瓷肩台在烤瓷修复中的临床应用效果分析

普通镍铬金属烤瓷存在着龈缘染色的问题,尤其影响前牙美观,我们对2003-2006年876例患者1363个单位的镍铬合金烤瓷修复体进行了加瓷肩台与不加瓷肩台的分析、比较。1资料与方法1.1一般资料2003-2006年来我科就诊的876例患者,其中男524例,女352例。年龄18-72岁,前牙842颗,后牙521     

铸造核桩加金属烤瓷全冠应用于前牙修复的临床观察

目的探讨利用铸造核桩加金属烤瓷全冠来修复前牙残冠、残根的优点。方法选择残冠、残根牙齿145棵，利用自凝塑料棒制作桩部及核部代型，最后整体铸造。粘固铸造好的核桩，取印模，制作金属烤瓷全冠。结果成功137棵，失败8棵，成功率达94．5％。结论利用铸造核桩加金属烤瓷全冠来修复前牙残冠、残根，能够取得较好的修复效果，临床上值得进一步推广。     

金属烤瓷修复前牙形态的方法介绍

金属烤瓷桥以其美观、坚固、生物相容性好等特点在修复前牙缺损中发挥着重要作用。怎样才能制造出外观生动、自然、功能完善的前牙金属烤瓷修复体 ,一直是口腔修复探求的问题。本文就如何获得金属烤瓷桥前牙良好的形态做一介绍 :　　材料　德国生产ｖｉｔａ瓷粉 ,Ｈｅｒａｅｕｓ烤瓷钢。　　烤瓷桥制作　 (1)金属基底蜡形的制作 :重点强调连结体的蜡型制作。在不影响咬合力的情况下 ,连结体因应尽量位于舌侧 ,唇侧面应向舌侧切入 ,以形成间隙连结体的上下部应留出圆形间隙 ,这样在瓷修复后可以防止暴露金属 ,同时也能显示出牙的立体感。 (2 …     

金属烤瓷修复体在前牙美容修复中的应用

目的　探讨金属烤瓷修复体在前牙美容修复中的临床应用范畴 ,及在某些特殊情况下如何达到最佳修复效果。方法　确定适应证、比色、预备基牙、取模、戴牙。结果　 30 9例金属烤瓷修复的前牙 ,经 3月～ 4年观察 ,1例因牙根纵折失败 ,其余疗效满意。结论　金属烤瓷修复体在满足适应证的情况下 ,在前牙美容修复中应用广泛 ,疗效满意。     

两种非贵金属烤瓷冠的临床应用效果比较与分析

目的：比较钴铬合金纳米烤瓷冠与镍铬合金烤瓷冠的临床应用效果。方法：对80例前牙金属烤瓷冠修复患者,分别制作钴铬合金纳米烤瓷冠与镍铬合金烤瓷冠各40件,并对多项临床指标进行为期2～4年的追踪观察。结果：两种烤瓷冠的边缘密合性相似（P〉0.05）,与镍铬合金烤瓷冠比较,钴铬合金纳米烤瓷冠组的颜色匹配性、长期完整性、颈缘返青和龈缘炎的发生率均较低（P〈0.01）。结论：钴铬合金纳米烤瓷冠具有较良好的生物相容性,其临床表现优于镍铬合金烤瓷冠。     

高金合金烤瓷修复体的临床疗效观察

非贵金属（主要是镍铬合金）烤瓷修复体在我国应用广泛．是目前临床最常用的修复方法之一，占冠桥修复的60％以上．但其存在的氧化层渗透，颈缘染色和引起过敏等问题仍未解决．在发达国家已较少使用。而贵金属，尤其是高金合金，由于其耐腐性、抗氧化性优，铸造精度高的生物相容性良好，是做烤瓷修复体的理想材料，在欧美国家应用很广。由于高金属合金烤瓷修复体价格高，目前我国只有经济较好的城市开展的较多．随着我国经济的发展，     

核桩烤瓷冠在前牙修复中的应用体会

近年来，由于烤瓷修复技术水平的提高，已被广泛应用于临床，尤其是前牙的缺失、残冠、残根及牙科美容等。我们本着保存牙体与美容治疗的原则，从1997年3月至今，对46例前牙残冠、残根患进行了核桩烤瓷修复。就核桩烤瓷修复中易出现的龄缘密合性问题谈谈笔的体会。     

不同种类贵金属合金与镍铬合金的金瓷结合强度分析

目的：比较3种贵金属合金和镍铬合金与瓷的金瓷结合强度。方法：通过金瓷界面间的剪切强度测定，观察金铂合金、金钯合金、银钯合金及镍铬合金的金瓷结合强度。结果：不同种类的贵金属合金及镍铬合金间的金瓷结合强度测量值均有差异，镍铬合金的结合强度值最高，金铂次之，银钯再次之，金钯最小。除金—铂合金组与银—钯合金组之间无显著性差异外，其他各组之间都有显著性差异。结论：在本实验条件下贵金属合金结合强度低于镍铬合金，其中金钯合金最低。     

金属烤瓷冠修复体对牙龈健康的影响分析

目的：探讨如何减少金属烤瓷冠修复体对牙龈组织的炎症及牙龈缘着色的影响。方法随机选取口腔门诊做金属烤瓷冠修复体3年的患者80例,270颗修复体,对修复后牙龈炎症、牙龈缘着色的情况进行分析。结果17颗修复体出现牙龈炎症,占6．2％,20颗修复体出现牙龈缘着色,占7．4％。结论合理的设计、规范的牙体预备及基底冠金属材质的选择,能减少牙龈炎症和牙龈缘着色的发生。     

3种基底烤瓷冠临床应用效果的比较

目的：比较和探讨镍铬合金、含钛的镍铬合金、高金合金烤瓷冠的临床应用效果。方法：分别制作3种不同基底烤瓷冠各50个,让患者佩戴,观察3者带入时和带入3年后烤瓷冠的颜色、边缘密合度、颈缘染色及冠的折裂、折断的情况。结果：镍铬合金与含钛的镍铬合金烤瓷冠在颜色、边缘密合度、颈缘染色方面差异无统计学意义（P〉0.05）,高金合金烤瓷冠无颈缘染色,在颜色和边缘密合度方面优于另外两者（P〈0.05）。3者在折裂崩瓷方面差异无统计学意义（P〉0.05）。结论：高金合金烤瓷冠比另外两者有更好的临床效果。     

Hardness of composite materials used for restoration of front teeth]

The evaluation comprised four anterior two-components composite materials: concise-"B", concise-"T", adaptic and silar and six anterior one-component composite materials: heliosit, visio-dispers, visio-fill, durafill, estilux and prisma-fill. The Amsler press of 600-2000 kg was used for evaluation of hardness on pressure, flexion and extension of 10 composite materials using the original "accessory apparatus" PAC-s and PAC-e. For evaluation of hardness 15 samples of each material were made. On the basis of the results obtained it has been concluded that no evenly regular dependence exists among the evaluated hardness of different composite materials so it is necessary to evaluate all three hardness for their adequate categorization. Taking into account levels of all three hardness, AJKM was recommended as better material than ADKM, while some of them are much better (such as estilux, prisma-fill and visio-fill) for restoration of angular defects of teeth structures of crowns of anterior teeth.     

全瓷高嵌体修复后牙缺损的临床疗效观察

目的探讨全瓷高嵌体修复后牙的临床方法及其疗效。方法选择2009年3月-2010年7月于成都军区机关医院口腔修复科就诊行全瓷高嵌体修复的患者31例、37颗患牙,在患者戴用修复体6个月后评价其形态、颜色、边缘适应性、继发龋、折裂松动脱落及患者满意度等。结果1件修复体出现瓷体折裂,1件修复体出现边缘着色,修复合格率为94．6％。结论全瓷高嵌体修复牙体缺损的后牙临床疗效良好。     

前牙铸瓷修复47例

铸瓷是口腔临床美学修复常用的一种方式,随着材料发展和技术进步,铸瓷修复前牙从其绝佳的光学特性,极好的生物相容性,优良的耐磨损性,逼真的色彩所达到的美观效果,都要优于传统的金属烤瓷,因而被年轻时尚人士广泛接受.2006年7月～2009年2月我科采用此技术修复患者47例,并获得较为理想的修复效果.     

Arthroscopic meniscal repair: a comparative study between three different surgical techniques

The purpose of this prospective study was to evaluate and compare the results of arthroscopic meniscal repair using three different techniques. Between January 2002 and March 2004, 57 patients who met the inclusion criteria underwent an arthroscopic meniscal repair. The outside-in technique was used in 17 patients (group A), the inside-out in 20 patients (group B), while the rest of the 20 patients (group C) were managed by the all-inside technique using the Mitek RapidLoc soft tissue anchor (Mitek Surgical Products, Westwood, MA, USA). Anterior cruciate ligament (ACL) reconstruction was performed in 29 patients (51%). The criteria for clinical success included absence of joint line tenderness, locking, swelling, and a negative McMurray test. The minimum follow-up was one year for all groups. The mean follow-up was 23 months for group A, 22 months for group B, and 22 months for group C. All meniscal repairs were considered healed according to our criteria in group A, while 19 out of 20 repairs (95%) healed in group B. Finally 7 of 20 repairs (35%) were considered failures in group C and this difference was statistically significant in comparison with other groups. The time required for meniscal repair averaged 38.5 min for group A, 18.1 min for group B, and 13.6 min for group C. Operation time for meniscal repair in group A was statistically longer in comparison with other groups. There were no significant differences among the three groups concerning complications. According to our results, arhtroscopic meniscal repair with the inside-out technique seems to be superior in comparison with the other methods because it offers a high rate of meniscus healing without prolonged operation time.Presented at the 11th ESSKA 2000 Congress, Athens, Greece, 2004     

Fixation strength of three different graft types used in posterior cruciate ligament reconstruction

Surgical reconstruction is generally recommended for PCL and associated ligament injuries. A variety of graft choices exist for PCL reconstruction surgery. This study evaluated the initial fixation strength of three grafts using in PCL reconstruction in a porcine model. Twenty fresh porcine knees were harvested and randomly assigned to four groups: bone–patellar tendon–bone graft, quadruple tendons graft, Achilles tendon graft, and normal PCL. After reconstruction the knee was tested on an MTS testing machine by translating the tibia posteriorly until failure at 30° of flexion, neutral rotation, and anatomical vertical alignment. Biomechanical parameters including maximal failure load, stiffness, and failure modes, were analyzed and compared. In the maximal failure load, the four-strand tendon group was significantly greater than the other two grafts. However, it had greatest translation. There were no significant differences between the three grafts in stiffness. All three of these commonly used grafts had weaker initial fixation strength and stiffness than normal PCL. Graft failure occurred mainly at the tendon-bone junction and tendon-suture sites. The Patellar tendon group had significantly least translation during continuing loading.     

Simulation-based comparison of two approaches frequently used for dynamic contrast-enhanced MRI

Purpose  

The purpose was to compare two approaches for the acquisition and analysis of dynamic-contrast-enhanced MRI data with respect to differences in the modelling of the arterial input-function (AIF), the dependency of the model parameters on physiological parameters and their numerical stability. Eight hundred tissue concentration curves were simulated for different combinations of perfusion, permeability, interstitial volume and plasma volume based on two measured AIFs and analysed according to the two commonly used approaches. The transfer constants (Approach 1) K ^trans and (Approach 2) k _ep were correlated with all tissue parameters. K ^trans showed a stronger dependency on perfusion, and k _ep on permeability. The volume parameters (Approach 1) v _e and (Approach 2) A were mainly influenced by the interstitial and plasma volume. Both approaches allow only rough characterisation of tissue microcirculation and microvasculature. Approach 2 seems to be somewhat more robust than 1, mainly due to the different methods of CA administration.     

Long-term results of arthroscopic Bankart repair with a bioabsorbable tack

BACKGROUND: Short-term to midterm data are available on arthroscopic shoulder stabilization using bioabsorbable tacks or suture anchors. It remains unknown whether these techniques can equal the success of open Bankart repair in the long term. PURPOSE: To assess the long-term outcome of arthroscopic Bankart repair using bioabsorbable tacks in patients with traumatic anterior shoulder instability with a minimum follow-up of 7 years. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Treatment outcomes were determined prospectively according to the Rowe score and retrospectively according to the Constant and American Shoulder and Elbow Surgeons scores. Included in this study were 18 consecutive patients with a mean age of 26.8 years (range, 16-62 years) who underwent arthroscopic Bankart repair using bioabsorbable tacks for traumatic anterior shoulder instability. The study group consisted of 14 male and 4 female patients. The mean follow-up was 8.7 years (range, 7.0-9.8 years). RESULTS: One patient had recurrent dislocations requiring further surgery, for an overall failure rate of 5.6%. An additional patient had 1 traumatic subluxation episode within the first postoperative year that did not recur. According to the Rowe score, which increased to 90.3 (17.8) from 32.8 (8.3) points preoperatively, 15 patients (83.3%) achieved a good or excellent result. The mean Constant score was 91.3 (SD, 6.9) points, and the mean American Shoulder and Elbow Surgeons score was 92.1 (SD, 6.9) points postoperatively. A return to the preinjury level of sports competition was reported by 64% of patients. No signs of synovitis occurred in any patient postoperatively. CONCLUSION: Arthroscopic Bankart repair for the treatment of recurrent traumatic anterior shoulder instability repair using bioabsorbable tacks offers reliable results with respect to failure rate, range of motion, and shoulder function during a minimum follow-up of 7.0 years. In contrast to previous reports on arthroscopic Bankart repair, results did not deteriorate during follow-up.     

Nasal teeth: report of three cases

The ectopic eruption of the teeth into the nasal cavity is a rare phenomenon. We report cases: two involving the nasal cavity and one involving the hard palate and complicated by Aspergillus rhinitis. We describe the clinical and radiologic presentation of these cases and discuss their etiology, complications, diagnosis, and treatment.     

前牙慢性根尖周炎有瘘型一次性根管治疗疗效观察

目的:探讨前牙慢性根尖周炎有瘘型一次性根管治疗临床疗效.方法:慢性根尖周炎有瘘型前牙115例(患牙131颗),随机分为A、B两组.A组为一次性根管治疗术治疗组(63例72颗患牙),B组为传统多次性根管治疗术对照组(52例59颗患牙),分别于术后2年复查,进行临床疗效对照观察,所获资料作统计学处理.结果:A组远期治愈率93.06%(67/72颗牙).B组远期治愈率94.92%(56/59颗牙)(P＞0.05).结论:一次性根管治疗术治疗前牙慢性根尖周炎有痿型远期疗效与传统多次性根管治疗术元显著性差异,且省时、省钱,故优于传统多次根管治疗法.