Mete Jitendra J, Dange Shankar P, Khalikar Arun N, Vaidya Smita P
Department of Posthodontics, Government Dental College and Hospital, Maharashtra, India.
Eur J Esthet Dent. 2013 Summer;8(2):192-9.
As visual shade matching is subject to light source variables, this study was conducted to compare shade matching performance of dental students under two lighting conditions, ie, natural daylight and a commercially available daylight lamp.
Two sets of porcelain discs were prepared. The first set consisted of eight porcelain discs of shades A2, A3, A3.5, B2, B3, C2, C3, and D3 of the Vitapan Classical Shade Guide system. The second set consisted of three porcelain discs of shade A2, B2, and C2, having exactly similar Lab* values to those of the corresponding shade discs in the first set. Forty dental students were asked to find the closest match for the shades A2, B2, and C2 in the second set from the first set under natural daylight and daylight lamp conditions. The average ΔE between the presented and selected shade was calculated for each participant under the two lighting conditions. The significance was statistically assessed using a paired t test.
The average ΔE between presented and selected shade for individual participants under natural daylight ranged from 0 to 4.84, with a mean of 2.24, while those under daylight lamp conditions ranged from 0 to 3.68, with a mean of 1.14. The difference was statistically significant, with P < 0.0001.
Daylight lamp conditions significantly improved the shade matching performance of dental students.
由于视觉比色受光源变量影响，本研究旨在比较牙科学生在两种光照条件下的比色表现，即自然日光和市售日光灯管。
制备两组瓷片。第一组由八片维它灵经典比色板系统中A2、A3、A3.5、B2、B3、C2、C3和D3色号的瓷片组成。第二组由三片A2、B2和C2色号的瓷片组成，其Lab*值与第一组中相应色号的瓷片完全相似。40名牙科学生被要求在自然日光和日光灯管条件下，从第一组中找出与第二组中A2、B2和C2色号最匹配的瓷片。计算每位参与者在两种光照条件下所呈现色号与所选色号之间的平均色差（ΔE）。使用配对t检验进行统计学显著性评估。
在自然日光下，个体参与者所呈现色号与所选色号之间的平均ΔE范围为0至4.84，平均值为2.24；而在日光灯管条件下，该范围为0至3.68，平均值为1.14。差异具有统计学显著性，P < 0.0001。
日光灯管条件显著提高了牙科学生的比色表现。
