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首页> 外文期刊>The Journal of Prosthetic Dentistry >The effect of seating velocity on pressure within impressions.
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The effect of seating velocity on pressure within impressions.

机译：就座速度对压痕内压力的影响。

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STATEMENT OF PROBLEM: Oral mucosa can distort under impressions. To reduce or control mucosal distortion, modern impression techniques aim to reduce or control the impression pressure. If changing seating velocity significantly changes pressure, then this effect should be considered for clinical impressions of mucosa. PURPOSE: The purpose of this study was to investigate the relationship between seating velocity and pressure generation during simulated impressions. MATERIAL AND METHODS: Vinyl polysiloxane impression material (Express) was placed between 2 approximating discs in a universal testing machine. The velocity at which the discs approximated was varied. The 7 selected seating velocities were 0.75 mm/s, 1 mm/s, 1.25 mm/s, 1.5 mm/s, 2 mm/s, 2.5 mm/s, and 3 mm/s. The pressure generated at the center of the disk was recorded. Five separate recordings were made for each velocity. One-way ANOVA and post hoc tests (Tukey B and Dunnett T3) (alpha=.05) were used to evaluate peak pressure data at each velocity. RESULTS: The mean (SD) of the recorded pressures for each velocity were 239 (6.67) KPa, 273 (14.89) KPa, 347 (11.97) KPa, 425 (19.73) KPa, 487 (17.84) KPa, 547 (21.25) KPa, and 624 (32.60) KPa, respectively. As the velocity increased, there was a significant (P<.001) concurrent increase in peak pressure. CONCLUSIONS: In this in vitro experiment, changing the velocity of seating had a significant effect on the peak pressure produced during simulated impressions.
机译：问题陈述：口腔粘膜可能在印象下变形。为了减少或控制粘膜变形，现代的压印技术旨在降低或控制压印压力。如果改变坐姿速度会显着改变压力，则应将此效果用于粘膜的临床印象。目的：这项研究的目的是调查模拟的印象期间就座速度和压力产生之间的关系。材料和方法：在通用测试机中，将乙烯基聚硅氧烷印模材料（Express）置于2个近似圆盘之间。圆盘近似的速度是变化的。选择的7种座落速度分别为0.75 mm / s，1 mm / s，1.25 mm / s，1.5 mm / s，2 mm / s，2.5 mm / s和3 mm / s。记录在磁盘中心产生的压力。为每个速度制作了五个单独的记录。单向方差分析和事后检验（Tukey B和Dunnett T3）（α= .05）用于评估每种速度下的峰值压力数据。结果：每个速度的记录压力平均值（SD）为239（6.67）KPa，273（14.89）KPa，347（11.97）KPa，425（19.73）KPa，487（17.84）KPa，547（21.25）KPa ，分别为624（32.60）KPa。随着速度的增加，峰值压力显着（P <.001）同时增加。结论：在这个体外实验中，改变座椅的速度对模拟压印过程中产生的峰值压力有显着影响。

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