Department of Paediatric Dentistry, School of Dental Medicine, University of Athens, Athens, Greece.
Lasers Med Sci. 2011 Jan;26(1):29-34. doi: 10.1007/s10103-009-0745-5. Epub 2010 Jan 23.
The aim of this study was to investigate in vitro the effects of clear or opaque sealants, on the laser fluorescence readings for occlusal caries detection in primary molars. For this reason, 427 occlusal sites in 199 teeth were clinically examined by one dentist, and their laser fluorescence (LF) was measured locally with the DIAGNOdent™ device, both before and after the teeth had been sealed with Delton Clear LC or Delton Opaque LC. For 29 of these teeth, we also measured the laser fluorescence by scanning the fissures before and after sealant application. We used Wilcoxon's signed ranks sum test and Spearman's rho correlation to compare and correlate the LF readings before and after sealing, while we used the Mann-Whitney U test to compare the two materials. Finally, we used the Kruskal-Wallis test to compare readings taken locally with those taken by the scanning technique. The results showed that there was an LF increase by a mean of 6 units after sealing with the clear material, while there was a 15 units decrease after sealing with the opaque one. LF readings before and after sealing correlated better for the clear material (rho = 0.826) than for the opaque one (rho = 0.507). LF readings were statistically significantly affected by both clear and opaque sealants (P < 0.001). However, this effect was statistically significantly less pronounced for the clear material (P < 0.001). There was also no difference between the LF readings taken by the fissure scanning technique or locally (P > 0.05). In conclusion, LF readings for occlusal caries detection in primary molars were significantly affected by both the clear and the opaque materials. However, the effect for the opaque material was more pronounced.
本研究旨在体外研究透明或不透明封闭剂对乳磨牙窝沟龋激光荧光检测读数的影响。为此，由一名牙医对 199 颗牙的 427 个窝沟临床检查，并使用 DIAGNOdentTM设备进行局部激光荧光（LF）测量，在牙齿用 Delton Clear LC 或 Delton Opaque LC 封闭前后进行。对于其中 29 颗牙，我们还在应用封闭剂前后扫描牙沟测量 LF。我们使用 Wilcoxon 符号秩和检验和 Spearman 相关系数比较和关联封闭前后 LF 读数，使用 Mann-Whitney U 检验比较两种材料。最后，我们使用 Kruskal-Wallis 检验比较局部测量和扫描技术测量的读数。结果表明，透明材料封闭后 LF 平均增加 6 个单位，不透明材料封闭后 LF 平均减少 15 个单位。透明材料封闭前后 LF 读数相关性较好（rho=0.826），不透明材料相关性较差（rho=0.507）。透明和不透明封闭剂均显著影响 LF 读数（P<0.001）。然而，透明材料的影响较小（P<0.001）。牙沟扫描技术和局部测量的 LF 读数无差异（P>0.05）。结论：透明和不透明材料均显著影响乳磨牙窝沟龋激光荧光检测读数。然而，不透明材料的影响更明显。
