Tooth stiffness with composite veneers: a strain gauge and finite element evaluation.
Tooth stiffness with composite veneers: a strain gauge and finite element evaluation.
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复合材料贴面的牙齿刚度：应变计和有限元评估。
DOI：
10.1016/0109-5641(94)90069-8
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Ross,GK
中科院分区：
文献类型：
--
作者：
Reeh,ES;Ross,GK
目标.本研究旨在确定复合贴面手术对切牙功能特性的影响。10个提取的人上颌中切牙成对安装在尼龙环中。一个应变计沿着每个牙齿的长轴粘结在舌面的中心。每一对形成惠斯通电桥电路的一半，并连接到消除所有，但从实验应用程序产生的电压。在舌面切缘附近对牙齿施加50 N的斜坡载荷。对未改变的牙齿、具有制备物的牙齿和修复的牙齿进行加载。生成二维有限元（FE）模型，以评估每个测试条件。相对刚度，与未改变的牙齿相比，从测量与应变计步骤和有限元模型计算。结果。相对刚度值为1表示刚度恢复到未改变牙齿的水平。这两种方法的评价表明，随着牙齿结构的每次后续减少，平均相对刚度降低。复合材料修复体的平均相对刚度比相应的准备增加，但从未达到未改变牙齿的水平。在所有程序中，二维有限元模型在方向和幅度上与实验应变片方法相关性良好（R = 0.83）。树脂复合贴面不能将硬度恢复到未改变牙齿的水平。
Objectives. This study was conducted to determine the impact of composite veneer procedures on the functional properties of incisors.Methods. Ten extracted human maxillary central incisors were mounted in pairs in a nylon ring. One strain gauge was bonded along the long axis of each tooth on the center of the lingual surface. Each pair formed half of a Wheatstone bridge circuit and was wired to eliminate all but the voltage resulting from experimentally applied procedures. The teeth were ramp-loaded to 50 N near the incisal edge on the lingual surface. Loading was performed on the unaltered teeth, teeth with preparations and restored teeth. Two-dimensional finite element (FE) models were generated to evaluate each test condition. Relative stiffness, compared with the unaltered tooth, was calculated from measurements with the strain gauge steps and from the FE models.Results. A relative stiffness value of unity represents recovery of stiffness to the level of the unaltered tooth. Both methods of evaluation demonstrated a decrease in mean relative stiffness with each subsequent reduction in tooth structure. The composite restoration increased its mean relative stiffness compared to its corresponding preparation but never to the level of the unaltered tooth. Across all procedures, the two-dimensional FE model correlated well in both direction and magnitude with the experimental strain gauge method (R = 0.83).Significance. A resin composite veneer does not restore the stiffness to the level of an unaltered tooth.
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牙齿的生物物理学。
DOI：
--
发表时间：
1976
期刊：
Frontiers of oral physiology
影响因子：
--
作者：
M. Braden
通讯作者：
M. Braden
复合材料结构对其弹性响应的影响
影响因子：
7.6
作者：
M. Braem;Paul Lambrechts;V. Doren;G. Vanherle
通讯作者：
G. Vanherle
影响因子：
7.6
作者：
S. H. Crandall;N. C. Dahl;E. Dill
通讯作者：
E. Dill
影响因子：
7.6
作者：
MORIN, D;DELONG, R;DOUGLAS, WH
通讯作者：
DOUGLAS, WH
修复牙齿的生物物理应力分析：建模和分析。
影响因子：
5
作者：
D. Morin;Mark Cross;V. Voller;William H. Douglas;R. DeLong
通讯作者：
R. DeLong