构成渐变多层的疲劳性能和故障负载:部分覆盖恢复与不同厚度的单冠相比
F A Spitznagel1, A Marksteiner1, L S Prott1,2
1Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
概括
复合梯度多层石复原显示出高耐疲劳性. 超薄部分覆盖恢复 (PCR) 的故障负载比冠状更高,而这两种类型在更大的厚度下都是可行的.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 恢复性牙科 恢复性牙科
背景情况:
- 单质石修复在牙科中越来越多地使用.
- 了解不同的配方和设计的机械行为对于临床成功至关重要.
- 构成梯度多层石在机械性能方面提供了潜在的优势.
研究的目的:
- 为了评估单立体组合梯度多层石复原的耐疲劳性和故障负载.
- 为了比较恢复类型 (部分覆盖与皇冠) 和陶厚度对机械性能的影响.
- 评估这些恢复的适合性临床应用.
主要方法:
- 测试了72个CAD/CAM制造的体修复.
- 修复按类型 (部分覆盖修复[PCR]或皇冠[C]) 和陶厚度 (0.5,1.0或1.5毫米) 分类.
- 标本经历了热力学疲劳,随后进行单次负载到故障测试.
主要成果:
- 所有标本都在疲劳中幸存下来,总体成功率为97.22%.
- 超薄 (0.5毫米) 的PCR显示出明显更高的故障负载,而不是超薄的皇冠.
- 在1.5毫米厚度时,冠状显示出比PCR更高的故障负载,而在1.0毫米厚度时没有发现显著差异.
结论:
- 超薄 (0.5毫米) 部分覆盖的石修复显示出与皇冠相比更高的故障负载.
- 部分覆盖恢复和皇冠在1.0毫米和1.5毫米厚度下均具有机械可行性.
- 构成梯度多层合金适用于最少侵入性的PCR骨修复,建议单个皇冠的最低厚度为1.0毫米.
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