可摘局部义齿卡环对基牙的影响

目的 研究可摘局部义齿卡环对基牙牙体牙周及义齿的修复效果的影响。方法 采用社会调查和门诊连续随访的形式,对被卡环损伤了的３９７颗基牙（１４６名患者的１７９件义齿）进行了调查分析。结果 基牙损伤与年龄、义齿使用时间、义齿类型及义齿质量有关。结论 戴牙时间越长,基牙发生损伤越重。主要原因是基牙与卡环的摩擦过多或卡环位置不当。     

老年人可摘局部义齿修复后对基牙牙周状况的影响

目的：研究老年人戴用可摘局部义齿对基牙牙周健康状况的影响。方法：对56例牙列缺失后的老年人行可摘局部义齿修复,3个月、12个月后复查并记录基牙与对侧同名牙的菌斑指数、牙龈指数、探诊出血指数、探诊深度等四项牙周指标。结果：患者戴用可摘局部义齿后基牙的四项牙周指标明显高于对照牙（P〈0．01）;老年患者戴用可摘局部义齿后的3个月内,基牙的牙周指数均明显升高（P〈0．01）,12个月时基牙的牙周状况趋于稳定状态。结论：老年人戴用可摘局部义齿可引起基牙的牙周指数增加。     

可摘局部义齿的基牙健康状况研究

可摘局部义齿的基牙健康状况研究余占海霍绥梅刘斌为了解可摘局部义齿（Ｒｅｍｏｖａｂｌｅｐａｒｔｉａｌｄｅｎｔｕｒｅｓ，简称ＲＰＤｓ）对基牙健康状况的影响，自１９９０年起，先后选择１２８例牙列缺损患者进行了ＲＰＤｓ修复，并定期对他们进行了为期１年的临床...     

用桩冠作基牙的可摘局部义齿修复

临床上常见一些患者全牙列缺损，但以上、下尖牙多见残留部分较完整的牙根，因而要求进行义齿修复。临床上亦有拔除残根后进行全口或半口义齿修复、根管治疗后覆盖义齿修复、附着体修复等。作者自1996年开始采用保留适合做桩冠、且能承担可摘局部义齿固位力的残根，先完成桩冠修复，再用该桩冠做基牙，进行可摘局部义齿修复，取得了良好效果。现介绍如下：1.选择适宜作可摘局部义齿基牙的残根，牙根需有足够的长度及粗细合适的根管，尖周情况良好，牙龈、牙周无炎症。行完善的根管治疗后进行桩冠修复，要求桩冠钉长度达根长2/3，直径达1/2根…     

老年人铸造局部可摘义齿基牙龋病情况调查

戴用可摘局部义齿后无疑会破坏口腔内环境,导致基牙及邻牙发生龋损。本文调查了86例戴用铸造局部可摘义齿病人的基牙龋损情况,以探讨义齿戴用时间、口腔卫生情况等对基牙龋损的影响。1临床资料和方法1.1临床资料2000年1月以来在本科接受RPDs修复治疗,持续使用义齿并来我科复诊的病人,共86人,年龄60~92岁,其中男45例,女31例,义齿共108件,基牙数为312个。修复前对病人口腔内余留的龋齿进行治疗。初戴义齿时给病人讲清义齿使用和保护的注意事项,在观察期不作专业性的口腔卫生指导和特殊的预防。所有义齿均为钴铬合金铸造而成,义齿设计尽量小…     

可摘局部义齿基牙龋坏的初步分析

本文对87人,96件可摘义齿基牙龋坏的114颗牙进行了临床初步分析。结果显示戴牙时间越长基牙龋坏越重,主要原因是卡环对基牙的磨擦,卡环位置不当,人工牙与基牙之间的接触关系不良。为减少基牙的龋坏,本文提出了一些设计制作可摘义齿中值得注意的问题及预防基牙龋坏的措施。     

可摘局部义齿基牙健康状况的远期临床观察

为了深入探讨可摘局部义齿（ＲｅｍｏｖａｂｌｅＰａｒｔｉａｌＤｅｎｔｕｒｅｓ,ＲＰＤｓ）对口腔微生态系进而对基牙健康状况的影响,以及影响特点和相关因素［１］,我们先后对１２８例牙列缺损患者进行了ＲＰＤｓ修复,并对患者进行了为期４年的临床追踪观察。现将...     

可摘局部义齿修复对基牙影响的临床评价

目的回顾性研究可摘局部义齿修复对基牙影响.方法戴卡环固位的可摘局部义齿5～8年的患者63例,修复体87件.记录并比较戴义齿5年后的基牙和非基牙患龋率和牙缺失率.结果基牙的患龋率(14.59%)和牙缺失率(20.17%)高于非基牙(8.27%,7.87%),Kennedy分类的第四类牙缺失患者的患龋率和牙缺失率低于其他牙列缺损患者,但差异无显著性(P＜0.05).结论卡环固位义齿修复在一定程度上可增加基牙患龋率和牙缺失率.     

可摘局部义齿基牙牙周指数和牙菌斑细菌相对分布

临床研究已经证实[1～3] ,戴用可摘局部义齿 (Ｒｅ ｍｏｖａｂｌｅＰａｒｔｉａｌＤｅｎｔｕｒｅｓ ,ＲＰＤｓ)会破坏口腔微生态平衡 ,进而对基牙牙体、牙周组织健康造成不良影响。为了进一步探讨ＲＰＤｓ对口腔微生态系影响的微观变化及特点 ,作者先后为 2 8例第一磨牙缺失的患者进行ＲＰＤｓ修复 ,并就基牙牙周指数及菌斑细菌相对分布变化进行了为期 4年的动态检测分析。现报道如下 :1　资料和方法1.1　病例选择本组 2 8例患者 ,男 17例 ,女 11例 ,年龄 2 3～ 5 4岁 ,均为第一磨牙缺失 (任何一区 )。从未戴过义齿 ,基牙无龋或充填物 ,牙龈…     

老年人可摘局部义齿基牙的临床调查

可摘局部义齿修复效果与基牙有直接密切关系。通过临床调查560例次可摘局部义齿确定出基牙的排列顺序及统计出双尖牙、尖牙为老年人常用基牙。由于双尖牙具有有利的解剖形态及解剖位置,所以常首选作为义齿的基牙,实际对尖牙起到了保护作用,是尖牙在口腔中保持较长时间的原因之一。对双尖牙的组织保健、形态完整的维持与修复是很重要的。     

可摘局部义龄基牙健康状况的研究

目的 对比患者不同的口腔卫生习惯,不同的义齿设计,不同的义齿材料等,以分析可摘局部义齿（removable partial dentures,RPDs)对口腔微生态的影响。方法 在患者戴入RPDs3年后,用龋病,牙周病常用指数及口腔卫生指数来检查基牙健康状况,用X^2检验分析它们之间的结果有无差异。结果 患者的口腔卫生习惯,义齿的不同设计均与基牙健康密切相关,而两种不同材料的义齿对基牙的损坏无显著性差异。结论 RPDs基牙的健康与多因素有关,而口腔卫生状况是决定RPDs口腔微生态的重要因素。     

上海市静安区老年人可摘局部义齿戴用及基牙健康状况的初步调查

目的 初步调查上海市静安区老年患者可摘局部义齿的戴用和基牙健康状况,有针对性地为老年患者提供基牙健康维护建议,提高基牙(余留牙)的存留率。方法 参照第四次全国口腔健康流行病学调查方法,对静安区340名60岁及以上老年人进行口腔检查和问卷调查,采用SPSS 21.0软件包进行数据分析。结果 可摘局部义齿肯氏Ⅲ类基牙的龋均明显低于肯氏Ⅰ类、Ⅱ类和Ⅳ类(P<0.05)。有饭后漱口和清洗义齿习惯的老年患者,其基牙患龋率、软垢指数和牙周探诊深度显著低于没有饭后清洁习惯的老年患者。有夜间佩戴义齿习惯的老年患者,基牙牙周方面的损害较夜间取下义齿的老年患者明显,差异有统计学意义(P<0.05)。可摘局部义齿戴用时间超过3年以上更易影响基牙健康(P<0.05)。结论 在社区口腔健康教育工作中,应指导老年患者掌握正确的可摘局部义齿使用方法和口腔清洁方式,养成定期复查习惯,提高基牙(余留牙)的留存率。     

多乐氟预防可摘局部义齿基牙患龋的临床研究

目的 观察多乐氟对可摘局部义齿基牙的防龋效果. 方法 行可摘局部义齿修复的牙列缺损患者100例,采用自身对照的方法,患者修复义齿后,随机选择一侧基牙作为试验侧基牙组涂布多乐氟,半年重复1次,对照侧基牙组做空白对照,3年后复诊检查可摘局部义齿基牙的龋坏情况. 结果 试验侧基牙组患龋率为24. 7%(40/162),低于对照侧基牙组41. 9%(67/160),差异具有统计学意义(χ2 =10. 71,P<0. 01). 结论 可摘局部义齿基牙涂布多乐氟可有效预防龋病的发生.     

Longitudinal clinical evaluation of undercut areas and rest seats of abutment teeth in removable partial denture treatment

Purpose: Adequate preparation of abutment teeth for removable partial denture (RPD) rest seats allows appropriate masticatory force transmission, retention, and stability of supporting structures. It follows that careful preparation will be important for the longevity of the rehabilitation. The present study aimed to clinically evaluate rest seats and undercut areas of abutment teeth in RPD wearers after 2 years of use. Materials and Methods: A total of 193 occlusal, incisal, and cingulum rest seats were evaluated in terms of shape, rest adaptation, wear, caries, fractures, and surface type (enamel, composite resin, or amalgam). Two hundred and fourteen undercut areas were evaluated in terms of surface type (enamel or restoration) and integrity. This study was approved by the Research Ethics Committee of the Federal University of Rio Grande do Norte, resolution 196/1996, protocol number 11/05. Results: Intact preparations accounted for 92.2% of the total. Application of the Pearson test (p= 0.289) found no statistically significant differences among the materials on which the rest seats were prepared. For the undercut areas, 20.7% of those obtained on restorative material were nonintact. In addition, Fisher's exact test showed a statistically significant difference (p= 0.001) in surface type; enamel surfaces were shown to be 14 times more stable than restored surfaces. Conclusions: The results of this study suggest that rest seats are stable, regardless of the material on which they are prepared. Retentive areas were shown to be more stable when they were located in enamel.     

Microbiological risk for periodontitis of abutment teeth in patients with removable partial dentures

Summary  Tannerella forsythia , Porphyromonas gingivalis and Treponema denticola are identified as the red complex which exists in high proportions in periodontally diseased patients. The aim of this study was to assess the microbiological risk for periodontitis of abutment teeth in subjects wearing removable partial dentures (RPDs) by measuring the red complex using BANA-ZymeTM test. Thirty-eight subjects (mean age: 62·2 years) with Kennedy Class II partially edentulous arch participated in this study. The red complex and clinical parameters, such as plaque index, gingival index, probing depth and tooth mobility were recorded at abutment teeth in contact with the direct retainer of unilaterally designed RPDs and the corresponding non-abutment teeth on the opposite side. Mean scores for the red complex, plaque index, gingival index and tooth mobility of the abutment teeth were significantly greater than those of the non-abutment teeth ( P  < 0·01). No significant mean difference in pocket depth was found between the abutment and non-abutment teeth. Logistic regression analysis revealed that abutment teeth, high scores of plaque index and a maintenance interval longer than 6 months were significant predictors for positive red complex scores ( P  < 0·05). These results suggest that the microbiological risk for periodontitis of abutment teeth is greater than that for non-abutment teeth in RPD wearers.     

Multifactorial risk assessment for survival of abutments of removable partial dentures based on practice-based longitudinal study

Objectives

Predicting the tooth survival is such a great challenge for evidence-based dentistry. To prevent further tooth loss of partially edentulous patients, estimation of individualized risk and benefit for each residual tooth is important to the clinical decision-making. While there are several reports indicating a risk of losing the abutment teeth of RPDs, there are no existing reports exploring the cause of abutment loss by multifactorial analysis. The aim of this practice-based longitudinal study was to determine the prognostic factors affecting the survival period of RPD abutments using a multifactorial risk assessment.

Methods

One hundred and forty-seven patients had been previously provided with a total of 236 new RPDs at the Osaka University Dental Hospital; the 856 abutments for these RPDs were analyzed. Survival of abutment teeth was estimated using the Kaplan–Meier method. Multivariate analysis was conducted by Cox's proportional hazard modelling.

Results

The 5-year survival rates were 86.6% for direct abutments and 93.1% for indirect abutments, compared with 95.8% survival in non-abutment teeth. The multivariate analysis showed that abutment survival was significantly associated with crown-root ratio (hazard ratio (HR): 3.13), root canal treatment (HR: 2.93), pocket depth (HR: 2.51), type of abutments (HR: 2.19) and occlusal support (HR: 1.90).

Conclusion

From this practice-based longitudinal study, we concluded that RPD abutment teeth are more likely to be lost than other residual teeth. From the multifactorial risk factor assessment, several prognostic factors, such as occlusal support, crown-root ratio, root canal treatment, and pocket depth were suggested.

Clinical significance

These results could be used to estimate the individualized risk for the residual teeth, to predict the prognosis of RPD abutments and to facilitate an evidence-based clinical decision making.     

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目的探讨可摘局部义齿的不同设计与基牙致龋的关系。方法选择2005年6月至2007年12月南阳市口腔医院修复科收治的需进行可摘局部义齿修复的患者156例,根据患者牙列缺损的情况,按照Kennedy分类法设计混合支持式义齿和黏膜支持式义齿2种不同形式的修复体,在患者戴入义齿前及戴入义齿后3年、5年分别对基牙牙体组织进行龋病检查及卫生状况检查。结果不同设计形式的修复体与基牙健康密切相关,同种支持形式的4类牙列缺损修复设计之间虽有差别,但差异无统计学意义(P>0.05);而黏膜支持式义齿引起基牙患龋率明显高于混合支持式义齿,差异有统计学意义(P<0.05)。可摘局部义齿修复患者,口腔卫生状况差者的患龋率明显高于口腔卫生状况优良者,差异有统计学意义(P<0.05)。结论可摘局部义齿的设计与制作不合理,患者戴于口内,如果口腔卫生又差,则会造成基牙和相邻牙龋坏,不仅影响口腔甚至影响全身健康。     

垂直型快套附着体义齿的初步应用

目的：介绍垂直型快套附着体义齿的设计原则、制作方法，评价其疗效。方法：为12例牙列缺损成年患者制作12件垂直型快套附着体义齿，每件义齿设计1副或2副快套附着体，经6个月至2年时间的临床观察。结果：全部病例使用垂直型快套附着体义齿后，固位良好、咀嚼功能好、美观舒适。结论：垂直型快厉型附着本固位好，快套内部的弹性结合产生缓冲作用，使基牙的损伤减少。     

Clinical evaluation of abutment teeth of removable partial denture by means of the Periotest method

Prosthodontics should be one of the means of establishing conditions for the maintenance of periodontal health. The forces applied to the abutment teeth and their effects are very important considerations in the design and construction of the removable partial dentures. This 6-month follow-up clinical study evaluated the degree of mobility of abutment teeth of distal extension and tooth supported removable partial dentures by using Periotest. Two types of clasp design were selected for evaluation. In cases with unilateral and bilateral distal-extension, a clasp design including a T clasp of Roach retentive arm, a rigid reciprocal arm and a mesial rest were used. For the abutments of tooth-supported removable partial dentures, a second clasp design with a cast circumferential buccal retentive arm, a rigid reciprocal clasp arm and a rest adjacent to the edentulous ridges was selected. A total of 68 abutment teeth was analysed. Periotest values were made at the time of denture placement (control) and at 1, 3 and 6 months after the denture placement. The statistical analysis was performed using Friedman test. All analysis was performed at a 0.05 level of significance. The results revelled that no significant changes in tooth mobility were observed during the 6-months follow-up (P > 0.05). In conclusion, our findings suggest that adequate oral hygiene instructions, careful prosthetic treatment planning and regular recall appointments play an important role in preventing changes in abutment tooth mobility caused by removable partial denture placement.     

可摘局部义齿基牙楔状缺损充填修复的疗效评价

目的：比较应用GCFujiIXGP玻璃离子水门汀、Dyract复合材料及银汞合金三种材料对可摘局部义齿基牙颈部楔状缺损的临床修复疗效。方法：79例186颗楔状缺损可摘局部义齿基牙,缺损部位分别用GCFujiIXGP玻璃离子水门汀、Dyract复合材料及银汞合金修复,修复2年后用改良的USPHS系统评价修复体的疗效。结果：银汞合金修复效果好于另外两组。结论：银汞合金适合修复可摘局部义齿基牙的楔状缺损。