CELAY全瓷桩核强度的研究

华西口腔医学杂志

CELAY全瓷桩核强度的研究

张玉幸　陆支越　王科力　邱志宏

100730 　卫生部北京医院口腔科

收稿日期:2002-02-25 修回日期:2002-02-25 出版日期:2002-02-20 发布日期:2002-02-20

Fracture Strength of Custom-fabricated Celay All-ceramic Post and Core

Zhang Yuxing , Lu Zhiyue , Wang Keli , et al

Received:2002-02-25 Revised:2002-02-25 Online:2002-02-20 Published:2002-02-20

摘要/Abstract

摘要：

　目的:比较Celay 全瓷桩核、铸造金属桩核及Parapost 预成桩复合树脂核修复的根管治疗牙全冠修复后的抗折裂强度。方法:60 个完整拔除的人上中切牙,根管治疗后随机分为5 组,每组12 个。A 组:牙体预备保留210 mm高的牙本质套圈,Celay 桩核;B 组:牙体预备无牙本质套圈,Celay 桩核;C 组:牙体预备保留210 mm 高的牙本质套圈,铸造金属桩核;D 组:牙体预备无牙本质套圈,铸造金属桩核;E 组:牙体预备保留210 mm高的牙本质套圈,Para2post 预成桩,复合树脂核。所有标本皆用Celay 全冠修复。标本在室温下保存于100 %湿度中30 d 后,在MTS 810 材料试验机上沿与牙长轴成45°的方向加载,测试折裂强度。结果:各组的折裂强度间有显著性差异( P < 0101) ,牙体预备保留210 mm高的牙本质套圈时,Celay 桩核与铸造金属桩核的折裂强度显著高于其他三组,其他三组之间无显著性差异,Celay 桩核修复时,有无210 mm高的牙本质套圈其折裂强度有显著性差异( P < 0105) 。结论:在牙体预备保留210 mm高的牙本质套圈时,Celay 桩核的强度可基本满足临床要求而不致发生桩核的折裂。

关键词: 全瓷修复体, 桩核, 根管治疗牙

Abstract:

The purpose of this study is to compare the fracture strengths of custom-fabricated Celay all-ceramic post-core , custom cast metal post-core , and prefabricated stainless steel post (Parapost) plus composite resin core with or without a 2. 0 mm dentine ferrule.Methods :A total of 60 recently extracted human maxillary central incisors were endodontically treated and divided into five groups of 12. They were given the following treatments : Group A: Celay ceramic post-core with 2. 0 mm dentine ferrule , Group B : Celay ceramic post-core with no dentine ferrule , Group C: cast metal post-core with 2. 0 mm dentine ferrule , Group D: cast metal post-core with no dentine ferrule , and Group E: prefabricated post and composite core with 2. 0 mm dentine ferrule. All specimens were stored at 100 % humidity at room temperature for 30 days before testing. Each specimen was in a special jig at a 45°angle to the long axis and subjected to a load on MTS 810 universal material testing machine until failure , with crosshead speed of 0. 02 cmPmin. Analysis of variance followed by the Newman- Keuls pairwise multiple comparison test was used to compare the results of the groups tested. Results :There was a statistically significant difference between five groups ( P < 0. 01) . Celay ceramic post-core with 2. 0 mm dentine ferrule ( 758. 35 N ±119. 26 N) and cast metal post-core with 2. 0 mm dentine ferrule (756. 63 N ±166. 22 N) had a significantly larger mean failure threshold for fracture than the other three groups which had no sig2 nificant difference between each other. There was a statistically significant difference between the fracture resistance of Celay postcore restored teeth with and without 2. 0 mm dentine ferrule.Conclusion :The custom-fabricated Celay post-core could be a choice for clinical use in endodontically treated tooth when the final restoration is an all-ceramic crown and the preparation has a 2. 0 mm dentine ferrule.

Key words: full ceramic, post and core , endodontically treated teeth

张玉幸　陆支越　王科力　邱志宏. CELAY全瓷桩核强度的研究[J]. 华西口腔医学杂志.

Zhang Yuxing,Lu Zhiyue,Wang Keli,et al. Fracture Strength of Custom-fabricated Celay All-ceramic Post and Core[J]. West China Journal of Stomatology.

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