The overdenture concept

The biomechanical rationale for the treatment of patients with overdentures, and their advantages and disadvantages are presented. The indications and contraindications for the treatment of partially edentulous patients with removable partial overdentures are discussed. The patient's and dentist's responsibilities for the success of therapy are enumerated.     

种植体支持球帽附着体固位下颌覆盖全口义齿的临床应用

目的:评价种植体支持球帽附着体固位的下颌覆盖全口义齿临床应用效果.方法:随机选择15例下颌无牙颌患者,每例植入2枚种植体,共植入30枚,随访观察1-12个月,从患者满意度、临床检查及种植体X线片观察修复效果.结果:种植体支持覆盖全口义齿修复下颌无牙颌,义齿固位和咀嚼功能满意率分别为100％和93.3％,义齿稳固,咀嚼功...     

27例磁性附着体固位种植覆盖义齿临床体会

目的：评价磁性附着体固位种植覆盖义齿在牙槽骨严重吸收的无牙颌患者中运用的临床效果。方法：27例牙槽骨严重吸收的无牙颌患者,植入2—4枚牙种植体,3-6个月后进行种植体支持式磁性附着体固位覆盖义齿修复,定期复查,随访8—79个月。采用临床检查、x线检查和患者主观感受问卷来评价此类义齿的修复效果。结果：27例患者61枚种植体,1枚在修复前由于种植体周围炎松动被拔除,3枚在覆盖义齿修复后发生种植体周围炎松动被拔除,其余种植体均稳固无松动;27件种植覆盖义齿的固位、稳定、咀嚼功能均良好,患者满意度高。结论：运用磁性附着体固位种植覆盖义齿修复牙槽骨严重吸收的无牙颌能很好的恢复咀嚼功能,且制作方法简单,值得临床大力推广。     

Mandibular implant-retained overdenture with magnets: a case report

Implant-retained overdentures can be a simple treatment option to restore the edentulous mandible. Retention can be achieved via studs, linked bar system or magnets. Success rates using the different retention mechanisms have been reported to be high. However, long-term prospective studies on implant-retained overdentures are limited. This paper reports on a patient who has successfully worn a mandibular implant-retained overdenture with magnets for 12 years.     

The mandibular complete overdenture

Mandibular complete overdenture treatment has been available for decades, but its use was limited when the treatment relied on retained teeth as overdenture abutments. This treatment, however, is currently experiencing more popularity than ever before. In fact, dentistry may be experiencing a philosophical shift, in which mandibular implant overdenture treatment may become the new standard of care for the treatment of the edentulous mandible. Practitioners are looking for simplified treatments that can provide cost-effective alternatives to more complex implant prosthodontic procedures. Implant overdentures provide a strong return for the investment in treatment time and expense and are a treatment suited to the lower socioeconomic status of many edentulous patients. The clinical outcome of this treatment is significantly better than that achieved with conventional mandibular dentures, especially when patients are experiencing technical problems because of compromised prosthesis retention or stability.     

小直径种植体在无牙颌覆盖义齿修复中的应用

目的：探讨Sterngold太极扣种植体覆盖义齿在下颌无牙颌修复中的临床运用。方法：13例牙槽骨严重吸收的无牙颌患者的下颌植入26枚Sterngold太极扣种植体,太极扣附着体覆盖义齿修复,术前术后评估种植体周围的骨质及牙龈的健康状况,检查修复体的戴用状况,评价患者的满意度。结果：26枚种植体全部成活,未发生种植体周围炎,X线片检查显示种植体周围的骨质未见吸收,全部患者对修复体满意。结论：太极扣种植体覆盖义齿修复严重吸收的牙槽嵴病例临床效果满意。     

球帽附着体种植覆盖全口义齿在下颌无牙领的应用

目的:了解球帽附着体种植覆盖义齿及脱钙人牙基质材料(DDM)在牙槽骨萎缩的下颌无牙颌的临床应用效果.方法:采用Frialit-2及Xive种植系统及骨又生-脱钙人牙基质材料(DDM)同期对17例牙槽骨萎缩的下颌无牙颌进行2枚种植体支持固位式球帽覆盖全口义齿修复.结果:经过1～2年的临床观察,种植体稳固,义齿功能优良,明显提高了患者的生活质量.结论:对严重萎缩牙槽嵴的下颌无牙颌患者,采用脱钙人牙基质材料(DDM)及种植覆盖总义齿进行修复,能有效地恢复功能,临床效果满意.     

Technical tips for constructing a maxillary implant-supported overdenture by using a double-impression technique

Implant-supported overdentures have become a popular treatment option for completely edentulous patients. Functional loads should be optimally distributed to the mucosa and the abutments. This article describes a functional double-impression technique for fabricating a maxillary implant-supported overdenture.     

Attachment of clips in a bar-retained maxillary implant overdenture: a clinical report

Implant-supported overdentures are a good alternative for patients with conventional dentures that lack retention and stability. The most common prosthetic complications in mandibular and maxillary implant-supported overdentures are fracture and loosening of the attachment system. This clinical report describes the treatment of a completely edentulous patient with sinus floor elevation by using bone from the iliac crest and the insertion of 4 implants in the maxilla and mandible followed by implant-supported overdentures. The technical procedure for the attachment of clips to an acrylic resin overdenture base with the use of metal reinforcement is described. The advantage of this attachment procedure is an improved attachment system with less fracture and less loosening of the clips.     

种植全口覆盖义齿应力分布的三维有限元分析

目前种植技术在无牙颌患者中应用广泛,但随之亦发现种植固定义齿的一些不足,所以种植覆盖义齿应运而生,并以其特有的优势得到了越来越多的关注,那么种植体支持的覆盖义齿在固位方式、种植体的数量和植入部位等方面该如何选择和把握呢?本文利用三维有限元的分析方法,研究受力状态下的无牙颌种植覆盖义齿应力分布状况,并对应力分布的影响因素进行探讨,拟为种植覆盖义齿应力分布均匀,优化种植覆盖义齿的临床修复设计提供理论依据,从而提高种植覆盖义齿的远期成功率.     

种植套筒冠义齿修复无牙颌的临床效果观察

目的 探讨种植套筒冠义齿修复无牙颌的临床效果.方法 15例无牙颌患者,采用种植套筒冠义齿修复.共完成26件修复体,其中上颌义齿11件,下颌义齿15件.共植入种植体104颗,修复基台研磨后直接作为套筒冠内冠,套筒冠外冠采用失蜡铸造技术加工.修复后平均回访32个月,对所有种植体及上部结构进行临床及影像学检查,并对原总义齿和种植套筒冠义齿满意度进行比较.结果 完成种植体支持修复的26件覆盖义齿,所有上部修复体的外冠与种植体基台间固位较好、义齿稳定,患者对覆盖义齿的舒适度和咀嚼功能满意,在舒适度和咀嚼功能方面,患者的种植套筒冠义齿满意度要高于常规总义齿,差异有统计学意义(P<0.05),而发音方面二者差异无统计学意义(P>0.05).覆盖义齿在观察时间内未发生松动、折断及损坏,种植体无松动或脱落.随访期内,种植体周围牙槽骨平均垂直骨吸收量约1 mm.结论 本研究结果表明,种植套筒冠义齿修复无牙颌是一种可靠的方法,但仍需要进一步长期观察.     

CDIC种植体联合磁性附着体在种植覆盖义齿修复中的临床应用

目的：探讨CDIC种植体联合磁性附着体制作种植覆盖义齿修复牙列缺失的临床效果。方法：选取12例牙槽嵴萎缩或全口义齿固位不良的牙列缺失患者,在CDIC组合式骨内结合种植体支持的基础上,行磁性附着体覆盖义齿修复,对义齿的固位、咀嚼功能和使用情况进行2年的随访观察。结果：31枚种植体修复前均达到骨结合,平均愈合周期5个月;磁性附着体覆盖义齿修复后,义齿稳定,咀嚼功能、容貌改善明显,达到患者对美观和功能的要求。结论：CDIC种植体联合磁性附着体制作的种植覆盖义齿是修复牙列缺失的一种行之有效的方法,其性价比高,更宜临床推广应用。     

The implant-supported milled-bar mandibular overdenture

Osseointegrated dental implants have been proven successful in the treatment of edentulism. The predictability of the implant‐supported prosthesis has also been established. Several techniques have been described for the successful restoration of the edentulous mandible: fixed‐detachable prostheses with either the original Brånemark hybrid prosthesis design or conventional implant‐supported fixed partial dentures, implant‐retained overdentures, and implant‐supported overdentures. However, in cases of advanced ridge resorption in which facial tissue support is needed from the flanges of the prosthesis or when a removable type of prosthesis is preferred by the patient, an implant‐supported prosthesis is indicated. Electric discharge machining is often used in the fabrication of the bar for an implant‐supported overdenture. This procedure is very costly and technique sensitive. An alternative procedure to fabricate a milled‐bar implant‐supported overdenture is described. This procedure is simple and uses inexpensive equipment and materials. The milled‐bar minimizes lateral and rotational displacement. The overdenture incorporates attachments that provide retention, minimizing possible movement along the path of insertion. This type of prosthesis is available to a broad patient population, especially those with advanced ridge resorption, providing an excellent result at a reduced cost.     

种植体支持磁性附着体固位覆盖义齿的临床应用

目的评价种植体支持的磁性附着体固位覆盖义齿的临床应用及其效果。方法1999年11月至2005年3月，完成种植体支持磁性附着体固位的覆盖义齿修复25例。本组25例，男性14例，女性11例，年龄45～79岁（平均67．6岁）。本组共使用95枚种植体。随访时间6～70个月。随访期间采用临床检查和X线检查评估。结果95枚种植体植入过程中未发生感染和神经损伤等并发症；覆盖义齿固位效果良好，达到患者对义齿功能和美观的要求；患者清洁基台和义齿方便，疗效满意。1例Komet种植系统上部基台戴义齿0．5年后折断，1例Frialit-2种植体戴义齿2年后脱落，其余种植体骨结合状态稳定。结论种植体支持的磁性附着体固位的覆盖义齿临床效果可靠，制作方法简单，便于患者清洁基台和义齿，尤其适合老年无牙颌患者。     

磁性附着体在种植覆盖义齿中的临床应用

目的:评价磁性附着体在种植覆盖义齿中的临床应用效果。方法:2000年8月至2010年3月,完成磁性附着体固位的种植覆盖义齿24例,共植入57颗种植体,其中颌骨缺损6例,植入15颗种植体;无牙颌18例,植入42颗种植体。随访6～98个月,对种植体和修复体进行临床检查和X线检查。结果:57颗种植体均达到良好的骨结合并且骨结合状态稳定;覆盖义齿固位良好,达到患者对义齿功能和美观的要求。结论:磁性附着体固位的种植覆盖义齿临床效果可靠,摘戴容易,便于清洁。     

下颌磁性附着体覆盖全口义齿的临床疗效观察

目的：调查磁性附着体覆盖全口义齿修复的临床效果。方法：对9例磁性附着体患进行义齿满意度问卷调查分析，并检查患基牙临床指征及牙周微生态的情况。结果：患对磁性附着体义齿固位稳定功能满意度最高；基牙的微生物组成与正常值相比有一定的变化，但戴牙前后基牙临床指标无明显变化。结论：适当的修复以及良好的口腔卫生条件下，下颌磁性附着体覆盖全口义齿是一种有效、可行的修复方式。     

种植套筒冠覆盖义齿在无牙颌修复中的应用

目的探讨以种植套筒冠覆盖义齿修复无牙颌的临床效果。方法对北京大学口腔医学院·口腔医院口腔种植中心就诊的21例无牙颌患者,采用种植套筒冠覆盖义齿修复。共28件修复体,其中上颌全颌覆盖义齿13件,下颌全颌覆盖义齿15件。共植人种植体139枚,其中Camlog 74枚,IMZ 28枚,Frialit-2 37枚。种植体修复基台切削后直接作为套筒冠内冠,套筒冠外冠分别采用金沉积技术和失蜡铸造技术加工。修复后平均追踪26．5个月(12-39个月)。以临床检查和影像学检查评价修复效果。结果至最后一次复查,21例患者临床检查未见修复体松动、折断、损坏,修复体固位好、稳定,种植体周围软组织健康。19例患者曲面断层X线片显示种植体周围骨组织稳定,无吸收。仅2例在修复3年后发现少量骨吸收,约1 mm。修复后至最后一次复查未见种植体脱落。结论种植套筒冠覆盖义齿稳定,种植体周围骨组织稳定,可用于无牙颌修复。     

Rehabilitation of the edentulous mandible with implant-supported overdenture using ball attachments and healing abutments: A case report

For many years, osseointegrated implant-supported overdentures have been used in the rehabilitation of the edentulous lower jaw with excellent results. In this report, additional implants with healing abutments were applied posterior to mental foramen on each side was used to achieve additional support to the overdenture.     

Treatment options for the edentulous mandible: clinical application of the two-implant overdenture.

Edentulism is a public health concern that affects millions of individuals. While this condition has been treated for years with implant-supported hybrid prostheses, this modality does not always represent the optimal restorative solution for all patients. The two-implant mandibular overdenture provides greater retention than does a conventional mandibular denture and, due to its cost and efficacy, can significantly improve an edentulous patient's quality of life. This article reviews the nutritional and social aspects of edentulism in affected patients and its treatment with two-implant overdentures.