纯钛铸造支架可摘局部义齿的临床应用

目的 探讨太铸造支架可摘局部义齿的临床应用。方法 选择６２名缺牙患者,采用精 铸造技术,用ＤＥＮＴＡＵＲＵＭ Ｔｉ２２材料进行铸造支呆可摘局部义齿修复,制作修复体６８件,患者戴用后１～２年作临床观察。结果 钝钛铸造支架义齿质轻,基托薄,卡环具有弹性,固位好,戴用舒适,易适应。结论 临床上使用此种金属制作的义齿具有很好的修复效果,值得推广应用。     

纯钛铸造支架可摘局部义齿62例临床疗效观察

目的评估纯钛铸造支架可摘局部义齿的临床应用效果。方法患者62例纯钛铸造支架可摘局部义齿69件,检查初戴就位情况,使用3个月、3年后,统计义齿性口炎发生率及患者对修复效果的评价。结果纯钛铸造支架可摘局部义齿就位顺利,固位好,轻巧舒适,修复3个月后无义齿性口炎发生,修复后3年义齿性口炎发生率低,为2.9%（2/69）。患者比较满意。结论纯钛铸造支架可摘局部义齿有很好的临床修复效果。     

纯钛铸造支架可摘局部义齿在肯氏I类牙列缺损修复中的临床应用

目的：观察纯钛支架可摘局部义齿用于修复双侧牙列游离端缺损后的临床效果。方法：选择58例肯氏I类缺牙患者，用DENTAURUMTD2材料进行铸造支架可摘局部义齿修复，随访1-5年，对基牙状况、义齿使用情况等进行观察。结果：纯钛支架可摘局部义齿质量轻，异物感小，义齿配戴舒适，固位力持久，咀嚼功能恢复良好，无异味、无口腔黏膜过敏症状。结论：纯钛支架可摘局部义齿适用于肯氏I类缺牙的修复治疗，获得了良好的临床效果。     

纯钛铸造支架可摘局部义齿在肯氏Ⅰ类牙列缺损修复中的临床应用

目的:观察纯钛支架可摘局部义齿用于修复双侧牙列游离端缺损后的临床效果。方法:选择58例肯氏I类缺牙患者,用DENTAURUM Ti22材料进行铸造支架可摘局部义齿修复,随访1-5年,对基牙状况、义齿使用情况等进行观察。结果:纯钛支架可摘局部义齿质量轻,异物感小,义齿配戴舒适,固位力持久,咀嚼功能恢复良好,无异味、无口腔黏膜过敏症状。结论:纯钛支架可摘局部义齿适用于肯氏I类缺牙的修复治疗,获得了良好的临床效果。     

铸钛支架可摘局部义齿修复牙列缺损的临床观察

目的：观察上下颌多牙缺失后采用铸钛支架可摘局部义齿修复的临床效果。方法：90例牙列缺损病例,采用铸钛支架可摘局部义齿修复,随访1、3、5年。结果：2例游离端缺失,对颌天然牙伸长的余留天然牙病例,3年后余留牙松动脱落,修复体无法固位而失败,其余病例修复效果满意。结论：铸钛支架可摘局部义齿修复各类牙列缺损可取得较好的临床效果。     

钛在可摘局部义齿和全口义齿中的应用

3年来,笔者对我院牙列缺损及牙列缺失病例行钛支架可摘局部义齿或全口义齿修复35例,收到满意效果,现总结如下： 1材料与方法 自2003年6月至2006年8月,选择牙列缺损31例,牙列缺失4例行钛支架可摘局部义齿或全口义齿修复,其中男16例,女19例。     

纯钛铸造可摘义齿的临床应用

目的　评估整体铸造纯钛基托义齿的临床应用情况。方法　分别检测患者戴整体铸造纯钛基托义齿 2年后义齿性口炎发生率以及满意度 ,并和传统的整体铸造钴铬合金基托义齿相比较。结果　患者戴整体铸造纯钛基托义齿半年和 2年后均比铸造钴铬合金基托义齿的舒适性、语音功能、咀嚼功能好 (P <0 .0 5 ) ,而前者的义齿性口炎发生率却远低于后者 (P <0 .0 0 1)。结论　提示整体铸造纯钛基托义齿可能比传统的整体铸造钴铬合金基托义齿更适用于临床。     

可摘局部义齿修复肯氏Ⅲ类缺损的应力分析

目的：比较可摘局部义齿单侧、双侧设计修复肯氏Ⅲ类缺损时,基牙及黏膜应力分布的差异。方法：建立5个牙列缺损及可摘局部义齿的有限元模型,并按单、双侧设计分为A、B2组。在ANSYS有限元软件下,进行有限元力学计算和分析。数据通过SAS6．2统计软件包的配对t检验进行统计学分析。结果：最大应力均出现在第一前磨牙及第二磨牙的近中颈部。A、B2组比较,P〉0．05,基牙应力和黏膜应力均无显著性差异。结论：从基牙应力角度分析,可摘局部义齿修复肯氏Ⅲ类缺损,单侧设计没有对基牙产生过大的负荷。     

可摘局部义齿修复肯氏III类缺损的应力分析

目的:比较可摘局部义齿单侧、双侧设计修复肯氏III类缺损时,基牙及黏膜应力分布的差异。方法:建立5个牙列缺损及可摘局部义齿的有限元模型,并按单、双侧设计分为A、B2组。在ANSYS有限元软件下,进行有限元力学计算和分析。数据通过SAS6.2统计软件包的配对t检验进行统计学分析。结果:最大应力均出现在第一前磨牙及第二磨牙的近中颈部。A、B2组比较,P>0.05,基牙应力和黏膜应力均无显著性差异。结论:从基牙应力角度分析,可摘局部义齿修复肯氏III类缺损,单侧设计没有对基牙产生过大的负荷。     

上颌可摘局部义齿修复对辅音声学特征的影响

目的:探讨上颌肯氏I类牙列缺损可摘局部义齿修复对辅音声学特征的影响。方法:应用计算机语音分析系统,分析12例患者义齿初戴前、初戴时、初戴后1、2、4、8周,不同时间辅音/s/、/sh/、/j/强频区及第1强频区带宽,/t/的音轨点。结果:/s/第1、第2强频区及第1强频区带宽在义齿初戴时与初戴前、初戴1周时相比,有统计学差异(P<0.05)。其余辅音各组数据无统计学差异(P>0.05)。结论:可摘局部义齿前腭板的前部是影响发音的主要部位。从声学角度看,上齿龈、腭中缝区不宜安放大连接体,硬腭后部安放大连接体比较合适。     

纯钛支架义齿与钴铬合金支架义齿修复效果的比较

目的评估纯钛铸造支架义齿的临床应用效果。方法为168例肯氏Ⅰ、Ⅱ类牙列缺损的患者制作71例纯钛支架义齿和97例钴铬合金支架义齿,通过比较两组患者临床试戴情况、初戴义齿适应期的调改情况、义齿性口炎的发生情况以及满意度,评估纯钛铸造支架义齿的临床修复效果。结果纯钛支架义齿比钴铬合金支架义齿就位顺利、调改少、患者满意度高,并且义齿性口炎的发生率低。结论纯钛铸造支架义齿与传统的钴铬合金铸造支架义齿相比临床修复效果好。     

纯钛义齿支架表面抛光的临床研究

目的：探索纯钛义齿支架的表面抛光方法，确保义齿有良好稳定的抛光效果，且不影响义齿支架的精度。方法：为78例患者制作105件纯钛可摘义齿，分三组，每组35件，分别为未酸洗，酸洗，酸洗并组织面适量均匀打磨抛光，分别测定义齿戴入时的抛光亮度与义齿与口腔组织的贴合程度和半年后义齿的抛光度。结果：三组之间的义齿与组织的贴合度无显著性差异（P＞0．05），第二，三组义齿的表面抛光度明显好于未酸洗组即第一组（P＜0．001），组织面抛光的亮度第三组明显好于未抛光第二组（P＜0．001），结论：酸洗和组织面的均匀适量打磨抛光可提高纯钛可摘义齿的表面亮度而不影响其精度。     

可摘局部义齿修复1126例临床分析

目的：对1126例可摘局部义齿进行分析，为临床关于可摘局部义齿修复牙列缺损积累经验。方法：随机选取1126件义齿修复病例，分析牙齿缺损位置、数量与性别和年龄的关系及修复体的类型，并对采用新技术进行的特殊设计进行分析。结果：上颌牙缺失多于下颌，不同年龄组缺牙好发部位不同，青年组以前牙缺失为多，其他年龄组以后牙缺失为多。男女两组中平均失牙数随年龄增加而增加，但与性别无关，在各类可摘局部义齿设计中，第5类最多。结论：可摘局部义齿制作简便，适应症广，目前仍然在修复治疗中发挥着重要的作用。     

Periodontal findings in patients 10 years after insertion of removable partial dentures

The purpose of this retrospective study was to evaluate the changes in the periodontal conditions of patients wearing different designs of removable partial dentures over long-term. Seventy-four patients treated with 101 mainly conical crown-retained dentures (CCRDs) or clasp-retained removable partial dentures (RPDs) or a combination of conical crown and clasp-retained dentures (CRPDs) were re-examined 10 years after insertion. Periodontal findings were compared with baseline values at insertion. A deterioration of the probing depths (PDs) and tooth mobility was found. The abutment teeth of the RPDs suffered more severe deterioration than the abutment teeth of the CCRDs and the CRPDs. The absence of a regular recall system for the patients may be responsible for this outcome.     

钴-铬合金铸造可摘局部义齿折断临床分析

目的：分析临床Co-Cr合金铸造可摘局部义齿(RPD)折断原因，以提高义齿质量。方法：对289件Co-Cr合金铸造RPD进行回顾总结，并对其发生铸造缺陷、折断进行统计分析。结果：本文289件铸件中，肉眼检查有铸造缺陷者93件，占31．3％，其余196件行X线探测检查有缺陷者36件，占18．6％。义齿各部位出现铸造缺陷机率：卡环小连接体处较高，下颌高于上颌。戴牙2年后折断32件，其中原铸造有缺陷者28件，占87．5％。结论：①铸造缺陷是造成铸造RPD折断的主要原因。②应用X线探测仪进行铸造义齿检测，是提高修复质量的有效方法。     

The effect of three different periodontal pre-treatment procedures on the success of telescopic removable partial dentures

In this prospective study, 120 teeth consisting of maxillary and mandibular canines and premolars were divided into three groups each containing 40 teeth. The teeth were assigned randomly in quadrants to three different periodontal treatment protocols. The first group was treated with professional prophylaxis only. The second group received additional deep scaling. With the third group, additional surgical periodontal flap surgery and scaling was performed. Both papillary bleeding index (PBI) and probing depth (PD) were evaluated before, during and after treatment. During the subsequent prosthetic treatment phase all teeth were then used as telescope abutments supporting a removable prosthesis. The documentation of the attachment level (AL) was then used as a clinical parameter. One year after the incorporation of telescopic removable partial dentures (RPDs), PD, PBI and AL were again evaluated. The resulting periodontal parameters were compared between the different groups using the general linear model (GLM) repeated measures and the Kruskal-Wallis test for non-parametric variables. Differences within the three treatment groups were determined using the t-test, e.g. the Wilcoxon test for dependent variables (P < 0.05). A significant decrease in inflammatory indices (PBI) was found for all types of periodontal treatment (P < 0.03 for all groups). Additionally, the reduction in PD was significant for all of the three groups (P < 0.001 for all groups). The greatest reduction in PD was observed in the group in which a surgical approach was used. Evaluation of the attachment level after the incorporation of the telescopic RPDs showed that tooth position did not influence the periodontal prognosis and that the use of telescopic RPDs exerted no ascertainable negative influence on the periodontium of the abutment teeth.     

Preclinical removable partial dentures curriculum survey

PURPOSE: In 2001, a survey of U.S. dental schools was conducted to determine the curricular structure, teaching philosophies, and techniques used in preclinical removable partial denture (RPD) courses and to also establish what newer educational techniques and materials are currently being used by U.S. dental schools. MATERIALS AND METHODS: The questionnaire was mailed to the chairpersons of the prosthodontic/restorative departments of 54 U.S. dental schools. Of these, 43 schools returned the completed survey, resulting in a response rate of 80%. The mean, median, and range of responses were computed where applicable. RESULTS: Results from this survey show that the mean student-to-faculty ratio in the preclinical RPD course was 12:1, with a median of 10:1 and a range of 6:1 to 27:1. The mean number of laboratory hours was 55, with a median of 50 and a range of 13.5 to 120. The mean number of lecture hours reported was 21, with a median of 20.5 and a range 10 to 60. The mean number of practical examinations was 2, with a median of 3 and a range of 0 to 8. The mean number of written examinations given was 2, with a median of 2 and a range of 1 to 6. Ninety-five percent of the schools have prosthodontists teaching this course. The mean number of months that this course is taught is 4.4 months, with a median of 4 and a range of 1.5 to 10. Fifty-five percent of the schools used the Hanau semiadjustable articulator. One hundred percent of the schools teach students to use a surveyor when designing an RPD, and 84% percent of the schools teach the Krol or the Kratochvil RPI design or a combination of the 2 designs. CONCLUSIONS: Preclinical RPD educational programs vary from school to school, yet a large percentage of schools agree on certain topics. Only 19% of dental schools are incorporating new technologies, such as the use of the internet, in their preclinical RPD curriculum.