Intracanal antisepsis acts as one of the fundamental steps in root canal therapy. Intracanal medication is very common among the multitudinous root canal disinfection methods so far. However, as the most frequently-used intracanal medication, calcium hydroxide exists some problems, such as insufficient antimicrobial power and antibiogram. Thus exploring new root canal disinfectant is necessary. Herbal medicine is gaining favor for its wide varieties, broad efficacy and affordable prices. The current researches revealed that many kinds of herbs or compound herbal preparations possess good ability of antimicrobial and other properties that superior to those of traditional root canal disinfectants. However, herbal medicine itself and the studies have shortcomings. This paper will provide a review of various herbal alternatives that are being studied of late years.
Antisepsis ; Calcium Hydroxide ; Herbal Medicine ; Root Canal Irrigants ; Root Canal Therapy

Objective To investigate the suitable mode of induced termination of pregnancy at second and third trimester for women with scarred uterus. Methods A retrospective study was performed in 90 cases of second and third trimester pregnant women with scarred uterus, who requested termination of pregnancy due to medical indications in Beijing Obstetrics and Gynecology Hospital from September 2002 to June 2009. The indications of termination of pregnancy were fetal anomaly, serious pregnant complication and intrauterine fetal deaths. 72 second trimester pregnant women and 18 third trimester pregnant women were included in this study. The interval time of previous operation to this pregnancy were recorded. And it was <2 years in 20 cases and ≥2 years in 70 cases. The patients with normal Hepatic function began to take mifepristone and had an allergic test of Ethacridine Lactate. The method of mifepristone combined with Ethacridine Lactate were adopted when the allergic test was negative (group A, 54 cases). The method of mifepristone combined with earbeprost methylate suppositories were used in the patients who had a positive reaction to the allergic test of Ethacridine Lactate, or who failed to amniotomy to inject Ethacridine Lactate because of oligohydramnios or small gestational age(group B, 36 cases). Record the detail information of every patient. (1) Age, gestational weeks, gravidity and parity. (2) The mode of previous operation (inducing the scar of uterus), previous operation time and indication. (3) The mode of induced labor in this pregnancy, the interval time from administration to uterine contraction, delivery or not and the interval time from induction to delivery. (4) Postpartum hemorrhage, the successful rate of induce labor, placental retention ratio and rupture of uterus or not. Results (1) It had no significant difference between group A and group B in age, gravidity, parity and the interval time of previous operation to this pregnancy (P> 0.05). But there was significant difference between two groups in gestational weeks of induction(16 weeks vs. 25 weeks,P<0.01). (2) It had no significant difference between two groups in successful rate of induction and postpartum hemorrhage(P>0.05), but the time from induction to regular uterine contraction and delivery in group B was significant shorter than that of group A(P<0.01). The rate of delivery with 24 hours in group B was 94%. It was significant higher than that of group A(13%, P<0.01). (3) The rate of retained placenta in group B (31%, 11/35) was significant higher than group A (10%, 5/52), but the ratio of residual of placenta and membranes in group A was significant higher than that of group B(54% vs. 34% ). It was no significant difference in total rate of postpartum complication between two groups. Further analysis was done in relationship of complication and the time of previous operation. It was no significant difference between the over 2 years group and the less 2 years group in the incidence rate of complications including placental retention, residual of placenta and membranes, rupture of uterus, placental abruption and postpartum hemorrhage. (4) There was 1 case of uterine rupture in group B and 1 case of placental abruption in group A. Conclusions Both of methods of mifepristone combined with carboprost methylate suppositories and the mifepristone combined with Ethacridine lactate are feasible to induced second trimester and late trimester termination of pregnancy for women with scarred uterus. But sufficient preoperation preparation and the course of induction and labor careful monitoring must be done to prevent the uterine rupture.

Objective: To explore the relationships between locus of control,rumination and depression among adolescents.Methods: 361 high school students completed the IPC(Internality,Powerful Others,and Chance Scale),MRQ(Maladaptive Rumination Questionnaire) and SDS(Self-Rating Depression Scale).Results: ①Significant negative correlations were found between internality and rumination(r=-0.25) and depression(r=-0.39),while positive correlations between chance and rumination(r=0.34) and depression(r=0.38),as well as between powerful others and rumination and depression.②Regression analysis indicated predictability of I,C and rumination to depression.③Path analysis confirmed rumination was a partial mediator between internality,chance and depression.Conclusion: Rumination plays an important mediation role between locus of control and depression.

Independent component algorithm (ICA) is a method of higher-order statistics(HOS) with the study objects of multivariate random signals that are mutual independent. It aim is to transform multivariate random signal into the signal having components that are mutually independent in complete statistical sense. This article briefly introduce series of the ICA algorisms including second order blind identification, multiple unknown source extraction algorithm based on second-order statistics, as well as Informax, modified Informax, fast fixedpoint ICA and joint approximative diagonalization of eigenmatrix (JADE) algorithm that are based on HOS. At the end of the article, the performance of each algorithm is compared and its application prospect is forecasted.

Different hospital HIS suppliers were overall assessed according to the corresponding assessment index systems established with HIS suppliers as the study object based on the function demands for HIS in order to help hospitals to select their appropriate HIS suppliers .

OBJECTIVEThis study aims to investigate the prevalence and distribution of teeth number and morphology abnormalities in Chinese pediatric patients' permanent teeth at the mixed dentition stage by performing panoramic radiographs analysis.

METHODSA total of 4 347 panoramic radiographs of pediatric patients aged 5 years to 15 years who were admitted to the hospitals from September 2011 to September 2013 were reviewed. The presence of teeth number and morphology abnormalities were recorded as follows: congenitally absent teeth, supernumerary teeth, odontoma, microdontia, fused teeth, dilaceations, and cusp deformity. SPSS 16.0 software was used for statistical analysis.

RESULTSThe prevalence of teeth number and morphology abnormalities in pediatric patients' permanent teeth was 31.79% (1,382/4,347). The prevalence was higher in males. Significant difference between the genders was observed (P < 0.05). Tooth agenesis, the most frequent dental anomaly (15.00%, 652/4,347), was considerably common in females; supernumerary teeth (12.61%, 548/4,347) followed, which was significantly common in males. Both differences were statistically significant (P < 0.05). The levels of prevalence of both microdontia and dilacerations were 4.00% (174/4,347) and 2.16% (94/4,347). The prevalence of cusp deformity, odontoma, and fused teeth were relatively low at 0.74% (32/4,347), 0.51% (22/4,347), and 0.39% (17/4,347), respectively.

CONCLUSIONThe prevalence of teeth number and morphology abnormalities in children's permanent teeth at the mixed dentition stage is apparently high. Tooth agenesis and supernumerary teeth are the most frequent. Panoramic radiograph is an efficient method for the early diagnosis of teeth number and morphology abnormalities. This method can assist pediatric dentists to formulate treatment plans for children at the appropriate time.

Adolescent ; Child ; Child, Preschool ; China ; epidemiology ; Dentists ; Dentition, Mixed ; Dentition, Permanent ; Female ; Fused Teeth ; epidemiology ; Humans ; Male ; Odontoma ; epidemiology ; Patient Care Planning ; Prevalence ; Radiography, Panoramic ; Sex Factors ; Tooth Abnormalities ; diagnostic imaging ; epidemiology ; Tooth, Supernumerary ; diagnostic imaging ; epidemiology

Scaffold is one of the key elements required for tissue engineering. Porous scaffolds have several special advantages for muscle tissue engineering, and they are beneficial to cell survival, myogenic differentiation, and vascular ingrowth. The performance of porous scaffolds is closely related to the property of the biomaterials used. Additionally, the pore size and porosity may affect cell adhesion, proliferation, and differentiation. This review focuses on the application of porous scaffolds in muscle tissue engineering, including their categories, application, and advantages.
Biocompatible Materials ; Cell Adhesion ; Humans ; Muscles ; physiology ; Porosity ; Tissue Engineering ; Tissue Scaffolds

Objective To investigate the value of fasting plasma glucose (FPG) in 75 g oral glucose tolerance test (OGTT) on the diagnosis of gestational diabetes mellitus (GDM).Methods Data of 6516 pregnant women who accepted prenatal cares from Beijing Obstetrics and Gynecology Hospital,Capital Medical University between Jan.2010 and Dec.2010 were collected.All patients had normal FPG at first trimester,and accepted 75 g OGTT after abnormal 50 g glucose challenge test (≥7.8 mmol/L).According to the result of OGTT,they were divided into 12 groups,and Chisquare test was used to analyze the role of FPG of OGTT in GDM diagnosis.Results According to the International Association of Diabetes and Pregnancy Study Groups (IADPSG) criteria,15.0％ (980/ 6516) of this group of pregnant women was diagnosed with GDM by FPG (≥5.1 mmol/L) of OGTT in this study.Then,the rest 5536 pregnant women with normal FPG of OGTT were divided into 12 groups according to FPG level (FPG level interval 0.1 mmol/L).As FPG level rose,the incidence of GDM also rose (X2 =282.175,P =0.000).Similar results also appeared when the interval was 0.2 mmol/L and the FPG level was between 4.0 and 4.8 mmol/L (X2 =274.364,P=0.000).When FPG level was lower than 4.2 mmol/L(22.1％,1226/5536),the incidence of GDM diagnosed by OGTT was 3.6％ (44/1226).And when FPG level of OGTT was higher than 4.8 mmol/L,the incidence of GDM was 26.2％ (298/1138).Conclusions FPG screening is recommended between 24 and 28 gestational weeks before OGTT,and GDM low-risk women whose FPG ≤4.2 mmol/L do not need OGTT.

Objective To study the changes of intrapartum cesarean rate, cesarean indications and pregnancy outcomes after the new partogram applied. Methods Totally 3 290 pregnant women trying to vaginal delivery which were managed according to the new partogram in Beijing Obstetrics and Gynecology Hospital, Capital Medical University from August to October in 2014 (new partogram group) were involved;2 987 pregnancy women trying to vaginal delivery from May to July in 2014 which were managed according to the old partogram (old partogram group) were involved as control. The intrapartum cesarean rate, cesarean indications and the pregnancy outcomes between the two groups were analyzed. Results The rate of intrapartum cesarean delivery was 8.50%(254/2 987) in old partogram group, and was significantly higher than that in new partogram group (6.2%, 204/3 290;P<0.01). Cesarean indications in old partogram group included 18 labor protraction (7.1%, 18/254), 82 labor arrest (32.3%, 82/254), 44 relative cephalopelvic disproportion (17.3%, 44/254), 80 fetal distress (31.5%, 80/254), 23 intrauterine infection (9.1%, 23/254) and 7 cesarean delivery on maternal request (CDMR;2.8%, 7/254) . Cesarean indications in new partogram group included 33 labor arrest (16.2%, 33/204), 71 relative cephalopelvic disproportion (34.8%, 71/204), 73 fetal distress (35.8%, 73/204) and 22 intrauterine infection (10.8%, 22/204), 5 CDMR (2.5%, 5/204). There were no significant differences in incidence of asphyxia neonatorum and puerperal morbidity (P>0.05), but the incidence of postpartum hemorrhage in new partogram group was higher than the old partogram group [6.9% (14/204) versus 1.6% (4/254), P<0.05]. Conclusion After the new partogram applied, the rate of intrapartum cesarean delivery is significantly decreased, but the incidence of postpartum hemorrhage is increased.

Developing the clinical thinking ability and therefore improving the clinical practice ca-pacity are the core of the quality-oriented education and in the current medical education reforms. The rea-sons for retarding the development of clinical thinking ability in dental clinical probation were herein dis-cussed. According to the similarity between mind mapping and clinical thinking, drawing mind map was used in the creation of the clinical knowledge system; various teaching techniques were used and classical clinical cases were shown; role playing as dentist and patient was used to mimic the clinical circumstance;dentist-patient communication was emphasized and methods to evaluate the clinical thinking ability were also developed. These strategies effectively developed the clinical thinking ability of the dental students.