| 反3/4冠抗切向脱位力的实验研究 |
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| 引用本文： | 丁农乐,杨正.反3/4冠抗切向脱位力的实验研究[J].泸州医学院学报,2008,31(3):279-281. |
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| 作者姓名： | 丁农乐 杨正 |
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| 作者单位： | 泸州医学院附属口腔医院修复科,四川泸州,646000 |
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| 摘 要： | 目的:通过测量并比较金属3/4冠与金属烤瓷反3/4冠修复离体上颌中切牙抗切向脱位力的差异,论证金属烤瓷反3/4冠的抗切向脱位力能否满足临床固位要求.方法:选择20颗牙冠完整的离体上颌中切牙行牙体预备,制作金属3/4冠并就位于对应离体牙上,用万能试验机测量并统计各个样本的切向脱位力.再对20颗离体上颌中切牙行牙体预备,制作金属烤瓷反3/4冠金属底冠并就位于对应离体牙上,用万能试验机测量并统计各个样本的切向脱位力.用SPSS14.0统计软件包对测量结果进行配对T检验(parired-samples T Test).结果:①金属3/4冠的切向脱位力为0.545±0.487N.②金属烤瓷反3/4冠金属底冠的切向脱位力为2.96±1.58N.③金属3/4冠的抗切向脱位力和金属烤瓷反3/4冠金属底冠的切向脱位力差异有显著统计学意义(P<0.01).后者抗切向脱位力大于前者.结论:金属烤瓷反3/4冠修复离体上颌中切牙,其抗切向脱位力能够满足临床要求.
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| 关 键 词： | 上颌中切牙 金属烤瓷反3/4冠 抗切向脱住力 |
INCISAL DISLOCATION STRENGTH OF ANTERIOR TEETH RESTORED WITH METAL-CERAMIC REVERSE THREE-QUARTER CROWNS: AN IN VITRO STUDY |
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| Ding Nongle,et al.INCISAL DISLOCATION STRENGTH OF ANTERIOR TEETH RESTORED WITH METAL-CERAMIC REVERSE THREE-QUARTER CROWNS: AN IN VITRO STUDY[J].Journal of Luzhou Medical College,2008,31(3):279-281. |
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| Authors: | Ding Nongle |
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| Affiliation: | Ding Nongle,et al Department of Prosthodontics,the Dental Hospital of Luzhou medical college |
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| Abstract: | Objective: To investigate the incisal dislocation strength of maxillary central incisors restored with metal-ceramic reverse three-quarter crowns. Methods: Twenty noncarious human maxillary central incisors were prepared for three-quarter crowns. Three-quarter crowns were fabricated according to laboratory procedure. All restorations were placed to abutments respectively.Tensile strength was tested with a universal testing machine at crosshead speed of 2mm per minute paralleling the long axis of the tooth. ... |
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| Keywords: | Maxillary central incisors Metal-ceramic reverse three-quarter crowns Dislocation strength |
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