish between distinct viral phases and increase specificity in evaluating liver damage is one of the challenges facing chronic hepatitis B *** though it is quite difficult to find reliable biomarkers for resistance especially when it comes to hepatocellular cancer risk estimation,there are advanced methods,which include imaging and omics that can help in improving the accuracy of the diagnostics and *** early point that improve patient outcomes are made possible using diagnostics and prognostics as they are quite effective in managing the complicated landscape of chronic hepatitis *** in addressing these challenges today and improving the diagnostic and prognostic markers in the future,particula

关键词： chronic hepatitis prognostic scores seromarkers surrogate markers

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Associations of Gestational Exposure to Air Pollution and Polycyclic Aromatic Hydrocarbons with Placental Inflammation

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Environment & Health 2024年第9期2卷 672-680页

作者： Emily A.Craig Yan Lin Yihui Ge Xiangtian Wang Susan K.Murphy Donald K.Harrington Richard K.Miller Sally W.Thurston Philip K.Hopke Emily S.Barrett Thomas G.O’Connor David Q.Rich Junfeng Zhang Nicholas School of the Environment&Duke Global Health Institute Duke UniversityDurhamNorth Carolina 27708United States department of Psychiatry University of Rochester School of Medicine and DentistryRochesterNew York 14642United States department of Obstetrics and Gynecology University of Rochester School of Medicine and DentistryRochesterNew York 14642United States department of Environmental Medicine and department of Pediatrics University of Rochester School of Medicine and DentistryRochesterNew York 14642United States department of Psychology University of RochesterRochesterNew York 14642United States department of Biostatistics and Computational Biology and department of Environmental Medicine University of Rochester School of Medicine and DentistryRochesterNew York 14642United States department of Public Health Sciences University of Rochester School of Medicine and DentistryRochesterNew York 14642United States department of Biostatistics and Epidemiology Rutgers School of Public HealthPiscatawayNew Jersey 08854United States department of Psychiatry and department of Neuroscience University of Rochester School of Medicine and DentistryRochesterNew York 14642United States department of Public Health Sciences Department of Medicineand Department of Environmental MedicineUniversity of Rochester School of Medicine and DentistryRochesterNew York 14642United States

Restricted fetal growth(RFG)is a leading contributor to perinatal mortality and has been associated with gestational exposure to air pollution,such as fine particulate matter(PM_(2.5)),nitrogen dioxide(NO2),and polycyclic aromatic hydrocarbons(PAHs).This study examines the association between trimester-specific and weekly means of air pollution throughout gestation and placental inflammatory markers at *** a prospective cohort study of 263 pregnant women in Rochester,NY,we measured interleukin-6(IL-6)and tumor necrosis factor-alpha(TNF-α)in placental tissue and estimated gestational exposure to PM_(2.5)and NO_(2)using a high-resolution spatial-temporal *** to PAHs was estimated using urinary 1-hydroxypyrene(1-OHP)concentrations collected once per *** distributed lag models with a penalized spline function,each interquartile range(2.6μg/m^(3))increase in PM_(2.5)concentration during gestational weeks 6−11 was associated with decreased placental IL-6 levels(−22.2%,95%CI:−39.0%,−0.64%).Using multiple linear regression models,each interquartile range increase of 1-OHP was associated with an increase in TNF-αin the first trimester(58.5%,95%CI:20.7%,74.2%),third trimester(22.9%,95%CI:0.04%,49.5%),and entire pregnancy(29.6%,95%CI:3.9%,60.6%).Our results suggest gestational exposure to air pollution may alter the inflammatory environment of the placenta at delivery.

关键词： pregnancy air pollution PAHs placenta tumor necrosis factor interleukin

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Misinterpretation of sleep-induced second-degree atrioventricular block

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World Journal of Cardiology 2024年第7期16卷 385-388页

作者： S Serge Barold department of Medicine University of Rochester School of Medicine and DentistryRochesterNY 14642United States

A number of publications have claimed that Mobitz type Ⅱ atrioventricular block(AVB)may occur during *** of the reports defined type Ⅱ AVB and representative electrocardiograms were either misinterpreted or *** benign Wenckebach type Ⅰ AVB is often misdiagnosed as Mobitz type Ⅱ which is an indication for a *** of the published reports indicates that Mobitz type II AVB does not occur during sleep when it is absent in the awake ***:There is no proof that sleep is associated with Mobitz type Ⅱ AVB.

关键词： Wenckebach type I atrioventricular block Mobitz typeⅡatrioventricular block Vagal tone Heart block Cardiac pacemaker

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Expert consensus on endodontic therapy for patients withsystemic conditions

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International Journal of Oral Science 2024年第3期16卷 390-397页

作者： Xin Xu Xin Zheng Fei Lin Qing Yu Benxiang Hou Zhi Chen Xi Wei Lihong Qiu Wenxia Chen Jiyao Li Lili Chen Zuomin Wang Hongkun Wu Zhiyue Lu Jizhi Zhao Yuhong Liang Jin Zhao Yihuai Pan Shuang Pan Xiaoyan Wang Deqin Yang Yanfang Ren Lin Yue Xuedong Zhou State Key Laboratory of Oral Diseases&National clinical Research Center for Oral Diseases&department of Cariology and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina department of Cariology and Endodontology Peking University School and Hospital of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research of Oral Biomaterials and Digital Medical Devices&Beijing Key Laboratory of Digital StomatologyPeking UniversityBeijingChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of Oral DiseasesDepartment of Operative Dentistry&EndodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi’anChina Center for Microscope Enhanced dentistry Beijing Stomatological HospitalCapital Medical UniversityBeijingChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration Key Laboratory of Oral Biomedicine Ministry of EducationHubei Key Laboratory of StomatologySchool&Hospital of StomatologyWuhan UniversityWuhanChina department of Operative dentistry and Endodontics Hospital of StomatologyGuanghua School of StomatologySun Yat-Sen University&Guangdong Provincial Key Laboratory of StomatologyGuangzhouChina department of Endodontics School of StomatologyChina Medical UniversityShenyangChina College&Hospital of Stomatology Guangxi Medical UniversityNanningChina department of Stomatology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina department of Stomatology Beijing Chaoyang HospitalCapital Medical UniversityBeijingChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National clinical Research Center for Oral Diseases&department of Geriatric dentistry West China Hospital of StomatologySichuan UniversityChengduChina Beijing Hospital National Center of GerontologyBeijingChina department of Stomatology Peking Union Medical College Hospit

The overall health condition of patients significantly affects the diagnosis, treatment, and prognosis of endodontic diseases. Asystemic consideration of the patient’s overall health along with oral conditions holds the utmost importance in determining thenecessity and feasibility of endodontic therapy, as well as selecting appropriate therapeutic approaches. This expert consensus is acollaborative effort by specialists from endodontics and clinical physicians across the nation based on the current clinical evidence,aiming to provide general guidance on clinical procedures, improve patient safety and enhance clinical outcomes of endodontictherapy in patients with compromised overall health.

关键词： patients diagnosis prognosis

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Advances in clinical applications of bioceramics in the new regenerative medicine era

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World Journal of clinical Cases 2024年第11期12卷 1863-1869页

作者： Noha Elshazly Fayza Eid Nasr Ayat Hamdy Safa Saied Mohamed Elshazly Tissue Engineering Laboratory Faculty of DentistryAlexandria UniversityAlexandria 21526Egypt department of Biochemistry Faculty of ScienceAlexandria UniversityAlexandria 21526Egypt Public Dental Clinic Central Administration of DentistryMinistry of Health and PopulationAlexandria 21554Egypt department of Surgery Faculty of Veterinary MedicineAlexandria 21526Egypt

In this editorial,we comment on the hard and soft tissue applications of different ceramic-based scaffolds prepared by different mechanisms such as 3D printing,sol-gel,and *** new concept of regenerative medicine relies on biomaterials that can trigger in situ tissue regeneration and stem cell recruitment at the defect site.A large percentage of these biomaterials is ceramic-based as they provide the essential requirements of biomaterial principles such as tailored multisize porosity,antibacterial properties,and angiogenic *** these previously mentioned properties put bioceramics on top of the hierarchy of biomaterials utilized to stimulate tissue regeneration in soft and hard tissue *** clinical applications registered the use of these materials in triggering soft tissue regeneration in healthy and diabetic patients such as bioactive glass *** results were promising and opened new frontiers for utilizing these materials on a larger *** same results were mentioned when using different forms and formulas of bioceramics in hard defect *** bioceramics were used in combination with other polymers and biological scaffolds to improve their regenerative and mechanical *** this progress will enable a larger scale of patients to receive such services with ease and decrease the financial burden on the government.

关键词： Regenerative medicine Bioceramics Chronic wounds Bone defects clinical applications

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Study on Distribution of Four Pseudomonas Species in Living Environment Using Multiplex PCR

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Open Journal of Stomatology 2024年第2期14卷 77-86页

作者： Sachiyo Hayashi Koji Umezawa Osamu Tsuzukibashi Akira Fukatsu Mana Fuchigami Chiaki Komine Hiroshi Yamamoto Mio Hagiwara-Hamano Yukiko Iizuka Satoshi Uchibori Masanobu Wakami Hiroshi Murakami Taira Kobayashi Masahiko Fukumoto Takato Nomoto department of Special Needs dentistry Nihon University School of Dentistry at Matsudo Chiba Japan department of Laboratory Medicine for dentistry for the Compromised Patient Nihon University School of Dentistry at Matsudo Chiba Japan department of Oral Surgery Nihon University School of Dentistry at Matsudo Chiba Japan department of Fixed Prosthodontics Nihon University School of Dentistry at Matsudo Chiba Japan department of Oral Implantology Nihon University School of Dentistry at Matsudo Chiba Japan

Purpose: The genus Pseudomonas is a ubiquitous microorganism frequently detected from immunocompromised patients. The inherent resistance to numerous antimicrobial agents contributes to the opportunistic character of this pathogen exhaustive monitoring of this pathogen is considered of critical importance to public health organizations. The reliable identification method able to distinguish genetic close Pseudomonas species is needed, because these organisms are difficult to differentiate by phenotypic or biochemical methods. The purpose of the present study was to design species-specific primers in order to identify and detect four Pseudomonas species which are frequently detected from the human oral cavities, and to investigate the distribution of these organisms in the living environment using a multiplex PCR. Methods: Polymerase chain reaction (PCR) primers were designed based on partial sequences of the rpoD gene of four Pseudomonas species. Swab samples were collected from fifty washstands, and the distribution of Pseudomonas species was investigated using a conventional PCR at genus level and a multiplex PCR at species level. Results: Multiplex PCR method developed in this study was able to distinguish four Pseudomonas species clearly. The genus Pseudomonas was detected from all samples (100%), whereas P. putida, P, aeruginosa, P. stutzeri and P. fluorescens were detected at 44%, 8%, 4% and 2% in fifty swab samples, respectively. Conclusion: Our developed one-step multiplex PCR method is accurate, specific, cost-effective, time-saving, and works without requiring DNA extraction. It was indicated that washstands were the uninhabitable environment for P. putida, P, aeruginosa, P. stutzeri and P. fluorescens.

关键词： Genus Pseudomonas Multiplex PCR Living Environment

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Expert consensus on difficulty assessment of endodontic therapy

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International Journal of Oral Science 2024年第1期16卷 15-25页

作者： Dingming Huang Xiaoyan Wang Jingping Liang Junqi Ling Zhuan Bian Qing Yu Benxiang Hou Xinmei Chen Jiyao Li Ling Ye Lei Cheng Xin Xu Tao Hu Hongkun Wu Bin Guo Qin Su Zhi Chen Lihong Qiu Wenxia Chen Xi Wei Zhengwei Huang Jinhua Yu Zhengmei Lin Qi Zhang Deqin Yang Jin Zhao Shuang Pan Jian Yang Jiayuan Wu Yihuai Pan Xiaoli Xie Shuli Deng Xiaojing Huang Lan Zhang Lin Yue Xuedong Zhou State Key Laboratory of Oral Diseases&National Center for Stomatology&National clinical Research Center for Oral Diseases&department of Operative dentistry and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina department of Cariology and Endodontology Peking University School and Hospital of Stomatology&National Center of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of Stomatology&Beijing Key Laboratory of Digital Stomatology&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&NMPA Key Laboratory for Dental MaterialsBeijingChina department of Endodontics Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineCollege of StomatologyShanghai Jiao Tong UniversityNational Clinical Research Center for Oral DiseasesNational Center for StomatologyShanghai Key Laboratory of StomatologyShanghaiChina department of Operative dentistry and Endodontics Hospital of StomatologyGuanghuaSchool of StomatologySun Yat-Sen University&Guangdong Provincial Key Laboratory of StomatologyGuangzhouChina The State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei-MOST)&Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of StomatologyWuhan UniversityWuhanChina department of Operative dentistry&Endodontics School of StomatologyThe Fourth Military Medical UniversityXi’anChina department of Endodontics Beijing Stomatological HospitalSchool of StomatologyCapital Medical UniversityBeijingChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National clinical Research Center for Oral Diseases&department of preventive dentistry West China Hospital of StomatologySichuan UniversityChengduChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National clinical Research Center for Oral Diseases&department of Geriatric dentistry West China Hospital of Stomatology

Endodontic diseases are a kind of chronic infectious oral disease. Common endodontic treatment concepts are based on the removal of inflamed or necrotic pulp tissue and the replacement by gutta-percha. However, it is very essential for endodontic treatment to debride the root canal system and prevent the root canal system from bacterial reinfection after root canal therapy(RCT). Recent research, encompassing bacterial etiology and advanced imaging techniques, contributes to our understanding of the root canal system’s anatomy intricacies and the technique sensitivity of RCT. Success in RCT hinges on factors like patients, infection severity, root canal anatomy, and treatment techniques. Therefore, improving disease management is a key issue to combat endodontic diseases and cure periapical lesions. The clinical difficulty assessment system of RCT is established based on patient conditions, tooth conditions, root canal configuration, and root canal needing retreatment, and emphasizes pre-treatment risk assessment for optimal outcomes. The findings suggest that the presence of risk factors may correlate with the challenge of achieving the high standard required for RCT. These insights contribute not only to improve education but also aid practitioners in treatment planning and referral decision-making within the field of endodontics.

关键词： anatomy difficulty treatment

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