OBJECTIVES: This study aimed to evaluate and analyze the current situation of dentists in Guangdong pro-vince regarding the management of avulsed incisors, thereby providing a reference for making treatment strategies for avulsed incisors in the future. METHODS: A total of 712 dentists with different educational backgrounds and working conditions in Guangdong province were randomly selected to conduct an online questionnaire survey on the cognition of children with avulsed incisors from April 2022 to May 2022. The data were recorded by Excel software and statistics were analyzed on Stata/SE 15.1. RESULTS: A total of 712 dentists were investigated and 701 questionnaires were collected (98.46%). In addition, 65.9% of investigators came from the Department of Stomatology in a First-class Hospital or Stomatological Hospital. The results showed that the average number of avulsed teeth consulted by dentists was less than 20 per year. Although 99.7% of respondents considered normal saline as a suitable storage medium, 3.1% and 23.8% of them had a misunderstanding that the tap/alcohol could be used for root cleaning. Moreover, 93.4% was the correct selection rate of the treatment plan for processing on root surfaces before replanting by investigators. The correct selection rate of the duration using elastic fixation was only 10.7%. Meanwhile, 42.9% of investigators refused to inoculate tetanus immunoglobulin after teeth replanting. Emergency management of dental avulsion (EM) and clinical management of dental avulsion (CM) answered correctly with average scores of 14.60±11.85 and 14.48±2.67, respectively. Multivariate linear regression analysis revealed that working years were negatively correlated with EM and CM scores (P<0.05). There was a positive correlation between CM and EM scores with the number of avulsion cases treated by physicians each year (P<0.05). In terms of the EM score of dentists' learning attitude, investigators who had received enough knowledge were higher than those who had not and insufficient knowledge reserved, and the difference was statistically significant (P<0.05). The scores of investigators who thought they had a certain degree of knowledge about dental trauma were higher than those who thought they "did not understand", and the difference was statistically significant (P<0.05). In terms of CM scores, investigators who thought the knowledge of dental trauma was "very helpful" had higher scores than those who thought it was "not helpful", and the difference was statistically significant (P<0.05). The scores of the investigators who thought they had "relatively sufficient knowledge" of dental trauma were higher than those who thought they had "no knowledge" or "insufficient know-ledge", and the difference was statistically significant (P<0.05). CONCLUSIONS The overall accuracy of the management of avulsed incisors among dentists was low in Guangdong province. Dentists were more likely to have a higher rate of accuracy choice in treatment options for luxation injury and avulsion to enhance the prognosis of replanted teeth.
Humans ; Child ; Tooth Avulsion/therapy* ; Incisor ; Tooth Replantation/methods* ; Surveys and Questionnaires ; Dentists ; Cognition ; China ; Health Knowledge, Attitudes, Practice

OBJECTIVE: To characterize the silver in chitosan antibacterial gel, and to establish a method for the determination of silver content in samples. METHODS: The silver in the samples was analysed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and single particle inductively coupled plasma mass spectrometry (SP-ICP-MS). Microwave digestion was adopted to digest the chitosan antibacterial gel, and then the content of silver was determined by flame atomic absorption spectrometry. RESULTS: The analysises showed that the particle size of silver in chitosan antibacterial gel was about 150~ 200 nm. The silver showed good linearity in the concentration range of 25~250 μg/L (y=0.000 35x+0.001 7, r=0.999 9). The recovery rate (n=9) was 98.5%. CONCLUSIONS SEM, EDS and SP-ICP-MS can be used for the characterization of silver particles in chitosan antibacterial gel. Microwave digestion-flame atomic absorption spectrophotometry method is simple, practicable, high precision and high quantitative accuracy, which is suitable for the quantitative analysis of silver in chitosan antibacterial gel.
Anti-Bacterial Agents/pharmacology* ; Chitosan/chemistry* ; Microwaves ; Particle Size ; Silver

OBJECTIVETo explore the therapeutic effects of minimally invasive anatomic plate fixation for the treatment of the distal tibial fractures.

METHODSFrom February 2006 to March 2009,87 patients with distal tibial fractures were retrospectively analyzed and divided into four groups. Thirty-five patients in group A were treated by closed reduction internal fixation, including 25 males and 10 females,with a mean age of (34.12 +/- 7.10) years. Eleven patients in Group B were treated by closed reduction and locking compression plating fixation,including 8 males and 3 females with a mean age of (29.03 +/- 4.12) years. Twenty-six patients in Group C were treated by open reduction and internal fixation, including 15 males and 11 females, with a mean age of (31.07 +/- 6.31) years. Fifteen patients in Group D were treated by open reduction and locking compression plating fixation, including 9 males and 6 females with a mean age of (30.27 +/- 6.52) years. The index such as operating time, blood loss, hospital stay,hospital expense,fracture healing time, the last follow-up AOFAS score and complications were compared.

RESULTSAll the patients were followed up for 16 to 48 months with a mean time of (24.6 +/- 2.2) months. There were no significant differences in operating time, the last follow-up AOFAS score among four groups (P > 0.05); but blood loss, hospital stay and fracture healing time in group A and B were less than group C and D (P < 0.05); The hospital expenses in group A and C were less than group B and D (P < 0.05).

CONCLUSIONMinimally invasive percutaneous anatomic plate fixation is beneficial for distal tibial fracture, which has minimally invasive, less hospital stay, less hospital expense especially combined with anatomic plate.

Adult ; Bone Plates ; Case-Control Studies ; Female ; Fracture Fixation, Internal ; instrumentation ; methods ; Humans ; Internal Fixators ; Male ; Middle Aged ; Minimally Invasive Surgical Procedures ; instrumentation ; methods ; Retrospective Studies ; Tibial Fractures ; surgery ; Young Adult

In order to investigate the susceptible factors of posttraumatic epilepsy (PTE) and the surgical treatment, the relative factors of 18 cases of intractable PTE and 35 cases of non-PTE patients with posttraumatic seizures (PTS) and the surgical treatment of PTE patients were studied retrospectively. The results showed that there was significant difference in the degree of unconsciousness after head injury, incidence of intracerebral hematoma and acute subdural hematoma between PTE group and non-PTE group. Of the 18 cases of PTE undergoing surgical treatment, the effectiveness of 11 cases was satisfactory and that of the remaining 7 was not. Between the two groups, there was difference in the localization of interictal epileptic discharge (IED) and ictal discharge (ID) as demonstrated by preoperative EEG. It was concluded that PTE was associated with the severity of head injury and intracranial hematoma. The localization of epileptogenic loci by preoperative EEG presumably contributed to the PTE surgical effects.
Adolescent ; Adult ; Aged ; Brain Injuries ; complications ; Child ; Electroencephalography ; Epilepsy ; etiology ; surgery ; Female ; Humans ; Intracranial Hemorrhage, Traumatic ; complications ; Male ; Middle Aged ; Retrospective Studies ; Tomography, Emission-Computed, Single-Photon ; Treatment Outcome

BackgroundThere are differences in executive function between major depressive episode patients with or without psychotic symptoms， and childhood trauma may affect the executive function of patients with major depressive episode. Previous research studies predominantly focused on adult patients with major depressive episode， with a lack of studies specifically focusing on adolescent patients with major depressive episode. ObjectiveTo investigate the differences in executive function among adolescent patients with major depressive episode， with or without psychotic symptoms and childhood trauma. MethodsA total of 112 hospitalized adolescent patients with major depressive episode who met the criteria of the International Classification of Diseases， tenth edition （ICD-10） were included in the study. The participants were recruited from the Department of Child and Adolescent Psychiatry， Shenzhen Kangning Hospital during the period from August 2020 to November 2021. Additionally， 27 healthy controls were recruited through public advertisements. The Cambridge Neuropsychological Test Automated Battery （CANTAB） was used to assess executive function through the administration of the Motor Screening Task （MOT）， Spatial Working Memory（SWM） and Rapid Visual Information Processing （RVP） modules. Childhood Trauma Questionnaire-Short Form （CTQ-SF） was used to assess the trauma type. ResultsCompared with healthy controls， adolescent patients with major depressive episode had a longer mean delay （Z=-3.407， P=0.001） in the MOT task. In the SWM task， the patients had a higher total number of intergroup error responses （Z=-3.291， P=0.001）， a higher total number of intragroup error responses （Z=-3.461， P=0.001）， more total number of double error responses （Z=-3.218， P=0.001）， a higher total error responses （Z=-3.312， P=0.001）， higher strategy scores （Z=-2.437， P=0.015） and longer average delay time （Z=-2.055， P=0.040）. In the RVP task， the patients had fewer hits （Z=-3.196， P=0.001）， more misses （Z=-3.179， P=0.001）， fewer rejections （Z=-2.772， P=0.006）， lower hit probability （Z=-3.187， P=0.001） and lower A´ scores （Z=-3.070， P=0.002）.Compared with adolescent patients with major depressive episode without psychotic symptoms， those with psychotic symptoms had a lower total number of double error responses （Z=-2.566， P=0.010） in SWM task. Compared with adolescent patients with major depressive episode who did not experience emotional neglect， those who experienced emotional neglect had longer average delay time （Z=-3.183， P=0.001） in MOT task， fewer total hits （Z=-2.445， P=0.014）， more total missed reports （Z=-2.467， P=0.014）， lower hit probability （Z=-2.445， P=0.014） and lower A´scores （Z=-2.089， P=0.037） in RVP task. Adolescent patients with major depressive episode who had experienced emotional abuse had longer average delay time in MOT task than those who had not experienced emotional abuse （Z=-2.552， P=0.011）. ConclusionAdolescent patients with major depressive episode exhibit abnormalities in a majority of executive function domains. Specifically， those without psychotic symptoms and with childhood trauma demonstrate significantly impaired executive function. ［Funded by Shenzhen Fund for Guangdong Provincial High-level Clinical Key Specialties （number， SZGS013）， Basic and Applied Basic Research Fund of Guangdong Province （number， 2019A1515110047）， Shenzhen Science and Technology Planning Project （number， JCYJ20190809155019338）］

Hyperbaric oxygen therapy is a method of breathing pure oxygen or high-concentration oxygen in a highpressure environment to treat hypoxic diseases and related diseases. According to clinical verification, this therapy has an irreplaceable effect on certain diseases and has gradually become a comprehensive clinical treatment. One of the main methods of certain diseases is widely recognized by the medical field at home and abroad. The development history, treatment principles, key technologies, and future development trends of hyperbaric oxygen are discussed in detail, provide a research direction for the development of hyperbaric oxygen therapy in the future, and at the same time, it has also improved physicians' awareness of hyperbaric oxygen therapy, so as to improving Industry influence.
Hyperbaric Oxygenation ; Oxygen/therapeutic use* ; Research Design

OBJECTIVETo observe the status of iron deposition in patient with β thalassemia major, and to formulate appropriate treatment strategies.

METHODThe data of status of transfusion and chelation in 135 patients aged from 6 years and 4 months to 17 years and 11 months with β thalassemia major were collected and analyzed. Serum ferritin levels were determined and cardiac and hepatic iron deposition was determined using MRI T2(*) technology.

RESULTOf the 135 cases studied, 66 were male, and 69 were female, their average age was 12.1 years. Serum ferritin (SF) was determined for 111 cases, it varied from 1 086.8 µg/L to 15 011.5 µg/L. Among them, 16 cases had SF level <2 000 µg/L (14.5%) , in 41 cases SF were between 2 000 and 4 000 µg/L (36.0%) ;in 54 cases SF >4 000 µg/L (48.7%) . Liver MRI T2(*) results showed that in only 8 cases (5.9%) iron content in the liver was in normal range, 19 cases (14.9%) showed mild liver iron deposition;34 (25.2%) moderate and 74 (54.8%, the youngest one was only 6 years and 4 months of age) had severe iron deposition respectively. Cardiac MRI T2(*) showed that in 89 cases (65.9%) iron content in the heart was in normal range;19 cases (14.1%) had mild cardiac iron deposition and 27 (20.0%) presented severe iron deposition (the youngest one was only 9 years and 3 months of age) . SF level was obviously related to liver and cardiac iron deposition (MRI T2(*)) r and P value were -0.284, 0.003 and -0.374, 0.000 respectively. In 108 cases regular transfusion and chelation were delayed due to financial problem. The late and insufficient dosage administered and irregular chelation caused the higher SF level and the severe iron deposition.

CONCLUSIONThe survival status of β thalassemia major in China is worrisome. Majority of them had not received regular transfusion and chelation. Liver and cardiac iron deposition occur early and had a high incidence.

Adolescent ; Child ; Female ; Ferritins ; blood ; Humans ; Iron ; metabolism ; Iron Chelating Agents ; adverse effects ; therapeutic use ; Iron Overload ; epidemiology ; etiology ; Liver ; metabolism ; Magnetic Resonance Imaging ; Male ; Myocardium ; metabolism ; Radiography ; Retrospective Studies ; Transfusion Reaction ; beta-Thalassemia ; diagnostic imaging ; metabolism ; therapy

OBJECTIVE: To analyze the difference between the cognitive and control ability and the responsibility in forensic psychiatry evaluation. METHODS: To compare the results of the responsibility evaluation from 2001.1 to 2006.10 (the first period) with that of the cognitive and control ability evaluation from 2006.11 to 2010.10 (the second period). The admissibility opinions on court judgment and evaluation were investigated by return visit. The legal professions' opinions on forensic psychiatric issues from the police office, the procuratorate, the court, and the judiciary were investigated. RESULTS: There was no significant difference of the criminal types between two periods (P > 0.05). There was significant difference of the diagnostic types between two periods (P < 0.05). The proportion of normal range and part loss of the cognitive and control ability in the second period were higher than that in the first period, but the proportion of complete loss of the cognitive and control ability in the second period was lower than that in the first period (P < 0.05). Among the legal professions, 70.5% of them thought that "the evaluation of cognitive and control ability" was different from "the evaluation of criminal responsibility" and 94.9% of them thought that "to confirm the influence of the forensic psychiatric evaluation of mental disorder on the crime behavior" or "to assess of cognitive and control ability" met requirements of normative judicial expertise. CONCLUSION The evaluation of cognitive and control ability is more aligned with legal requirements and behavioral norms of own subject than the evaluation of responsibility.
Crime/psychology* ; Expert Testimony ; Forensic Psychiatry ; Humans ; Insanity Defense ; Mental Competency ; Mental Disorders/psychology*

Objective::To observe the effect of Shenling Baizhusan(SBS)on the mammalian target of rapamycin complex 1 (mTORC1)/signal transducers and activators of transcription 3 (STAT3) pathway in liver hepatocyte of nonalcoholic fatty liver disease(NAFLD)rats induced by high fat diet, in order to reveal the mechanism of SBS against rat NAFLD from the perspective of inflammation. Method::Totally 80 SD rats were randomly divided into 4 groups, normal control group, model group, high-dose SBP group(30 g·kg^-1), and low-dose SBS group(10 g·kg^-1), with 20 rats in each group. The rats of NAFLD model were established by being fed with high-fat diets for 8 weeks, and the treatment groups were fed with high or low dose of SBS respectively. After treatment for 8 weeks, blood and liver samples of rats were collected. Alanine aminotransferase (ALT), aspartate aminotransferase(AST), total cholesterol (TC), triglyceride(TG), high-density lipoprotein cholesterol(HDL-C)and low-density lipoprotein cholesterol(LDL-C)levels in blood serum were detected with automatic biochemical analyzer. The liver tissues were observed by oil red O and hematoxylin-eosin (HE) staining. Hepatocytes were isolated by type Ⅳ collagenase perfusion in vitro. Tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-5 and IL-6 in hepatocytes were detected by enzyme-linked immunosorbent assay (ELISA), and the relevant gene and proteins expressions of mTORC1 and STAT3 in hepatocytes were detected by Real-time fluorescent quantitative polymerase chain reaction (Real-time PCR) and Western blot detection respectively. Result::Compared with the normal control group, the serum levels of TG, TC, AST, ALT and LDL-C were increased significantly, the levels of TNF-α, IL-1β, IL-5 and IL-6 in hepatocytes were increased significantly, and the expression levels of mTORC1, STAT3 mRNA and proteins in hepatocytes were increased significantly(P<0.01). Compared with the model group, the hepatic lipid accumulation of the medicine intervention group was relieved significantly, the serum levels of AST, ALT, TG and LDL-C were decreased significantly, the expression levels of TNF-α, IL-1β, IL-5 and IL-6 of hepatocytes were decreased significantly, and the expressions of mTORC1, STAT3 mRNA and proteins in hepatocytes were decreased significantly(P<0.05, P<0.01). In the high-dose SBS group, the effects in improving the lipid accumulation and inhibiting the inflammatory reaction were better than those of the low-dose SBS group, and the expressions of mTORC1 and STAT3 genes and proteins in hepatocytes were significantly decreased (P<0.05, P<0.01). Conclusion::SBS can improve the fat metabolism disorder and reduce liver lipid accumulation and inflammatory reaction in NAFLD rats induced by high-fat diet. The mechanism may be correlated with the inhibition of mTORC1/STAT3 pathway relating to genes and protein expression in hepatocytes.