Influence of implant number on the movement of mandibular implant overdentures
Influence of implant number on the movement of mandibular implant overdentures
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DOI：
10.1016/j.prosdent.2016.08.005
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发表时间：
2017-03-01
影响因子：
4.6
通讯作者：
Minakuchi, Shunsuke
中科院分区：
文献类型：
--
作者：
Oda, Ken;Kanazawa, Manabu;Minakuchi, Shunsuke
问题陈述。种植覆盖义齿的旋转运动对义齿佩戴者的咀嚼能力有负面影响。然而，植入物数量对IODs移动的影响尚未被研究。本研究的目的是在体外研究中评估下颌人工晶状体植入体的移动，不同数量的种植体，材料和方法。制作了一个含人工粘膜的无牙颌实验模型和5个实验覆盖义齿（N=5）。本研究选择了带有蓝色尼龙衬垫的定位器连接系统。准备三个种植体位置：前中线（1-IOD）、双侧侧切牙区域（2-IOD）以及前中线和双侧犬齿区域（3-IOD）。将50 N的垂直载荷施加到中前区、左尖牙区、左前磨牙区和左第一磨牙区。测量右远端边缘的垂直和水平位移以及加载点的垂直位移。使用单向方差分析和以植入物数量为因素的事后Tukey诚实显着差异检验对位移值进行统计分析。此外，采用配对t检验对覆盖义齿远中边缘的垂直位移和水平位移进行统计学比较，并采用重复测量方差分析和以加载点为因子（a=.05）的事后Tukey诚实显著性差异检验对覆盖义齿远中边缘的垂直位移进行统计学分析。前向负荷时，2-IOD右远侧边缘的垂直位移显著大于1-IOD或3-IOD（P
Statement of problem. The rotational movement of an implant overdenture (IOD) has a negative effect on the perceived masticatory ability of the denture wearer. However, the influence of implant number on the movement of IODs has not been investigated.Purpose. The purpose of this in vitro study was to evaluate the denture movement of mandibular IODs anchored by different numbers of implants.Material and methods. An edentulous mandibular test model with artificial mucosa and 5 experimental overdentures (N=5) was fabricated. The locator attachment system with blue nylon inserts was chosen for this study. Three implant positions were prepared: anterior midline (1-IOD), bilateral lateral incisor regions (2-IOD), and anterior midline and bilateral canine regions (3-IOD). Vertical loads of 50 N were applied to the mid-anterior region, the left canine region, the left premolar region, and the left first molar region. The vertical and horizontal displacements at the right distal edge and the vertical displacements at the loading point were measured. The displacement values were statistically analyzed using a 1-way analysis of variance and the post hoc Tukey honest significant difference test with the implant number as a factor. In addition, the values of the vertical and horizontal displacements at the distal edge of the overdenture were statistically compared using a paired t test, and the values of the vertical displacement at the distal edge of the overdenture were statistically analyzed by a repeated measures analysis of variance and the post hoc Tukey honest significance difference test with the loading point as a 'factor (a=.05).Results. Upon anterior loading, the 2-IOD showed significantly larger vertical displacements at the right distal edge than the 1-IOD or 3-IOD (P