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首页> 外文期刊>The Journal of Prosthetic Dentistry >Qualitative and quantitative determination of dental amalgam restoration volume.
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Qualitative and quantitative determination of dental amalgam restoration volume.

机译：定性和定量确定牙科用汞合金的修复量。

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STATEMENT OF PROBLEM: Volume of tooth structure replaced by an existing restoration, as assessed by visual and radiographic examination, is one diagnostic measure used by dental practitioners and dental insurance agencies to determine the relative need to restore a tooth with a full-coverage cast restoration. However, use of these methods has not been validated. PURPOSE: This study compared the volume of a range of dental amalgam restorations placed in typodont teeth, as estimated by dentists, dental students and laypersons, with the actual volume of each restoration. METHODS AND MATERIAL: Sixty subjects (20 dental school faculty, 20 dental students, and 20 clerical staff [laypersons]) participated. After reviewing photographic images of typodont teeth with mesial-occlusal-distal dental amalgam restorations, subjects estimated the volume of each restoration using various restorations on different teeth as a percentage of its tooth's coronal volume. The actual volume of each dental amalgam restoration and that of the coronal portion of the prepared teeth was calculated with a volumetric displacement technique. The single sample 2-sided t test with a.05 level of significance was used to evaluate the null hypothesis (H0 ): The survey participant's estimates of each restoration's percentage volume are the same as the measured volume values versus the alternative hypothesis (H1 ): estimates differed from the measured volume values. One-way analysis of variance was used to determine the significance of any difference between the estimates of the 3 survey test groups. RESULTS: Average volumes reported by all 3 groups were significantly different than the measured volume values (P <.05). Experience and dental training did not significantly affect a participant's ability to evaluate restoration volumes with greater accuracy. Results reported by dentists, dental students, and laypersons were not significantly different (P >.05). CONCLUSIONS: The volume of a restoration is inaccurately assessed by visual and radiographic examination.
机译：问题陈述：通过视觉和射线照相检查评估，由现有修复物替代的牙齿结构的体积是牙科医生和牙科保险机构用来确定使用全覆盖铸造修复物修复牙齿的相对需求的一种诊断措施。 。但是，这些方法的使用尚未得到验证。目的：本研究比较了牙医，牙科学生和非专业人士估计的，在牙突牙齿上放置的一系列汞齐牙齿修复体的体积与每个修复体的实际体积。方法和材料：60名受试者（20名牙科学校教员，20名牙科学生和20名文书人员[外行]）参加了会议。在回顾了具有中颌-远侧牙齿汞齐修复体的牙突牙齿的摄影图像后，受试者评估了在不同牙齿上使用各种修复体的每个修复体的体积（占其牙齿冠状体体积的百分比）。用体积置换技术计算每个牙齿汞齐修复体的实际体积和准备牙齿的冠状部分的实际体积。显着性水平为a.05的单样本2面t检验用于评估原假设（H0）：调查参与者对每个修复体百分比体积的估计与测得的体积值相对于替代假设（H1）相同。 ：估算值与测量的体积值不同。使用单向方差分析来确定3个调查测试组的估计之间任何差异的显着性。结果：所有三个组报告的平均体积与实测体积值显着不同（P <.05）。经验和牙科培训并没有显着影响参与者更准确地评估修复体的能力。牙医，牙科学生和非专业人士报告的结果没有显着差异（P> .05）。结论：通过视觉和射线照相检查不准确地评估了修复体的体积。

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