磁性附着体覆盖义齿修复的临床观察

目的：通过临床复查,观察评价Magfit磁性附着体覆盖义齿的中长期效果。方法：对北京大学口腔医学院修复科近7年应用磁性覆盖义齿修复的患者进行复查,共9l例患者,97副磁性覆盖义齿,144对磁性附着体,观察附着体和基牙以及义荫的情况。复查内容主要有附着体的适合性、表面性状、基牙健康状况以及义齿的完整性等。结果：大部分患者修复效果满意,84．7％的基牙松动度状况不变或好转,11．8％的磁体和6．9％的衔铁曾出现脱落,11颗基牙拔除或脱落,长期应用的附着体磨耗较明显,未见基牙继发龋坏。结论：Magfit磁性附着体能够改善总义齿和局部覆盖义齿的固位与稳定,提高患者满意度。临床上发现脱落、磨耗、义齿折断等问题,需要对症解决。     

老年患者磁性附着体活动义齿修复的临床研究

目的：评价老年患者应用磁性附着体进行活动义齿修复的效果。方法：用89副Magfit磁性附着体为51例牙列大部缺损的老年患者进行义齿修复,并随访观察6个月-5年。结果：所有磁性附着体义齿在固位和稳定、咀嚼功能、语音功能、外观、舒适性、坚固性等随访指标上均获得较满意效果,仅21颗基牙出现龈缘炎,无继发龋或基牙松动、脱落。结论：磁性附着体义齿有利于保留老年患者余留牙根,减少牙槽骨吸收,提高义齿舒适性,有效改善了老年患者活动义齿修复效果。     

Magfit磁性附着体在老年患者全口覆盖义齿的应用体会

目的:通过对老年患者单颌全口覆盖义齿中应用磁性附着体的病例进行总结和分析,对其修复效果作出评价。方法:回顾了我科67例老年患者单颌全口覆盖义齿中应用共84副磁性附着体的病例,并跟踪随访2-5年。结果:经随访观察,所有患者对这类义齿的固位、外观、舒适性、坚固性均较满意。仅1颗基牙继发龋(1.2%,1/84),3副磁体出现脱落(3.6%,3/84),23颗基牙有牙龈炎(27.4%,23/84),未出现基牙松动,脱落。结论:磁性附着体利于保留老年患者余留牙根,提高义齿固位力,在老年患者单颌全口覆盖义齿中可取得良好的修复效果。     

磁性附着体在全口覆盖义齿中的临床应用与效果评价

目的评价磁性附着体应用于全口覆盖义齿的临床修复效果。方法采用Magfit EX-400/600磁性附着体为18例患者制作24件全口覆盖义齿,测定粘固前后义齿的咀嚼效率,并对患者进行6³6个月随访观察,调查义齿满意度。结果患者对磁性附着体覆盖全口义齿效果满意,粘固磁体后,咀嚼效率较粘固前显著提高(P<0.01)。随访中出现4例基牙牙龈炎,1例基托折裂,未发现继发龋和基牙松动,所有义齿固位效果满意。结论应用磁性附着体可有效改善全口覆盖义齿的修复效果,值得在临床上推广应用。     

63副磁性附着体在全口覆盖义齿中的临床应用体会

目的:评价磁性附着体应用于全口覆盖义齿修复的效果。方法:用63副Magfit和Magdisc磁性附着体为28例牙列缺损患者进行覆盖义齿修复,并随访观察2年。结果:63副磁性附着体中1副失败,9颗基牙出现龈缘炎,未发现继发龋、基牙松动、义齿折裂、根面板脱落;所有覆盖义齿固位效果满意。结论:Magfit和Magdisc磁性附着体能有效改善覆盖义齿的固位,并发症少,具有较好的应用前景。     

Magfit磁性附着体在下颌覆盖义齿的应用

目的评价磁性附着体在下颌覆盖义齿的临床应用效果。方法为22例患者制作Magfit磁性附着体下颌覆盖义齿,在磁体黏接前后以及戴牙半年时,比较咀嚼效率;用VAS(visualanaloguescale)标尺法由患者自己对义齿的满意程度在上述3个时间点打分,比较VAS评分。在修复开始前及戴牙半年时,比较基牙的牙周情况。结果磁体黏接前、黏接后及戴牙半年时,咀嚼效率、VAS评分差异有显著性(P<0.01)。戴用义齿半年后,所有基牙未发现新发生的根面龋坏及根折,牙周状况均有不同程度的改善,戴牙半年时与磁体黏接时的基牙松动度差异有显著性(P<0.05)。结论磁性附着体用于下颌覆盖义齿,可以改善义齿的咀嚼功能及基牙的牙周状况。     

磁性附着体与冠外附着体联合应用的临床观察

目的探讨磁性附着体与冠外附着体联合应用的临床效果。方法对22例多数牙缺失伴残根残冠的患者,采用磁性附着体与冠外附着体联合修复治疗,随访2～4年,调查患者对义齿使用的满意情况,以及基牙和修复体的情况。结果患者对义齿的咀嚼功能、稳定性及美观性均满意。临床检查未发现基牙松动及继发龋,1例患者出现基牙周围骨吸收,5例患者出现基牙牙龈炎,1例患者修复2年后出现咀嚼痛,5例患者2年后出现义齿松动,经对症处理后义齿均继续正常使用。结论对于多数牙缺失并伴孤立残根残冠的患者,采用磁性附着体与冠外附着体的联合修复可获得良好的临床效果。     

磁性附着体在下颌全口覆盖义齿应用中常见的问题及处理

目的：观察磁性附着体应用于下颌全口覆盖义齿常见的问题，并探讨预防或解决的方法。方法：用Magfit EX系统为23名患制作下颌全口覆盖义齿，共制作磁性附着体57个，观察1～1．5年，了解使用中发生的问题。结果：57个磁性附着体有2个磁体脱落，1个根面板脱落，57个基牙5个发生龈缘炎，1个发生继发龋，游离端基牙远中骨吸收5例(以每一侧为1例计算)，23副下颌覆盖总义齿，3副折断，根面板及磁体未见明显腐蚀，磁力无明显减退。结论：Magfit磁性附着体适用于下颌覆盖总义齿，临床上常见的问题都能预防或对症处理。     

高钉帽磁性附着体义齿在下颌牙槽嵴低平患者的应用

目的 高钉帽磁性附着体义齿在下颌牙槽嵴低平患者中的临床应用观察。方法 对15例下颌牙槽嵴低平患者采用高钉帽磁性附着体可摘义齿修复并进行2年的随访观察。结果 高钉帽磁性附着体可摘义齿修复患者的基牙牙槽骨吸收少,基牙松动度改变小,满意度高。结论 对于下颌低平牙槽嵴患者且基牙牙周情况良好的患者,高钉帽磁性附着体可摘义齿是一种较好的修复方式。     

磁性附着体和球帽附着体在下颌覆盖全口义齿修复中的临床对比研究

目的:比较研究磁性附着体、球帽附着体和传统卡环固位体在下颌可摘局部义齿修复中的临床效果。方法:选择45例牙列缺损患者分别行磁性附着体、球帽附着体和传统卡环固位的下颌可摘局部义齿修复,对患者的满意度和基牙的牙周健康情况进行3年随访。结果:患者满意度比较结果显示磁性附着体组和球帽附着体组分别与传统卡环固位组在美观性、固位情况、舒适程度方面有差异且具有统计学意义(P<0.05),磁性附着体组与球帽附着体组固位情况和舒适程度有差异且具有统计学意义(P<0.05);牙龈指数临床检测结果显示磁性附着体组、球帽附着体组、传统卡环固位组组间两两比较其差异均具有统计学意义(P<0.05);基牙松动度临床检测结果显示磁性附着体组、球帽附着体组、传统卡环固位组组间两两比较其差异均具有统计学意义(P<0.05);牙周袋深度临床检测结果显示磁性附着体组和球帽附着体组与传统卡环固位组均有差异,且具有统计学意义(P<0.05);牙槽骨高度X线测量结果显示磁性附着体组、球帽附着体组、传统卡环固位组组间两两比较其差异均具有统计学意义(P<0.05)。结论:磁性附着体在修复下颌覆盖义齿时能够提供满意的固位力,更好的保护基牙牙周组织健康,较之球帽附着体具有一定的优越性;下颌使用精密附着体固位的覆盖义齿较传统卡环固位的可摘局部义齿在临床疗效上具有一定的优越性。     

附着体固位可摘义齿临床应用

目的：观察不同类型附着体固位可摘义齿的临床效果。方法：采用冠外精密附着体、磁性附着体、套筒冠作为固位装置制作可摘义齿,对游离端缺失下颌义齿和多牙缺失病例32例进行修复。随访6个月～3年,对义齿美观舒适性、固位力、咀嚼功能、摘戴适应情况及基牙松动、义齿下沉加衬情况进行观察。结果：所有病例对义齿美观舒适、固位力、咀嚼功能均感满意。30例对义齿摘戴适应（93．75％）,2例感到义齿摘取不便（按扣式、套筒冠义齿各1例）。结论：附着体固位可摘义齿兼有固定、活动义齿的优点,能达到良好的临床修复效果。     

Magnetic attachment for esthetic management of an overdenture

Magnetic attachments are a popular means of retaining removable overdentures and maxillofacial prostheses.(1) When used in anterior regions, these attachments often are not esthetic because the metallic color of the cast coping or attachment can be seen directly or through the denture base. An esthetic magnetic attachment with a composite facing can be fabricated to overcome this problem.     

OT球帽状附着体固位型活动义齿的临床应用

目的 介绍OT球帽状附着体固位型活动义齿的设计，制作方法，评价其临床效果。方法 采用OT球帽状附着体为15例患者设计制作18件义齿。结果 最长者经2年零6个月观察。临床效果良好。结论 患者戴用该义龄后，咀嚼功能良好。摘戴方便，美观舒适，基牙无病变。     

精密附着体固位型可摘义齿

目的:介绍精密附着体固位型义齿的设计原则,制作方法,评价其临床效果。方法:采用Bredent球状和杆状精密附着体系统,为21名患者设计制作了30件义齿,53副精密附着体。结果:最长者经3年零10个月观察,临床效果良好。结论:患者戴用该型义齿后,咀嚼功能好,稳固、摘戴方便、美观舒适,基牙无病变     

“O”RING附着体固位型活动义齿的临床应用

目的 :介绍“O”RING附着体固位型活动义齿的设计原则、制作方法 ,评价其临床效果。方法 :采用“O”RING附着体为 2 5名患者设计制作 30件义齿。结果 :最长者经 5年零 6个月观察 ,临床效果良好。结论 :患者戴用该义齿后 ,咀嚼功能良好 ,摘戴方便、美观舒适 ,基牙无病变     

Extracoronal resilient attachments in distal-extension removable partial dentures.

Esthetics is often compromised in patients who wear removable partial dentures with metal clasps placed on anterior teeth. Clinical procedures are presented for a new design of a removable partial denture that improves esthetics and function through a new dental attachment. The extracoronal resilient attachment system offers vertical resiliency and universal stress relief for use where a resilient prosthesis is indicated. The removable partial denture retained by these attachments provides esthetics, vertical resiliency, and easy replacement of worn attachments.     

In vitro study of a mandibular implant overdenture retained with ball,magnet, or bar attachments: comparison of load transfer and denture stability

PURPOSE: When implants are used to support a removable overdenture, the optimal stress distribution to minimize both forces on the implants and denture movement is desirable. This study compared the stress patterns generated around implants and denture movement among three retention systems. MATERIALS AND METHODS: Two root-form implants were anchored in a mandibular model made of resin, and a removable overdenture on which all experiments were performed was fabricated. The surface of the model was covered with a layer of impression material to simulate oral mucosa. Ball/ O-ring, bar/clip, and magnetic attachments were used. A vertical force was applied to the left first molar and gradually increased from 0 to 50 N in 5-N steps. The resultant stress distribution and denture movement were evaluated. RESULTS: The ball/O-ring attachment transferred the least stress to both implants and produced less bending moment than the bar/clip attachment. Vertical force applied to the bar/clip attachment created immediate stress patterns of greater magnitude and concentration on both implants. CONCLUSION: This in vitro study suggested that the use of the ball/O-ring attachment could be advantageous for implant-supported overdentures with regard to optimizing stress and minimizing denture movement.     

Composite resin root coping with a keeper for magnetic attachment for replacing the missing coronal portion of a removable partial denture abutment

Numerous methods for replacing missing removable partial denture abutments have been introduced, however, most of them are time consuming and require several visits to complete the procedure. Since magnetic attachments can provide support and bracing as well as retention for overdenture abutments, the remaining tooth root structure can be used to support the coping with the keeper. Through the use of composite resin and adhesive material, improved retention of the keeper to the root may be achieved, along with improved esthetics. This article describes a method for replacing the missing abutment of a removable partial denture with a magnetic attachment, and a composite resin coping with a keeper.