Equipment Failure ; Humans ; Nickel ; Root Canal Preparation ; instrumentation ; Titanium

Objective To investigate the imaging characteristics of lymphoscintigraphy in postoperative breast cancer patients and evaluate its diagnostic value in breast cancer-related lymphedema (BCRL).Methods Seventy-nine breast cancer patients who underwent mastectomy and axillary lymph node dissection were studied. Patients ( n = 158 ) were divided into the study ( affected arms, n = 79 ) and control groups ( contralateral arms, n = 79). After subcutaneous injection of 99Tcm-dextran via the first interphalangeal space, lymphoscintigraphy was performed at 10 min, 1,3, 6 h respectively. Sensitivity and specificity of lymphoscintigraphy for detection of BCRL were calculated. Results There were significant differences in the amount of visualized lymph nodes, lymphatic integrity and backflow pattern between the two groups.Lymphatic drainage was preserved in 96.2% (76/79) of the contralateral arms and only 5.1% (4/79) of affected arms. 87.3% (69/79) and 74.7% (59/79) of control arms had ≥2 lymph nodes in axilla and supraclavicular regions, respectively; while none ( 0/79 ) and 5.1% (4/79) of the affected arms had ≥ 2lymph nodes in both regions, respectively. Four backflow patterns of radiotracer in subcutis were observed in the affected arms: normal (2.5% , 2/79), dilatated (55.7%, 44/79), diffused (36.7%, 29/79) and without backflow (5.1%, 4/79 ). The sensitivity and specificity of "lymphatic integrity" and "backflow pattern" on lymphoscintigraphy for detecting BCRL were 97.5% (77/79) and 96.2% (76/79), 94.8%(73/77) and 100.0% (81/81), respectively. Conclusion Lymphoscintigraphy is a noninvasive, accurate and effective imaging modality for the evaluation of BCRL.

Hide melting presents itself as one of the most critical processes in the production of donkey-hide gelatin. Here a NIR-based method was established for the rapid analysis of in-process hide melting solutions as well as for end-point determination of this process. Near infrared (NIR) spectra of hide melting solutions were collected in transflective mode. With the contents of total nitrogen determined by the Kjeldahl method as reference values, partial least squares regression (PLSR) was employed to build calibration models between NIR spectra and total nitrogen. Model parameters including wavelength range and PLS factors were optimized to achieve best model performance. Based on the contents of total nitrogen predicted by calibration model, end point of hide melting was determined. The constructed PLS model gave a high correlation coefficient (R2) of 0.991 3 and a root mean square error of prediction (RMSEP) of 0.807 g x L(-1). With the predicted total nitrogen and predefined limit, decisions concerning the proper times of melting were made. This research demonstrated that NIR transflectance spectroscopy could be used to expeditiously determine the contents of total nitrogen which was subsequently chosen as the indictor for determining the end-point of hide melting. The proposed procedure may help avoid unnecessary raw material or energy consumption.
Animals ; Calibration ; Endpoint Determination ; methods ; Equidae ; anatomy & histology ; Gelatin ; chemistry ; Least-Squares Analysis ; Nitrogen ; analysis ; chemistry ; Skin ; chemistry ; Spectrophotometry, Infrared ; Time Factors ; Transition Temperature

Objective To investigate the effect and mechanisms of recipient-derived immature dendritic cells(imDC) transfected with IKK2dn and loaded with donor antigen on renal allografts survival in the rats.Methods DC were cultured from recipient rats'(Lewis) bone marrow,transfected with IKK2dn and loaded with donor antigen.The expression of CD86 and MHC Ⅱ was detected,and the ability of DC stimulating lymphocyte proliferation in vitro was measured.Male Brown Norwav rats and Lewis rats were used as donors and recipients respectively.Four groups were set up(DC group,empty transfection group,transfection group and control group),receiving 1×10~7 DC,Adv-0-DC,Adv-IKK2dn-DC loaded with BN antigen,and equal volume of normal saline,respectivelv 7 davs before transplantation.In the third party donor-group,Wistar rats as donors were treated the same as DC;group before transplantation.After transplantation,the T lymphocyte proliferation in reciPients was measured and the expression of serum IL-2 and IFN-γ was detected.The survival time of recipients and the acute reiection were observed.Pathological changes were examined tO identify the grade of rejection.Results DC assessment in vivo revealed that the transfected DC could still express CD86 and MHC Ⅱ in a low level as compared with those not transfected with IKK2dn. After DC were loaded with donor's antigen,the expression of CD86 and MHC Ⅱ was up-regulated.After DC were transfected with IKK2dn before loaded with donor's antigen, the expression of CD86 and MHC Ⅱ had no significant change. When DC were loaded with donor's antigen, its allostimulatory activity of T lymphocyte proliferation was enhanced (P<0. 05). When DC were transfected with IKK2dn before loaded with donor's antigen, its allostimulatory activity of T lymphocyte proliferation was not enhanced. Compared with control groups, IKK2dn-transfected DC pulsed with BN splenocyte lysate markedly prolonged the survival of renal allografts (26. 8±1.76d, P<0.01), and elicited markedly lower proliferative responses and reduced IL-2 and IFN-γ production. The pathological grade of rejection was low in the transfection group. Conclusion Recipient-derived imDC transfected with IKK2dn and loaded with donor splenocyte lysate could prolong the renal allograft survival in rats probably by down-regulating the expression of DC costimulatory molecules and inhibiting the T_H 1 cytokine production.

Objective To evaluate the lymphoscintigraphic imaging characteristics for the patients with lower limb lymphedema and to establish a novel grading system for the injury to lower limb lymphatic system. Methods One hundred and sixty six consecutive patients (332 lower limbs) with lower limb lymphedema after surgical and(or) radiotherapy treatment for gynecological cancer were recruited into this retrospective study. The lymphoscintigraphy studies were performed after subcutaneous injection of 111～185 MBq (0. 1～0. 15 ml) of 99Tcm-DX into the webbed space between the first and second toes of both feet. Based on the integrity of lymphatic vessel and the extension of dermal diffusion on lymphoscintigram,the lymphatic injury to the lower limb was graded as 0, 1,2 and 3 respectively. The lymphedema of the limb was staged as 0, Ⅰ , Ⅱ a, Ⅱ b, Ⅲ by the standard of Consensus Document of the International Society of Lymphology (ISL). Chi square test was carried out to validate the established grading system for the assessment of the injury to the lower limb lymphatic system. Results The lymphoscintigraphic imaging characteristics included lymphatic blockage, dermal backflow, no visualization of lymphatic or lymph node, lymphocele and lymph fistula in the lower limb, pelvis and abdomen. There were 65 (19.6%), 71 (21.4%),131 (39.5%), 62 (18.7%) and 3 (0.9%) limbs staged as 0, Ⅰ , Ⅱa, Ⅱb, and Ⅲ for lymphedema while 36(10.8%), 79(23.8%), 116(34.9%) and 101 (30.4%) limbs graded as 0, 1, 2, and 3 for lymphatic injury. There was a statistically significant correlation between the grading methods (χ2 =313.483, P <0.001). The patients who underwent radiotherapy had a higher incidence rate of grade 2 and 3 (70.5%, 158/224) than those who underwent surgery (53.6%, 59/108) (χ2 = 9.662, P = 0.022).The patients with erysipelas had a higher incidence rate of grade 3(73.1%, 38/52) than those without erysipelas (43.9%, 50/114) (χ2= 12.238, P<0.001). The incidence rate of grade 3 increased with the duration of lymphedema after treatment: 36.6% (34/93) for less than 1.5 years, 72.3% (34/47) for between 1.5 to 5 years, and 76.9% (20/26) for more than 5 years (χ2 = 23.123, P<0.001). The grade of lymphatic injury showed no significant difference among 3 types of gynecological cancers (χ2 = 4.000, P =0.676), or between the patients with and without chemotherapy (χ2 =0.411, P=0.938). Conclusions Lymphoscintigraphy is a reliable modality to diagnose lower limb lymphedema after treatment for gynecological cancer. The injury grading system could provide objective assessment of the lymphatic damage.

OBJECTIVETo compare the initial penetration depth of nickel-titanium (NiTi) and stainless-steel (SS) spreader during lateral compaction and the quality of the seal in curved canals.

METHODSForty extracted mandibular premolars with a single curved canal were divided into two groups: no more than 20 degrees and more than 20 degrees based on degree of curvature. All canals were instrumented using a rotary instrumentation technique. NiTi and SS spreaders were used to obturate the canals containing a master cone while the penetration depths were measured. Horizontal sections were cut in 2 and 4 mm from the apex and photographed under stereomicroscope. The percentage of gutta-percha-filled are (PGP) of cross-sections was measured using an image analysis program.

RESULTSIn canals of more than 20 degrees, the penetration depths and PGP of 2 mm from the apex of NiTi spreaders were higher than SS spreader. In canals of no more than 20 degrees, there were no significant difference between them (P > 0.05). At 4 mm from the apex, there was no significant difference between two groups.

CONCLUSIONNiTi spreaders has a higher penetrated depth and obturation density than SS spreaders in severed curved canals.

Gutta-Percha ; Humans ; Nickel ; Root Canal Obturation ; Stainless Steel ; Titanium

UNLABELLED(GPL) in patients suffered from chronic atrophic gastritis (CAG) differentiated as Pi-deficiency with damp-heat retention and blood stasis in TCM Syndrome differentiation.

METHODSSixty-eight patients fitting to the admission criteria were randomly divided into two groups, 36 patients were treated with KWG in the treated group and 32 were treated with Weifuchun in the control group, all were treated for 2 treatment courses (12 weeks as one course).

RESULTSThe curative effects on gastroscopy and pathologic changes in the treated group were significantly superior to those in the control group (P < 0.05). The comparison of clinical efficacy, symptom improvement, anti-Helicobactor pylori effect between the two groups was insignificantly different (P > 0.05).

CONCLUSIONKWG is an effective drug for GPL.

Adult ; Diagnosis, Differential ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Gastric Mucosa ; pathology ; Gastritis, Atrophic ; drug therapy ; pathology ; Humans ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Phytotherapy ; Precancerous Conditions ; drug therapy ; pathology

OBJECTIVETo investigate root canal curvature in maxillary anterior teeth.

METHODSAbout 400 human maxillary anterior teeth were examined by indirect digital radiography both from labiolingual and mesiodistal directions. The root canal curvature was analyzed.

RESULTSThe major sort of maxillary anterior teeth was type I. The proportion of maxillary center incisors, maxillary lateral incisors, maxillary canines curved in mesiodistal were 11.17%, 16.19% and 21.43%, in labio-lingual were 39.59%, 40.00% and 29.59%, both in labiolingual and mesiodistal directions were 4.60%, 35.24% and 24.49%. About 50% of maxillary anterior teeth were moderate curve, the degree of root canal curvature of maxillary canines was larger than that of maxillary incisors, and radius of curvature and length of the curved part of root canal of maxillary canines were smaller than that of maxillary incisors.

CONCLUSIONRoot canal curvature in maxillary anterior is complex, especially in maxillary canine. In order to improve quality of root canal therapy, we need to understand types of root canal, degree of root canal curvature and radius of curvature completely.

Cuspid ; Dental Pulp Cavity ; Humans ; Incisor ; Maxilla ; Root Canal Therapy

OBJECTIVETo identify the affect of chronic low back pain on multifidus muscle atrophy and fatty infiltration.

METHODSFrom March 2010 to August 2013, a retrospective study were carried out in the department of orthopedics of patients with low back pain. Finally 31 cases were selected to this study including 19 males and 12 females with an average age of 36.4 years ranging from 23 to 55 years. The main symptoms of these patients were repeated back pain. Duration was more than 1 year. X-ray, CT, MRI showed no obvious abnormalities. The changes of net cross-sectional area of multifidus and T2 signal ratio of the same patient were measured at different time by MRI. VAS and Oswestry disability scores were recorded in two MRI examination. Correlation between these change of multifidus net area and T2 signal ratio in two times measurement and duration of low back pain, VAS, Oswestry disability scores were analyzed to find the affection of low back pain on paraspinal multifidus muscle.

RESULTSThe net multifidus cross-sectional area in same case by the second follow-up MRI is significantly smaller than that of the first follow-up, T2 signal ratio at second was significantly higher than that of the first (P < 0.05). The net cross sectional area of multifidus muscles reduced rate were positively correlated with VAS scores, duration and of Oswestry disabilitry scores (P < 0.001). The rate of increase in T2 signal ratio was not correlated with VAS scores,duration and the Oswestry disability scores (P > 0.05).

CONCLUSIONChronic low back pain is one of the most important reasons of paraspinal multifidus muscle atrophy and fatty. The duration, VAS and Oswestry disability scores of chronic low back pain were positively correlated with the multifidus muscle atrophy.

Adult ; Chronic Disease ; Female ; Humans ; Low Back Pain ; complications ; Male ; Middle Aged ; Muscular Atrophy ; diagnostic imaging ; etiology ; Paraspinal Muscles ; diagnostic imaging ; Radiography ; Retrospective Studies ; Young Adult

Objective　To explore the risk factors and causes affecting the operative mortality in esophagectomy patients with esophageal can cer. Methods　1400 cases with a curative esophagectomy for neopl asm of esophagus hospitalized from Mar,1973 to June, 2000 were reviewed. There w ere 31 died within 30 d or during hospitalization after esophagectomy as a group , and 1 369 survival cases, after operation, as another group. Sixteen factors t hat may influence the operational mortality were selected. A multi-variate anal ysis of these individual variables was performed by the computer′s logistic reg ression model. Results　The operative mortality was 2.2%(31/1400 ). The causes of death included respiratory complication 17 cases (including res piratory failure caused by pneumonia or atelectasis), 15 cases, and adult respir atory distress syndrome (ARDS) 2 cases, the mortality was 54.8% in the death gro up), anastomotic leak 11 cases (34.5%), Chylothorax 2 cases (6.5%) and postopera tive digestive tract hemorrhage 1 case (3.2%). The results showed that the major risk factors that affected operative mortality in cases with esophageal cancer were history of long-herm heavy smoking, duration of operation and the year of operational (P<0.05). Conclusion　To minimize operative mort ality of esophagectomy, some means must be noticed, including the reinforcemen t of the perioperative care, the improvement of anastomotic methods and surgical skill, reduing operative time as p ossible, disposing pulmonary complications in time and using respirator if neces sary.