Maminskas Julius, Puisys Algirdas, Kuoppala Ritva, Raustia Aune, Juodzbalys Gintaras
Department of Prosthodontics, Lithuanian Universty of Health Sciences, Kaunas Lithuania.
Vilnius Implantology Center, Vilnius Lithuania.
J Oral Maxillofac Res. 2016 Sep 9;7(3):e4. doi: 10.5037/jomr.2016.7304. eCollection 2016 Jul-Sep.
To systematically review risks of mechanical impact on peri-implant strain and prosthetic influence on stability across finite element studies.
An online literature search was performed on MEDLINE and EMBASE databases published between 2011 and 2016. Following keywords tiered screening and selection of the title, abstract and full-text were performed. Studies of finite element analysis (FEA) were considered for inclusion that were written in English and revealed stress concentrations or strain at peri-implant bone level.
There were included 20 FEA studies in total. Data were organized according to the following topics: bone layers, type of bone, osseointegration level, bone level, design of implant, diameter and length of implant, implant-abutment connection, type of supra-construction, loading axis, measurement units. The stress or strain at implant-bone contact was measured over all studies and numerical values estimated. Risks of overloading were accented as non-axial loading, misfits, cantilevers and the stability of peri-implant bone was related with the usage of platform switch connection of abutment.
Peri-implant area could be affected by non-axial loading, cantilever prosthetic elements, crown/implant ratio, type of implant-abutment connection, misfits, properties of restoration materials and antagonistic tooth. The heterogeneity of finite element analysis studies limits systematization of data. Results of these studies are comparable with other findings of , , prospective and retrospective studies.
通过有限元研究系统综述机械冲击对种植体周围应变的风险以及修复体对稳定性的影响。
在MEDLINE和EMBASE数据库中对2011年至2016年发表的文献进行在线检索。按照关键词进行分层筛选，并对标题、摘要和全文进行选择。纳入的有限元分析（FEA）研究需为英文撰写，并揭示种植体周围骨水平的应力集中或应变情况。
共纳入20项有限元分析研究。数据根据以下主题进行整理：骨层、骨类型、骨结合水平、骨水平、种植体设计、种植体直径和长度、种植体-基台连接、上部结构类型、加载轴、测量单位。在所有研究中测量种植体-骨接触处的应力或应变，并估算数值。强调非轴向加载、不匹配、悬臂等过载风险，种植体周围骨的稳定性与基台平台转换连接的使用有关。
种植体周围区域可能受到非轴向加载、悬臂修复元件、冠/种植体比例、种植体-基台连接类型、不匹配、修复材料性能和对颌牙的影响。有限元分析研究的异质性限制了数据的系统化。这些研究结果与其他前瞻性和回顾性研究的结果具有可比性。
