Cemental tear is a rare and indetectable condition unless obvious clinical signs present with the involvement of surrounding periodontal and periapical tissues. Due to its clinical manifestations similar to common dental issues, such as vertical root fracture, primary endodontic diseases, and periodontal diseases, as well as the low awareness of cemental tear for clinicians, misdiagnosis often occurs. The critical principle for cemental tear treatment is to remove torn fragments, and overlooking fragments leads to futile therapy, which could deteriorate the conditions of the affected teeth. Therefore, accurate diagnosis and subsequent appropriate interventions are vital for managing cemental tear. Novel diagnostic tools, including cone-beam computed tomography (CBCT), microscopes, and enamel matrix derivatives, have improved early detection and management, enhancing tooth retention. The implementation of standardized diagnostic criteria and treatment protocols, combined with improved clinical awareness among dental professionals, serves to mitigate risks of diagnostic errors and suboptimal therapeutic interventions. This expert consensus reviewed the epidemiology, pathogenesis, potential predisposing factors, clinical manifestations, diagnosis, differential diagnosis, treatment, and prognosis of cemental tear, aiming to provide a clinical guideline and facilitate clinicians to have a better understanding of cemental tear.
Humans ; Dental Cementum/injuries* ; Consensus ; Diagnosis, Differential ; Cone-Beam Computed Tomography ; Tooth Fractures/therapy*

Objective:To discuss the association between occupational acid fog exposure and accelerated biological aging of the workers,and to clarify its related risk factors.Methods:A total of 341 male workers exposed to occupational acid fog and 201 male workers without occupational exposure were selected as the study subjects,and they were divided into exposure group and control group,respectively.The general informations of the subjects in two groups were collected through questionnaires and physical examinations.The levels of red blood cell count(RBC),platelet count(PLT),albumin(ALB),urea(Urea),creatinine(CR),triglycerides(TG),total cholesterol(TC),glycated hemoglobin(HBA1c),and high-sensitivity C-reactive protein(Hs-CRP)in serum of the subjects in two groups were detected.The Klemera-Doubal method(KDM)was used to construct the composite aging measure,KDM-biological age(BA)(KDM-BA).The model parameters were trained using samples from the 2009 China Health and Nutrition Survey(CHNS)Database to calculate the BA acceleration of the subjects in two groups;stratified analysis based on the population characteristics was conducted to analyze the BA of the subjects in two groups with different population characteristics;generalized linear model was used to analyze the factors influencing BA acceleration due to acid fog exposure.Results:The model parameters were trained using samples from the 2009 CHNS Database,including 8 133 cases aged 20-79 years,of which 3 788 were male.The levels of Urea,CR,HBA1c,ALB,and TC,as well as systolic blood pressure(SBP),total working years,sleep duration,and body mass index(BMI)of the subjects between two groups had significant differences(P<0.05).Compared with control group,the BA acceleration of the subjects in exposure group was significantly increased(P<0.05).In entire population and exposure group,the BA acceleration in the smokers was significantly higher than that in the non-smokers(P<0.05).In entire population,control group,and exposure group,the BA accelerations of the subjects in different BMI groups were significantly decreased with the increase of BMI(P<0.05).Compared with control group,the BA acceleration of the subjects in exposure group was significantly increased(P<0.05),including those under 40 years old,with total working years of 4-7 years,Han nationality,unmarried,smokers,and sleep duration 6-7 h,and with overweight.Acid fog exposure,smoking,and BMI were associated with the BA acceleration(β=0.72,95%CI:0.24-1.21;β=0.59,95%CI:0.11-1.06;β=-0.29,95%CI:-0.35—-0.22).Conclusion:Occupational acid fog exposure may accelerate the biological aging in the workers,and acid fog is a risk factor to accelerate the biological aging of the body.

Objective·To investigate the effect of F-box only protein 38(FBXO38)on the ocular melanoma proliferation and the potential regulatory pathway.Methods·Human skin cutaneous melanoma A375 and human uveal melanoma OMM2.3 cell lines with FBXO38 knockdown and overexpression were constructed by FBXO38 short hairpin RNA(shRNA)and FBXO38 overexpression plasmids respectively.Knockdown and overexpression efficiency of FBXO38 at transcription and protein levels were verified by using quantitative real-time PCR(qRT-PCR)and Western blotting.The effects of FBXO38 on melanoma cell proliferation were detected through clonal formation assay,BrdU immunofluorescence staining and CCK8 cell proliferation assay.By using The Cancer Genome Atlas(TCGA)database,differentially expressed genes were analyzed in the high and low expression groups of FBXO38.Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment was performed to reveal the signaling pathways associated with FBXO38.CCK8 cell proliferation assay was used to detect the inhibition rates of the signaling pathway inhibitors on cells with different FBXO38 expression levels.qRT-PCR and Western blotting were used to detect whether the signaling pathway was activated after knocking down FBXO38.Results·qRT-PCR and Western blotting verified that mRNA and protein expression levels of FBXO38 in FBXO38 knockdown A375 and OMM2.3 cell lines decreased compared with the control group,while the expression levels of FBXO38 in the overexpression cell lines increased compared with wild type group(P＜0.05).Clonal formation assay,BrdU immunofluorescence staining and CCK8 cell proliferation assay showed that FBXO38 knockdown significantly enhanced the proliferation of A375 and OMM2.3 cells(P＜0.05),while overexpression of FBXO38 inhibited melanoma cell proliferation(P＜0.05).Enrichment analysis showed that in skin cutaneous melanoma and uveal melanoma,FBXO38 expression influenced the phosphoinositide 3-kinase/protein kinase B(PI3K-Akt)pathway activation.Compared with those in the control group,the inhibition rates of P13K inhibitor LY294002 and mTOR1 inhibitor Everolimus in the FBXO38 knockdown group significantly improved(P＜0.05),while their inhibition rates of the overexpression group significantly decreased compared with those of control cells(P＜0.05).Western blotting results showed that after knocking down FBXO38,expression levels of PTEN,P21 and P53 proteins decreased,while expression level of MDM2 protein increased.The qRT-PCR results showed a significant decrease in P53 transcription level(P＜0.05)and a significant increase in MDM2 transcription level in FBXO38 knockdown cells(P＜0.05).Conclusion·FBXO38 plays a role in regulating the proliferation of ocular melanoma,and this regulatory effect is related to the PI3K-Akt signaling pathway.

Objective:To investigate the association between dietary intake and physical activity category and their combined effects on all-cause and cause-specific mortality risk in patients with type 2 diabetes mellitus (T2DM).Methods:Between December 2013 and December 2021, a prospective cohort study was conducted on 19 863 T2DM patients in Changshu City, Qingjiangpu District (formerly Qinghe District), and Huai'an District, included in the national basic health service management. Information on deaths and underlying causes of death was obtained from the Jiangsu Provincial CDC and Prevention Death Surveillance System. Cox proportional hazards models were used to estimate the intensity of associations between dietary intake, physical activity, and their combined effects with all-cause and cause-specific mortality in patients with T2DM.Results:As of December 31, 2021, the research subjects had been followed up for 150 283 person-years, with a median follow-up time of 8.15 years. During the follow-up period, 3 293 people died, including 1 124 deaths from cardiovascular disease (CVD) and 875 deaths from cancer. Cox regression analysis showed that compared with the population of 0-1 recommended food group, those having more than five recommended food groups had a 19% lower risk of all-cause mortality [hazard ratio ( HR)=0.81, 95% CI: 0.70-0.94] and a 33% lower risk of all-cause mortality ( HR=0.67, 95% CI: 0.52-0.87). Compared with the T2DM population in the physical activity Q1 group, the risk of all-cause mortality, CVD mortality, and cancer mortality among the physical activity Q4 group reduced by 50% ( HR=0.50, 95% CI: 0.45-0.56), 50% ( HR=0.50, 95% CI: 0.41-0.61), and 27% ( HR=0.73, 95% CI: 0.60-0.88), respectively. The combined effect showed that compared with the population in the intake of food categories 0-2 and low physical activity groups, the risk of all-cause, CVD mortality, and cancer mortality in the intake of food categories 4-9 and high physical activity groups reduced by 55% ( HR=0.45, 95% CI: 0.38-0.53), 56% ( HR=0.44, 95% CI: 0.32-0.59), and 40% ( HR=0.60, 95% CI: 0.44-0.82), respectively. Conclusion:Type of dietary intake, physical activity, and their combined effects are associated with a reduced mortality risk in patients with T2DM.

Objective:The present study was designed to strengthen the education of research integrity, and to improve the awareness of academic misconduct and academic literacy of medical post-graduate students.Methods:A questionnaire survey was conducted with master post-graduate students of a university affiliated hospital, and statistical analysis on the education of research integrity and the perception of academic misconduct among the survey respondents was performed.Results:Academic master post-graduate students′ cognitions of the misconduct in scientific research process and overall academic misconduct were better than that of professional master post-graduate students, and there were significant differences ( P<0.05). The more times of participation in research integrity training, the better cognition of misconduct of scientific research process, research results publication process, and overall academic misconduct, with significant differences ( P<0.05). Conclusions:The education on scientific research integrity of medical post-graduates should be carried out systematically, while the content should be improved and the form should be enriched for scientific research integrity education, so that the medical post-graduates can have a deeper understanding of the code of academic practices, and an education model of scientific research integrity for medical post-graduate which is suitable for China′s national conditions can be gradually developed.

Objective:To analyze the research hotspots and frontiers of hospital research management research from 1981 to 2022.Methods:The relevant literature in the field of hospital scientific research management was retrieved from the CNKI database to explore the trends of publications in this research field. A scientific knowledge graph was drawn and a visualization analysis of the information of authors, issuing units, and research institutions were conducted by Cite Space.5.8.R3.Research hotspots were discussed based on keyword emergence, cluster analysis, and keyword time zone graph.Results:The publication trend in this field was generally policy-oriented, but the cooperation among authors and institutions was relatively loose, and the research hotspots were gradually shifting from scientific research funding management to discipline construction, talent training, translational medicine, and informatization. Cluster analysis found that the main content of hospital scientific research management was scientific research funding and clinical scientific research management and the main management objects were the medical and nursing staff.Conclusions:Hospital scientific research managers must adhere to the policy-oriented approach, strengthen the cooperation and exchanges in scientific research management, innovate the scientific research management mode around the research hotspots and development trends, and promote the quality and efficiency of scientific research management.

Objective:By analyzing the biomedical papers retracted due to the reason that " original data not provided" , to discuss the necessity of preventing scientific data misconduct and the feasible solutions for its management.Methods:Data of the international papers that were published from Jan 2011 to Dec 2021 and retracted due to " original data not provided" were retrieved from Retraction Watch Database. The data of time distribution, institution, journal sources, reasons for retraction, and disciplinary distribution were statistically analyzed and visually processed by using software packages of Excel, Python 3.7, Gephi 0.92.Results:A total number of 529 papers published in the biomedical field were retracted due to " original data not provided" , and the time of publication and retraction occurred mainly in 2019 (27.41%) and 2021 (41.97%). In addition to the reason " original data not provided" used as search term, the reasons for withdrawal were mainly data and image problems caused by scientific data misconduct, and reasons related to the discovery and investigation process of the paper, and these reasons had a strong co-linear relationship. Besides, the 4 disciplinary of biology-cellular, biology-cancer, genetics, medicine-oncology also had a strong co-linear relationship.Conclusions:It is necessary to incorporating scientific research data management into the scientific research code of conduct, strengthen the training on the code of conduct for original scientific research records keeping, establish the scientific research data review mechanism, and promote the prevention and governance of scientific research data misconduct in the biomedical field.

Objective:To explore the effect of digital technology in the surgical treatment of patients with fronto-orbital fibrous dysplasia.Methods:The clinical data of 2 patients with fronto-orbital fibrous dysplasia admitted to the Plastic Surgery Hospital, Chinese Academy of Medical Sciences in February 2016 and February 2018 were retrospectively analyzed. The patients were both male, aged 18 and 16 years, respectively. Preoperative CT scan was performed on the patient to obtain imaging data, imported into Mimics 10.01 for three-dimensional(3D) reconstruction and image analysis of the skull, and the resection range of fibrous dysplasia lesions was designed. Then, the 3D skull defect model was 3D printed, and a personality covering the skull defect was made. Titanium prosthesis was used, and then the bone extraction range of the autologous skull outer plate was designed and simulated to repair the orbital bone defect. Surgery was performed according to the design plan. Postoperatively, the recovery and complications of the patients were observed, skull CT scan was performed, orbital volume, proptosis was measured, visual acuity was checked, and the surgical effect was evaluated.Results:The intraoperative macroscopic lesion boundary in 2 patients was consistent with the preoperative simulation design, and the intraoperative temporal bone was normal bone. One patient recovered well after the operation, and the other had cerebrospinal fluid rhinorrhea 1 day after the operation, without special treatment, and recovered spontaneously after 2 weeks. CT scans after the operation showed that the personalized prosthesis was well integrated with the skull, and the shape of the fronto-orbital area was satisfactory, which was close to the normal anatomical shape. The orbital volume of the affected side of 2 cases was enlarged after operation, which increased by 2.99 ml and 9.99 ml respectively compared with that before operation; the exophthalmos were improved after operation, and decreased by 3.32 mm and 5.11 mm respectively compared with that before operation. Directional movement is good. Patients and their families were satisfied with the morphology.Conclusions:The use of digital technology in the preoperative simulation design of fronto-orbital fibrous dysplasia is helpful for the operator to accurately formulate the surgical plan, improve the utilization efficiency of the grafted bone, and obtain satisfactory postoperative results.

Voluntary service spirit is highly coupled with medical humanistic spirit. Participating in voluntary service is an important channel for medical students to grow up. There are deficiencies in medical students' voluntary service at the social, school and personal levels. It is of great significance to strengthen the top-level design of all staff, whole process and all-round volunteer service, build a volunteer service platform with distinctive characteristics, normal development and multi benefits, create a "school local co construction" volunteer service brand, select advanced figures in voluntary service for medical students, and establish and improve long-term mechanisms for the operation, incentive and guarantee of voluntary services, thus improving the medical students' awareness of voluntary service, protecting their legitimate rights and interests in the service process, expanding the influence of voluntary service and enhancing the effectiveness of voluntary service.

Based on the characteristics of medical specialty, this research group has developed the virtual simulation experiment teaching project of Chinese revolutionary morality (red medicine spirit). This project uses 3D simulation technology and OpenGL technology to build a virtual experimental learning environment based on WebGL, learn general Fu Lianzhang's glorious deeds and immersive experience of the inheritance and development of the spirit of red medicine by contemporary "heroes in harms way" in the fight against the COVID-19 epidemic in the form of 3D animation interaction. Through research, it is found that virtual simulation teaching is conducive to promoting students' understanding and mastery of medical humanities and improving students' satisfaction with teaching, with good popularization value.