In vitro assessment of mandibular single/two implant-retained overdentures using stress-breaking attachments.
In vitro assessment of mandibular single/two implant-retained overdentures using stress-breaking attachments.
复制标题
使用应力破坏附着体对下颌单/两个种植体固位覆盖义齿进行体外评估。
DOI：
10.1097/id.0000000000000099
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Ohkubo C
中科院分区：
文献类型：
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作者：
Kono K;Kurihara D;Suzuki Y;Ohkubo C
目的：研究应力破坏球（stress-breaking ball，SBB）附着体种植覆盖义齿的种植体周围应变和牙槽嵴压力分布。方法：在无牙颌下颌骨模拟模型上分别植入1个和2个种植体，模拟单种植体固位覆盖义齿（single-plant-retained overdentree，S-IOD）和双种植体固位覆盖义齿（two-plant-retained overdenty，T-IOD）。种植体与义齿基托的连接条件如下：义齿基托和种植体之间完全分离，使用盖螺钉作为传统全口义齿（CD），3种类型的沉降，它们之间使用SBB附着体，以及传统的球形附着体（BALL）。种植体周围的应变，在5个不同的软组织区域的压力，并与负载高达50 N的义齿基托的位移进行了测量。结果：在S-IOD和T-IOD，每个SBB附着体的应变小于应变所示的球。SBB附着体各区域的压力均小于CD和BALL所示的压力。结论：SBB附着体防止了种植体周围的应力，并提供了最佳的应力分布。1，2下颌全口义齿存在广泛的问题，包括缺乏稳定性和固位力，3异常解剖结构（即下颌圆突），神经肌肉疾病，明显的呕吐反射和严重的残留牙槽骨吸收。在过去的几十年里，骨结合种植体支持的修复体已经成为全牙列缺失患者的一种流行的修复治疗选择。5-7虽然这种疗法是首选，因为舒适和功能，它需要经济考虑和特殊照顾有关的手术和假体管理。然而，种植体固位或种植体支持的覆盖义齿（IOD）在经济学、手术和修复管理方面可能不那么重要。8、9此外，IOD在很长一段时间内表现出良好的进展，3、10、11患者满意度适当，12咀嚼功能适当。13麦吉尔14和约克15的共识报告宣布，推荐使用2个种植体的IOD作为下颌无牙患者的首选治疗方案。此外，一些临床医生16-19建议使用单个种植体的IOD可用于完全下颌无牙患者的康复。
Objective:This study investigated the strain surround implants and the pressure distribution of the alveolar ridge related to implant overdentures with stress-breaking ball (SBB) attachments.Methods:Simulation models of edentulous mandibles were embedded with 1 and 2 implants to simulate a single implant-retained overdenture (S-IOD) and a two-implant-retained overdenture (T-IOD), respectively. The implants were connected to the denture base with the following conditions: complete separation between the denture base and implant with cover screws as a conventional complete denture (CD), 3 types of settlements with an SBB attachment between them, and a conventional ball attachment (BALL). Strain surround the implant, pressure at 5 different soft tissue areas, and displacement of the denture base were measured with loading up to 50 N.Results:In S-IOD and T-IOD, the strain of each SBB attachment was less than the strain shown by the BALL. The pressure at each region of the SBB attachment was less than the pressure shown with the CD and BALL.Conclusions:SBB attachments prevented strain surround the implants in loading and provided optimal stress distribution.Complete denture (CD) rehabilitation for mandibular edentulous patients has long been applied, even though such treatment is precarious. 1, 2 Complete mandibular dentures have widely documented problems, including lack of stability and retention, 3 immoderate anomalous anatomy (ie, mandibular torus), neuromuscular disorders, a pronounced gag reflex, and severe residual ridge resorption. 4 During the past several decades, osseointegrated implant-supported prostheses have become a popular prosthodontics treatment option for the completely edentulous patient. 5–7 Although this therapy is preferred because of comfort and functionality, it requires economic consideration and special care regarding surgical and prosthetic management. However, an implant-retained or implant-supported overdenture (IOD) may be less critical regarding economics and surgical and prosthetic management. 8, 9 In addition, the IOD has shown excellent progress for a long period, 3, 10, 11 suitable patient satisfaction, 12 and appropriate masticatory function. 13 Consensus reports by McGill 14 and York 15 declared that an IOD using 2 implants was recommended as the first treatment option for mandibular edentulous patients. Furthermore, several clinicians 16–19 suggested that IODs using single implants might be used for the rehabilitation of perfectly mandibular edentulous patients.