不同增强型玻璃陶瓷前牙冠表面处理对承载能力的影响。

Impact of surface treatment of different reinforced glass-ceramic anterior crowns on load bearing capacity.

作者信息

Emslander Angela, Reise Michael, Eichberger Marlis, Uhrenbacher Julia, Edelhoff Daniel, Stawarczyk Bogna

机构信息

Department of Prosthodontics, Ludwig-Maximilian University.

出版信息

Dent Mater J. 2015;34(5):595-604. doi: 10.4012/dmj.2014-294.

DOI:10.4012/dmj.2014-294

PMID:26438982

Abstract

This study investigated the influence of different surface treatments on fracture load (FL) of canine crowns fabricated from two different pressable lithium-disilicate ceramics: A (HS10PC, estetic ceram, n=180) and B (IPS e.max Press, IvoclarVivadent, n=120). The standardized specimens were divided into groups of six different surface treatments and two glazing temperatures. A-group specimens were additionally assigned two glazing pastes with various thermal expansion coefficients (TEC). FL was measured and TECs were determined. Data were analyzed using three/one-way ANOVA followed by post-hoc Scheffe's test. B showed comparable or higher FL than A (B: 503-876 N; A: 375-734 N). Lithium-disilicate crowns show higher FL when not grinded but only polished or glazed. Glazing pastes affected FL depending on their TECs, firing temperature and crown treatment. TEC of A and B was 10 ppm/K, glazing pastes for A presented TECs of 7.5 ppm/K and 10 ppm/K and for B of 9 ppm/K.

摘要

本研究调查了不同表面处理对由两种不同的可压铸二硅酸锂陶瓷制成的犬牙冠折裂载荷（FL）的影响：A组（HS10PC，esthetic ceram，n = 180）和B组（IPS e.max Press，义获嘉伟瓦登特，n = 120）。将标准化试件分为六个不同表面处理组和两个上釉温度组。A组试件还被分配了两种具有不同热膨胀系数（TEC）的上釉糊剂。测量了折裂载荷并测定了热膨胀系数。数据采用三因素/单因素方差分析，随后进行事后Scheffe检验。B组的折裂载荷比A组相当或更高（B组：503 - 876 N；A组：375 - 734 N）。二硅酸锂冠在未打磨但仅抛光或上釉时显示出更高的折裂载荷。上釉糊剂根据其热膨胀系数、烧制温度和牙冠处理方式对折裂载荷有影响。A组和B组的热膨胀系数为10 ppm/K，A组的上釉糊剂热膨胀系数为7.5 ppm/K和10 ppm/K，B组的为9 ppm/K。