Laparoscopy for Small Bowel Obstruction Caused by Single Adhesive Band

Methods:A total of 62 patients were enrolled. The OT group underwent laparoscopy (n = 16), and the CT group (n = 46) did not. We compared early and late outcomes between the 2 groups.Results:Times to first flatus, oral intake, and defecation after treatment were shorter in the OT group (P = .030, .033, and .024), and the recurrence rate was lower in the OT group than in the CT group (6.2% vs 32.6%; P = .038). Time from discharge to first recurrence was longer in the OT group than in the CT group (172 vs 104.6 ± 26.5 days, P = .027).Conclusions:SBO related to a single adhesive band is not effectively treated by CT. However, laparoscopic OT provides notable success if the surgery is performed early. Therefore, it should be the preferred treatment.     

Effect of Mineral Trioxide Aggregate Surface Treatments on Morphology and Bond Strength to Composite Resin

Introduction

The aim of this study was to evaluate the micromorphologic changes that accompany different surface treatments on mineral trioxide aggregate (MTA) and their effect on the bond strength to the composite resin with 4 adhesive systems.

Methods

Three types of MTA cement, ProRoot MTA (WMTA) (Dentsply, Tulsa, OK), MTA Angelus (AMTA) (Angelus, Londrina, PR, Brazil), and Endocem MTA (EMTA) (Maruchi, Wonju, Korea), were prepared and stored for a week to encourage setting. Surface treatment was performed using phosphoric acid or self-etch primer, and an untreated MTA surface was prepared as a control. The surface changes were observed using scanning electron microscopy. MTA surfaces were bonded with 4 adhesive systems, including Scotchbond Multipurpose (3M ESPE, St Paul, MN), Single Bond 2 (3M ESPE), Clearfil SE BOND (Kuraray, Osaka, Japan), and AdheSE One F (Ivoclar Vivadent, Schaan, Liechtenstein), to evaluate the adhesive effectiveness of MTA followed by composite resin restoration. The shear bond strength of the polymerized specimens was tested.

Results

For WMTA and AMTA, untreated surfaces showed an irregular crystalline plate with clusters of globular aggregate particles. For EMTA, the untreated surface presented a reticular matrix with acicular crystals. After surface treatment, superficial crystalline structures were eroded regardless of the MTA cement and adhesive system used. WMTA bonded significantly more strongly than AMTA and EMTA, regardless of the adhesive system used. In the WMTA and AMTA groups, AdheSE One F showed the highest bond strength to the composite. For EMTA, no significant differences were found across adhesive systems.

Conclusions

Acidic treatment of the MTA surface affected the micromorphology and the bond strength to the composite. Within the limitations of this study, using a 1-step self-etch adhesive system might result in a strong bond to WMTA when the composite resin restoration is required over MTA cement.     

光固化胶粘剂性能的初步研究

目的：制备一种光固化纳米胶粘剂,对其性能进行初步研究。方法：正交法制备出多个胶粘剂样品,讨论各个因素对材料力学性能的影响,探索合适的配方比例和工艺参数。结果：光固化胶粘剂最优配比为引发剂Darocur1173含量占1％,纳米SiO2含量占50％,基质树脂与稀释单体（Bis—GMA：TEGDMA）的比例为1：1。结论：制备的光固化胶粘剂配方的综合性能最优,可应用于临床。     

Interlaboratory Comparison as a Source of Information for the Product Evaluation Process. Case Study of Ceramic Tiles Adhesives

In this study, the results obtained by 19 laboratories participating in 2 editions of the interlaboratory comparison (ILC) determining 2 properties of ceramic tiles adhesives (CTAs), i.e., initial tensile adhesion strength and tensile adhesion strength after water immersion following EN 12004, were analyzed. The results show that participating laboratories maintain a constant quality of their work. The use of z-score analysis, under ISO 13528, allows for classifying 89.5% to 100% of laboratories as satisfactory, depending on the measurement’s kind and edition. The remaining laboratories are classified as questionable. The investigation of the predominant mode of failure of the CTA’s samples tested in the two editions shows significant differences. From the perspective of laboratories, the goal of the ILC has been achieved. From the standpoint of a manufacturer who evaluates a product’s properties when placing it on the market, the results indicate the necessity of a particular treatment of the product evaluation process because the variability of the obtained results is significant. It increases the possibility of the product failing to meet the assessment criteria verified by the construction market supervision authorities. The manufacturer must consider all possible variations in the risk analysis, including the ILC results, to improve the assessment process of CTAs.     

不同粘接剂对烤瓷瓷面与金属托槽间剪切强度影响的体外研究

目的 研究不同粘接剂对烤瓷瓷面与金属托槽间剪切强度的影响.方法 40个烤瓷瓷面经打磨、氢氟酸酸蚀、冲洗干燥、硅烷偶联剂处理瓷面后,再根据使用粘接剂的不同分为A组:光固化复合树脂粘接剂、B组:单组份化学固化复合树脂粘接剂、C组:树脂改良型光固化玻璃离子粘接剂、D组:双组份化学固化复合树脂粘接剂.将40个金属托槽粘接于烤瓷瓷面,经水浴孵化24 h后测得样本剪切强度,并进行统计分析.结果 A组剪切强度大于其他组(P＜0.05),C组剪切强度小于B组(P＜0.05),D组与B、C组剪切强度差异无统计学意义(P＞0.05).结论 光固化复合树脂粘接剂可获得最大的剪切强度,树脂改良型光固化玻璃离子粘接剂对金属托槽与烤瓷瓷面的粘接效果欠佳.     

肥大细胞激活在术后肠梗阻神经免疫机制中的作用

术后肠梗阻(POI)是临床常见并发症,其发病机制复杂,一直是外科临床关注的焦点。除已知的神经反射抑制作用外,随着临床与基础研究的深入,炎性反应在本病发生、发展中的重要作用越来越受到重视,而由于肠操作激活肥大细胞成为炎性反应启动的关键,进一步导致巨噬细胞激活及白细胞聚集,加重肠肌层炎症并且与神经机制相互协同作用,从而不利于胃肠运动功能障碍的恢复。该文就肥大细胞在POI神经免疫机制中的效应与促炎过程的研究状况予以综述。     

组织胶注射治疗胃底静脉曲张破裂出血安全性及疗效分析

目的探讨内镜下组织胶注射急诊治疗门静脉高压导致胃静脉曲张破裂出血的安全性及疗效。方法 64例门静脉高压胃底静脉曲张急性出血患者行内镜下组织胶注射治疗,观察分析即时止血率、曲张清除率、并发症及其影响因素。结果即时止血率为100%（65/65）,术中、术后均无严重并发症出现。术后6个月曲张静脉完全消失率为30.8%（20/65）,基本消失率为41.5%（27/65）,部分消失率为26.2%（17/65）,无效率为1.5%（1/65）。GEV1与IGV1型患者疗效显著优于GEV2型（P〈0.05）。结论经内镜下注射组织胶急诊治疗门静脉高压胃底静脉曲张破裂出血止血效果好,再出血发生率低,疗效确切。     

Successful one-stage operation for completely obstructive colorectal carcinoma

We describe herein a new and successful method of performing a safe and steady one-stage operation for completely obstructive colorectal carcinoma. First, a long ileus tube is utilized to decompress the dilated proximal bowel preoperatively and irrigate the feces-loaded colon intraoperatively. Following this procedure, a standard resection with radical lymph node dissection is carried out without a diverting colostomy. We performed this procedure successfully in seven patients, none of whom developed any anastomotic leakage.     

Inclusion of an S-nitrosylating agent in the insufflating gas does not alter gastric activity in rats following pneumoperitoneum

Background We have previously shown that mixing the S-nitrosylating agent ethyl nitrite with carbon dioxide can attenuate pneumoperitoneum-induced decreases in splanchnic blood flow, but it was unclear if this agent would alter gastric function. This question was answered using rats by assessing gastric emptying and gastrointestinal transit times following gavage with radioactive chromium. Methods There were five experimental groups: absolute control, anesthesia control, and carbon dioxide alone or with 100 or 300 parts per million ethyl nitrite. The period of insufflation was 1 h, and all animals were euthanized 6.5 h after chromium administration. Results The mean amount of radioactivity remaining in the stomach ranged between 16% and 27% of the total administered; these differences were not statistically significant (p > 0.05). Modest differences in chromium distribution were identified in the gastrointestinal tract, but for all treatments, the peak amount of radioactivity was located in the distal portion. Location of the peak, expressed as a percentage of total tract length, varied between 70% and 85% (p = 0.366). Conclusions This study found no adverse effect of ethyl nitrite on postoperative gastric emptying or gastrointestinal transit time following pneumoperitoneum. The findings support continued assessment of the clinical utility of ethyl nitrite in the setting of laparoscopic surgery.