Comparison of retention between maxillary milled and conventional denture bases: A clinical study
Comparison of retention between maxillary milled and conventional denture bases: A clinical study
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DOI：
10.1016/j.prosdent.2016.08.007
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发表时间：
2017-02-01
影响因子：
4.6
通讯作者：
Goodacre, Charles J.
中科院分区：
文献类型：
--
作者：
AlHelal, Abdulaziz;AlRumaih, Hamad S.;Goodacre, Charles J.
问题陈述。临床研究比较磨制的义齿基托与常规加工的义齿基托固位值的差异尚缺乏。本临床研究的目的是比较传统热聚合义齿基托与数字磨牙义齿基托的固位值。材料和方法。20名上颌弓完全无牙的患者参加了这项研究。扫描最终的聚氯乙烯硅氧烷印模（iSeries; Dental Wings），并将标准镶嵌语言文件发送给Global Dental Science，用于制作计算机辅助设计和计算机辅助制造（CAD-CAM）铣磨义齿基托（MB组）（AvaDent）。然后浇铸模以获得最终铸件，用于制造热聚合丙烯酸树脂义齿基托树脂（HB组）。使用定制的测试装置测量义齿固位(N)。使用先进的数字力计对每个义齿基托进行垂直拉力测试，每隔10分钟进行3次。采用重复方差分析比较两种制作方法的平均保留度（alpha= 0.05）。与传统的热聚合义齿基托相比，磨制后的义齿基托固位明显增加(P
Statement of problem. Clinical studies comparing the retention values of milled denture bases with those of conventionally processed denture bases are lacking.Purpose. The purpose of this clinical study was to compare the retention values of conventional heat-polymerized denture bases with those of digitally milled maxillary denture bases.Material and methods. Twenty individuals with completely edentulous maxillary arches participated in this study. Definitive polyvinyl siloxane impressions were scanned (iSeries; Dental Wings), and the standard tessellation language files were sent to Global Dental Science for the fabrication of a computer-aided design and computer-aided manufacturing (CAD-CAM) milled denture base (group MB) (AvaDent). The impression was then poured to obtain a definitive cast that was used to fabricate a heat-polymerized acrylic resin denture base resin (group HB). A custom-designed testing device was used to measure denture retention (N). Each denture base was subjected to a vertical pulling force by using an advanced digital force gauge 3 times at 10-minute intervals. The average retention of the 2 fabrication methods was compared using repeated ANOVA (alpha=.05).Results. Significantly increased retention was observed for the milled denture bases compared with that of the conventional heat-polymerized denture bases (P