Developments in science and technology include the use of laser as an auxiliary device in treating oral diseases. Nd:YAG laser is convenient and safe to use. Nd:YAG laser irradiation leaves no scabby area on the wound surface, causes a mild reaction postoperation, and promotes high comfort. Therefore, this treatment has attracted increasing attention in the clinical setting. This review enumerates the applications of water-cooled pulsed Nd:YAG laser in hard and soft tissues in oral medicine. Nd:YAG laser in hard tissues can be applied in cavity preparation, acid etching, root canal preparation and sterilization, and dentin desensitization therapy. Meanwhile, the applications of this laser in soft tissues include adjunctive therapy in basic periodontitis treatment, gingival aesthetic treatment, and resection. This review suggests the importance of Nd:YAG laser as an auxiliary device in the clinical diagnosis and treatment of oral diseases.
Dental Cavity Preparation ; Dentin ; Humans ; Lasers, Solid-State ; Oral Medicine ; instrumentation ; methods ; Root Canal Preparation

Adult ; Antigens, CD20 ; metabolism ; Antiviral Agents ; therapeutic use ; Bone Marrow Transplantation ; adverse effects ; CD3 Complex ; metabolism ; Epstein-Barr Virus Infections ; drug therapy ; etiology ; Follow-Up Studies ; Foscarnet ; therapeutic use ; Humans ; Ki-67 Antigen ; metabolism ; Lymphoproliferative Disorders ; drug therapy ; etiology ; immunology ; virology ; Male

A simple and efficient method for fabricating a novel surface-enhanced Raman scattering ( SERS) substrate with good reproducibility and high SERS activity was reported. Cu2 O was prepared by mixing CuCl2 ·2H2 O with ascorbic acid, which was then used as the templates for depositing of gold nanoparticles ( AuNPs) on their surfaces, forming Cu2 O@ Au with heterostructures. Transmission electron microscopy, scanning electron microscopy and X-ray diffraction observation revealed that Cu2 O had polyhedral structure and smooth surface, and AuNPs were closely deposited on the surface of Cu2 O. It was used as SERS substrate for detection of Rhodamine B with linear detection range of 1 × 10-2-5 × 10-6 mol/L, and detection limit of 3 ×10-7 mol/L. Cu2 O@Au showed good chemical stability, remained stable in acid, PBS and river samples, and could be used in the SERS detection of target in water sample.

Objective To investigate the function of soluble stem cell factor receptor(s-kit)and stem cell factor(SCF) in chronic aplastic anemia(CAA).Methods ELISA assay was employed to determine the levels of s-kit and SCF in peripheral blood of CAA patients and umbilical cord blood.Results The levels of s-kit and SCF in peripheral blood of CAA patients are lower than those of normal group and umbilical cord blood group.Conclusions The decreased levels of s-kit and SCF show that s-kit and SCF may play a role in CAA mechanism.The raised levels of s-kit and SCF show that s-kit and SCF may be applied in the field of cord blood transplantation.

Objective To explore the application of diffusion weighted imaging(DWI) in diagnosis of viral encephalitis in children.Methods Conventional MR imaging(T2WI and T1WI) and DWI were performed on 20 patients with viral encephalitis diagnosed clinically.Location and number of lesions demonstrated on these imagings and percents in their abnormality were compared.Results Percen-(tage of abnormality) demonstrated on DWI was significantly higher than that on T1WI(?~2=4.44 P

Objective:To investigate the effect of metformin and arsenic trioxide on KG1a cells proliferation of acute myeloid leukemia and its possible mechanism.Methods:CCK-8 method was used to detect the killing effect of metformin,arsenic trioxide and combined application on KG1a cells.Annexin V-FITC/P1 Dual Stain Flow Cytometry was used to detect the effect of combined application on apoptosis of KG1 a cells.Western blot was used to detect the expression of intracellular apoptosis-,autophagy-related protein.Results:Metformin and arsenic trioxide alone or in combination could inhibit the proliferation of KG1 a cells and induce apoptosis of KG1 a cells,and the proliferation inhibition rate and apoptosis rate in the combined drug group were higher than those in the drug group alone(P＜0.05).The combination of drugs induced upregulation of Caspase 8 protein and P62 protein expression and was higher than that in the drug group alone(P＜0.05).Conclusion:Metformin can synergize with arsenic trioxide to kill KG1a cells,and its mechanism of action may be related to inducing apoptosis and enhancing autophagy.

Antigens, CD20 ; analysis ; Biopsy, Needle ; Breast Neoplasms ; chemistry ; pathology ; Female ; Humans ; Lymphoma, B-Cell, Marginal Zone ; chemistry ; pathology ; Middle Aged ; Nipples ; pathology

To interpret the flash evoked potential (FVEP) as dynamic high-order responses to natural and experimental stimulation in healthy preterm infants, waveform analysis of FVEP in 36 healthy preterm infants (postconceptional age 28~42 weeks) were performed using an autoregressive analysis. Based on the histogram of damping frequency of different component impulse response waveforms, the waveforms were divided into 4 groups: group I (0 ~ <2 Hz), group II (2 ~ <6.5 Hz), group III (6.5 ~ <12.0 Hz) and group IV (12~25 Hz). The total power, power of component impulse responses (group I~IV), and damping time (group II~IV) changed significantly with increasing postconceptional age (P<0.01 or P<0.05). Identification of an impulse response component with dominant frequency which undergoes a well-identified change with age is considered to be a useful tool for discriminating between normal and abnormal changes in the FVEP with age in healthy preterm infants.
Evoked Potentials, Visual ; physiology ; Female ; Humans ; Infant, Newborn ; Infant, Premature ; physiology ; Male ; Reaction Time ; Sleep ; physiology

Objective To investigate the effects of autologous bone mesenchymal stem cells(MSC) transplantation on malignant arrhythmia induced by electrophysiological (EP) stimulation and cardiomyocyte ion channels remodeling in a mini-swine model of acute myocardial infarction (AMI). Methods Immediately after AMI(LAD occluded for 120 min),MSC(10×107,labeled by colloidal gold and cocultivated with 5-azacytidiRe,5-aga,n=12) or equal volume saline (n=10) were iniected through over-the-wire (OTW) balloon in LAD at distal over D1.EP stimulation is performed after 2 hours and 4 weeks in both groups to induce arrhythmia.The variance of heterogeneity of sodium currents(INa)and INa steady-state inactivation curves in different zones of infracted wall were investigated by patch clamp technology and the relationship between ionic channel and ventrieular arrhythmia is analyzed.Results EP induced malignant ventficular arrhythmia (VT) rate was similar (MSC 75% vs.saline 90%.P=0.455) at 2 hours post AMI and was significantly lower in MSC group(25% vs.80%,P=0.012) at 4 weeks post AMI.The Peak INa current densities of the Endo,Media and Epi were significantly lower in MSC group[(-14.04±3.82)pA/pF,(-29.26±5.70)pA/pF,(-12.43±3.04)pA/pF] compared those in saline group [(-9.71±3.38)pA/pF,(-18.98 ±4.05)pA/pF,(-8.47±3.34)pA/pF,all P<0.05].The IHa steady-state inactivation curves of the Epi,Endo and Media in mini-swine with VT in MSC group [(-126.2±10.9)mV,(-106.7±11.9)mV,(-105.4±11.0)mV] were similar as those in saline group with VT[(-129.1±10.9)mV,(-112.2±9.9)mV,(-109.7±9.2)mV,all P>0.05] while significantlylower compared to MSC group without VT[(-93.1±13.8)mV,(-95.2±15.5)mV,(-103.4±8.7)mV,all P<0.05].The multiple logistic regression analysis showed that INa current density (RR=1.449,95%CI 1.276-2.079,P=0.029) and INa steady-state inaetivation curves(RR=1.092,95%CI 1.008-1.917.P=0.012) were the independent factors for reduced VT.Conclusions Autologous MSC attenuated malignant ventricudar arrhythmia induced by EP at 4 weeks in nlini-swine with AMl which might due to altered eardiomyocyte ion channels remedcling induced by MSC.

OBJECTIVESTo study the acupoint specificity through the comprehensive evaluation of the acupuncture effect on rat model with the middle cerebral artery occlusion (MCAO).

METHODSDuplicated MCAO model by Zea-longa's thread ligation was assessed by Zausinger's six-point method, and rats with 1-3 scores were chosen to be grouped. According to the randomized and controlled principle, rats were divided into 6 basic control groups (including normal group, sham group, model control group, model group without intervention, Nimodipine group, lateral-to-Renzhong group) and 6 acupuncture groups [including Neiguan (PC6) group, Weizhong (BL40) group, Chize (LU5) group, Sanyinjiao (SP6) group, Renzhong (DU6) group and non-acupoint group]; in each acupoint or non-acupoint 9 different parameter combinations were respectively set by orthogonal intersection method. There were in total 60 groups, and each group had 12 rats. The rats were treated by acupuncture with the lifting-thrusting manipulation every 12 h, in total 6 times. Indices of neurobehavioral scores, cerebral blood flow, infarction rate, microcirculation, and light microscope, etc. were measured. In order to comprehensively evaluate the acupuncture effect to research the specificity of acupoint, a cluster analysis was made with SPSS17.0 for the comprehensive effect scores of the samples computed according to the comprehensive evaluation models, and then sorting and classification were made for the comprehensive effect scores.

RESULTSIn the acupuncture groups every acupoint had different therapeutic effect due to different acupuncture parameter combinations; among the acupuncture groups the orders of curative effect were as followings: Neiguan group was of exceptional result, Weizhong group and Sanyinjiao group were of valid results in upper level, Chize group and Renzhong group were of valid results in lower level, and non-acupoint group was of invalid result; the therapeutic result of acupoint group was superior to non-acupoint group; and the curative effect of acupuncture group was also superior to basic control group.

CONCLUSIONThe acupoint has the specificity of acupuncture effect, and the acupoint specificity is relative.

Acupuncture Points ; Acupuncture Therapy ; Animals ; Cerebral Infarction ; therapy ; Cluster Analysis ; Disease Models, Animal ; Male ; Rats ; Rats, Wistar