BACKGROUND:Traditional studies on foot and ankle biomechanics have limitation. Ankle joint was complicated and had big range of motion, so it is difficult to establish finite element models and to analyze the type of fracture.
OBJECTIVE: To construct the finite element models of distal tibial fractures and analyze the stability.
METHODS: CT data of ankle were colected from a normal male volunteer and the three-dimensional reconstruction of volunteer was made by Mimics software, and the effectiveness was verified. The ratio of different joint involvement and height of fracture block were assumed with Solidwork software, and finite element models of distal tibial fractures were established. Fracture stability was analyzed by ANSYS software using finite element method.
RESULTS AND CONCLUSION:The distal tibia fracture model was consistent with the relevant literature data, and finite element analysis could be further conducted. The ratio of articular surface involved was positively associated with fragment height and fracture displacement, and negatively associated with fracture stability. These results indicate that the three-dimensional finite element models of distal tibial fractures were successfuly established. Fracture stability was associated with the ratio of articular surface involved and fragment height.

AIM: To explore the immunotheraptical drugs for multi-drug resistant pulmonary tuberculosis (MDR-TB). METHODS: 79 patients with MDR-TB were randomly assigned to two groups. 46 cases in M.vaccae group were treated with "3AkPaThLevL/15PaThLevL" and M. vaccae, and 33 cases in control group were treated only with "3AkPaThLevL/15PaThLevL". The clinical effect and T-lymphocyte subsets in patients were observed after being treated for 1,2 and 3 months, respectively. RESULTS: The sputum negative rates ((41.3)%, (63.0)%, and (80.4)%) and the X-ray resolution rates ((30.4)%, (50.0)%, and (67.4)%) of the M.vaccae group were superior to those ((12.1)%, (27.3)%, and (39.4)%, P

Objective To analyze the effect of different areas of paries medialis defect of femoral trochanter on the stability of fracture ends after percutaneous compression plating for femoral intertrochanteric fracture.Methods Thirteen preserved cadaveric specimens of adult femur were used in this experiment.The age of death ranged from 30 to 50 years.Oblique osteotomy was conducted under the same condition using a wire saw to create experimental models of fracture of Evans-Jensen type Ⅳ.The ratios of the area of paries medialis defect to the projected area of lesser trochanter in the specimens 1 to 13 were set respectively as 0,10.0％,14.5％,20.2％,23.4％,30.6％,45.8％,56.8％,76.8％,88.7％,99.8％,121.3％ and 149.4％.All the fractures were fixated by standard percutaneous compression plating.Cyclic load was applied on each specimen using Instron 2000 universal material tester.A vertical load of 600 N was applied for respectively 1,10,100 and 1,000 times to measure the displacements of proximal and distal fracture ends.Results When the ratio of the area of paries medialis defect to the projected area of lesser trochanter was 30.6％,the average displacements of the proximal and distal ends were 0.14 cm and 0.10 cm.When the ratio was 45.8％,the average displacement of the proximal end was 0.53 cm,278.6％ greater than that for 30.6％;the average displacement of the distal end was 0.41 cm,310.0％ greater than that for 30.6％.When the ratio was 149.4％,the average displacement of the proximal end was 0.93 cm,564.3％ greater than that for 30.6％;the average displacement of the distal end was 0.65 cm,550.0％ greater than that for 30.6％.Conclusions When the ratio of the area of paries medialis defect to the projected area of lesser trochanter reaches ＞ 45.8％,the area of paries medialis defect will have a significant effect on the stability of fracture ends after percutaneous compression plating for femoral intertrochanteric fracture.The displacement will increase linearly under the same compression with the increase in defect area.

OBJECTIVE:To observe the hepatoprotective effect of compound glycyrrhizin in treating patients with multidrug resistant pulmonary tuberculosis(MDR-TB).METHODS:A total of 68 MDR-TB cases were enrolled:36(treatment group) were randomly assigned to receive additional glycyrrhizin,and 32(control group) to receive additional glucurolactone and legalon,the hepatoprotective effects and side effects between 2 groups were compared before and after treatment.RESULTS:The total effective rates of the treatment group and the control group were 94.4% and 62.5%,respectively 1month after hepatoprotective treatment,and significant difference was noted between 2 groups(P0.05).CONCLUSION:Compound glycyrrhizin has a reliable hepatoprotective efficacy and few adverse drug reactions in treating MDR-TB patients complicating with lesion of liver function.

In a hospital, key disciplines are often regarded as the representative of service and reputation of the hospital. It is therefore of great significance to strengthen the construction of key disciplines to ensure sustainable development of the hospital in the increasingly fierce competition of medical market. This paper discusses how to strengthen construction of key disciplines from four aspects, namely, to increase the awareness of focal discipline construction among hospital staffs, and establish "brand awareness" ;to develop a team of high level professionals, and develop or introduce academic leaders; to improve academic research level and promote the technology progress ;and to strengthen management by objectives.

To investigate chemical constituents from Radix Pittospori, chloroform extract of the roots was subjected to column chromatography with various chromatographic techniques. The structures were elucidated on the basis of physico-chemical property and spectral analysis. Two triterpenoids were identified as 22-acetyl-21-(2-acetoxy-2-methylbutanoyl)-R1-barrigenol(1) and 3alpha-hydroxyl-20-demethylisoaleuritolic-14(15)-ene-28, 30-dioic acid (2). Compound 1 is a new triterpene and compound 2 is isolated from this plant for the first time.

Objective: To analyze the facial profile of the patients with congenitally missing 2 mandibular incisors, and to investigate the changes of facial profile of the patients before and after orthodontic treatment by extraction of 2 maxillary premolars. Methods: The cephalometrics of 64 patients with congenitally missing 2 mandibular incisors were collected. The initial cephalometrics of 64 patients were used to characterize the facial profile. A total of 38 cases among all the 64 patients underwent the orthodontic treatment by extraction of 2 maxillary premolars, and the initial and final cephalometrics were used to compare the changes of facial profile before and after treatment. The cephalometric measurement (including hard tissue and soft tissue items) was performed and the results were analyzed statistically. Results: Compared with the normal values, the overjet, overbite, ANB, U1-NA angle, face angle, Y axis, Pg-NB, face convexity, soft tissue facial angle, H angle, and men to labial sulcus to H-Line in the patients with congenitally missing 2 mandibular incisors were increase d, SNB, L1-NB angle, L1-NB distance, L1-MP, occlusal plane angle, mentolabial sulcus angle were decreased, and the differences were statistically significant (P<0. 05). After orthodontic extraction treatment, the overjet, overbite, U1-NA angle, U1-NA distance, U1-SN, H angle, and subnasale to H-Line of the patients were decreased, the L1-NB angle, L1-NB distance, L1-MP, occlusal plane angle, Pg-NB, and mentolabial sulcus angle were increased; the differences were statistically significant (P<0. 05). Conclusion: The mandibular development is insufficient but the chin development is adequate in the patients with congenitally missing 2 mandibular incisors, with larger overjet and overbite, lingually inclined mandibular incisors, deeper and sharper mentolabial sulcus. After treatment by extraction of 2 maxillary premolars, the overall appearance of the lateral profile of the patients remains unchanged, but the occlusion of anterior teeth is significantly improved.

Objective:To study the changes of oral health indexes in adolescent orthodontic patients under different brushing time, and to provide basis for the orthodontists to give effective dental health promotion in clinic.Methods:A total of 123 adolescent orthodontic patients were included, and they were divided into 1-3min, 3-5 min, 5-7 min and 7-10 min groups based on the brushing time recorded in the period of orthodontic treatment.The relationship between different brushing time and oral health indexes was evaluated 1,3,and 6 months after experiment, such as sulcus bleeding index(SBI),plaque index(PLI), debris index-simplified(DI-S) and enamel demineralization index(EDI).Results:Compared with 1-3 min and 3-5 min groups, the SBI, PLI, and DI-S of the patients in 5-7 min group were significantly reduced(P<0.05).There was no significant differences of SBI, PLI, DI-S , and EDI between 5-7 min group and 7-10 min group (P>0.05).Conclusion:Brushing teeth more than 5 min can improve the oral hygiene significantly and the best time is 5-7 min;the orthodontists should require the patients to brush teeth at least for 5 min.

ObjectiveTo evaluate the clinical effect of post bladder sparing surgery intra-arterial chemotherapy combined with intravesical chemotherapy for the treatment of T1G3 bladder urothelial carcinoma.MethodsSeventy-four T1G3 bladder cancer patients were enrolled in this study.After bladder sparing surgery,22 patients received intra-arterial chemotherapy combined with intravesical chemotherapy,while the other 52 patients were treated with intravesical chemotherapy only.There was no significant difference between the 2 groups in sex,age,the size and number of bladder tumor and newly diagnosed cases (P ＞0.05).Twenty-two patients were treated with intra-arterial chemotherapy of piarubicin or epirubicin (40 -60 mg)+ cisplatin (60 -80 mg) 2 or 3 weeks after bladder sparing surgery,3 times as a cycle,repeat every 4 - 6 weeks.All the patients received the same protocol of intravesical chemotherapy.With a median follow-up of 32 months,effects of combination therapy group were compared with intravesical chemotherapy group in the aspects of tumor-specific death rates,recurrent rate,progressive rate,recurrent interval and the adverse reactions.ResultsThe tumor-specific death rates of combination therapy group and intravesical chemotherapy group were 0％ (0/22) and 13.5％ (7/52),respectively.There was no difference between the 2 groups (P =0.096).The recurrent rates were 13.6％ (3/22) and 46.2％ ( 24/52 ) ； The progressive rates were 0％ (0/22) and 21.2％ (11/52).There were significant differences between the 2 groups in recurrent rate (P =0.000) and progressive rate (P =0.048 ).The recurrent intervals of the 2 groups were 15 months and 6.5 months.During the interval of intra-arterial chemotherapy cycle,12 patients suffered 1 -2 degree nausea and vomit,2 patients suffered hypoleukemia,2 patients suffered neutropenia,4 patients'liver function was impaired and 1 patient's renal function was impaired.All the adverse reactions were minimal and reversible.ConclusionsIntra-arterial chemotherapy combined with intravesical chemotherapy is effective in preventing T1 G3 bladder cancer from recurrence and metastasis after bladder sparing surgery.The adverse reactions of this protocol were minimal and reversible.