Small bowel obstruction via herniation through an iatrogenic defect of the falciform ligament following laparoscopic cholecystectomy

Internal herniation of the small bowel through a defect in the falciform ligament and subsequent small bowel obstruction is exceedingly rare with the majority of previous cases being attributed to congenital abnormalities. As laparoscopic techniques approach the forefront of modern surgery, an iatrogenic source for a falciform ligament defect has emerged over the last decade. In this case, a 50-year-old patient presented with signs of acute small bowel obstruction 10 days after a laparoscopic cholecystectomy. On diagnostic laparoscopy, part of the jejunum was found to have herniated through an opening in the falciform ligament. This was likely to have been caused by trauma during the cholecystectomy. Following relief of the obstruction, the defect was closed with polyglactin sutures.     

Bezoar: an Unusual Palpable Mass in the Right Iliac Fossa

A 64-year-old gentleman presented with a 12-h history of right iliac fossa pain. On examination, the patient had a tender 8 × 6 cm mass in the right iliac fossa with localised peritonitis. The working diagnosis at this time was an appendix mass or caecal cancer. A computed tomography scan revealed the characteristic ‘bird''s nest’ appearance of a bezoar. On further questioning, the patient confessed to regularly ‘binging’ on grapes. The patient described passing the mass and his symptoms completely resolved. This appears to be the only documented case of a bezoar affecting the ascending colon.     

2种肠道准备制剂在结肠镜检查中的应用及护理

目的:比较口服健胃清肠合剂和大承气汤在结肠镜检查中的清洁效果及耐受程度。方法:将180例患者随机分为观察组、对照组各90例,观察组口服健胃清肠合剂,对照组口服大承气汤。观察肠道清洁程度及耐受程度。结果:肠道清洁率观察组为95.6%,对照组为93.3%,2组比较差异无统计学意义(P0.05)。观察组的耐受程度优于对照组,2组比较差异有统计学意义(P0.05)。结论:健胃清肠合剂在结肠镜检查中清洁度、耐受程度高。     

桩腔预备后剩余充填材料封闭根管能力的实验研究

目的:采用葡萄糖微渗漏模型检测桩腔预备后剩余充填材料封闭根尖的能力。方法:选取70颗单根管上颌前牙,随机分为4个实验组和2个对照组。采用逐步后退技术预备根管,AHp lus糊剂和牙胶尖侧向加压充填根管,然后G钻进行桩腔预备。实验组根管内剩余充填物长度分别为3、5、7、10 mm。用葡萄糖微渗漏模型检测第1、2、3和4周根管冠根向渗漏出的葡萄糖量。结果:实验第1周各组的葡萄糖微渗漏值无显著性差异(P>0.05),第2周起,第1组的微渗漏值高于第3、4组(P<0.05),而第1、2组之间无显著性差异(P>0.05)。结论:在保证桩核固位的前提下,应尽量多的保留根管内剩余充填物的长度。     

根管预备并发症及充填质量的临床评价

目的：对根管预备并发症及充填质量进行临床评价。方法：从Digora图像系统中抽取我科2002—04—05所完成的根管治疗病例805例，分别对前牙、前磨牙和磨牙根管预备并发症的发生和充填质量进行分析。结果：形成台阶和侧穿的比例在前磨牙分别为4％，而在磨牙中则分别为33％和5％。前牙、前磨牙和磨牙适充的比例分别为74％、69％和50％。结论：磨牙根管预备和充填的质量仍有待进一步提高。     

Determination of root canal curvatures before and after canal preparation (part II): A method based on numeric calculus

The aim of this paper is to present a new method based on numeric calculus to provide data on any type of root canal curvature at any point of the long axis of the canal. Twenty severely curved, simulated root canals were prepared with rotary FlexMaster and Profile instruments in the crown-down technique and manually in the step-back technique. The inner and outer curvatures were registered in a system of coordinates before and after preparation in increments of 0.5 mm. Using an equalising function, the curvatures were first represented in graphic and algebraic form. The maximum and the mean curvature as well as the length of the arc from the apical foramen to the point of maximum curvature were determined mathematically. An increase in maximum curvature was registered for all four shaping systems investigated. The radius of the inner curvature decreased by 0.5-1.2 mm in the manual systems as a result of the preparation. The Profile system displayed the smallest changes in radius (-0.9 mm) even with the outer curvature, and manual preparation with stainless steel files the most pronounced change (-1.8 mm). The point of maximum curvature at the inner curvature was displaced by 1.6 mm to the apical foramen through manual preparation with Ni-Ti files. At the outer curvature, the maximum displacement (1.8 mm) recorded was also the result of preparation with Ni-Ti hand files, while a displacement of only 0.3 mm to the apical foramen was recorded with the other systems. The method offers a means of determining curvatures precisely without random specification of reference points. The method is also capable of registering only minor changes in curvature in the two-dimensional long axis of the canal.     

两种旋转镍钛器械根管预备效果的临床观察

目的对比评价两种设计特点不同的旋转镍钛器械Hero642和Pro Taper的临床成形效果。方法随机选择需要做根管治疗的磨牙100例，分为两组，分别采用两种旋转镍钛器械Hero642和ProTaper预备根管，采用冠向下预备方法。冷侧压方法充填。评价器械损耗、预备时间及成形效果。结果ProTaper器械折断3支，Hero642折断1支；Hero642组预备时间稍短于ProTaper组，两组均能形成较好的根管流畅度（P〉0．05），但ProTaper预备后根管锥度优于Hero642组（P〈0．05），根尖止点清楚。结论ProTaper用于磨牙根管预备的成形效果优于Hero642。但Hero642具有成本低、安全性好、操作易掌握的优点。     

硼酸铝（9Al2O3.2B2O3）晶须的制备和性质

目的：制备硼酸铝晶须及测其物理化学特征。方法：原料在电炉中加热至１１５０℃，４ｈ，获得的晶须采用化学方法确定其组成，物理化学方法检测其表征。结果：获得了晶须的化学组成、Ｘ射线粉末衍射图、ＦＴ－ＩＲ光谱和Ｒａｍａｎ光谱图。结论：制备的晶须为四硼酸十八铝。     

全冠牙预备体表面涂布极固宁TM后对其固位力的影响

目的探讨涂布极固宁TM后对全冠固位力的影响。方法制作面聚合度(TOC)为10°和20°的全冠牙预备体各10个,随机分为实验组和对照组。每组TOC10°和20°的全冠牙预备体各5个。制作铸造全冠20个。实验组涂布极固宁TM后玻璃离子黏固剂黏固全冠,对照组直接玻璃离子黏固剂黏固全冠。材料实验机上测两组全冠拉脱时的最大拉力值。扫描电镜观察表面并能谱仪分析。结果TOC为10°的实验组全冠和对照组全冠拉脱时的最大拉力值分别为(443.59±74.20)N和(509.07±69.05)N,两组间的差异无统计学意义(P=0.056);TOC为20°时实验组和对照组全冠拉脱时最大拉力值分别为(291.57±49.27)N和(390.82±91.44)N,两组间的差异有统计学意义(P=0.009)。结论TOC为10°的牙预备体表面经极固宁TM处理后对玻璃离子黏固剂黏固的全冠的固位力没有影响;而TOC为20°时牙预备体表面经极固宁TM处理后的固位力显著下降。     

Atomic analysis and knoop hardness measurement of the cavity floor prepared by Er,Cr:YSGG laser irradiation in vitro

In the present study, the compositional changes and knoop hardness of the cavity floor prepared by Er,Cr:YSGG laser irradiation was compared with that of the conventional bur cavity. Fifteen laser and 15 bur cavities were cross-sectioned, and subjected to atomic analysis by SEM-EDX and knoop hardness test. Statistical analyses were performed using the Mann-Whitney U-test; a value of P < 0.01 was considered significant. Surface characteristics of the prepared cavities were also investigated by light microscopy and scanning electron microscopy (SEM). The results showed that the quantities of Ca (Ca weight %) and P (P weight %) were increased significantly in the laser cavity floor but no significant differences were found between the Ca/P ratio and knoop hardness number of laser and bur cavities. The SEM observation revealed that the lased cavity surface was irregular and there was also the absence of a smear layer; the orifice of dentinal tubules was exposed. Er,Cr:YSGG laser device is considered as one of the most effective and safe devices for cavity preparation because of its many advantages. This includes easy delivery system, minimal thermal damage to the surrounding tissues, minimal thermal-induced changes of dental hard tissue compositions, and favourable surface characteristic.