الفهرس 
Implant stability occur at two different stagesOnly 14 pages are availabe for public view
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Abstract
Dental implants have become a predictable treatment option for restoring missing teeth. The purpose of tooth replacement with implants is to restore adequate function and esthetics without affecting adjacent hard and/or soft tissue structures. The use of dental implants in oral rehabilitation has currently been increasing since clinical studies with dental implant treatment have revealed successful outcomes (4). The advent of osseointegrated implants provides a treatment modality that allows the remaining maxillary teeth to be kept and maintains the level of alveolar bone in the edentulous mandible (5).Implant overdenture provides enhanced retention and stability compared to the conventional denture. The support is gained from both the intraoral tissues and dental implants. The connection should minimize denture movement without increasing the stress on the implants. Attachment systems are easy to use and many are currently available (6, 7). When selecting an attachment system, the clinician should consider guidelines regarding their long- term outcomes. Early clinical studies focused on the implant survival, but recent studies have considered prosthetic maintenance (i.e., adaption and repair capabilities) and have compared retention devices. Although some debate exists regarding the retention durability of attachments, technical aspects are now considered to be part of the process of choosing an appropriate attachment (8, 9).