This report presents a case of a 9-year-old child with a complicated crown-root fracture of the maxillary central incisor, accompanied with a root fracture. The treatment strategy was minimally invasive, focusing on vital pulp preservation, root fracture recovery, and crown restoration. The fractured crown was reattached using resin short posts to enhance retention, resulting in aesthetic and functional restoration of the anterior teeth. A 2-year follow-up revealed favorable clinical and radiographic outcomes.
Humans ; Child ; Tooth Fractures/therapy* ; Tooth Root/injuries* ; Incisor/injuries* ; Tooth Crown/injuries* ; Post and Core Technique ; Dental Restoration, Permanent/methods* ; Maxilla

Objective To employ next-generation sequencing(NGS)to analyze differentially expressed mRNAs in the gingival tissue of hypertensive rats with or without periodontitis to provide a theoretical basis for the prevention and treatment of hypertension with periodontitis.Methods After obtaining approval from the Animal Experiment Ethics Committee,a hypertensive rat model was established by administering high-salt feed containing 8％(w/w)NaCl,and a periodontitis rat model was established by ligating the first molar of the mandibular region using 3-0 sterile silk thread.Rat models of the normal control(N),hypertension(H),and hypertension with periodontitis(PH)groups were estab-lished.The blood pressure,heart rate,alveolar bone resorption,and number of osteoclasts in the alveolar bone were measured,before harvesting the gingival tissues from the three groups for NGS to analyze the expression of significantly different genes.Gene ontology(GO)enrichment analysis was performed for all significantly differentially expressed genes between the H and PH groups.Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analysis was per-formed.Key genes were screened by protein-protein interaction(PPI)networks,and the key gene expression in each group was verified using immunohistochemistry(IHC).The expression of key genes in the systemic circulation of each group was analyzed using enzyme-linked immunosorbent assay(ELISA).Results At the end of the experiment(11th week),the blood pressure was higher in both the H and PH groups than that in the N group(P<0.001),but there was no statistically significant difference in blood pressure between the H and PH groups.There was no statistical difference in heart rate among the 3 groups.Micro-CT showed that the distance from the cemento-enamel junction to the alveolar bone crest(CEJ-ABC)of the mandibular first molar in the PH group was significantly higher than that in the N and H groups(P<0.016 7).The number of osteoclasts in the alveolar bone of the PH group was significantly higher than that of the N and H groups(P<0.0167).No common differentially expressed genes were found among the 3 groups.There were 235 significantly differentially expressed genes in the gingival tissue between the H and PH groups,and 137 upreg-ulated genes(e.g.,P-selectin,keratin 16,and S100 calcium binding protein A)and 98 downregulated genes(e.g.,FK506 binding protein 5,mediator complex subunit 22,zinc finger and BTB domain containing 16)in the PH group compared to the H group.GO analysis showed that the major enriched biological processes(BP)were leukocyte migra-tion,the major cellular component(CC)was complex of collagen trimers,and the significant molecular function(MF)was extracellular matrix structural constituent in the H and PH groups.KEGG pathway analysis showed that signaling pathways such as cytokine-cytokine receptor interaction,IL-17 signaling pathway,and TNF-α signaling pathway were significantly enriched in the H and PH groups.PPI analysis identified four key genes affecting periodontitis in hyperten-sive conditions,including interleukin-1β(IL-1β),matrix metalloproteinase-9(MMP-9),collagen type Ⅰ alpha1(COL1α 1),and chemokine ligand 1(CXCL1).Compared to the N and H groups,the expressions of IL-1β and TNF-α were all upregulated in the gingival tissue and systemic serum in the PH group(P<0.016 7).Conclusion The differentially expressed mRNAs in hypertension with or without periodontitis included IL-1β and MMP-9,while the differentially ex-pressed signaling pathways were IL-17 and TNF-α.These results provide a theoretical reference for further investigation of the molecular regulatory mechanism of hypertension with periodontitis in the future.

Objective: In view of the difficulty of the shortage of new coronavirus nucleal acid test in the early COVID-19 outbreak, to explore the application value of chest CT in screening COVID-19 patients. Methods: Retrospective analysis was performed on the data of patients with fever who received chest CT and new coronavirus nucleal acid test during January 25, 2020 to February 2, 2020 in Zhongnan Hospital of Wuhan University. A total of 587 patients were enrolled, including 290 males and 297 females, aged from 11.0 to 96.0 (51.3±17.1) years old. Take the nucleic acid test results as the gold standard, the sensitivity, specificity and rate of missed diagnosis of CT screening COVID-19 were calculated. Results: Among the 587 patients, there were 433 positive cases (73.8%, 433/587) and 154 negative cases (26.2%, 154/587) of novel coronavirus nucleic acid test. Using CT screening, 494 cases (84.2%, 494/587) were positive and 93 cases (15.8%, 93/587) were negative. The sensitivity of CT screening COVID-19 was 97.7% (423/433), specificity was 53.9% (83/154) and rate of missed diagnosis was 2.3% (10/433). Conclusions In the early COVID-19 outbreak, CT screening has the advantages of high sensitivity and low rate of missed diagnosis of COVID-19, which can compensate for the shortage of new coronavirus nucleal acid test and can be used as the basis for rapid screening for early prevention and control of COVID-19 outbreak.

Objective To describe the prevalence and risk factors of insomnia among adults in YiBin City. Meth?ods Using multi-stage stratified cluster sampling, 12000 subjects over 18 years old were identified in YiBin City. The subjects were screened using the insomnia survey self-edited and risk factors of insomnia were identified through logistic analysis. Results A total of 11227 subjects completed the survey in which 1671 people (14.9%, 95%CI:14.2%~15.5%) were diagnosed insomnia using ICD-10. Among them, 9.4% (157 patients) had seeked for professional help. The multi?variate logistic analysis showed that low level of life quality(OR=2.42,P<0.01), jobless(OR=1.87,P<0.01), over 60 years old(OR=1.69,P<0.01), fewer years of education(OR=1.41,P<0.01), female(OR=1.41,P<0.01)and lower annu?al per capita income(OR=1.15,P=0.01)were risk factors in insomnia people. Conclusion The incidence of insomnia is high in YiBin city. Sleep quality in high-risk group needs more attention and corresponding measures should be taken in order to increase the rate of asking for help in insomnia people.

Objective To examine the effect of aqueous extracts of Scutellaria baicalensis Georgi and Radix paeoniae Alba on periodontitis mice and compare the results of the two herbs for the treatment of the periodontitis mice.Methods Sixty-four SPF 12-week-old male Kunming mice were selected and randomly divided into four groups:Control group (C) ;Experimental periodontitis group (P):the peridontitis models in Kunming mice were prepared by wrapping silk ligature and inoculating with putative periodontopathic bacteria; Scutellaria baicalensis Georgi treatment group(SG):periodontitis was induced by the same method described above,the mice were gavaged with Scutellaria baicalensis Georgi; Radix paeoniae Alba treatment group (RG):periodontitis was induced by the same method described above,the mice were gavaged with Radix paeoniae Alba.Four mice were sacrificed at each time point of the end of 4,6,8 and 10 weeks in each group.The histopathological changes of periodontal tissue were observed under microscope with HE staining.The level of serum IgG1 and IgG2a was measured by enzyme-linked immunosorbent assay(ELISA).Results A serious inflammatory response,alveolar progressive absorption and a large number of osteoclasts were observed in the experimental periodontitis group.However,in SG and RG,the inflammation of the periodontal tissue was decreased and tissue repair was significant.The level of serum IgG2a in SG(6 week:0.934 ± 0.006,8 week:0.743 ± 0.009,10 week:0.674 ± 0.008) and RG (6 week:1.023 ± 0.032,8 week:0.851 ± 0.032,10 week:0.790 ± 0.009) was significantly decreased after the mice were gavaged with the two herbs(P ＜ 0.01).The level of serum IgG2a in SG was significantly lower than that of RG(P ＜0.01).The level of serum IgG1 in SG(6 week:0.314 ±0.006,8 week:0.344 ± 0.004,10 week:0.367 ±0.006) and RG(6 week:0.287 ±0.005,8 week:0.303 ±0.058,10 week:0.336 ±0.006) were significantly increased(P ＜ 0.01).The level of serum IgG1 in SG was significantly higher than that of RG (P ＜ 0.0l).Conclusions Both the aqueous extracts of Scutellaria baicalensis Georgi and Radix paeoniae Alba showed therapeutic effect on periodontitis in mice.Scutellaria baicalensis Georgi was more effective than Radix paeoniae Alba.

Objective To investigate the survival condition of the liver transplant recipients and determine the factors which influence the long time survival. Methods Retrospective study of the follow-up data of the orthotopic liver transplantation recipients during 1999-2009 was performed.The survival rate of different primary disease was analyzed respectively. The recurrence of the primary disease, mortality and morbidity was also analyzed. Results 331 recipients were follwed up. The follow-up duration ranged from 8-120 months. The 1-, 3-, 5-, and 10-year survival rate of patients with benign end-stage liver disease was 86 %, 85 %, 83 %, and 83 %, respectively. There was no difference in the long- term survival rate between the patients with hepatitis B virus (HBV)-related cirrhosis and severe liver failure. The 1-, 3-, 5-, and 10-year survival rate of patients with HCC matching Millan criteria was 96 %, 87 %, 87 %, and 87 0%, while those of HCC exceeding Millan criteria were 42 % ,26 % ,24 % ,24 % resepectively. There was significant difference between them at the same period (P＜0. 01). The total recurrent rate of HCC recipient was 54. 3 %, and that of HCC matching and exceeding Millan criteria was 4.3 % and 72. 7 0% respectively (P＜0. 01 ). Tumor recurrence was the main cause of death of the malignancy. The HBV recurrent rate was 6. 0 0%, and all the cases were controlled by changing the antivirus regimen. The morbidity of billiary complication was 11.8 %, and intrahepatic biliary stricture was the most common type. CNIs-related renal impairment morbidity was 8. 2 % and the damage was reversible in condition of early diagnosis and treatment. Conclusion Orthotopic liver transplantation is an effective and safe treatment for end stage liver disease. The LTx recipients can get long time survival with perfect quallity life under proper medical supervision.

Objective To investigate the expressions of PI3K, AKT and MRP protein in pancreatic carcinoma and to determine the clinicopathological significance and the correlation among three protein expressions. Methods The immunohistochemical method was used to detect the expressions of PI3K, AKT and MRP in forty three pancreatic carcinoma, nine chronic pancreatitis and eight normal pancreatic tissue samples. Results The positive expression rates of PI3K, AKT and MRP were 46.51%, 55.81% and 39.53%, respectively in pancreatic carcinoma, which were remarkably higher than those in normal pancreatic tissue and in chronic pancreatitis (P<0.01 and P<0.05, respectively). The aberrant expression of PI3K, AKT and MRP were associated with lymph node metastasis and TNM stages (P<0.05). The abnormal expression rate in both MRP and PI3K was 32.56%, the normal expression rate of both MRP and PI3K was 46.51%, and there was positive correlation between the expression of MRP and PI3K(r=0.581, P<0.01). The abnormal expression rate of both MRP and AKT was 32.56%, the normal expression rate was 37.21%, and there was a positive correlation between MRP and PI3K (r=0.432,P<0.05). The abnormal expression rate of both MRP and PI3K was 37.21%, the normal expression rate of both MRP and PI3K was 32.56%, there was also a positive correlation between MRP and PI3K (r=0.306,P<0.05). Conclusions The expressions of PI3K, AKT and MRP were up-regulated in pancreatic carcinoma. The expressions of PI3K and AKT may be related to the lymph node metastasis and TNM staging.

TF no-mix orthodontic adhesive was compounded in different weight proportion of nanograde hydroxyapatite as 10%, 20% and 30%, for use in this comparative study on composites. 80 orthodontic brackets were cemented and divided into 8 experimental groups, and TF adhesive was set as the control group. The tensile strength and shear strength were tested respectively. The results showed that the group of 10% nanograde hydroxyapatite obtained the greatest bonding strength (9.668 +/- 1.0649 MPa in tensile strength and 11.991 +/- 1.4135 MPa in shear strength), and there was significant difference between the 10% group and the other groups (P < 0.05, one-way ANAOV). It is concluded that the bonding strength can be enhanced when TF adhesive is compounded in suitable proportion of nanograde hydroxyapatitie.
Animals ; Cattle ; Dental Bonding ; Dental Cements ; chemistry ; Durapatite ; chemistry ; In Vitro Techniques ; Particle Size ; Tensile Strength

0.05).Myocardial perfusion defect scores were decreased significantly from 14.8?3.0 to 10.5?1.8(P