Objective:To observe the changes of plaque microflora during the experimental gingivitis and to analyze the relationship between the plaque microflora and the clinical parameters.Methods:11 young male subjects with healthy gingiva and without systemic disease were selected.Subgingival plaque samples(2 sites /person)were collected and then smeared by Gongo red at baseline(0 day),the 7th,14th,21st day(without oral hygiene)and 28th day(7 days after reestablishing oral hygiene)respectively during experimental gingivitis.At the same time the clinical parameters were recorded.The results of smear and the clinical parameters were analyzed.Results:The percentage of spirochete was the lowest at the baseline and increased during the experimental gingivitis,and then reached the highest level on the 21st day.The percentage of spirochete of the 21st day showed the significant different compared with that of baseline(P0.05)Conclusion:Spirochete is correlated to the development of the gingivitis.

Objective: To measure GCF calprotectin and total protein for evaluating whether the calprotectin could be a sensitive marker for the initial inflammation of gingiva. Methods: Eleven young male subjects with healthy gingiva, who had no systemic diseases, were selected for this study. GCF samples (4 teeth /person) were collected with strips of filter paper at baseline (0 day), on the 7 th, 14 th, 21 st days (without oral hygiene), and 28 th day (7 days after reestablishing oral hygiene) during experimental gingivitis. The amount of calprotectin was measured by ELISA. The amount of total protein was assessed with protein dye binding assay. Results: The amount of calprotectin increased during the experimental gingivitis, and reached the highest level on the 21 st day. After oral hygiene was reestablished it reduced to the level of baseline. The amount of total protein had the same tendency as calprotectin. Conclusion: The amount of calprotectin and the total protein in GCF can reflect the initial inflammation of gingiva.

Objective: To investigate the changes of osteoprotegerin ( OPG) and receptor activator of nuclear factor kappa B ligand ( RANKL) level in perio-implant crevicular fluid ( PICF) and to monitor the development of the stability of Straumann ? tissue-level implants by resonance frequency analysis ( RFA) during the early phases of healing .Methods: A total of 35 implants ( length 10 mm ) were placed.PICF samples were collected with filter paper strips at baseline , 1, 2, 3, 4, 6, 8, and 12 weeks post-surgery, respectively.The OPG, RANKL levels were determined by ELISA method .At the same time points, the implant stability quotient (ISQ) values were determined with Osstell TM mentor.Results:During healing , PICF-OPG levels increased significantly 2 weeks after surgery when compared with the 4th-, 6th-, 8th-and 12th-week reevaluation (P<0.05).The OPG/RANKL ratio in PICF was significantly higher ( P<0 .05 ) than that in gingival crevicular fluid at 1 week post-surgery .ISQ slightly fluctuated within the first 4 weeks after installation .Following this, the ISQ values increased steadily for all the implants and up to 12 weeks.Significant differences were noted between the mean ISQ values at the 12th-week and other observation time points .Conclusion: The PICF-OPG levels may be effective in monito-ring the process of osseointegration .All the ISQ values indicated the stability of Straumann ? implants over a 12-week healing period .RFA is a reliable and effective assistant to monitor implant stability .

Objective To investigate the clinical application of ultrasound-guided percutaneous puncture aspiration and sclerotherapy of liver hydatid cysts.Methods Thirty-eight patients of hepatic hydatid cysts underwent ultrasound-guided percutaneous puncture aspiration and sclerotherapy;then 20%-25%septic hypertonic saline or 95%absolute alcohol were injected into the cysts (the volume was about 25%-50%of the aspirated fluid) ;and the fluid was reaspirated after 5-15 min.At last,5-10 ml sclerosing agent was injected again.Oral albendazole 30-50 mg/kg was administrated to all patients before and after the above procedures.Ultrasonic follow-up was performed at 3-month interval in the first year and once a year afterwards.Results The successful rate of once puncture was 100%.Aher 6 months,cysts volume reduced 50% in 16 patients,reduced 30% in 22 patients.One year later,34 patients were cured,3 were effectively treated and 1 was improved.All hydatid cysts volume gradually decreased and calcification occurred.The total cure rate was 100%. Conclusion Ultrasound-guided percutaneous puncture aspiration and sclerotherapy is a safe,effective and reliable treatment of liver hydatid cysts.

Objective: To evaluate methods of detecting various component in the trace sample of the gingival crevicular fluid (GCF). Methods: One sample of GCF was collected from four patients with mild or moderate periodontitis. At first, one half (group A)of every sample was measured for interleukin-6 (IL-6) by enzyme-linked immunosorbent assay (ELISA) and then detected for Interleukin-1? (IL-1?) in the same sample .Another half (group B) of the sample was used as control for the measurement of Interleukin-1? (IL-1?). Another sample of GCF was collected from nine patients with abutment and non-abutment because of the distal extension teeth lost resulted from the chronic periodontitis. At first, one half (group C) of the sample was detected for tumor necrosis factor -?(TNF-?) by ELISA and then measured for elastase in the same sample. Another half (group D) of the sample was used as control for the measurement of elastase. Results: There was no significant difference of both the measured value of IL-1? absorbency (group A and B are 0.5?0.4 and 0.5?0.4, respectively, P=0.136)and that of elastase absorbency (group C and D are 1.1?0.6 and 1.1?0.6,respectively, P=0.943) between the original elution and the sample after detection of IL-6 or TNF-? in the test 1 and test 2, respectively. Moreover, the values showed high correlation (r=0.993, P=0.000 in the group A and B; r=0.979, P=0.000 in the group C and D). Conclusion: It is practicable that one sample of GCF can be reused to examine for several components of GCF.

Objective To survey the working situation of community nurses and care needs of the residents in a prefecture-level city.Method One hundred and thirty-five community nurses and 338 residents were selected and investigated by self-designed questionnaire.Results Community nurses still focused on the area of nursing and treatment rather than prevention,rehabilitation, health care,health education and family planning,which need to be paid more attention to.The needs of residents on community nursing service shift from disease treatment to disease prevention and health promotion.The current community nursing service cannot satisfy residents’care needs.Conclusion Community nurses should provide demand-oriented community care to the residents, strengthen the concept of disease prevention and health promotion,and set up community health centers to be a blend of prevention, health care,rehabilitation,health education and family planning as soon as possible.

Objective: To explore the association of the single nucleotide polymorphisms (SNPs) in N-formylpeptide receptor (FPR) gene with the susceptibility of aggressive periodontitis (AgP). Methods: A total of 94 AgP patients and 73 healthy controls were entered into the study. Peripheral blood sample was obtained from each subject by venepuncture. Genomic DNA was isolated from each sample.The target fragment of FPR gene was amplified by PCR. The SNPs in FPR gene were detected by denature high performance liquid chromatography ( DHPLC) combined with DNA sequencing. Results: There were two non-synonymous SNPs in the 370 bp FPR gene fragment;289C/A and 301G/C. The 289C/Awas a novel SNP. No variation in nucleotides 329 and 378 was detected. There were no statistically significant differences in distributions of the genotypes and alleles for FPR289 and FPR301 between AgP patients and healthy controls. Using multivariate logistic regression (adjusted for age and gender) , it was showed that the adjusted Ors of AgP for the C~+ genotype and allele C of FPR301 combined with smoking were 5.74 and 5.20 respectively. Conclusion: The presence of the C~+ genotype/allele C of FPR301 together with smoking conferred a higher risk for AgP. The result suggests that the SNPs in FPR gene may not be associated with the susceptibility of AgP in Chinese.

Objective To investigate the clinical features, effective treatment, survival and prognostic factors of second primary tongue squamous cell carcinoma (SPTSCC) after nasopharyngeal carcinoma (NPC) radiotherapy. Methods The clinical data of 35 cases with SPTSCC after NPC radiotherapy were analyzed retrospectively. Kaplan-Meier method, Log-Rank test and COX proportional hazard mode was performed for statistical analysis. Results 3-year and 5-year overall survival rates were 55 % and 47 %, respectively, lymph node metastasis rate was 5.71 %. Univariate analysis indicated that gender (χ2 = 8.89, P = 0.00), T classification (χ2= 5.58, P= 0.02), clinical stage (χ2 = 8.51, P= 0.04) and treatment methods (χ2 = 29.37, P = 0.00) were important factors of prognosis. Multivariate analysis showed that treatment methods (P = 0.00) and T classification (P = 0.03) were independent prognostic factors. Operative treatment group had better prognosis than the non-operative treatment group, the difference was statistically significant (P <0.05), male patients in the risk of SPTSCC was higher than the female patients, and the incidence of SPTSCC was increased along with extension of the time after NPC radiotherapy. Conclusion The rate of the lymph node metastasis is lower for SPTSCC after NPC radiotherapy and treatment patterns and T stage are independent prognostic factors. Long-term follow-up after NPC radiotherapy is necessary to the early diagnosis of SPTSCC, so that to give surgery or combined therapy with surgery in order to achieve a good effect.

Objective:To analyze the serum IgG titers to Aggregatibacter actinomycetemcomitans ( Aa ) and associated factors in patients with aggressive periodontitis (AgP).Methods:Venous blood samples were collected from 62 AgP patients and 45 periodontal healthy controls , unstimulated whole saliva and pooled subgingival plaque samples of AgP patients were also collected for the detection of Aa ( PCR method) .Serum IgG titers to Aa serotype c were measured by enzyme-linked immunosorbnent assay ( ELISA) .Results:The detection rates of serum IgG to Aa serotype c in the AgP patients and the healthy controls were both 100%.The AgP patients exhibited significantly higher IgG titers to Aa serotype c than the healthy controls (11.1 ±1.9 vs.9.1 ±1.8, P<0.01).There was no significant difference in serum IgG levels to Aa serotype c and in the prevalence of high-responding patients to Aa serotype c between the incisor-first molar type AgP patients and generalized AgP patients .Serum IgG titers to Aa serotype c in the Aa-positive AgP patients ( the patients who were Aa-positive in subgingival plaque or saliva ) were sig-nificantly higher than those of the Aa-negative patients (11.9 ±1.3 vs.10.7 ±2.1, P<0.05).Con-clusion:Serotype c was the main serotype of Aa in Chinese patients with AgP .Serum IgG responses in generalized AgP patients were comparable to those in incisor-first molar type AgP patients .

OBJECTIVESTo study the essence of N-terminal amino acid sequence of 12 000-protein in gingival crevicular fluid (GCF).

METHODSGCF samples from patients with RPP and AP were collected. 12 000-protein was separated by SDS-PAGE and transformed to PVDF by electronic transformation. The aim band was cut to be analyzed in 491 Protein Sequencer.

RESULTSThe first ten of N-terminal amino acid sequence of 12 000-protein in GCF was Met, Leu, Thr, Glu, Leu, Glu, Lys, Ala, Leu, Asn. Through checking up in MS-Edman, the sequence was similar to "Ca binding protein, MRP8" which is the light subunit of Calprotectin.

CONCLUSIONSCalprotectin is a major protein in granulocytes and monocytes, and is related to many inflammatory diseases, maybe served as a effective marker for evaluating the inflammation of periodontium.