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目的评价4种黏结剂对氧化锆全瓷嵌体边缘微渗漏的影响。方法选取2012年8月佛山市禅城区向阳医院口腔科新鲜拔除的上颌第三磨牙40颗,随机分为A、B、C、D组,每组10颗,制备V类洞形。4组离体牙分别采用全酸蚀黏结剂AdperSinglebond2（A组）及自酸蚀黏结荆ClearFilSEBond（B组）、MultilinkSpnnt（C组）和AdperEasyOne（D组）黏结氧化锆全瓷嵌体,修复后离体牙经冷热循环后行2％亚甲基蓝染色,根管显微镜下观察各组微渗漏程度并进行比较。结果在铪壁,c组微渗漏明显高于A和B组,差异均有统计学意义（P〈0．05）;但与D组差异无统计学意义（P〉0．05）。在龈壁,c组微渗漏明显高于其他3组,差异均有统计学意义（P〈0．05）;而其他3组之间差异均无统计学意义（P〉0．05）。结论自酸蚀黏结剂ClearFilSEBond和AdperEasyOne的封闭能力较好,且较全酸蚀黏结剂操作简单方便,推荐临床使用。     

不同树脂嵌体材料边缘微渗漏的对比研究

目的：通过对比4种树脂嵌体材料的微渗漏大小,为临床树脂嵌体材料的选择提供参考.方法：40颗离体牙按嵌体备洞原则制备近中邻（牙合）Ⅱ类洞,随机分为4组,每组10颗.分别用Z350、P60、Ceramage、Solitaire 2制作嵌体后使用Adper Single Bond 2和Adper Rely X ARC进行粘结.经冷热循环500次品红染色后,金刚砂片平行于牙体长轴沿近远中方向将修复体纵向剖开2次,在体式显微镜下测量染料渗入轴壁、龈壁的深度.结果：4组树脂嵌体材料轴壁和龈壁均出现微渗漏.经单因素方差分析,不同树脂嵌体材料之间的轴壁（F=0.131）及龈壁（F=0.385）微渗漏差异无统计学意义（P＞0.05）;同材料组的龈方渗漏程度均显著高于轴壁,配对t检验显示差异有统计学意义（P＜0.01）.结论：从微渗漏深度大小来进行评价,4种树脂嵌体材料均是临床上制作树脂嵌体理想的材料;树脂嵌体与牙釉质粘结效果比牙本质好.     

The effect of inlay butterfly cartilage tympanoplasty technique on compliance

Conclusion: IBCT technique should be preferred owing to its high graft survival rate and ABG gain. While no significant difference was found in middle ear pressures between ears that underwent IBCT and normal ears, compliance values were found to be decreased in patients undergoing IBCT. However, the lack of correlation between ABG gain and compliance values indicated that compliance increase had no effect on post-operative ABG results. Objective: The aim of the present study was to compare tympanometric and audiological parameters in patients undergoing inlay butterfly cartilage tympanoplasty (IBCT) with their normal ears and to determine their difference with normal ear tympanometric parameters. Methods: Overall, 25 patients that underwent an operation between August 2010–May 2014 were included in the present study. In 13 of these patients, the ear that did not undergo operation was normal. 0.5, 1, 2, 4?kHz pure sound average values, tympanometric measurements and compliance values of normal and operated ears were compared. Results: The graft survival rate in patients was found to be 92%. Mean pre-operative air–bone gap (ABG) was 16.4?±?5.4 in patients, while mean post-operative ABG was 10.9?±?5.8, with a statistically significant difference (p?=?0.001) While there was no significant difference between operated and normal ears of patients in terms of middle ear pressure (0.441), compliance values were significantly higher in normal ears than those in operated ears (0.032). When post-operative ABG gain was compared with compliance values, no significant correlation was found between ABG gain and compliance measurements (r?=??0.025 and p?=?0.936).     

光学印模法与普通印模法制作的全瓷嵌体边缘适合性比较

目的 研究采用光学印模法和普通印模法制作的全瓷嵌体与牙体组织间边缘适合性.方法 取1颗形态正常、无牙体缺损的下颌第二磨牙进行牙体预备,二次印模法取模翻制16个相同大小的超硬石膏模型代型,并将所有代型按随机数字表法随机分为光学印模组、普通印模组两组,两组分别用光学印模法和普通印模法取模,制作16个氧化锆全瓷嵌体,然后采用扫描电镜对其边缘间隙厚度进行测量,应用SPSS 19.0软件对实验数据进行统计分析,从而评价嵌体的边缘适合性.结果 光学印模组和普通印模组制作的嵌体水平间隙宽度分别为(46.25±5.04)μm和(77.52±11.71) μm,片切法电镜扫描结果显示,两种方法制作的嵌体边缘测试点均小于120 μm,边缘适合性比较均差异有统计学意义(t=6.938,P=0.000).结论 全瓷嵌体的边缘适合性光学印模组明显优于普通印模组,且两种方法制作的嵌体边缘适合性均在临床的可接受范围之内.     

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目的探讨IPS Empress 2可铸玻璃陶瓷嵌体修复后牙牙体缺损的临床疗效。方法对沈阳市和平区牙病防治所2010年6月至2012年6月接受治疗的后牙牙体缺损患者30例（48颗患牙）,采用IPS Empress 2可铸玻璃陶瓷嵌体修复,随访观察6个月至2年,参照改良的美国公共卫生服务（USPHS）评价标准对修复体的边缘适合性、外形、颜色匹配、继发龋发生以及磨损与折裂情况进行评价。结果 IPS Empress可铸玻璃陶瓷嵌体具有良好的边缘适应性及外形,色泽稳定,强度较高,未发现继发龋。结论 IPS Empress 2可铸玻璃陶瓷嵌体是一种修复后牙牙体缺损效果较好的修复体。     

不同粘接剂间隙对CAD/CAM嵌体边缘适应性的影响

目的 探讨不同粘接剂间隙对CAD/CAM嵌体氧化锆粘接强度的影响.方法 选取因正畸需要拔除的第一前磨牙30颗作为本研究对象,依照设置粘接剂间隙参数不同分为10μm(A组)、30μm(B组)、50μm(C组)制作嵌体;用轻体型硅橡胶复制边缘间隙,体视显微镜测量边缘间隙的厚度,使用SPSS13.0软件包对数据进行分析.结果 所有瓷嵌体均可顺利就位,测量数据均小于120μm,A组肩台间隙明显低于B组及C组(P<0.05),且B组轴面显著低于C组(P<0.05).结论 在粘接间隙设定为10~50μm时,CEREC制作瓷嵌体均可取得满意效果.     

嵌体修复体的微漏分析

目的:用热循环法对IPS-EmpressII热压铸瓷嵌体、Brilliant树脂嵌体与金合金嵌体边缘微漏的情况作比较。方法:实验中50个完整离体后磨牙浸泡在生理盐水中三周,每个牙被预备为邻洞型,20个无洞斜面,30个有洞斜面。样品被随机分为5组,第1组为瓷嵌体(IPS-EmpressII)用VariolinkII 粘结系统粘结,第2组为树脂嵌体(Coltene Brillant composites) 光/热聚合处理,用One Coat Bond , Duo Cement粘结。第3, 4, 5组为金合金嵌体(Argenco 50 typeIV),分别用松风羧酸水门汀粘固(HY-Bond Polycaboxylate)、松风玻璃离子水门汀粘固(HY-Bond Glasionomer CX)、登士柏(Poly-F)磷酸锌水门汀粘固。对样本作8℃-60℃300次冷热循环后,样品放在0.5%碱性品红中37℃水中恒温24小时,所有样品用金刚砂片沿嵌体长轴作对称性片切,切缘通过修复体近远中中心。在2 × 15倍立体显微镜下对染色深度作测定,统计学用方差分析法,作F 检验和q检验。结果:第1组与第3、4组 之间差异无显著性,第1、2组之间差异有显著性,第2、5组与第3、4组之间差异有显著性。结论:热循环处理IPS-EmpressII瓷嵌体的微漏值最小,树脂组的微漏值大于瓷嵌体组及金嵌体。金合金用松风玻璃离子和松风羧酸锌水门汀粘结微漏值比用登士柏Poly-F磷酸锌水门汀粘结微漏值小。     

Dissociation of the metal inlay from the polyethylene liner in an uncemented threaded cup

We describe a case of spontaneous dissociation of the metal inlay from the polyethylene cup of a sandwiched metal-on-metal total hip prosthesis manufactured from Co-28Cr-6Mo SM 21 alloy. The patient, a 51-year-old active woman, started to feel groin pain 50 months postoperatively. The pain progressed after a slight trauma and led to final revision after 66 months in situ. No signs of impingement were observed. The polyethylene cup showed an approximately 2 mm-deep groove in the superior wall, and the head was heavily worn on the lateral side. In addition to the typically observed abrasive wear patterns, several types of severe wear defects were noticed. Extensive metallosis and necrosis were observed histologically. This unusual case of substantial deformation of the head and the cup was presumed to have occurred as a result of the increased friction and consequent high wear of the metal head.