| 李菊红,阮世红,武剑,姜倩.3种高嵌体边缘适合性的比较研究[J].口腔材料器械杂志,2014,23(2):80-83. |
| 3种高嵌体边缘适合性的比较研究 |
| A Comparative Study on the Marginal Fit of Onlays by three different materials |
| 投稿时间：2013-08-15 修订日期：2013-09-03 |
| DOI：10.11752/j.kqcl.2014.02.06 |
| 中文关键词: 高嵌体 CAD/CAM 聚合瓷 钴铬瓷 适合性 |
| 英文关键词:Onlay CAD/CAM Polymer ceramic Co-Cr Porcelain Marginal fit |
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| 中文摘要: |
| 目的 研究不同材料对高嵌体边缘适合性的影响。方法 选取1颗离体上颌第一磨牙行高嵌体牙体预备,双重印模法取模,翻制30个相同尺寸的超硬石膏代型。再将这30个代型分成3组分别制作钴铬瓷高嵌体、聚合瓷高嵌体和CAD/CAM全瓷高嵌体各10个,然后用树脂加强型玻璃离子将高嵌体与石膏代型粘固。将各标本沿近远中向剖开,每个标本选择7个典型位点在体视显微镜下观察并测量高嵌体与代型之间的间隙。结果 钴铬瓷组的平均间隙值约(59.50±25.18)μm,聚合瓷组的平均间隙值约(48.06±17.58)μm,CAD/CAM全瓷组的平均间隙值约(58.37±21.28)μm,均在适合范围内。组间两两比较可见,全瓷组与钴铬瓷组间无统计学差异(P>0.05),两者均与聚合瓷组有统计学差异(P<0.05)。结论 不同材料对高嵌体适合性有影响,3种材料均能满足高嵌体适合性要求,以聚合瓷高嵌体边缘适合性最佳。 |
| 英文摘要: |
| Objective To study the influence of different materials on marginal adaptation of onlays.Methods One maxillary first molar was prepared for onlays and one negative impression was made with doubleimpression method.30 super-hard gypsum casts were fabricated from it and then divided into three groups:10 models for Co-Cr Porcelain onlays,10 models for polymer ceramic onlays and 10 models for CAD/CAM processed all-ceramic onlays.Each onlay was bonded to each plaster cast with resin-reinforced glass ionomer.The specimens were dissected along the mesial and distal surfaces of the casts.7 typical sites were chosen for every specimen,and the marginal gap between onlay margin and plaster cast was observed under a stereomicroscope.Results The mean marginal gap was respectively(59.50±25.18)μm for of Co-Cr Porcelain onlays,(48.06±17.58)μm for the Polymer ceramic onlays,and(58.37±21.28)μm for the CAD/CAM onlays.These data were within the normal range.Comparing the data from three groups by multiple comparison test,there was a statistically significant difference between each group(P=0.003<0.05).Comparing between two groups,there were no statistically significant difference between the CAD/CAM group and the Co-Cr Porcelain onlays group,while the marginal gap of these two groups were significantly different from the Polymer ceramic group.Conclusion The marginal fit of onlays varied with different materials;all three materials can meet the requirements of onlays and the Polymer ceramic onlays showed the best effect of marginal fit. |
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