The objective of the present research was to determine the degree of masking which occurs when 0.2 mm densely sintered aluminum oxide is placed over substrates of various colors. 20 lighter and 20 darker substrates we...The objective of the present research was to determine the degree of masking which occurs when 0.2 mm densely sintered aluminum oxide is placed over substrates of various colors. 20 lighter and 20 darker substrates were made from a mixture of dental amalgam and resin in an aluminum mold. The thin (0.2 mm) disks of densely sintered aluminum oxide were placed on the various substrates. The color changes after masking by these disks were recorded using a Minolta Chroma Meter Ⅱ. The results showed that the color (L *, a *, b *) changes after placing the disks over the substrates were obvious and lead to statistical significant differences (P<0.000 1) in ΔE, ΔL *, Δa *, Δb *. The masking ability was more pronounced with the aluminum oxide over the dark substrates than the light substrates.展开更多
目的评价氟化钠治疗烤瓷全冠牙体预备后敏感症的临床疗效。方法自身配对设计,将30例患者的96颗患牙随机分为两组,试验组用氟化钠涂擦处理,对照组用温蒸馏水安慰处理,采用可视分级评价法(visual analog scale,VAS)评价其临床疗效。结果...目的评价氟化钠治疗烤瓷全冠牙体预备后敏感症的临床疗效。方法自身配对设计,将30例患者的96颗患牙随机分为两组,试验组用氟化钠涂擦处理,对照组用温蒸馏水安慰处理,采用可视分级评价法(visual analog scale,VAS)评价其临床疗效。结果氟化钠治疗后VAS值(3.56±1.56)与治疗前(6.24±1.18)、对照组治疗后(5.86±1.45)差异均有统计学意义(P<0.05),有效率为84.67%。结论氟化钠可有效缓解活髓牙全冠预备后的牙本质过敏症。展开更多
文摘The objective of the present research was to determine the degree of masking which occurs when 0.2 mm densely sintered aluminum oxide is placed over substrates of various colors. 20 lighter and 20 darker substrates were made from a mixture of dental amalgam and resin in an aluminum mold. The thin (0.2 mm) disks of densely sintered aluminum oxide were placed on the various substrates. The color changes after masking by these disks were recorded using a Minolta Chroma Meter Ⅱ. The results showed that the color (L *, a *, b *) changes after placing the disks over the substrates were obvious and lead to statistical significant differences (P<0.000 1) in ΔE, ΔL *, Δa *, Δb *. The masking ability was more pronounced with the aluminum oxide over the dark substrates than the light substrates.
文摘目的评价氟化钠治疗烤瓷全冠牙体预备后敏感症的临床疗效。方法自身配对设计,将30例患者的96颗患牙随机分为两组,试验组用氟化钠涂擦处理,对照组用温蒸馏水安慰处理,采用可视分级评价法(visual analog scale,VAS)评价其临床疗效。结果氟化钠治疗后VAS值(3.56±1.56)与治疗前(6.24±1.18)、对照组治疗后(5.86±1.45)差异均有统计学意义(P<0.05),有效率为84.67%。结论氟化钠可有效缓解活髓牙全冠预备后的牙本质过敏症。
