OBJECTIVEThis longitudinal study aimed to investigate the caries status of primary and permanent teeth among 6-year-old children in Sichuan Province from 2010 to 2012.

METHODSA sample that comprised 652 6-year-old children from six different elementary schools (three represented the urban areas, and the other three represented the rural areas) were examined according to a baseline, with follow-up examinations at 1, 2, and 3 years. Eruption and caries experience were re- corded using World Health Organization criteria.

RESULTSThe prevalence rates of primary tooth caries of 6-year-old children in Sichuan Province for 3 years were 74.23% (484/652), 75.61% (493/652), and 81.90% (534/652). The filling rate of the primary teeth was 5.87% (145/2,471) in 2012, with significant differences (P < 0.01) between the urban areas [10.84% (133/ 1,227)] and rural areas [0.96% (12/1,244)]. The total pit and fissure rate of the first molar was 14.11% (92/652) in 2012, with significant differences between the two areas (P < 0.01) [rural: 0.66% (2/303); urban: 25.79% (90/349)].

CONCLUSIONThe pre- valence of caries in the primary and permanent teeth of 6-year-old children was high. An increasing prevalence tendency was observed as the age increased. The prevalence of first molar caries indicated that prevention and control of dental caries should be performed as early as possible.

Child ; China ; DMF Index ; Dental Caries ; Dentition, Permanent ; Follow-Up Studies ; Humans ; Longitudinal Studies ; Molar ; Prevalence ; Tooth Eruption ; Tooth, Deciduous

Objective To investigate the interactional roles corticosterone and stress played during the PTSD-Like memory impairment.Methods First we established the model of PTSD-like memory using three levels of electric shock:0 mA,0.8 mA and 1.4 mA.The freezing time percent of each group were calculated 24 hours later in order to find which group of rats obtained the PTSD-like memory,and generalizing tests was used to verify it.After the model was established,rats received adrenalectomy (ADX) were operated bilaterally in order to investigate the effect of corticosterone and fed with corticosterone in the drinking water 7 days before fear conditioning.These rats were divided into four groups:control group (no corticosterone supplement,0 mA shock),Cort group (corticosterone supplement,0 mA shock),shock group (no corticosterone supplement,1.4 mA shock),Cort-shock group (corticosterone supplement,1.4 mA shock).A two-way factorial analysis of variance was used to determine whether there was a significant interaction between corticosterone and shock.Results The freezing time percent of group 0.8 mA raised compared with the group 0 mA,whereas the freezing time percent of group 1.4 mA showed reversely and the generalizing effects appeared,compared with group 0.8 mA.In two-way factorial analysis design,the freezing time percent of Cort-shock group significantly increased (P＜0.05) compared with other groups,and there was no significant variance among the other groups.Corticosterone (F=6.464,P＜0.05) and stress (F=53.419,P ＜0.01) played parts in the formation of PTSD-like memory impairment,and they interacted with each other (F=11.580,P＜0.05).Conclusion PTSD-like memory impairment can be induced on rats with high (1.4 mA) electrical shock,and they have interactional effect with each other in the process.

Objective To evaluate the effect of transcatheter arterial chemoembolization (TACE) and delayed surgery for infant hepatoblastoma.Methods TACE was performed with the initial digital subtractive angiography (DSA) under general anesthesia 1-3 times in 8 infants with huge hepatoblastoma, whose age was 2 to 12 months. DSA was done via arterials in hepatoblastoma each time before chemoembolization. The arterials were perfused with chemodrugs and suspensions in ultrasome iodized oil , and were blocked with spring rings. DSA findings indicated that the tumor shrank without new tumorous arterials after 1 month in 6 cases, and 4 of them showed no tumorous staining, and the delayed surgery was performed successfully 1 week later in 6 infants. One boy underwent systemic chemotherapy alone during 6 months after 3 times of TACE. Results TACE therapy did not encounter any major technical problem or toxic reaction caused by chemotherapy. The following DSA test 4 weeks later did not detect any new tumorous vessels in 6 cases. Six children received TACE and surgery had been followed-up with no tumor recurrence for months averagely. The boy underwent TACE and venous chemotherapy for 6 months , without surgery , had been followed-up for 48 months until the present report. CT, AFP and DSA did not show any hints of tumor recurrence. Six cases receiving 3 times TACE combined with surgery survived without tumor recurrence. Conclusions TACE is a very effective, safe and helpful therapy for hepatoblastoma, which stressed the repeated use of spring ring to block tumor vessels lastingly if necessary. If surgery is required, DSA test is needed beforehand to detect new tumorous vessels or neoplasm. If there is any , TACE is repeated. TACE combined with surgery may provide an additional promising choice in the treatment of hepatoblastoma, and repeated TACE alone may cure hepatoblastoma in infants.

ObjectiveTo study normal gait characteristics of healthy adults in different age groups.Methods90 healthy adults were divided into three groups according to their ages. It was 20～39 year group, 40～59 year group and 60～70 year group. They received a gait analysis with the gait analysis system based on digital video and image processing which could provide temporal-spatial parameters and kinematic parameters. The gait data of the three groups were compared. Relationships between gait speed and other gait parameters were investigated.ResultsThere were statistically significant differences in some parameters among three groups. Gait speed was significantly correlated with stride time, stride length, stance time (%), cadence, maximum flexion of hip and knee in swing phase.ConclusionThe normal gait patterns of healthy adult established with the gait analysis system based on digital video and image processing can be used as the base line to compare with abnormal gait.

Objective To evaluate the short term effect of bipolar arthroplasties in aged cases with intertrochanteric fractures.Methods There were 23 males and 15 females(at age of 70-93 years, average 76 years)with unstable intertrochanteric fractures treated with the third generation cementing techniques and bipolar arthroplasties that were followed up for average 2.4 years.The clinical effect was evaluate with Harris scale,X-ray films and complications.Results Of all,34 cases(89.5%)could walk freely.The average Harris scale was 84.2 points.The average period until walk with full-weight load was 5.6 weeks.The greater trochanters was united in 35 cases(92%)during average 4.2 months.No peri-prothetic ossteolysis and loosening or subsidence occurred.Conclusions Cemented bipolar arthro- plasty has good advantages of reduced laying up period and few complications.The short-term outcome is satisfactory hut the long-term outcome needs deeper observation.

Objective To discuss the risk factors attributing intracranial infection following brain injury operation. Methods Difference factors between intracranial infection group and non-infection group following brain injury operations were compared by retrospective analysis. Results Involved in the study were 770 cases in non-infective group and 142 cases (15.6%) in infective group, with the types of infection including nonbacterial meningitis, bacterial meningitis, cerebral ventriclitis and ventrical pus accumulation, cerebral abscess, subdural pus accumulation, subcutaneous or/and subskull flap pus accumulation or osteomyelitis, and incision infections. The rate of bacterial detection was 27.5%.Postoperative infections following brain injury surgery were related to hotter weather, advanced age of patients, severity of traumatic state, multiple operations in short time, successive or double-lateral craniotomies, long-time (＞5 h) operation, microsurgery, operation on skull base or postfossa, cerebral ventricle draining, subcutaneous or epidural hydrops, and emergency operation(P＜0.05). Conclusion It should be given more attention and prophylactic treatments for the brain injury with infective risk factors mentioned above.

Objective To determine the status of false-positive report of congenital syphilis (CS),to analyze the possible causes of mis-diagnosis.Methods Basic information on CS in Shanghai in the past five years was collected.We identified infants diagnosed with CS and followed up the sero- logical reactivity of those patients and their mothers.The serological reactivity[rapid plasmin reagin (RPR)and treponema palidum hemagglutination assay(TPPA)]of infants was followed-up for up to 24 months,or until both antibodies turned to negative.The medical history of the mothers was col- lected,and their sera were examined for syphilitic antibodies.Results Total 99 infants diagnosed with CS were recruited. The major diagnostic method was treponemal antibody detection.Only 31.3% of the 99 infants exhibited clinical symptoms or syphilis-like symptoms at delivery.The cumu- lative RPR loss rates of the infants were 44.2%,64.0%,72.7%,83.9% and 87.1% at 1-3,3-6,6- 12,12-18 and 18-24 months after birth,respectively.The cumulative TPPA loss rates were 1.1%, 18.6%,44.6%,66.7% and 74.4% for 1-3,3-6,6-12,12-18 and 18-24 months after birth,respec- tively.TPPA remained positive in all mothers with syphilis.Conclusion The diagnosis of congenital syphilis determined solely by the positive tests of RPR and TPPA is unreliable and can be misdiagno- sis.The diagnosis and management of congenital syphilis should be urgently improved,and that the profes- sional health institutions should perform and closely monitor the quality controls in the diagnosis of CS and standardize the intervention strategy of maternal syphilis.

OBJECTIVETo explore the clinical classification and ideal therapy for maxillofacial AVMs.

METHODSAccording to the clinical characteristics, 106 patients with maxillofacial AVMs were divided into the 4 types Of them, 38 cases were cystic dilatation lesions, 22 cases were limited thicken lesions, 42 case were diffuse thicken lesions, 4 cases were central maxillary hemangioma. 106 patients with maxillofacial AVMs were treated in our hospital, of them, 8 cases received operation (group 1); 23 cases received embolization of supplying artery alone (group 2); 37 cases received embolization of supplying artery plus hardener intra-tumorous injection (group 3); 38 cases received embolization of supplying artery plus tumor resection (group 4).

RESULTSOf all the patients were followed up 1 - 11 years, In group 1, 2, 3, and 4, the cure rates is 62.50%, 17.39%, 89.19%, and 97.37% respectively. one patient died of embolization of abnormal communication branches between external carotid and intra-cranical arteries.

CONCLUSIONS(1) This new clinical classification is beneficial for selecting method of treatment. (2) It is necessary that a good digital subtraction angiography for maxillofacial AVMs. (3) The embolization of tumor supplying artery alone could cure the small AVM with single branch terminal blood supply. (4) The embolization of supplying artery plus hardener intratumorous injection or the embolization of supplying artery plus tumor resection is an effective method for maxillofacial AVMs.

Adolescent ; Adult ; Angiography, Digital Subtraction ; Arteriovenous Malformations ; diagnosis ; therapy ; Carotid Artery, External ; diagnostic imaging ; Child ; Child, Preschool ; Embolization, Therapeutic ; methods ; Female ; Follow-Up Studies ; Humans ; Jaw ; blood supply ; Male ; Middle Aged ; Mouth ; blood supply ; Sclerotherapy

OBJECTIVETo study the expression of MMP-8 in human and rat tooth development.

METHODSImmunohistochemistry was used to detect the localization of MMP-8 protein while in situ hybridization was used to examine the expression of MMP-8 mRNA.

RESULTSThe expression of MMP-8 protein was localized in odontoblast and dentin matrix at the later bell stage in human tooth germ. The dentin was denser close to the pulp cavity. The expression of MMP-8 mRNA was found in very few polarized odontoblast at the early bell stage and all polarized odontoblast at the later bell stage in rat tooth germ.

CONCLUSIONThe results suggested that MMP-8 involved in dentin matrix rebuilding in the process of dentin formation in human and rat dental development.

Animals ; Animals, Newborn ; Dentin ; enzymology ; Embryo, Mammalian ; In Situ Hybridization ; Matrix Metalloproteinase 8 ; biosynthesis ; genetics ; Maxilla ; enzymology ; Odontogenesis ; RNA, Messenger ; biosynthesis ; genetics ; Rats ; Rats, Sprague-Dawley ; Tooth Germ ; embryology ; enzymology

OBJECTIVETo explore the spatial genetic structure of two HIV-I-resistant polymorphisms (CCR2-64 I and SDF1-3'A) alleles in the population of Shandong Province, China.

METHODSUsing the techniques of spatial stratified sampling and spatial statistics, the spatial genetic structure of the locus (CCR2-64 I and SDF1-3'A), which was shown to be important co-receptor for HIV infection, was quantified from the populations of 36 sampled counties of Shandong Province, and a total of 3147 and 3172 samples were taken for testing CCR2-64I and SDF1-3'A respectively from individuals without known history of HIV-I infection and AIDS symptoms.

RESULTSThere were significantly spatial genetic structures of the two alleles at different spatial distance classes on the scale of populations, but on the scale of individuals, no spatial structure was found in either the whole area of Shandong Province or the area of each sampled county. Although the change of frequencies of the two alleles with geographic locations in Shandong Province both showed gradual increase trends, their changing directions were inverse. The frequency of CCR2-64I allele gradually increased from the southwest to the northeast, while the frequency of SDF1-3'A allele gradually increased from the northeast to the southwest. However the RH to AIDS of combined types of their different genotypes did not represent obvious geographic diversity on the whole area of the Province.

CONCLUSIONThe frequency of allele usually has some spatial genetic structures or spatial autocorrelation with different spatial distance classes, but the genotypes of individuals have random distribution in the same geographic area. Evaluating spatial distribution of the genetic susceptibility of HIV (AIDS) to CCR2-64I and SDF1-3'A alleles, should focus on the frequencies of combined genotypes of CCR2 and SDF1 based on the two-locus genotypes of each individual rather than the frequencies of CCR2-64I and SDF1-3'A alleles.

Acquired Immunodeficiency Syndrome ; epidemiology ; genetics ; Chemokine CXCL12 ; Chemokines, CXC ; genetics ; China ; epidemiology ; Gene Frequency ; Genetic Predisposition to Disease ; Genotype ; HIV-1 ; Humans ; Immunity, Innate ; genetics ; Mutation ; Polymorphism, Genetic ; Receptors, CCR2 ; Receptors, Chemokine ; genetics