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Fabrication of patterned transparent conductive glass via laser metal transfer for efficient electrical heating and antibacteria

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Nano Research 2024年第3期17卷 1578-1584页

作者： Xiaoyan Liu Ting Zhang Mengchen Xu Yang Li Haiqing Wang Yuke Chen Xuzihan Zhang Zenan Wang Xiaoyan Li Weijia Zhou Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China School of Physics and Technology University of JinanJinan 250024China Department of Endodontics School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinan 250012China School of Information Science and engineering University of JinanJinan 250022China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

Vapor deposition and three-dimensional(3D)printing technology are considered to be conventional methods to achieve patterned metal film preparation through the assistance of masks and high temperature.Therefore,there are still some challenges in fabricating metal films in template-free and normal temperature environment.In this work,we report a flexible and rapid laser metal transfer(LMT)technique for fabricating the various metal films(Cu,Ni,Sn,Al,Fe,and Ag)with different patterns without templates on arbitrary substrates(glass,polyimide(PI)films,and aluminum nitride(AlN)ceramic).Especially,the obtained transparent conductive glass displays high transmittance(more than 90%)and adjustable resistances(≈5Ω).According to the Joule effect,the interface resistance between Cu particles and copper oxide coating produces the high temperature approximately 280℃ at 2 V in a short time(≈60 s)and remains stable at 120℃ over 12 h.At last,the multifunctional glass with Cu patterns also shows excellent bactericidal activity(≈95%).This work demonstrates that laser metal transfer is an exceeding effective means of fabricating the micro/nano structures with potential applications in functional devices.

关键词： laser metal transfer(LMT) transparent conductive glass electrical heating copper pattern antibacterial

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

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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 application.In this study,we developed an Mg-1Ca/polycaprolactone(Mg-1Ca/PCL)composite scaffolds to overcome these limitations.We 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 method.We explored the mechanical strength,biocompatibility,osteogenesis performance,and molecular mechanism of the Mg-1Ca/PCL composites.The 5 and 10 wt%Mg-1Ca/PCL composites were found to have good biocompatibility.Moreover,they promoted the mechanical strength,proliferation,adhesion,and osteogenic differentiation of human bone marrow stem cells(hBMSCs)of pure PCL.In 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 growth.Microcomputed tomography and histological analysis showed that both 5 and 10 wt%Mg-1Ca/PCL composite scaffolds promoted bone regeneration bone defects.Our results indicated that the Wnt/β-catenin pathway was involved in the osteogenic effect.Therefore,Mg-1Ca/PCL composite scaffolds are expected to be a promising bone regeneration material for clinical application.Statement of significance:Bone tissue engineering scaffolds have promising applications in the regeneration of critical-sized bone defects.However,there remain many limitations in the materials and manufacturing methods used to fabricate scaffolds.This study shows that the developed Ma-1Ca/PCL composites provides scaffolds with suitable degradation rates and enhanced boneformation capabilities.Furthermore,the fused deposition modeling method allows precise control of the macroscopic morphology and microscopic porosity of the scaffold.The obtained porou

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

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Study of the inflammatory activating process in the early stage of Fusobacterium nucleatum infected PDLSCs

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International Journal of oral Science 2023年第1期15卷 113-126页

作者： Yushang Wang Lihua Wang Tianyong Sun Song Shen Zixuan Li Xiaomei Ma Xiufeng Gu Xiumei Zhang Ai Peng Xin Xu Qiang Feng Department of Implantology School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinanChina Department of Human Microbiome School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinanChina Department of Orthodontics School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinanChina State key laboratory of microbial technology Shandong UniversityQingdaoChina

Fusobacterium nucleatum(F.nucleatum)is an early pathogenic colonizer in periodontitis,but the host response to infection with this pathogen remains unclear.In this study,we built an F.nucleatum infectious model with human periodontal ligament stem cells(PDLSCs)and showed that F.nucleatum could inhibit proliferation,and facilitate apoptosis,ferroptosis,and inflammatory cytokine production in a dose-dependent manner.The F.nucleatum adhesin Fad A acted as a proinflammatory virulence factor and increased the expression of interleukin(IL)-1β,IL-6 and IL-8.Further study showed that Fad A could bind with PEBP1 to activate the Raf1-MAPK and IKK-NF-κB signaling pathways.Time-course RNA-sequencing analyses showed the cascade of gene activation process in PDLSCs with increasing durations of F.nucleatum infection.NFκB1 and NFκB2 upregulated after 3 h of F.nucleatum-infection,and the inflammatory-related genes in the NF-κB signaling pathway were serially elevated with time.Using computational drug repositioning analysis,we predicted and validated that two potential drugs(piperlongumine and fisetin)could attenuate the negative effects of F.nucleatum-infection.Collectively,this study unveils the potential pathogenic mechanisms of F.nucleatum and the host inflammatory response at the early stage of F.nucleatum infection.

关键词： inflammatory drugs PDL

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Effects of interleukin-10 treated macrophages on bone marrow mesenchymal stem cells via signal transducer and activator of transcription 3 pathway

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World Journal of Stem Cells 2024年第5期16卷 560-574页

作者： Meng-Hao Lyu Ce Bian Yi-Ping Dou Kang Gao Jun-Ji Xu Pan Ma Department of Periodontics School of StomatologyCapital Medical UniversityBeijing 100050China Department of Orthodontics School of StomatologyCapital Medical UniversityBeijing 100050China Department of dental Implantology School of StomatologyCapital Medical UniversityBeijing 100050China Beijing Key laboratory of Tooth regeneration and Function Reconstruction School of StomatologyCapital Medical UniversityBeijing 100050China Beijing laboratory of oral Health Capital Medical UniversityBeijing 100050China

BACKGROUND Alveolar bone defects caused by inflammation are an urgent issue in oral implant surgery that must be solved.Regulating the various phenotypes of macrophages to enhance the inflammatory environment can significantly affect the progression of diseases and tissue engineering repair process.AIM To assess the influence of interleukin-10(IL-10)on the osteogenic differentiation of bone marrow mesenchymal stem cells(BMSCs)following their interaction with macrophages in an inflammatory environment.METHODS IL-10 modulates the differentiation of peritoneal macrophages in Wistar rats in an inflammatory environment.In this study,we investigated its impact on the proliferation,migration,and osteogenesis of BMSCs.The expression levels of signal transducer and activator of transcription 3(STAT3)and its activated form,phos-phorylated-STAT3,were examined in IL-10-stimulated macrophages.Subsequently,a specific STAT3 signaling inhibitor was used to impede STAT3 signal activation to further investigate the role of STAT3 signaling.RESULTS IL-10-stimulated macrophages underwent polarization to the M2 type through substitution,and these M2 macrophages actively facilitated the osteogenic differentiation of BMSCs.Mechanistically,STAT3 signaling plays a crucial role in the process by which IL-10 influences macrophages.Specifically,IL-10 stimulated the activation of the STAT3 signaling pathway and reduced the macrophage inflammatory response,as evidenced by its diminished impact on the osteogenic differentiation of BMSCs.CONCLUSION Stimulating macrophages with IL-10 proved effective in improving the inflammatory environment and promoting the osteogenic differentiation of BMSCs.The IL-10/STAT3 signaling pathway has emerged as a key regulator in the macrophage-mediated control of BMSCs’osteogenic differentiation.

关键词： Macrophages Interleukin-10 Bone marrow mesenchymal stem cells Signal transducer and activator of transcription 3 Inflammatory response

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CuS nanoenzyme against bacterial infection by in situ hydroxyl radical generation on bacteria surface

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Rare Metals 2023年第6期42卷 1899-1911页

作者： Zhao Li Cheng-Jia Xie Xiao-Wei Ren Qun Zhang Bao-Jin Ma Department of tissue engineering and regeneration School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration&Shandong Provincial Clinical Research Center for Oral DiseasesJinan250012China Jinan Food and Drug Inspection and Testing Center Jinan250010China

Nanoenzyme-mediated antibacterial strategies have been widely exploited to overcome the shortcomings(such as drug resistance and mild-to-severe side effects) of antibiotic therapy.The peroxidase-like activity of nanoenzymes possesses great potential against bacterial infection by the generation of hydroxyl radical(·OH) in the specific microenvironment.However,the lifetime of-OH is extremely short,and a large amount of the ·OH generated within the infection microenvironment cannot come into contact with bacteria quickly enough,thus resulting in low treatment efficiency.Here,chitosan-oligosaccharide-modified CuS nanoparticles possessing positive charges(PCuS NPs) were prepared using a one-pot method.PCuS NPs exhibited efficient peroxidase-like activity.Importantly,the PCuS NPs can combine with bacteria via electrostatic attraction.The direct contact between the PCuS NPs and bacteria enabled the generation of ·OH in situ on the bacterial surface,ultimately leading to a high antibacterial efficacy at a low concentration in the presence of H_(2)O_(2).At an effective antibacterial concentration,the PCuS NPs exhibited high cytocompatibility.Furthermore,in vivo results revealed that PCuS NPs not only decreased the size of abscesses but also reduced inflammation and promoted collagen fiber formation.Therefore,PCuS NPs possess great potential against bacterial infection via in situ ·OH generation based on electrostatic attraction.

关键词： Antibacterial CuS Nanoenzyme In situ ·OH generation Electrostatic attraction

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Surface demineralized freeze-dried bone allograft followed by reimplantation in a failed mandibular dental implant

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Regenerative Biomaterials 2024年第1期3卷 82-93页

作者： Jing Zhang Jie Wang Jiayi You Xuan Qin Huimin Chen Xiantong Hu Yantao Zhao Yang Xia Jiangsu Key laboratory of oral Diseases Nanjing Medical UniversityNanjingJiangsu 210029PR China Jiangsu Province engineering Research Center of Stomatological Translational Medicine Nanjing Medical UniversityNanjingJiangsu 210029PR China Department of Restorative dental Sciences Faculty of DentistryThe University of Hong KongHong Kong SARPR China Senior Department of Orthopedics The Fourth Medical Center of PLA General HospitalBeijing100048PR China Beijing engineering Research Center of Orthopedics Implants Beijing 100048PR China State Key laboratory of Military Stomatology Xi'an 710032PR China

The removal of a failed implant with high torque causes significant damage to the surrounding tissue,compromising bone regeneration and subsequent osseointegration in the defect area.Here,we report a case of carrier screw fracture followed by immediate implant removal,bone grafting and delayed reimplantation.A dental implant with a fractured central carrier screw was removed using the bur-forceps technique.The resulting three-wall bone defect was filled with granular surface demineralized freeze-dried bone allograft(SD-FDBA).Cone-beam computerized tomography was performed at 1week,6months and 15months postoperatively and standardized for quantitative evaluation.The alveolar bone width and height at 15months post-surgery were about 91%of the original values,with a slightly lower bone density,calculated using the gray value ratio.The graft site was reopened and was found to be completely healed with dense and vascularized bone along with some residual bone graft.Reimplantation followed by restoration was performed 8months later.The quality of regenerated bone following SD-FDBA grafting was adequate for osseointegration and longterm implant success.The excellent osteogenic properties of SD-FDBA are attributed to its human origin,cortical bone-like structure,partly demineralized surfaces and bone morphogenetic protein-2-containing nature.Further investigation with more cases and longer follow-up was required to confirm the final clinical effect.

关键词： dental implant implant failure allogeneic bone bone regeneration reimplantation

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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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Stem cell microencapsulation maintains stemness in inflammatory microenvironment

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International Journal of oral Science 2022年第4期14卷 549-560页

作者： Yajun Zhao Yilin Shi Huiqi Yang Mengmeng Liu Lanbo Shen Shengben Zhang Yue Liu Jie Zhu Jing Lan Jianhua Li Shaohua Ge Department of Implantology&Periodontology School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration&Shandong Provincial Clinical Research Center for Oral DiseasesJinanChina Key laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi'an Jiaotong UniversityXi'anChina Airong Plastic Surgery Hospital JinanChina

Maintaining the stemness of the transplanted stem cell spheroids in an inflammatory microenvironment is challenging but important in regenerative medicine. Direct delivery of stem cells to repair periodontal defects may yield suboptimal effects due to the complexity of the periodontal inflammatory environment. Herein, stem cell spheroid is encapsulated by interfacial assembly of metal-phenolic network(MPN) nanofilm to form a stem cell microsphere capsule. Specifically, periodontal ligament stem cells(PDLSCs) spheroid was coated with FeⅢ/tannic acid coordination network to obtain spheroid@[FeⅢ-TA] microcapsules. The formed biodegradable MPN biointerface acted as a cytoprotective barrier and exhibited antioxidative, antibacterial and anti-inflammatory activities, effectively remodeling the inflammatory microenvironment and maintaining the stemness of PDLSCs. The stem cell microencapsulation proposed in this study can be applied to multiple stem cells with various functional metal ion/polyphenol coordination, providing a simple yet efficient delivery strategy for stem cell stemness maintenance in an inflammatory environment toward a better therapeutic outcome.

关键词： inflammatory protective maintain

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Probing the intriguing frictional behavior of hydrogels during alternative sliding velocity cycles

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摩擦:英文版 2023年第12期11卷 2329-2341页

作者： Yiming ZHAO Gang YI Jiuyu CUI Ziqian ZHAO Yonggan YAN Luxing WEI Jinlong SHAO Hongbo ZENG Jun HUANG Key laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education National Demonstration Center for Experimental Mechanical Engineering EducationSchool of Mechanical EngineeringShandong UniversityJinan 250061China shandong Key laboratory of Advanced Organosilicon materials and Technologies Zibo 256401China Department of Chemical and materials engineering University of AlbertaEdmontonAlberta T6G 1H9Canada Department of Periodontology School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue RegenerationJinan 250061China shandong engineering laboratory for dental materials and oral tissue regeneration Jinan 250012China

Understanding the friction behavior of hydrogels is critical for the long-term stability of hydrogelrelated bioengineering applications.Instead of maintaining a constant sliding velocity,the actual motion of bio-components(e.g.,articular cartilage and cornea)often changes abruptly.Therefore,it is important to study the frictional properties of hydrogels serving under various sliding velocities.In this work,an unexpected low friction regime(friction coefficientμengineering applications such as artificial cartilage.

关键词： hydrogel friction alternative sliding velocity ultra-low friction coefficient drag reduction

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Periodontitis may induce gut microbiota dysbiosis via salivary microbiota

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International Journal of oral Science 2022年第3期14卷 349-359页

作者： Jun Bao Lili Li Yangheng Zhang Min Wang Faming Chen Shaohua Ge Bin Chen Fuhua Yan Department of Periodontology Nanjing Stomatological HospitalMedical School of Nanjing UniversityNo.30 Zhongyang RoadNanjingChina State Key laboratory of Military Stomatology&National Clinical Research Center for oral Diseases&Shaanxi Clinical Research Center for oral Diseases Department of PeriodontologySchool of StomatologyFourth Military Medical UniversityXi’anChina Department of Periodontology School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinanChina

The aim of this study was to identify whether periodontitis induces gut microbiota dysbiosis via invasion by salivary microbes.First,faecal and salivary samples were collected from periodontally healthy participants(PH group,n=16)and patients with severe periodontitis(SP group,n=21)and analysed by 16S ribosomal RNA sequencing.Significant differences were observed in both the faecal and salivary microbiota between the PH and SP groups.Notably,more saliva-sourced microbes were observed in the faecal samples of the SP group.Then,the remaining salivary microbes were transplanted into C57BL6/J mice(the C-PH group and the C-SP group),and it was found that the composition of the gut microbiota of the C-SP group was significantly different from that of the C-PH group,with Porphyromonadaceae and Fusobacterium being significantly enriched in the C-SP group.In the colon,the C-SP group showed significantly reduced crypt depth and zonula occludens-1 expression.The m RNA expression levels of pro-inflammatory cytokines,chemokines and tight junction proteins were significantly higher in the C-SP group.To further investigate whether salivary bacteria could persist in the intestine,the salivary microbiota was stained with carboxyfluorescein diacetate succinimidyl ester and transplanted into mice.We found that salivary microbes from both the PH group and the SP group could persist in the gut for at least 24 h.Thus,our data demonstrate that periodontitis may induce gut microbiota dysbiosis through the influx of salivary microbes.

关键词： Periodontitis may induce gut microbiota dysbiosis via salivary microbiota

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