Effect of die spacers on precementation space of complete-coverage restorations.
Effect of die spacers on precementation space of complete-coverage restorations.
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模具垫片对全覆盖修复体预固结空间的影响。
DOI：
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发表时间：
1997
影响因子：
2.3
通讯作者：
G. Goldstein
中科院分区：
文献类型：
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作者：
S. Emtiaz;G. Goldstein
作者测量了不同层模具垫片在体内实现的骨水泥前间隙。在纽约纽约的纽约大学牙科学院的修复学高级教育项目中制造了291个铸件。四个临床医生组中的每一组均将一层Taub模具硬化剂和一至四层模具垫片涂敷到模具精整线的0.5至1.0 mm范围内。所得铸件使用GC Fit-Rank进行调整。在铸件最终就位后，取出Fit-Round，沿颊舌侧切片，并使用千分尺在三个位置（咬合中、中轴和斜面上）测量，共获得657个读数。仅在数据收集后，才按组识别标本。方差分析表明，组和位置的意义。事后单因素方差分析和Sheffe检验（P < .1）表明：（1）一层或两层模具垫片比三层或四层模具垫片表现出更小的前牙骨质间隙;（2）中咬合前牙骨质间隙大于中轴前牙骨质间隙;（3）在未使用模具垫片的斜面区域，测量到最一致和最小的前牙骨质间隙。
The authors measured the precementation space achieved in vivo with varying layers of die spacer. Two hundred and ninety-one castings were fabricated in the Advanced Education Program in Prosthodontics at New York University College of Dentistry, New York, New York. Each of four clinician groups applied one layer of Taub Die Hardener and from one to four layers of die spacer to within 0.5 to 1.0 mm of the dies' finishing line. The resultant castings were adjusted using GC Fit-Checker. After final seating of the casting, the Fit-Checker was removed, sectioned buccolingually, and measured using a micrometer at three locations (midocclusally, midaxially, and on the bevel) for a total of 657 readings. Only after data collection were the specimens identified by group. Analysis of variance demonstrated a significance for group and location. Post hoc one-way analysis of variance and Sheffe tests (P < .1) demonstrated that: (1) one or two layers of die spacer demonstrated smaller precementation spaces than three or four layers; (2) the midocclusal precementation space was greater than the midaxial precementation space; (3) on the bevel area where no die spacer was used, the most consistent and minimal precementation space was measured.