OBJEVTIVETo evaluate the effect of different restoration methods on fracture resistance of endodontically treated teeth.

METHODSFifty intact extracted maxillary first premolars were randomly divided into 5 groups. Medial-occlusal cavity models were established in all the test groups (B-E) according to the same standard, followed by treatments with defect exposure only, defect filling with light cured composite resin, indirect resin inlays, or light cured composite resin combined with Biosplint fiber. Each specimen was tested using a universal test machine at 1.00 mm/min until fracture and the fracture load was recorded. The load angle was 45 degree to the long axis of the teeth, and the load was pointed to the middle of the lingual surface on the buccal cusp. The fracture resistance was analyzed statistically.

RESULTSThe mean load to cause fracture of the samples in each group group A to E was 1.27∓0.41, 0.23∓0.17, 0.55∓0.31, 0.89∓0.40, and 0.98∓0.34 kN, respectively, showing significant differences between the groups.

CONCLUSIONThe fracture resistance of the teeth is reduced after endodontic therapy, but can be increased significantly by restoration with composite resin inlay or light cured composite resin combined with Biosplint fiber.

Bicuspid ; physiopathology ; Composite Resins ; chemistry ; Dental Materials ; chemistry ; Dental Restoration, Permanent ; methods ; Dental Stress Analysis ; Humans ; Inlays ; Maxilla ; Tooth Fractures ; physiopathology ; Tooth, Nonvital ; physiopathology ; therapy

Objective To explore the relationship between the levels of Cu, Fe, Mn, Zn in serum and Parkinson disease (PD). Methods A total of 40 patients with PD (PD group) and 40 control subjects (control group)were enrolled in this study. Serum levels of Mn were measured by graphite atomic absorption, and Cu ,Fe, Zn were measured by inductively coupled plasma(ICP)mass spectrometry. Resudts There were significantly increase in the levels of Mn and Fe in PD group than those in control group [(0.269±0.326) μ mol/L vs (0.125±0.054) μmol/L, P< 0.05, (1.512±0.949) μmol/L vs (0.676±0.111) μmol/L, P< 0.01)]. There were no significant difference in the levels of Cu and Zn between two groups (P> 0.05). Condusion Micreelements may play important roles in pathogenesis and development of PD, especially Fe and Mn.

Objective:To investigate the effect of continuous renal replacement therapy (CRRT) based on kidney disease improving global outcomes organization (KDIGO) staging on mononuclear cell microtubule-associated protein 1 light chain 3-Ⅱ (LC3-Ⅱ), autophagy related protein 5 (ATG5) and autophagy genes Beclin-1 in the treatment of patients with acute kidney injury (AKI) and its relationship with prognosis.Methods:Eighty patients who were diagnosed with AKI and treated with CRRT in Shaoxing Central Hospital from January 2019 to December 2020 were selected as the research object. According to the KDIGO-AKI standard, they were divided into stageⅠ(24 cases), stageⅡ(26 cases) and stage Ⅲ (30 cases). The prognosis, general data, autophagy related molecular mRNA levels were compared among the three groups and multivariate Logistic regression was used to analyze the risk factors of the prognosis of patients.Results:The age, CRRT treated time, ICU stay time, mean arterial pressure, blood lactic acid and 24 hlactate clearance rate in three groups had no significant differences ( P>0.05). The levels of LC3-Ⅱ in the three group were 1.13 ± 0.11, 1.47 ± 0.23, 1.66 ± 0.19, and the levels of ATG5 in the three group were 1.24 ± 0.26, 1.48 ± 0.17, 1.62 ± 0.16, the levels of Beclin-1 in three group were 1.23 ± 0.15, 1.51 ± 0.12, 1.71 ± 0.13, there were statistical differences ( P<0.05). The 28 d survival rate and the hospital mortality rate in the three group had significant differences ( P<0.05), the patients in the stage Ⅲ group had lowest 28 d survival rate and highest hospital mortality rate. Multivariate Logistic regression analysis results showed that LC3-Ⅱ, Beclin-1 levels and AKI grading were the risk factors affecting the 28 d survival rate and the hospital mortality rate. Conclusions:Starting CRRT based on KDIGO stage in the treatment of AKI can improve the prognosis of patients, and autophagy factor LC3-Ⅱ, Beclin-1 and AKI stage are risk factors affecting the prognosis of patients.

Based on the characteristics of forensic pathology, this paper explains the concept, connotation and advantages of holistic medicine and integrated medicine in the teaching of forensic pathology. Then, through the introduction of the specific teaching process design and effect analysis of the death cause analysis practical cases, it clarifies the necessity and effectiveness of integrated medicine and holistic medicine in the teaching of forensic pathology, and provides new ideas for the reform of the overall teaching of forensic pathology.

Objective:To investigate the effect and molecular mechanism of tumor necrosis factor-α-inducible protein 8-like 2(TIPE2)on lipopolysaccharide(LPS)or interleukin-4(IL-4)-induced phenotypic switch of adipose tissue macrophages(ATM).Methods:The expression levels of TIPE2, inducible nitric oxide synthase(iNOS), monocyte chemoattractant protein 1(MCP-1), CD206, and arginase 1(Arg-1)in the visceral adipose tissue of obese mice, TIPE2-knockout(KO)mice, and control mice were detected by immunohistochemistry, Western blotting, and real-time PCR(RT-qPCR). Peritoneal macrophages isolated from KO and wild-type mice and RAW 264.7 mouse macrophage cell line were cultured, and then stimulated with LPS(100 ng/mL)or IL-4(20 ng/mL)for 6 hours. The expression levels of TIPE2, iNOS, MCP-1, CD206, and Arg-1 were detected by Western blotting and RT-qPCR.Results:Obese mice showed down-regulated TIPE2 expression, up-regulated pro-inflammatory markers iNOS and MCP-1 expressions, and down-regulated anti-inflammatory markers CD206 and Arg-1 expressions. LPS decreased the expression of TIPE2 in RAW 264.7 cells and peritoneal macrophages from mice, increased the expression of the classically activated macrophages(M1 phenotype)markers iNOS and MCP-1, and decreased the expression of the substituting activated macrophages(M2 phenotype)markers CD206 and Arg-1. IL-4 increased the expression of TIPE2 in RAW 264.7 cells and peritoneal macrophages, decreased the expression of iNOS and MCP-1, and increased the expression of CD206 and Arg-1. During the M1 polarization of macrophages, LPS increased toll-like receptor(TLR4)expression as well as nuclear transcription factor κBα suppressor protein(IκBα) and NF-κB phosphorylations in macrophages. Knockout of TIPE2 further increased the expression of the TLR4/IκBα/NF-κB signaling pathway and M1 macrophage markers, and further reduced the expression of the M2 macrophage markers.Conclusion:TIPE2 regulates ATM phenotypic transformation through inhibition of the TLR4/IκBα/NF-κB signaling pathway, which ameliorates adipose tissue inflammation in obese states.

ObjectiveTo explore the effects of group interpersonal psychotherapy （IPT） on cognitive and social function in patients with first-episode schizophrenia， and to provide references for appropriate psychological treatment for the patients. MethodsA total of 62 patients with first-episode schizophrenia who met the diagnostic criteria of International Classification of Diseases， tenth edition （ICD-10） and were admitted to the Third People's Hospital of Foshan from January to December 2021 were selected as the study objects. And patients were divided into study group and control group according to random number table method， each with 31 cases. Both groups were treated with risperidone for 8 weeks， based on this， study group received group IPT. Before and after 8 weeks of treatment， Positive and Negative Syndrorne Scales （PANSS）， Wisconsin Card Sorting Tests （WCST） and Personal and Social Performance Sale（PSP） were adopted to assess the patients' psychiatric symptoms， cognitive function and social function. ResultsAfter 8 weeks of treatment， there was no significant difference in PANSS scores between the two groups （t=0.296， P>0.05）. The WCST total number of responses in the study group was larger than that in the control group， the number of perseverative errors and non-perseverative errors were smaller than those in the control group， and PSP score of the study group was higher than that of the control group， with statistically significant differences （t=0.398， 2.609， 0.523， 0.381， P<0.05 or 0.01）. ConclusionGroup IPT may have no significant efficacy on alleviating the symptoms of patients with first-episode schizophrenia， but it may help improve the cognitive and social function in patients.

ABSTRACT OBJECTIVE：To establish a method for content determination of paclitaxel in malignant ascites of tumor patients. METHODS：LC-MS/MS method was adopted. Using vindoline as internal standard，the content of paclitaxel in ascites of tumor patients was determined. The separation was performed on Zorbax SB-C18 column with mobile phase consisted of aqueous solution （containing 0.1％ formic acid and 10 mmol/L ammonium acetate）-acetonitrile（40 ∶ 60，V/V）at the flow rate of 0.25 mL/min. the column temperature was 30 ℃，and sample size was 5 μL. The ion source was electrospray ion source，and the detection mode was multiple ion monitoring positive ion mode. MS parameters were set as following as dry gas temperature 350 ℃，dry gas flow rate 10 L/min，capillary voltage 4 000 V. Quantitative determination was operated in the multiple reaction monitoring（MRM）mode， with the ion transitions m/z 876.5→308.0 for paclitaxel and m/z 457.3→188.1 for the internal standard. The fragment voltage/ collision energy for paclitaxel and the internal standard were 250 V/30 eV，and 150 V/20 eV，respectively. RESULTS：The linear range of paclitaxel were 25-2 500 ng/mL（r2＝0.996 5，n＝7）. The lowest limit of quantitation was 25 ng/mL. RSDs of inter-day and intra-day precision tests were 0.61％ -3.62％（n＝5，3）. Accuracies were 95.34％ -98.76％（n＝5，3）. RSDs of extraction recovery were 3.19％-3.72％（n＝3）. CV of matrix effect were 1.52％-2.93％（n＝3）. RE of stability tests were lower than 3％（n＝ 3）. CONCLUSIONS：The method is simple，accurate and suitable for the content determination of paclitaxel in malignant ascites of tumor patients.

Objective To investigate the age-related changes of biomechanical properties for humerus, femur and tibia in male rats and their application values in age estimation. Methods According to different weeks of age, 90 healthy male SD rats were divided into 2, 4, 6, 8, 17, 26, 52, 78 and 104-week groups with 10 rats in eachgroup. After the rats were executed by excessive anesthesia, humerus, femur, and tibia were separated and the attached soft tissues were removed. The length of the above-mentioned bones and the diameter of the middle section (compression site) were measured with vernier caliper, and the three-point bending test was conducted with electronic universal material testing machine to detect the ultimate load and displacement under ultimate load. Results There were significant differences in the ultimate load of humerus, femur and tibia among male rats in different age groups (P<0. 05). With the increase of week age, the ultimate loads of the humerus, femur and tibia increased first and then decreased, and reached the peak value in 52-week age group, showing a strong positive correlation with week age before 52 weeks ( r = 0. 884,0. 933,0. 929, P<0. 05). There was no significant difference in humerus and tibia. The displacement of femur under ultimate load was weakly positively correlated with week age (R= 0. 406,P<0. 05). The age prediction accuracy for automatic linear modeling of ultimate load for humerus, femur, tibia and three above-mentioned bones in rats before 52-week age was 78. 2% , 86. 8% , 84. 1% and 88. 3% , respectively. There was a strong positive correlation between the length of humerus, femur and tibia and the ultimate load (R= 0. 904, 0. 897, 0. 814, P<0. 05). The diameters of humerus, femur and tibia were strongly positively correlated with the ultimate load (R = 0. 759, 0. 814 and 0. 745, P<0. 05). Conclusions The ultimate loads of humerus, femur and tibia in male rats increased first and then decreased with age, and were positively correlated with age before 52 weeks, which could be used for age inference. The highest accuracy of age estimation was ultimate loads of three bones, followed by femur. The length/ middle diameter of humerus, femur and tibia were strongly positively correlated with the ultimate load.