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.     

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.     

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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。     

可摘局部义齿与基牙龋研究现状

可摘局部义齿是牙列缺损的一种修复形式,用以恢复咀嚼功能和维持正常的面部外形。患者戴用可摘义齿时应该保持良好口腔卫生,以预防基牙的龋坏。基牙患龋的问题除了与时间、细菌、宿主、食物因素有关外,还受义齿材料、设计、制作工艺等多方面因素的影响,本文就近年来有关可摘局部义齿与基牙龋坏的研究现状进行综述。     

氟化物预防可摘局部义齿基牙龋坏的研究进展

可摘局部义齿是临床上修复牙列缺损的主要方法之一。但戴用后可引起口腔微生态失调,促进菌斑沉积,导致基牙龋病和牙周病发病率升高,基牙丧失而使修复失败。本文就基牙龋坏原因及如何预防基牙龋坏作一综述。     

SD球帽式附着体义齿与传统可摘局部义齿修复后基牙存留状况分析

目的：比较研究SD球帽式附着体义齿和传统可摘局部义齿不同时期基牙的存留状况。方法：选择60例肯氏Ⅰ类牙列缺损患者,分别行SD球帽式附着体义齿（30例）和传统可摘局部义齿（30例）修复,于修复前及修复后半年、1年、2年、4年检查基牙的龋患及牙周情况,并作统计学分析。结果：两种义齿的基牙龋患率有显著性差异（P〈0.05）;而2组病例的基牙牙龈炎、牙周炎发病率无显著性差异（P〉0.05）。结论：在肯氏Ⅰ类牙列缺损的修复中,SD球帽式附着体义齿基牙患龋率远远低于传统可摘局部义齿,但在对牙周组织的损害方面,SD球帽式附着体义齿并不比传统可摘局部义齿更具优越性。     

戴用可摘局部义齿患者基牙龋病的情况调查

目的了解不同人群可摘局部义齿修复患者基牙龋病情况。方法采用随机抽样方法,调查500名患者基牙龋病情况,并按年龄分为35～44岁和65～74岁两个组,另按居住地分为城镇和乡村两组,进行统计学分析。结果年龄65～74岁组基牙患龋率、龋均和菌斑指数均明显高于35～44岁年龄组;同时,乡村组各项调查数据也明显高于城镇组。结论戴用可摘局部义齿更容易造成老龄和乡村患者基牙龋坏。     

应用部分瓷贴面增加卡环固位力

在可摘部分义齿修复中,常见选用的基牙颊面没有足够供卡环固位的倒凹,为增加卡环固位,现常用以下几种方法:1.对基牙作罩冠或烤瓷熔附金属冠修复,形成合适的外形.但此方法磨除的牙体组织多,不适用于无龋坏的基牙,而且烤瓷熔附金属冠价格较高。2.在基     

铸造与冷弯卡环基牙菌斑致龋菌分析

目的 初步探讨可摘局部义齿卡环对基牙健康的影响。方法 对铸造、冷弯卡环可摘局部义齿初截一周前后,基牙菌斑中的主要致龋菌进行分析比较。结果 铸造卡环组初戴一周后,基牙菌斑中粘性放线菌与变形链球菌的百分比分别上升了２．３％和３．８％;冷弯卡环组初戴一周后,上述细菌百分比分别上升了５．９％和３．３％,二者间差异有显著性;铸造卡环组粘性放线菌上升的百分比显著低于冷弯卡环组。结论 可摘局部义齿卡环会增加基牙     

改良冷弯卡环与铸造支架联合应用修复牙列缺损的疗效观察

目的观察改良冷弯卡环联合铸造支架可摘局部义齿修复的临床效果。方法使用成品不锈钢圆丝锻制,配合扁丝弯制钳弯制成半圆形卡环臂、圆形卡环肩部及连接体、扁圆过度卡环体的改良冷弯卡环,与钴铬铸造支托、基托联合应用修复牙列缺损。并对90件改良冷弯卡环联合铸造支架可摘局部义齿戴入后追踪观察2年,了解义齿使用情况和基牙健康状况,并将其与钴铬合金支架义齿、传统冷弯卡环塑料基托义齿的修复效果对比。结果 2年后改良冷弯卡环联合铸造支架义齿基牙状况良好,不良症状明显低于其他两组义齿。结论改良冷弯卡环联合铸造支架可摘局部义齿具有良好的功能,可以获得良好的修复效果。     

充填方式对种植义齿固定螺丝孔粘接强度及密封性的影响研究

 目的　研究不同充填方式封闭种植义齿固定螺丝孔对粘接强度及密封性的影响。方法　制作上颌第一前磨牙种植螺丝固位氧化锆冠试件80件，按照粘接前是否喷砂预处理、充填树脂种类、充填深度随机均分为8组，分别置于墨水溶液7 d，万能材料实验机上对螺丝孔内树脂充填体进行推出测试，记录树脂充填体脱粘接时的瞬间载荷，并取出树脂充填体，显微镜下观察记录并比较充填体染色的范围。结果    是否喷砂及树脂种类对粘接强度的影响均具有统计学意义（P < 0.01）；充填体厚度会显著影响粘接断裂载荷大小（P < 0.01），但对粘接强度的影响无统计学意义（P = 0.09）。喷砂后使用3 mm流动树脂充填微渗漏最少，不喷砂使用2 mm膏状树脂微渗漏最严重，是否喷砂、树脂种类及充填体厚度均对微渗漏有显著影响（P < 0.05）。结论    固定螺丝孔表面喷砂处理可增加粘接强度，减少微渗漏。流动树脂封闭种植义齿固定螺丝孔可获得相似的密封性及高于普通膏状树脂的粘接强度。在一定范围内，增加充填体厚度有助于提高固定螺丝孔封闭树脂的咬合承受力并减少微渗漏。     

可摘局部义齿修复效果的调查

目的：研究可摘局部义齿的治疗结果并探讨与患者满意度有关的因素。方法：通过患者满意度的调查和临床检查，对63例戴可摘局部义齿5年以上的患者的治疗效果进行评价。结果：70％以上的患者对可摘局部义齿满意，约1／5的义齿需要修理，约1／3的修复体与基牙的龋患有关。结论：绝大多数患者戴可摘局部义齿5年后仍可使用修复体。     

Clinico-statistical observation of various prosthetic restorations at the Prosthetic Department, Asahi University Hospital. 4. Circumstances concerning prosthetic method for missing teeth for the duration from April 1986 to March 1987

The statistics for prosthetic restorations used for missing teeth at the Prosthetic Department of Asahi University Hospital from April 1986 to March 1987 were compared with those obtained for an earlier period (April 1983 to March 1984). Fixed bridges and removable partial dentures constituted the majority of the prosthetic restorations for posterior teeth. Fixed bridges were twice more frequently used for anterior teeth during this period than during the previous period. For a single missing tooth, fixed bridges amounted to 90% and removable partial dentures to 10%, as they did in the previous period. For two or more missing teeth, the use of fixed bridges was some what increased compared to the previous period. As in the previous report, the use of so-called one-tooth denture was most frequent for missing lower first molar. For bridges, the average number of missing teeth and that of abutment teeth were 1.3 and 2.4 respectively. Bridges for one missing tooth with two abutment teeth were most frequently used. For removable partial dentures, the average number of missing teeth and that of abutment teeth were 6.1 and 2.8 respectively. Removable partial dentures for two missing teeth with two abutment teeth were most frequently used. Full cast crowns were most frequently used for bridge retainers, followed by facing crowns. Facing crowns were used more than twice as frequently during this period as they were during the previous period.(ABSTRACT TRUNCATED AT 250 WORDS)     

A clinical study of the periodontal status of abutment teeth supporting swinglock removable partial dentures—A pilot study

Eleven patients wearing mandibular swinglock bilateral distal extension removable partial dentures opposing maxillary complete dentures were studied for a period up to 2 years. They had moderate to advanced periodontal disease with retrograde mobility patterns. Periodontal therapy, as well as treatment of dental carious lesions, was completed before fabrication of the prosthesis. Recordings of the gingival status, pocket depth, plaque score, tooth mobility, and dental caries were made at the time of the placement of the prosthesis and thereafter at 6-month intervals. Final results were obtained at the end of 2 years in six patients (group A) and at 1/12 years in five patients (group B).Our findings show that both groups had a statistically significant increase in gingival inflammation. However, no differences in degree of inflammation were observed between the two groups with regard to the status of gingival tissues that were covered and uncovered by the components of the swinglock removable partial denture. Also, no statistically significant differences in pocket depths and plaque scores were found between the time of placement of the swinglock removable partial denture and the final recall visit. Of the 61 abutment teeth, 85.2% had no significant change in mobility, 11.5% showed a substantial decrease in mobility, and 3.3% showed a considerable increase in mobility.The patients were able to successfully wear the swinglock removable partial denture without clinically significant changes in the supporting structures of the abutment teeth.This report is part of an ongoing study to determine the efficacy of swinglock removable partial dentures.     

Relationship of removable partial denture use to root caries in an older population.

The pattern and severity of root caries in a selected older population, living in the community and attending a general dental practice in Bexhill, East Sussex, England, is reported. A total of 146 patients were examined to determine the relationship among removable partial dentures, their design, and root caries. Of those patients, 57% wore removable dentures and had a higher prevalence of exposed root surfaces and root caries, particularly on abutment teeth. In addition, root caries lesions on abutment surfaces were found to be larger and more active than those on nonabutment surfaces.     

先天性缺牙患儿可摘义齿修复61例总结

目的 探讨先天性缺牙患儿可摘义齿修复的方法及特点。方法 对1998—2018年间61例3~12岁先天性缺牙患儿镶配可摘义齿,其中男59例,女2例。根据患儿特点及口内萌出牙的情况,设计可摘义齿。用传统制作方法完成全口义齿21例42件,单颌全口义齿、对颌可摘局部义齿20例40件,上、下颌均为可摘局部义齿20例40件,共计122件。结果 患儿戴用可摘义齿修复后,咀嚼、发音等功能和外貌均得到明显改善。结论 虽然先天性缺牙的病因尚未完全清楚,但均可早期镶配可摘义齿,解决患儿的进食困难,改善外貌及发音,促进患儿的生长发育和身心健康。     

Detection of improvement in the masticatory function from old to new removable partial dentures using mixing ability test

The aim of this study was to determine the sensitivity of the Mixing Ability Test to detect improvement of masticatory function in subjects on transition from old to new removable partial dentures. Thirty-two subjects (seven males, 25 females, mean age 65.0 years) with distal extension partially edentulous area in mandible and/or maxilla participated in the study. The following reasons were presented for replacing the old removable partial dentures with new ones: fracture and/or poor fitness of retainers, extraction of abutment teeth, poor fitness of denture base, severe wear of artificial teeth and request for metal base dentures. Masticatory function with old and new removable partial dentures after an adaptation period (mean 27.4 weeks) was evaluated by the Mixing Ability Test. Subjects were asked to masticate five two-coloured wax cubes with each removable partial denture. Mixing Ability Index was obtained from the colour mixture and shape of the masticated cubes. Wilcoxon signed-rank test was used to test the difference of Mixing Ability Indexes between old and new removable partial dentures. The mixing ability indexes with new removable partial dentures (mean+/- s.d.: 0.70+/- 0.68) was significantly higher (P<0.001) than those with old removable partial dentures (-0.11+/-1.13). The results suggest that the Mixing Ability Test was capable of detecting improvement in masticatory function with new removable partial dentures.     

Statistical analysis of the fabrication of fixed and removable partial dentures (in 2002)

A statistical survey based on laboratory records was performed on the number of fixed partial dentures and removable partial dentures fabricated at the dental hospital of Tokyo Medical and Dental University from April 1 to September 30, 2002. A comparison was also performed with a previous survey that had been carried out in 1997 to detect any change and possible alternations in the near future. From the findings of this statistical survey, the conclusions were as follows: 1. A total of 2,656 fixed and removable partial dentures were fabricated during the six-month period in 2002. 2. The 3-unit fixed partial denture was most common (64.0%), and the number of fixed partial dentures decreased as the number of units increased. 3. For a single missing tooth, a fixed partial denture was more popular (80.8%) than a removable partial denture. 4. For two missing teeth, there was little difference between the number of fixed and removable partial dentures. In the anterior region, fixed partial denture was more common, while in contrast, in the posterior region, removable partial denture was more common.     

老年人可摘局部义齿折裂的设计因素

目的：分析老年人可摘局部义齿折裂的设计因素，旨在提高可摘局部义齿的设计水平和质量。方法：通过对临床上216例老年人可摘局部义齿折裂病例的观察，根据王征寿分类法归纳各类义齿折裂的常见类型，分析其中的薄弱环节和设计因素。结果：一类义齿咬合低时易发牛近远中向折裂；二类义齿咬合紧时常在游离端远中发生近远中向折裂，尤以上颌结节和磨牙后垫部位多见；三类和五类义齿的舌腭侧基托常在两个缺牙区之间尤其是靠近缺牙区的部位发牛与牙弓相交叉的折裂；四类义齿常发牛人工牙脱落或腭侧基托横折；人类义齿舌腭侧基托易发生纵折，折裂线常位于人工牙与基牙交界处。以上可摘局部义齿折裂的发生部有其设计与制作上的原冈，作者对此提出了相应的对策。结论：应特别注重义齿的抗折设计，这是提高可摘局部义齿修复质量的重要环节。