不同陶瓷材料、边缘线及粘结剂的全瓷冠垂直边缘差异：一项体外评估

Vertical marginal discrepancy of ceramic copings with different ceramic materials, finish lines, and luting agents: an in vitro evaluation.

作者信息

Quintas Adriana Ferreira, Oliveira Fabiano, Bottino Marco Antonio

机构信息

University of São Paulo, Brazil.

出版信息

J Prosthet Dent. 2004 Sep;92(3):250-7. doi: 10.1016/j.prosdent.2004.06.023.

DOI:10.1016/j.prosdent.2004.06.023

PMID:15343160

Abstract

STATEMENT OF PROBLEM

Prosthetic restorations that fit poorly may affect periodontal health and occlusion. Studies that have evaluated the accuracy of fit of ceramic restorations before and after cementation assessed primarily intracoronal restorations.

PURPOSE

This in vitro study evaluated the effect of different finish lines, ceramic manufacturing techniques, and luting agents on the vertical discrepancy of ceramic copings.

MATERIAL AND METHODS

Two stainless steel molars were prepared for complete crowns with 2 different finish lines (heavy chamfer and rounded shoulder); each molar was duplicated to fabricate 90 copings. A total of 180 copings generated 18 groups (n=10 for each finish line-coping material-luting agent combination). Luting agents tested included zinc phosphate, resin-modified glass ionomer (Fuji Plus), and resin composite cements (Panavia F). A metal frame was developed on which to screw the stainless steel model and a ceramic coping; the distance (microm) between 2 predetermined points was measured before and after cementation by a profile projector under a torquing force. A 4-way ANOVA with repeated measurements was performed to assess the influence of each factor in the vertical marginal discrepancy: 3 between-coping factors (finish line-coping material-luting agent) and 1 within-coping factor (before and after cementation) (alpha=.05).

RESULTS

Procera copings presented the lowest mean values ( P <.05) of vertical marginal discrepancy before and after cementation (25/44 microm) when compared to Empress 2 (68/110 microm) and InCeram Alumina copings (57/117 microm), regardless of any combinations among all finish lines and luting agents tested.

CONCLUSION

Considering each factor separately, the ceramic manufacturing technique appeared to be the most important factor tested for the definitive vertical discrepancy of all-ceramic copings, with lower mean values for Procera copings.

摘要

问题陈述

修复效果不佳的修复体可能会影响牙周健康和咬合。之前评估粘结前后陶瓷修复体适合度准确性的研究主要针对冠内修复体。

目的

本体外研究评估了不同边缘线、陶瓷制作技术和粘结剂对陶瓷基底冠垂直差异的影响。

材料与方法

为两颗不锈钢磨牙制备全冠，设置两种不同的边缘线（粗面肩台和圆钝肩台）；每颗磨牙复制制作90个基底冠。总共180个基底冠形成18组（每种边缘线 - 基底冠材料 - 粘结剂组合n = 10）。测试的粘结剂包括磷酸锌、树脂改性玻璃离子水门汀（富士Ⅱ型）和树脂复合树脂水门汀（帕纳维亚F）。制作了一个金属框架，用于将不锈钢模型和陶瓷基底冠拧在一起；在施加扭矩力的情况下，通过轮廓投影仪在粘结前后测量两个预定点之间的距离（微米）。采用重复测量的四因素方差分析来评估每个因素对垂直边缘差异的影响：3个基底冠间因素（边缘线 - 基底冠材料 - 粘结剂）和1个基底冠内因素（粘结前后）（α = 0.05）。