Objective To determine the mechanism underlying the mandibular angle enlargement and to provide a morphological basis for correcting the enlarged mandibular angle. Methods By axial computed tomography, it is possible to measure the width and length of the masseter and the medial pterygoid, the gonial angle, and the vertical height of the posterior mandible. The date were initially analysed by using a simple correctionials and indpendent sample T test. Results The distance between two Go points and gonial angle were significantly related with the thickness of masseter muscle, but the thickness of the medial pterygoid was on the contrary. There was significant differences between the group of prominence and the normal control in the gonial angle, the distance between two Go points and thickness of masseter . But there was no difference between the the two groups in the thickness of medial pterygoid. Conclusion The thickness of the masseter muscle is an important factor that affects the lower facial morphology. The hypertrophy of masserter muscle may cause the mandibular angle enlargement.

OBJECTIVE To investigate the drug resistance of Escherichia coli in biliary tract infection and genotype of ESBLs.METHODS Antimicrobial susceptibility test was performed using Kirby-Bauer method.The genotypes of ESBLs were detected by PCR.RESULTS The detection rate of ESBLs producing bacteria was 32.4%(23 strains),and the drug-sensitivity test indicated that E.coli was sensitive to imipenem,meropenem and cefoperazone/subactam,but these ESBLs producing strains were resistant to other antimicrobial agents.ESBLs were identified as TEM type in 16 strains,SHV type in 4 strains,CTX-M type in 12 strains and OXA type in 5 strains.CONCLUSIONS ESBLs-producing E.coli in biliary tract infections show strous resistance.TEM and CTX-M are the most common ESBLs genotypes.

BACKGROUND: Whether a combination of the nano-hydroxyapatite (nHA) scaffolds with bone morphogenetic protein-2 (BMP-2) is superimposed to promote or inhibit the bone marrow stromal stem cells, as well as its biocompatibility, remain unclear.OBJECTIVE: To observe the biocompatibility and bone formation activity of nHA/BMP-2 co-cultured with rabbit bone marrow stem cells in vitro.METHODS: Bone marrow stem cells obtained from rabbits were cultured and proliferated in DMEM medium in vitro. The cells at the third passage were inoculated into four mediums and according divided into four groups: control group, BMP-2 group, nHa group, and nHa/BMP-2 group. RESULTS AND CONCLUSION: The cell diplo-proliferation time of control group and nHa group was longer than that in BMP-2 group and nHa/BMP-2 group. The cells proliferative activity calculated by MTT assay and bone formation activity based on the alkaline phosphatase method demonstrated statistical significant difference in BMP-2 group and nHa/BMP-2 group compared with control and nHa group (P < 0.01). Experimental findings indicate that, the tissue formation of nHA/BMP-2 not only has good biocompatibility with Bone marrow stem cells, but also could bring into full play the effect of BMP-2 for promoting the proliferation, differentiation, and bone formation activity of bone marrow stem cells.

Objective To investigate the characters of morphology change and protein expres-sion in progressed renal cell carcinoma after the treatment of sorafinib. Methods Clinical data of 2 cases with progressed renal cell carcinoma treated with sorafenib were collected. The HE slices were reviewed. Immunochemistry was used to detect the expression of Vimentin, AE1/AE3, CK7, CK8, CK18, CD10, VEGF, VEGFR2, p53 and Ki-67 levels. Results There was no difference in patho-logic type between before and after the therapy of sorafenib. Both of the 2 cases were showed degener-ation in tumor cell in different degree with fibrosis and necrosis. The expression of renal cell carcinoma related antigens (Vimentin, AE1/AE3, CK7, CK8, CK18 and CD10) had no difference before and af-ter the treatment of sorafinib. The expressions of VEGF, VEGFR2, p53 and Ki-67 were increased, and the expression of Bcl-2 was decreased after the therapy of sorafinib. Conclusions There may be some morphologie differences between the metastatic tumor or the recurrent tumor and primary tumor because of the treatment of sorafenib. However the pathologic type is the same before and after the treatment of sorafenib. The main differences are the degeneration of the tumor cell and fibrosis after the treatment of sorafenib. The expression changes of VEGF and VEGFR2 may be related to the sor-afenib application.

Objective To investigate the regional cerebral blood flow (rCBF) in amnestic mild cognitive impairment (aMCI) and vascular cognitive impairment-no dementia (VCI-ND) subjects. Methods Sixteen normal elders, 10 patients of aMCI, 12 patients of VCI-ND who were aged from 50 to 80 years old and received an education of middle school or higher. All participants finished cranial CT or MRI. Xe-CT was used to evaluate rCBF of different cerebral regions of all participants. Results The distribution of rCBF of basal ganglia, the cortex and white matter was (76. 4 ± 8. 6), (48.0 ± 7. 1) and (20. 5 ± 1.7) ml· 100 g-1 ·min-1, respectively. When compared in 3 groups, the temporal and parietal lobe rCBF had a decreasing tendency in aMCI group, while in VCI-ND group, the most dominant decreasing parts were mainly concentrated in white matter region ((17. 7±2. 3) ml·100 g-1·min-1, F = 5. 740, P = 0. 002). Whatever the depth or the width was, beth periventricular and subeortical deep white matter, anterior and posterior ventricular regions were all involved. There are no dominant difference of rCBF in caudate nucleus, lentiform nucleus and thalamus. Conclusion The difference in rCBF reflects the pathological difference between aMCI and VCI-ND.

Objective To investigate the consistent long-term clinical efficacy of the procedure for prolapsed hemorrhoids (PPH) treatment for hemorrhoids.Methods Data of 87 patients with third-and fourth-degree hemorrhoids treated by surgical procedure for prolapsed hemorrhoids were collected.In all cases,third-degree hemorrhoids in 65 cases,fourth-degree hemorrhoids in 22 cases,median followed up after PPH was (3.8 ± 0.5) years.The long-term efficacy and the occurrence of complications were followed up to assess the effect of surgical procedure for prolapsed hemorrhoids.Results In patients with third-degree hemorrhoids,bleeding recurred in 2 cases (3.1％) for again bleeding,for anal bulge in 4 cases (6.2％).In patients with fourth-degree hemorrhoids,prolapse recurred in 2 cases (9.1％) for bleeding in 5 cases (22.7％).anal bulge 3 patients (13.6％),defecation difficult in one case (4.5％),one-degree of fecal incontinence in 1 case (4.5％),no other complications found,such as anal pain,anal stenosis,foreign body discomfort and fecal urgency.The chi-square test for comparison analysis suggested that:third-degree hemorrhoids postoperative prolapse and bleeding recurrence rate was significantly lower than fourth-degree hemorrhoids.Conclusions Procedure for prolapsed hemorrhoids treatment for hemorrhoids is safe and feasible,has small trauma,little pain,and definite efficacy,fewer complications,shorter hospital stay,lower reoperation rate,etc.But the long-term efficacy for third-degree hemorrhoids is superior to the fourth-degree hemorrhoids.

As an emerging tumor therapy, high intensity focused ultrasound (HIFU) therapy has difficulty in controlling its dosage due to the complex human tissues. The dosage is related to the tumor such as its depth, size, characteristics and the tissue performances of its growth site. The existing cases are applied to establishing a repository with the above-mentioned parameters of the tumor analyzed. Then reasoning and self-learning are performed. So, the therapeutic dosage can be provided to the clinician when a new case occurs.

Objective To develop multimedia network testing system on"three-primary" Training.Methods Java was used to develop the application program,MySQL was used to establish database of test questions.The stable communication protocol(SOAP,Web service,etc.) and link were applied.Results With this system,random test questions and choices are provided;questions are answered by human-computer interaction;answer time is restricted;the paper is automatically scored;database of test questions is managed openly;test paper is automatically set.Conclusion This testing system is highly automatic,secure,impersonal,extensible,stable,open and efficient.

Objective To investigate the culture conditions of bone marrow stromal cells(MSCs) to form the tissue engineering cartilage. Methods The MSCs were obtained by the method of primary and passage culture in vitro.Chondrocytes derived from MSCs were obtained with high initial cell density subculture.The cells were cultured and transferred to the 3rd generation,and mixed with fibrin sealing(FS,5?10~6cells/ml).The conformation and growing feature of the tissue engineering cartilage were observed.Results The cultivated MSCs had shown evident reproductive activity and high rate of adherence.The histological results showed that cartilage matrix was stained positively for toluidine blue.Conclusion Chondrocytes can be derived from MSCs and form into the tissue engineering cartilage with FS.

Objective To observe the effect of Bobath approach applied in early stage on hemiplegia after cerebral infarction. Methods 174 cases of cerebral infarction were treated with Bobath approach and assessed using Fugl-Meyer Assessment (FMA) and Modified Barthel Index (MBI), and the patients who accepted rehabilitation within or over a month after stroke were compared. Results After treatment the scores of FMA and MBI were improved more in the patients within a month than those over a month(both P<0.01). Conclusion The Bobath approach is effective on the locomotor function and the activity of daily living in patients with cerebral infarction. The earlier it starts, the better the effect should be.