精密附着体义齿修复游离端牙列缺损的临床应用

目的　应用精密附着体固位型可摘义齿修复游离端牙列缺损 ,评价其临床修复效果。方法　采用拴体拴道式、插销式及根面磁性精密附着体 ,为 11例游离端牙列缺损患者制作 11件精密附着体义齿 ,观察修复效果。结果　随访 0 5～ 2年 ,患者均感义齿美观舒适 ,固位稳定性强 ,咀嚼功能好 ,检查基牙无病变。结论　精密附着体固位型可摘义齿用于游离端牙列缺损 ,修复效果良好。     

冠外附着体义齿修复游离端牙列缺损的临床应用

目的观察Ceka冠外精密附着体应用于游离端牙列缺损修复的临床疗效。方法58例游离端牙列缺损患者,其中单侧游离端牙缺失35例,双侧游离端牙缺失23例。共制作Ceka冠外附着体义齿58件,每件义齿含2副附着体或1副附着体和1个联合卡环。修复后追踪1~6年。结果Ceka冠外附着体义齿美观、舒适,固位稳定性较好,咀嚼效能较高,并发症少。结论Ceka冠外附着体是一种较为理想的游离端牙列缺损修复的固位体。     

磁性附着体固位的固定-可摘式部分义齿

目的:应用磁性附着体解决固定)可摘式部分义齿的固位稳定问题。方法:将Magfit EX磁性附着体用作基牙冠外固位体,应用导面板、栓体栓道作为义齿的稳定装置,制作固定)可摘式部分义齿,并观察其应用效果。结果:15例患者的远中游离端缺损牙列被成功修复。经12~42月的随访观察,磁性附着体固位的固定)可摘式部分义齿具有良好的固位和稳定,义齿咀嚼效果良好,外形美观,体积小巧,使用舒适。结论:磁性附着体能满意地解决固定)可摘式部分义齿的固位稳定问题,显著提高义齿的修复质量。     

球帽式附着体用于老年游离端缺牙修复的临床研究

目的：观察球帽式附着体用于老年游离端缺牙病例修复的临床效果。方法：以球帽式附着体作为固位体,对46例老年游离端缺牙病例进行可摘局部义齿修复,随访0．5～4年,对患者主诉、基牙情况、活动义齿及附着体使用情况进行观察。结果：义齿佩戴舒适,美观,固位力好,取戴方便,咀嚼功能恢复良好。1例基牙出现牙髓炎症状;3例附着体帽部脱落重粘。结论：球帽式附着体适用于老年游离端缺牙病例的修复治疗,能够获得良好的临床疗效。     

键槽缓压式附着体义齿的临床应用

目的采用键槽缓压式附着体义齿修复后牙游离缺失,评价其临床效果。方法采用键槽缓压式附着体(ASC-52),为18例游离端牙列缺损患者行附着体义齿修复,随访1~4年,通过患者主观感觉、口腔检查、X线检查3方面评估修复效果。结果患者感觉舒适,异物感较小,固位稳定性好,功能行使好,基牙及牙槽嵴无病变。结论键槽缓压式附着体义齿修复游离端牙列缺损效果良好,是一种理想的牙列缺损修复的固位体。     

MK1冠外被动制锁式附着体义齿的临床应用

目的 探讨MK1附着体义齿修复远中游离缺失的临床效果.方法 33例双侧或单侧远中游离端牙缺失患者行MK1附着体义齿修复,随访2个月～2年.结果 1例修复2年时出现咀嚼痛,检查发现缺牙区牙槽骨吸收,重衬可摘义齿后症状消失.1例锁轴脱落,重配卡簧.其余患者反映义齿固位良好,异物感小.结论 MK1附着体义齿适宜修复远中游离端牙缺失.     

球状快套附着体固位可摘局部义齿的临床应用

目的为了探讨球状快套附着体在可摘局部义齿的临床应用。方法作者对9名游离端缺失的患者利用20颗基牙用球状快套冠外附着体26个，2颗基牙用桩帽附着体2个，桥接片按扣式附着体2个，制作12件球状快套固位义齿。经3个月至2年时间的临床观察。结果发现附着体能很好地保护基牙，其固位的活动义齿稳定性能好，咀嚼效率高，美观舒适卫生。结论球状快套附着体固位可摘局部义齿是一种固定一活动联合修复体，兼有固定和活动义齿的优点，值得临床推广应用。     

��ñʽ�������޸������ȱʧ��18���ٴ�Ч������

目的评价球帽式附着体修复游离端缺失牙的临床效果。方法选择2010年5月至2012年5月就诊于中国医科大学口腔医学院修复科的KennedyⅠ、Ⅱ类牙列缺损患者18例，对可保留的残根残冠进行完善的根管治疗后，使用球帽式附着体作为固位体进行义齿修复，并对其使用效果进行6个月至2年的临床随访观察。结果球帽式附着体用于游离端缺失牙修复后，基牙基本未受到损害，有2例基牙患有牙龈炎，患者对义齿美观、舒适、固位、稳固和咀嚼性能等方面均比较满意。结论球帽式附着体可以改善可摘局部义齿修复后的美观及功能，且有利于基牙的保护。     

双侧游离缺失套筒冠义齿中Nobilium直型铰链的制作及应用

目的介绍双侧游离端缺失的套筒冠义齿附加直型铰链的技工操作及应用。方法在套筒冠与金属支架连接上使用可活动的直型铰链,形成固位体与游离端义齿应力中断式连接的套筒冠义齿。口内试戴,粘固内冠,观察修复效果。结果直型铰链用于远中游离缺失义齿可允许义齿远中游离部分受力时出现适当下沉,减轻对基牙的负担并有效地预防义齿折断。结论直型铰链可以应用于双侧游离端缺失的套筒冠义齿,制作过程中应特别注意双侧铰链必须互相平行。     

两种游离端半精密附着体可摘局部义齿的应力分析

目的:研究双侧游离缺失活动义齿使用两种不同类型的半精密附着体固位时周围支持骨的表面应力。方法:采用电阻应变测量法在人体下颌骨标本上测量以冠内栓道式及冠外垂直杆式半精密附着体固位的双侧游离缺失活动)固定联合修复体的表面应力值并做统计分析。结果:冠内附着体在基牙周围牙槽骨上产生的总体应力较大,而冠外附着体在缺牙区牙槽嵴和近缺隙侧基牙远中颈部牙槽嵴上产生的应力较大。结论:冠内附着体适用于远中基牙牙周条件良好的情况,而冠外附着体则适用于缺牙区牙槽嵴条件良好、远中基牙条件相对欠佳的情况。     

Comparison of load transfer by maxillary distal extension removable partial dentures with a spring-loaded plunger attachment and I-bar retainer.

This study photoelastically compared the stress distribution characteristics of two maxillary bilateral distal-extension removable partial denture designs, one using I-bar retention and the other using a semiprecision spring-loaded plunger attachment. Each prosthesis was subjected to vertical and horizontal extension-base loads. Comparisons were made from photographic recordings of isochromatic fringe distributions. The two retention designs produced comparable stresses with splinting of abutments for the plunger attachment. The attachment-retained prosthesis proved less stable with some loadings. Stress patterns followed three trajectories in the maxilla. A basis for stress distribution comparisons to other maxillary removable partial denture attachments is established.     

Load transfer by a maxillary distal-extension removable partial denture with cap and ring extracoronal attachments.

This study photoelastically compared the stress distribution characteristics of maxillary, bilateral, distal-extension removable partial dentures retained by light and heavy ERA extracoronal attachments. One prosthesis included supporting rests and the other had no rests. Both designs were tested with and without abutment splinting. The most favorable stress distributions were obtained with light retention elements, supporting rests, and splinting of the abutments. In this configuration the attachment prosthesis compared favorably in stress distribution with the maxillary I-bar retained removable partial denture in a previous study that used a comparable maxillae model.     

The mandibular first premolar as an abutment for distal-extension removable partial dentures: a modified clasp assembly design

Sound mandibular first premolars can be used as sole abutments for bilateral distal-extension removable partial dentures, if the denture is designed to minimise the torque applied to the abutment teeth. A simplified modification of the conventional torque-releasing clasp-assembly designs is suggested for these teeth. This modification entails a mesial rest on each abutment tooth connected to the distal proximal plate via a lingual bracing arm. A circumferential clasp arm is optional for buccal retention of the removable partial denture. As with conventional designs, the metal framework is designed to permit some rotational tissueward movement of the distal extension bases, yet not compromise the retention and stability of the prosthesis.     

An intracoronal semiprecision retainer for removable partial dentures--the Thompson dowel

An intracoronal semiprecision retainer for removable partial dentures has been described. The advantages, disadvantages, and indications for use of the semiprecision retainer have been detailed and compared with those of other types of intracoronal retainers.The versatility of design, combined with retention, stressbreaking features, and an effective method of indirect retention, make this semiprecision retainer the one of choice for mesial- and distal-extension removable partial dentures.     

Adhesive attachments for removable partial dentures

Since twenty years adhesive dentistry plays a certain role in the design of removable partial dentures. With the use of adhesive attachments the esthetics and retention of a removable partial denture can be improved. To apply these attachments successfully the contour of a sound abutment has to be corrected by grinding to provide retention and resistance. The procedures for constructing removable partial dentures with adhesive attachments are described. It is recommended to apply adhesive attachments in the general dental practice.     

A Technique for Retrofitting a Metal Ceramic Crown to an Attachment‐Retained Removable Partial Denture: A Clinical Report

In dental applications, precision attachments have been used to retain removable partial dentures (RPDs) for several decades. Various types of extracoronal attachments are commonly used in combination with fixed partial dentures and RPDs to achieve retention and stability. Fracture of the framework, fracture of the roots or teeth, and irretrievable decrease of retention are common reasons for a failed attachment‐retained RPD. Another complication of metal ceramic crowns with precision attachment is decementation of the crowns. When fixed components of the attachment‐retained RPD fail, the traditional treatment approach requires remaking both the fixed and removable components of the attachment‐retained RPD. This technique describes retrofitting of a metal ceramic crown to a resilient attachment‐retained RPD.     

Precision attachment removable partial dentures.

Although added preparations and skill are required to provide precision attachment removable partial dentures, more favorable esthetics and load distribution may outweigh the disadvantages. Basic design principles, categories (intracoronal, extracoronal, stud, bar and plunger) and selection of precision attachments are reviewed.     

Effect of two clasping assemblies on arch integrity as modified by base adaptation

It is quite apparent from the results of this experiment that the importance of tissue support for distal-extension removable partial dentures cannot be overstated. It would appear that good adaptation of the base far outweighs the importance of clasp design on a well-fitting framework for a distal-extension removable partial denture. When appropriate, regular recall evaluation of removable partial dentures and implementation of indicated readaptive procedures are not available, close base adaptation can be lost because of ridge resorption. As this loss occurs, the clasp design begins to play an increasingly influential role in abutment tooth movement during function.     

不同设计形式RPD对支持组织应力分布影响的光弹分析

目的:探讨分裂式设计与RPI设计制作的钴铬合金铸造支架RPD修复KennedyⅠ类缺损对支持组织应力分布的影响,为优化义齿设计提供实验依据。方法:分别以分裂式设计和RPI设计两种设计形式的钴铬合金铸造支架RPD修复下颌牙双侧游离缺失,用三维光弹应力冻结切片技术测试义齿加载后对基牙和缺牙区牙槽骨的应力分布,并加以分析比较。结果:钴铬合金分裂式设计的铸造支架RPD承受压力沿基牙牙体长轴传导,基牙远中所受扭力较小。结论:对于KennedyⅠ类牙列缺损,钴铬合金分裂式设计的铸造支架RPD使支持组织受力均匀、合理,减小了基牙受到的扭力,达到基牙保护的目的,是一种值得推广的设计。     

Comparison of vertical movement occurring during loading of distal-extension removable partial denture bases made by three impression techniques.

Although the altered-cast impression technique attains stability and controlled tissue support for distal-extension removable partial dentures, the procedure is time-consuming and technique-sensitive. This study clinically compared the vertical displacement of distal-extension removable partial dentures made from different impression techniques. The impressions studied were the altered-cast impression, an impression made from a border-molded custom tray, and a stock tray irreversible hydrocolloid impression that served as a control. A post hoc analysis, using a Tukey Q-test, exhibited significance (p less than 0.01) between the two impression techniques after intraoral loading was performed. Although statistically significant, the 0.19 mm difference between the impression techniques may or may not be clinically relevant. Additional research is required in this area.