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*

Oral microbial community, as an important part of human microbial community, is closely related to oral and general health. Oral microbiological research has become the forefront of international microbiological research. Standardized and unified nomenclature for oral microorganisms in Chinese is of great significance to support the development of oral medicine research. Standardized translation of microbial names is the basis for writing canonical and authoritative professional textbooks and reference books, which helps students to accurately acquire the characteristics and classifications of oral microbes. Unified translation of oral microorganisms is also conducive to academic communication and cooperation, and plays an important role in oral health education and science popularization, which enables oral microbiology knowledge to be accurately disseminated to the public. Therefore, in order to standardize the words in scientific research, funding application, publications, academic exchanges and science popularization within the field of oral medicine, we have fully discussed and revised the Chinese names of oral microorganisms in 2017 edition and ones of newly discovered oral microbes, finally reaching a consensus to form the 2023 edition of Chinese names of oral microorganisms.

Objective:To explore the effect of postoperative delirium risk management in elderly patients with hip fragility fracture based on failure mode and effect analysis (FMEA) theory, and to provide a basis for reducing the incidence of postoperative delirium.Methods:A total of 50 patients admitted to the First Affiliated Hospital of Sun Yat-sen University due to hip fragility fractures from January to December 2019 were selected as the control group, and 50 patients admitted to the First Affiliated Hospital of Sun Yat-sen University for hip fragility fractures from January to December 2020 were selected as the observation group. The control group received routine care, and the observation group implemented risk control intervention measures based on FMEA theory on the basis of the control group. The risk priority number (RPN) value, incidence of delirium, duration of delirium, pain score, satisfaction, and average length of hospital stay were compared between the two groups of patients in each link of failure risk.Results:The RPN values of each link failure risk of the observation group were 100.80 ± 13.39, 103.96 ± 9.96, 103.76 ± 8.04, delirium duration was (36.33 ± 9.07) min, pain scores were 1.86 ± 0.76, 4.16 ± 1.17, average length of stay was (8.98 ± 4.64) days, and incidence of delirium was 6.0% (3/50), the RPN values of each link failure risk of the control group were 274.10 ± 8.48, 291.00 ± 10.10, 287.78 ± 11.64, delirium duration (78.70 ± 20.10) min, pain scores 2.26 ± 1.02, 4.74 ± 1.19, average length of stay was (11.50 ± 7.66) days, and incidence of delirium was 22.0% (11/50). The differences between two groups showed significant differences ( t values were 1.99-93.24, χ2=4.07, P<0.05). The patient satisfaction score of the observation group was 99.36 ± 1.01, which was higher than that of the control group 89.63 ± 2.62, and the difference was statistically significant ( t=24.50, P<0.05). Conclusions:The perioperative implementation of postoperative delirium risk management model based on FMEA theory in elderly patients with hip fractures can reduce the incidence of postoperative delirium, relieve pain, shorten hospital stay, and improve satisfaction degree. It is worthy of clinical promotion.

Gingival recession could result in root exposure, dental hypersensitivity and poor aesthetics. It has been demonstrated that varieties of root coverage procedures can significantly improve gingival recession in short-term (≤6 months), of which coronally advanced flap combined with connective tissue graft is the gold standard technique for treatment of gingival recession. It could obtain the optimally complete root coverage and maintain long-term stability (≥2 years). However, clinical knowledge about the long-term effectiveness of the other alternative graft materials remain very limited. Based on the existing clinical evidence, this article reviews coronally advanced flap, coronally advanced flap combined with connective tissue graft or alternative graft materials, with particular attention to the long-term stability of them, in order to provide reference for the design of further clinical trials and the plan of clinical treatments.

Objective To investigate the effect of local delivery of delta 12-prostaglandinJ2-loaded poly(lactic-co-glycolic acid) (△ 12-PGJ22-NC) on growth factors expression and bone formation.Methods △ 12-PGJ2-NC was prepared by the emulsion solvent diffusion method.The physical and chemical properties of the nanoparticles were evaluated by particle size analysis,transmission electron microscopy,drug-loading ratio and the in vitro release study.Then standardized transcortical defect(5.0 mm × 1.5 mm) was conducted in the femur of 48 male Wistar rats which were randomly divided into four groups(n=12),S,K,F,and N.Thirty microliter of saline(S),unloaded nanoparticles(K),△ 12-PGJ2(F) and △ 12-PGJ2-NC(N) in a collagen vehicle were delivered inside a titanium chamber fixed over the defect.Then,four subgroups were randomly divided in each group named as D3,D7,D14,and D28(n=3) according to the days 3,7,14,and 28 after the surgery.At days 3,7,14,and 28,the mRNA expression of the bone morphogenetic protein-6(BMP-6),platelet-derived growth factor-B(PDGF-B) in defect aera was analyzed by real time quantitive-polymerase chain reaction(qRT-PCR).The protein expression of the BMP-6 and Ephrin-B2 was evaluated by Western blotting.HE staining was employed to reveal new bone formation in weeks 2 and 4.Results △ 12-PGJ2-NC appeared opalescent white and remained relatively stable,with an average particle size of (135.2±0.85) nm.The images from transmission electron microscopy showed that △ 12-PGJ2-NC was spherical in shape and homogeneously distributed.The encapsulation efficiency of △ 12-PGJ2 with the poly(lactic-co-glycolic acid) (PLGA) nanocapsules was about 92％.The in vitro release of △ 12-PGJ2-NC at 37 ℃ showed a sustained fashion and the average accumulated amount was 30％,52％,77％,91％,and 98％ respectively,at 0.5,1,2,4 and 6 h.Compared with the animals treated with saline,after dose of 100 mg/L △ 12-PGJ2 and △ 12-PGJ2-NC apllication,the mRNA expression level of BMP-6,PDGF-B increased significantly(P＜0.05,P＜ 0.001).The protein expression of BMP-6,Ephrin-B2 also was up-regulated.Histomorphometry revealed that new bone formation increased at the same dose of 100 mg/L.But the unloaded nanoparticles did not have the same effect(P＞0.05).Conclusions A stable△ 12-PGJ2 loaded nanoparticle was successfully prepared.△ 12-PGJ2-NC may upregulate the expression of BMP-6,PDGF-B and Ephrin-B2,and promote new bone formation in bone defect area.

OBJECTIVETo investigate the effect of naringin on the proliferation, differentiation and matrix mineralization of MC3T3-E1 cells in vitro.

METHODMC3T3-E1 cell lines were taken in vitro model. CCk-8 method was used to observe the proliferation of MC3T3 cells. Lactic acid dehydrogenase cytotoxicity (LDH) test was used to observe the cell toxicity. Bone morphogenetic protein-2 (BMP-2), alkaline phosphatase (ALP) and osteocalcin (OC) were used to observe the cell differentiation. Von kossa calcification staining method was used to observe the cell calcification.

RESULTSThe high dosages of the naringin could promote the proliferation of MC3T3-E1 cells at both 12 h and 24 h. While, low dosages did not show the same capability. LDH test showed that the cytotoxicity percentages in all six naringin treated groups were quite low. BMP-2 cytoimmunochemistry test showed that the three naringin treated group (10, 1, 0.1 micromol x L(-1)) showed higher brown coloration in cytoplasm than the control group at both 24 h and 48 h. 1, 0.1 micromol x L(-1) naringin raised ALP activity of MC3T3-E1 cells at 48 h (P < 0.05). Meanwhile, 0.1 micromol x L(-1) naringin increased the ALP activity at 72 h (P < 0.05). 10 and 1 micromol x L(-1) naringin increased the capability of MC3T3-E1 cell to synthesize osteocalcin during 8th - 12th dsince adding the medicine (P < 0.05). Naringin did not show the positive effects on cell calcification.

CONCLUSIONSNaringin could promote proliferation and differentiation of MC3T3-E1 cells.

Animals ; Bone Morphogenetic Protein 2 ; metabolism ; Calcification, Physiologic ; drug effects ; Cell Differentiation ; drug effects ; Cell Line ; Cell Proliferation ; drug effects ; Flavanones ; pharmacology ; Mice ; Osteoblasts ; cytology ; drug effects ; metabolism ; Osteocalcin ; metabolism

Objective To study the effects of surfactants on conformation of hemoglobin and further to understand the potential impact of surfactants in environment on human health. Methods The changes of the conformation of hemoglobin induced by cation and anion surfactants were investigated with four methods, such as synchronous fluorescence spectra, UV, electrochemistry and atom force microscope. Results The changes of the conformation of hemoglobin induced by anion surfactant were obvious but were not by cation surfactant. Conclusion Sodium lauryl sulphate, an anion surfactant, may change the conformation of hemoglobin.

The changes in the contents of free amino acids in hemolymph of Anopheles stephenst were determined by automatic amino acid analyzer.The changes in hemolymph protein were determined by ultraviolet absorption method.Free amino acids in hemolymph of infected mosquitoes were compared with those in noninfected mosquitoes.At 4 days after blood meal,6 kinds of amino acids decreased markedly,and 5 kinds of amino acids increased markedly; at 7 days after blood meal,4 kinds of amino decreased markedly,while 7 kinds of amino accids increased markedly; at 11 days after cids blood meal,9 kinds of amino acids decreased markedly,and 4 kinds of amino acids increased remarkably.The protein concentration of infected mosquitoes was higher than that of noninfected ones.