Visible-light curing units: Correlation between depth of cure and distance between exit window and resin surface
Visible-light curing units: Correlation between depth of cure and distance between exit window and resin surface
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DOI：
10.3109/00016359709115410
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发表时间：
1997-06-01
影响因子：
2
通讯作者：
Asmussen, E
中科院分区：
文献类型：
--
作者：
Hansen, EK;Asmussen, E
研究 I) 在先前拍摄的咬翼射线照片上测量近端空腔的深度。研究2) 通过刮擦测试，使用四种不同的固化单元和两种不同的修复树脂检查固化深度和照射距离之间的关系。研究 3) 在填充物自由表面以下 0.5 mm 处测量一种聚合树脂的显微硬度，然后在 1.0 mm 处测量？ 1.5 mml 2.0 mm，依此类推，直到树脂变得如此柔软以至于无法记录硬度。记录每个 0.5 毫米级别的硬度与照射距离的关系。 1）下前磨牙的空洞深度通常为4-5毫米，上前磨牙和下磨牙的空洞深度为5-6毫米，上磨牙的空洞深度为5-7毫米。在后者的牙齿中，15%的蛀牙深度大于或等于8毫米。 2和3)随着照射距离的增加，固化深度以线性方式适度降低。与出射窗和树脂表面的紧密接触相比，12毫米的照射距离仅使固化良好的树脂的深度减少了约1毫米。
Study I)The depth of proximal cavities was measured on previously taken bitewing radiographs. Study 2) BY means of a scrape test, the relationship between depth of cure and irradiation distance was examined with four different curing units and two different restorative resins. Study 3) The microhardness of one of the polymerized resins sas measured 0.5 mm below the free surface of the filling and then at 1.0 mm? 1.5 mml 2.0 mm, and so forth until the resin became so soft that no hardness could be recorded. The hardness at each 0.5-mm level was recorded in relation to irradiation distance. 1) The cavity depth was most often 4-5 mm in lower premolars, 5-6 mm in upper premolars and lower molars, and 5-7 mm in upper molars. In the latter teeth, 15% of the cavities were greater than or equal to 8 mm deep. 2 and 3) The depth of cure decreased moderately and in a linear manner with increasing irradiation distance. An irradiation distance of 12 mm reduced the depth of well-cured resin only hv about 1 mm as compared with close contact between exit window and surface of resin.