1 1 patients with moderate or severe crowding in the anterior arch were treated with 4 premolar extraction.After canine distaliza-tion first approach,the teeth were aligned and leveled.The results of the study suggest that,with strict implementation of indication,this method may be a viable treatment for the moderate or severe crowding anterior.

Objective To identify the potential correlation of serum 25-hydroxyvitamin D3 [25 (OH)D3]and C-reactive protein (CRP) with coronary artery disease.Methods We measured the serum 25 (OH)D3 and CRP levels in 416 suspected coronary heart disease patients who underwent coronary angiography.Gensini scores were used to assess the severity of coronary stenosis.Based on the results of coronary angiography,the 416 patients were divided into normal group (n =246),stable angina group (n =110),and acute coronary syndrome (ACS) group (n =60).Results The serum levels of 25 (OH) D3 in the normal group and stable angina group were significantly higher than that in the ACS gropu [(33.15 ± 20.95) nmol/L vs.(15.55 ±5.7) nmol/L,(28.93 ± 16.45) nmol/Lvs.(15.55 ± 5.7) nmol/L,bothP＜0.001].TheCRPlevelin the normal group was significantly lower than those in the stable angina group and the ACS group [(4.33 ± 0.12) rng/Lvs.(5.68 ± 0.25) mg/L,(4.33 ± 0.12) mg/Lvs.(5.73 ± 0.31) mg/L,bothP＜0.001].The serum 25 (OH)D3 was not correlated with CRP or Gensini score in the normal group.In the ACS group,the serum 25 (OH) D3 was negatively correlated with CRP level and Gensini score (r =-0.026,P =0.045 ; r =-0.256,P =0.048),while CRP level was positively correlated with Gensini score (r =0.459,P ＜0.001).Inthe stable angina group,the serum 25 (OH)D3 was also negatively correlated with CRP level and Gensini score (r =-0.211,P =0.027; r =-0.208,P =0.029),and the latter two were positively correlated (r =0.574,P ＜ 0.001).Conclusions Low serum 25 (OH) D3 levels are associated with coronary artery stenosis.Combining with CRP,it may be involved in the pathogenesis of coronary heart disease through inflammatory mechanism.

Objective:To analyse the effects of mandibular swing approach in the treatment of the tumors in infratemporal fossa. Methods:11 patients with tumors in infratemporal fossa treated by the surgical operation with mandibular swing approach. The mandi-ble cut was at the front of foramina mentale in 5 cases, at the front of mandible angle in 4 cases and at the middle of chin in 2 cases re-spectively. Results:According to the nature, location, size and the relationship of the tumors with peripheral nerve and blood vessels, flexible selection of the position of mandibular cut could fully expose and completely remove the infratemporal fossa tumor. Conclusion:Surgical treatment of the tumors in infratemporal fossa by mandibular swing approach is safe and effective.

Objective To improve the understanding of primary pulmonary artery sarcoma(PAS)and its early diagnosis and treatment.Methods The clinical data of 3 PAS patients in Beijing Anzhen Hospital and related literature,the clinical features,diagnosis and therapy of the disease were retrospectively studied.Results Pulmonary artery sarcoma had similar clinical presentations to pulmonary thromboembolism(PTE).Although CT pulmonary angiography and Color Doppler echocardiography etc were helpful to the diagnosis of the entity,the confirmed diagnosis needed the operation.The surgery was main therapy for the disease.Conclusion Pulmonary artery sarcoma is easily misdiagnosed as PTE.The clinicians should pay more attention to the disease so as to early diagnose and treat it.

Objective: To study the chemical components of Citrus medica L.var. sarcodactylis Swingle and to supply evidence for the quality control. Methods: Chromatography and recrystallization methods were applied to analyze the components. Results and Conclusion: Three compounds were extracted from Citrus medica L. var. sarcodactylis (Noot) Swingle. And their structures were identified as Limettin (I), stigmasta-5,22-dien-3-ol (II) and palmitic acid (III) by the methods of UV, MS, IR, 1HNMR, 13CNMR and DEPT. Stigmasta-5,22-dien-3-ol (II) was obtained by extraction.

OBJECTIVE To investigate deep fungal hospital infection and methods of its decreasing. METHODS Case histories of near 3 years of hospitalized patients from Jan 2002 to Dec 2004 were analyzed according to Diagnosis Standard of Nosocomical Infection under the items,such as the patients,age,underlying disease,sample,strain,and species distribution. RESULTS There were 360 fungus strains belonged to 15 species in all samples;the patients age was 14-94 with 20 kinds of various underlying diseases;the fungi included Candida albicans,and C.tropicalis,accounted for 61.1% and 17.2%,respectively;the samples were sputum,urine,vaginal secretion,BLA,throat swab and pus,which were 42.2%,21.1%,13.9%,8.4%,5.8%,and 3.6%,respectively;the respiratory department,ICU,and urology department were mainly involved. CONCLUSIONS To prevent fungal infection, measures such as hospital′s environment and management including reasonable use of antibiotics play a great role in monitoring hospital fungal infection and its epidemiology.

Objective To determine the content of 5,7-dimethoxycoumarin in Fructus Citris Sarcodactylis. Methods HPLC was used. Mobile phase was methanol-water(65 ∶35),detection wavelength at 326 nm,flow rate 1mL/min and column temperature at 35 ℃.Results The linearity of 5,7-dimethoxycoumarin was in the range of 0.3528～1.7640 ?g. The regression equation was Y=2403.73 X-65.35,r=0.9998. The average recovery was 99.33 %,RSD=1.47 %(n=6). Conclusion The method is simple and accurate. It can be applied in the determination of 5,7-dimethoxycoumarin in Fructus Citris sarcodactylis.

BACKGROUND: Inert biomaterials such as metal usually hold poor biocompatibility and weak bonding force, which is against the effect of dental or bone implants. Therefore, how to improve their biocompatibility has become the research hotspot.OBJECTIVE: To prepare collagen-coated titanium alloy (Ti6Al4V), and to assess its biocompatibility.METHODS: Ti6Al4V served as the matrix, the 3-amino propyl triethoxy silane (KH550) as the crosslinking agent, and the three-dimensional printed titanium alloy coated by collagen type Ⅰ and Ⅱ was prepared,respectively. The coated materials were co-cultured with mouse preosteoblasts MC-3T3-E1 to evaluate its biocompatibility. The effect of different kinds of collagen on the cell differentiation was compared by differential recognition of surface proteins.RESULTS AND CONCLUSION: When the N content on the titanium alloy surface (Φ10 cm) was 8.41%, the cladding quantity of collagen type Ⅰ and Ⅱ was 0.81 and 0.77 mg, respectively. Compared with the bare titanium alloy, the cell adhered well and distributed extensively on the coated titanium alloy,which showed strong viability and fast proliferation.The cells cultured on collagen type Ⅰ coated materials expressed the proteins associated with matrix synthesis, and those on collagen type Ⅱ coated materials expressed the proteins associated with mineralization. These results clarify that the collagen coating can improve the biocompatibility of titanium alloy, and different types of collagens act on different functional proteins.

Kenaf has a high content of gum that is difficult to remove. Traditional chemical degumming process causes serious environmental pollution. To solve the problem, we developed a new method to degum kenaf. We pretreated the kenaf with steam explosion followed by ultrasonic treatment. We chose the single factor tests to select the ultrasonic frequency, sodium hydroxide concentration and processing time. Combined with orthogonal tests, we found that the optimum conditions were as follows: ultrasonic frequency was 28 kHz, sodium hydroxide concentration was 2%, and processing time was 60 min. Under these conditions, the residual gum of kenaf fiber was 9.72% and the fineness was 139.45 N(m). Steam explosion combined with ultrasonic method is effective in degumming of kenaf.
Hibiscus ; Plant Gums ; isolation & purification ; Sodium Hydroxide ; chemistry ; Steam ; Ultrasonics