Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-Machi, Sendai, Miyagi, 980-8575, Japan.
Dental Technical Training School attached to Nihon University School of Dentistry, Tokyo, Japan.
Int J Implant Dent. 2023 Sep 19;9(1):31. doi: 10.1186/s40729-023-00500-3.
Appropriate load distribution among the supporting elements is essential for the long-term success of implant-assisted removable partial dentures; however, there is little information available on load distribution.
This study aimed to evaluate the effect of implant location on load distribution in implant-assisted removable partial dentures by reviewing in vitro models and finite-element analysis studies.
English-language studies which examined the load distribution of implant-assisted removable partial dentures and were published between January 2001 and October 2022 were extracted from PubMed, ScienceDirect, and Scopus online databases, and manual searching. Two reviewers selected the articles based on the predetermined inclusion and exclusion criteria, followed by data extraction and analysis.
Forty-seven studies were selected after evaluating the titles and abstracts of 264 articles; two were identified manually. After screening the text, 12 studies were included: six in vitro model experiments and six finite-element analysis studies. All included studies used a mandibular free-end missing model (Kennedy Class I or II). The influence of implant location on load distribution to the abutment tooth, implant, and mucosa under the denture base was summarized in three cases: implant at the premolar, first molar, and second molar region. Due to differences in the measurement method of load distribution and loading condition to the denture, the results differed among the studies.
The implant location in implant-assisted removable partial dentures can affect load distribution to the supporting elements, such as the abutment tooth, implant, and mucosa under the denture base.
适当分配支撑元素的负荷对于种植体支持可摘局部义齿的长期成功至关重要；然而，关于负荷分布的信息很少。
本研究旨在通过回顾体外模型和有限元分析研究，评估种植体位置对种植体支持可摘局部义齿负荷分布的影响。
从 PubMed、ScienceDirect 和 Scopus 在线数据库以及手动搜索中提取了 2001 年 1 月至 2022 年 10 月发表的、检查种植体支持可摘局部义齿负荷分布的英文研究，并进行了评估。两名审查员根据预定的纳入和排除标准选择文章，然后进行数据提取和分析。
在评估了 264 篇文章的标题和摘要后，选择了 47 篇文章；另外手动识别了 2 篇文章。经过文本筛选，共纳入 12 项研究：6 项体外模型实验和 6 项有限元分析研究。所有纳入的研究都使用下颌游离端缺失模型（Kennedy 分类 I 或 II）。总结了种植体位置对基牙、种植体和义齿基底下黏膜的负荷分布的影响，共分为三种情况：前磨牙、第一磨牙和第二磨牙区的种植体。由于负荷分布的测量方法和义齿加载条件的差异，研究结果也有所不同。
种植体支持可摘局部义齿中的种植体位置会影响基牙、种植体和义齿基底下黏膜等支撑元素的负荷分布。
