BACKGROUND:There are less reports on how to successfuly build the internal spatial configuration of tissue-engineered tooth scaffolds.
OBJECTIVE:To find a way to establish a series of three-dimensional digital modes for tissue-engineered tooth scaffold, such as CAD spatial configuration and Standard Template Library (STL) files.
METHODS:In order to get three-dimensional printing format of STL files, MICRO CT data of DICOM format were input into MIMICS and GEOMAGIC softwares, creating the outline of STL files. Then CATIA V5R17 software was used to create the three-dimensional digital mode of tissue-engineered tooth. Then, the overal model of the internal scaffold was obtained by arraying at the proper coordinates. Various overal scaffold configurations could be built rapidly by varying monomer configuration. The STL files of CAD model of three-dimensional printing tissue-engineered tooth were obtained by assembling the tooth outline mode and the internal scaffold.
RESULTS AND CONCLUSION: The CAD model was constructed successfuly, and this model could be directly used for three-dimensional printing rapid prototyping system to produce tissue-engineered tooth scaffolds. These findings indicate that the three-dimensional digital mode based on reverse engineering and positive engineering can be established, which can be used to quickly build a variety of internal spatial configurations of scaffold materials required for tissue-engineered teeth.

Eleven C21 steroids were isolated from chloroform extract of roots of Cynanchum otophyllumby silica gel, MCI, ODS columns, and semi-preparative HPLC. Their structures were determined by spectroscopic data analysis as otophylloside B(1), caudatin-3-O-beta-D-cymaropyranosyl-(1-->4)-beta-D-oleandropyranosyl-(1-->4)-beta-D-cymaropyranosyl-(1-->4)-beta-D-cymaropyranoside (2), caudatin-3-O-beta-D-oleandropyranosyl-(1-->4)-beta-D-oleandropyranosyl-(1-->4)-beta-D-cymaropyranosyl-(1-->4)-beta-D-cymaropyranoside (3), caudatin-3-O-beta-D-oleandropyranosyl-(1-->4)-beta-D-digitoxopyranosyl-(1-->4)-beta-D-cymaropyranoside (4), otophylloside O (5), gagamine-3-O-beta-D-oleandropyranosyl-(1-->4)-beta-D-cymaropyranosyl-(1-->4)-beta-D-cymaropyranoside (6), sinomarinoside B (7), mucronatosides C (8), wallicoside J (9), stephanoside H (10), and qinyangshengenin-3-O-beta-D-oleandropyranosyl-(1-->4)-beta-D-cymaropyranosyl-(1-->4)-beta-D-digitoxopyranoside (11). Among them, compounds 2-3, and 6-11 were separated from the roots of this plant for the first time.
Cynanchum ; chemistry ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Magnetic Resonance Spectroscopy ; Molecular Structure ; Plant Roots ; chemistry ; Steroids ; chemistry ; isolation & purification

Objective To explore the methods and clinical value of transrectal ultrasound (TRUS) in detecting rectal gastrointestinal stromal tumor(GIST) with head scanning probe.Methods A total of 12 patients had the ultrasonic examination through the rectum with the head scanning probe.Preoperative ultrasonic findings were compared with the pathological results.Results Of the 12 patients,the patients were divided into three groups,including 3 cases with low-degree severity,6 cases with moderate-degree severity and 6 cases with high-degree severity.The lymph node metastasis was not found near intestines.Rectal GIST appeared as a hypoechoic mass with clear limit、regular form and expanded growth under TRUS.The CDFI showed abundant flow in the tumor and TRUS had an overall accuracy rate of 75.0%(9/12)in the diagnosis of rectal GIST.The accuracy of TRUS in the staging diagnosis of rectal GIST was 83.3%(10/12).Conclusion The TRUS with the head scanning probe is of great value for pre-operative diagnosis and staging of rectal GIST.Rectal water window and felicitous check-up technique can enhance the accuracy of TRUS.

Objective To study the clinical value of color Doppler ultrasonography in typing tuberculous epididymitis.Methods The appearances of color Doppler ultrasound and the findings on operation were analysed in 33 patients with tuberculous epididymitis.Results Of the 33 patients,epididymis appeared as diffusely and heterogeneously enlarged lesions with increased flow in 2 cases,appeared as nodular lesions in 13 cases including nodi with echofree space in 3 cases, nodi with high-level echo patches in 3 cases, and low echo-level nodi in 7 cases. Multiple lesions in scrotum were detected in 17 cases, of whom epididymis up to 11 cases appeared as diffusely enlarged heterogeneous lesions with flow increased.The sonographic appearancs of tuberculous epididymitis could be divided into 3 types:diffusion type, nodus type and complicated type. Nodus type included 3 subtypes: purulence type, calcification type, and cheese type.The accuracy rate of ultrsound diagnosis was 87.9%.Conclusions Testis is easy to be involved when epididymitis appears as diffusion type, so surgical treatments should be early.Purulence type and complicated type need surgical treatments while calcification type does not. Antituberculous drug treatments can be tried before surgical treatments in cheese type.Sonography of urinary system is helpful for the diagnosis of asymptomatic tuberculosis in urinary system when tuberculous epididymitis is first suspected on sonography.

OBJECTIVETo evaluate the clinical efficacy of syndrome differentiation-based treatment with traditional Chinese medicine (TCM) versus losartan therapy in addition to basic treatment for management of proteinuria in patients with chronic kidney disease.

METHODSThis multicenter, randomized, and case-controlled clinical trial was conducted among 81 consecutive patients meeting the inclusion criteria. The patients were randomized consecutively to receive TCM treatments according to the syndrome patterns in TCM (spleen and kidney Qi and Yin deficiency, and spleen and kidney Qi and Yang deficiency, n=60) or oral losartan therapy (50 mg/day, n=21) in addition to the basic treatments. All the patients were followed up for 24 weeks to observe the clinical effects.

RESULTSThe patients in TCM group showed a significantly higher overall response rate (93.33%) than those in losartan group (76.20%, P<0.05). The TCM score in the two groups were all decreased at week 24 as compared with baseline (P<0.01 or P<0.05). The TCM scores in both groups decreased significantly after the treatments as compared with the baseline scores (P<0.05). After a 8-week-long treatment, Scr, eGFR and Cys-C, U-Pro/24 h, and MA/Cr all decreased significantly in TCM group (P<0.05) but showed no significant changes in losartan group (P>0.05).

CONCLUSIONSyndrome differentiation-based TCM treatment in addition to basic treatments can produce satisfactory therapeutic effects on proteinuria in patients with chronic kidney disease by improving the clinical symptoms, reducing TCM symptom scores and proteinuria, and protecting the renal functions.

Adult ; Aged ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Losartan ; therapeutic use ; Male ; Medicine, Chinese Traditional ; methods ; Middle Aged ; Phytotherapy ; Prospective Studies ; Proteinuria ; drug therapy ; etiology ; Renal Insufficiency, Chronic ; complications ; drug therapy

Objective To find out the relationship of ecological environment protection and the transmission of Lyme disease under economic development of western regions in China.Methods Both scene molecular and traditional epidemiological methods were used to assess the effects of environmental protection on the transmission of Lyme disease.Results Among areas as protected natural forests,semiprotected nursery forests and farmland,the vector tick species and reservoir rodents from protected natural forests area had the highest quantity of population and diversity index and followed by semi-protected nursery forests.Vector competence of reservoir hosts and value of natural foci from protected natural forests area were also remarkably higher than those areas of semi-protected nursery forests and farmland. Staff working in the areas who were bitten by ticks from protected natural forests areas had higher serological Dositive rate(66.7%)than those from semi-protected nursery forests areas(2.5%),and both showed remarkable difference(P=6.45,E-11＜0.01,df=1).The difference of genetic divergence among these subpoPulations from different habitats being surveyed showed that the biggest genetic divergence index (Fst)of 0.557 42 was between protected natural forests area and farmland area.The index between semiprotected nursery forests area and farmland area was also bigger than zero with statistical significance.The genetic divergence index of 0.108 02 between semi-protected nursery forests area and protected natural forests area was the lowest which showed that genetic divergence between the subpopulations of the two sampling areas was not obvious.The genetic distance among these subpopulations had similar change along with their habitats.Conclusion Under economic development of western regions in China,when programs as natural forests protections,recovery prairie and grassland from farmland were actively performed,vectors insects and reservoir hosts of Lyme disease might also be protected to some degree but the risk and value of natural foci on Lyme disease might increase.Data suggested that people entering these areas should be told to strengthen their awareness on individual protection against the disease.

Objective To design an anesthesia information management system and apply it preliminarily so as to facilitate informatized anesthesia.Methods The system was developed with C/S architecture,thin clients distributed in all operating rooms as well as the terminals in postanesthesia care units and management office.Trial of the system was carried out in Chinese PLA General Hospital,and solutions were put forward for the problems during the trial.Results The system enhanced anesthesiology in clinical use,scientific research,teaching and management,though some defects still existed due to its development level.Conclusion The system promotes hospital informatization greatly,and has practical values.

OBJECTIVETo observe the therapeutic effect of Yishen Qingre Huashi Recipe (YQHR) in treating proteinuria of chronic glomerular disease patients with Pi-Shen deficiency complicated damp-heat syndrome (PSDCDHS).

METHODSTotally 121 stage 1 -2 primary chronic glomerular disease patients with PSDCDHS were randomly assigned to the treated group (85 cases) and the control group (36 cases) according to 2:1. All patients received conventional and symptomatic treatment. Patients in the treated group took YQHR additionally, while those in the control group took Losartan Potassium Tablet (50 mg each time, once per day) additionally. The therapeutic course for all was 6 months. Changes of 24 h urine protein, blood urea nitrogen (BUN), serum creatinine(SCr), and estimated glomerular filtration rate (eGFR) were observed at different time points. And the difference in therapeutic effects were compared between the two groups.

RESULTSCompared with the control group after 6 months of treatment, 24 h urine protein obviously decreased in the treated group (P <0. 05). There was no statistical difference in SCr, BUN, or eGFR between the two groups after 6 months of treatment (P >0. 05). The total effective rate after 2, 4, and 6 months of treatment in the treated group was 77. 6% (66/85 cases), 82. 4% (70/85 cases), and 89. 4% (76/85 cases), respectively. They were 47. 2% (17/36 cases), 55. 6% (20/36 cases), and 61. 1% (22/36 cases) in the control group, respectively. Compared with before treatment in the treated group, the total effective effect after 6 months of treatment was higher than that after 2 months of treatment (χ2=4. 28, P <0. 01). Compared with the control group at the same time points, the total effective rate in the treated group after 2, 4, and 6 months of treatment was higher (χ2=10. 87, 9. 53, 13.16, P <0. 01).

CONCLUSIONYQHR could significantly lower proteinuria in chronic glomerular disease patients with PSDCDHS, improve the clinical effect, thereby providing clinical evidence for treating chronic glomerular disease proteinuria from resolving dampness and clearing heat.

Blood Urea Nitrogen ; Drugs, Chinese Herbal ; therapeutic use ; Hot Temperature ; Humans ; Kidney Diseases ; complications ; therapy ; Kidney Glomerulus ; pathology ; Losartan ; Medicine, Chinese Traditional ; Phytotherapy ; Proteinuria ; etiology ; therapy ; Syndrome ; Tablets

OBJECTIVETo compare the impact of unilateral acute testicular ischemia on the hemodynamics and histology of the contralateral testis of the rabbits under consistent anesthesia with that of the rabbits in the conscious state.

METHODSForty-two healthy male white rabbits were randomly divided into an anesthetic group (Group A) to receive injection of sodium pentobarbital (PS) and a non-anesthetic group (Group B), each including a control group of 5 animals (A0 and B0), an incomplete testicular ischemia group of 8 (A1 and B1), and a complete testicular ischemia group of 8 (A2 and B2). Testicular ischemia models were constructed by color Doppler ultrasonography. Contrast-enhanced ultrasound (CEUS) was used to observe the perfusion of the contralateral testes before and after ligating and loosening the unilateral spermatic cord in each experimental group. The control animals also underwent CEUS and measurement of the heart rate (HR) and blood pressure (BP) at the corresponding time. Histological structure changes in the contralateral testes of the rabbits were observed in both anesthetic and conscious states.

RESULTSPS anesthesia markedly suppressed the HR and BP of the rabbits. The parameters in Groups of A0, A1 and A2 showed no statistically significant changes after unilateral ligation of the spermatic cord, while Groups B1 and B2 displayed significantly decreased peak-base difference (PBD) and prolonged arrival time (AT) and half time of descending peak intensity (HT). Groups A1, B1 and B2 showed significantly increased PBD and prolonged HT shortly after loosening the spermatic cord. Focal pathological and ultrastructural changes were observed in the contralateral testes of the ischemic rabbits, but no significant difference was found in Johnson's score in comparison with the controls. The apoptotic cells were remarkably increased in Groups A1, B1 and B2.

CONCLUSIONAcute testicular ischemia may induce injury to the contralateral testis to some degree, and a reflexive sympathetic response may cause hemodynamic changes in the non-anesthetic state. And the neural and vascular inhibitory effects of anesthesia could make insignificant changes of blood perfusion in the contralateral testis.

Animals ; Disease Models, Animal ; Ischemia ; diagnostic imaging ; pathology ; Male ; Rabbits ; Reperfusion Injury ; diagnostic imaging ; pathology ; Testicular Diseases ; diagnostic imaging ; pathology ; Testis ; blood supply ; diagnostic imaging ; pathology ; Ultrasonography

OBJECTIVETo discuss the correlation of ultrasonographic grading of varicocele (VC) with the changes of seminal parameters after varicocelectomy.

METHODSA total of 129 cases of VC were diagnosed by scrotal color Doppler ultrasonography (CDU) and graded into 3 groups: VC I, VC II and VC III, according to three different grading indexes: the regurgitant volume of pampiniform plexus veins (PPV), the maximum diameter of PPV and the combination of the regurgitant volume and the maximum diameter of PPV. All the patients underwent high ligation of the spermatic vein and semen analysis was performed before and after varicocelectomy according to the WHO guidelines.

RESULTSWith the maximum diameter of PPV as the grading index, there were statistically significant differences in the seminal parameters of VC III (P < 0.05) but not in those of VC I and VC II (P > 0.05) before and after varicocelectomy, while based on the regurgitant volume of PPV or the combination of the regurgitant volume and the maximum diameter of PPV, the differences were insignificant in VC I (P > 0.05), significant in VC II (P < 0.05) and extremely significant in VC III (P < 0.01). No significant differences were found in the rate of sperm abnormality among the 3 groups after varicocelectomy (P > 0.05).

CONCLUSIONDifferent grading indexes influence the changes of seminal parameters after varicocelectomy. The regurgitant volume of PPV and the combination of the regurgitant volume and the maximum diameter of PPV are more reasonable and reliable as the grading indexes of VC. Different grades of VC respond differently to varicocelectomy. Whether VC I necessitates varicocelectomy needs to be further investigated.

Adult ; Humans ; Male ; Semen ; cytology ; physiology ; Sperm Count ; Sperm Motility ; Ultrasonography, Doppler, Color ; methods ; Varicocele ; diagnostic imaging ; physiopathology ; surgery