口腔修复临床经验对比色准确性训练的影响

Effect of clinical experience on the shade matching accuracy

目的：观察口腔修复临床经验在比色准确性训练中的作用。方法：选择具备1～2年口腔修复临床经验的口腔医学生37名（A组）以及无口腔修复临床经验的121腔医学生57名（B组）。每组学生一部分使用TTB训练．其余使用TT训练。训练前首先使用Vita3D-master比色板作为比色工具．随机抽取10个比色板标准色标进行测试。然后对测试对象进行每周1次、连续3周的牙比色训练。每次训练完成后进行比色测试并计算比色准确率。采用SPSSl6．0软件包进行非参数秩和检验，比较每次测试成绩的差异及A组与B组之间每次＋JiI练后测试成绩的差异。结果：临床经验组与无临床经验组训练前比色准确率分别为（65．67＋20．48）％和（70．17＋17．57）％。经过3次训练后．比色准确率分别为（78．91＋22．82）％和（80．17＋17．77）％。2组训练前及每次训练后比色正确率差异无显著性（P〉0．01）。训练后与训练前比较，比色正确率提高，差异有统计学意义。结论：具有1～2年修复临床经验和无临床经验的口腔医学生之间．口腔修复临床经验对比色准确性无明显影响，TT/TTB系统的比色训练均能提高所有受试对象的比色准确性．

PURPOSE： To evaluate the effect of clinical experience on the shade matching accuracy. METHODS： Thirty-seven dental students （group A） who had 1 to 2 years of clinical experience and 57 dental students （group B） who didn＇t have clinical experience took part in this experiment. Participants were divided into two groups （TrB group and TY group） and used the Toothguide Training （TF） and Toothguide Training Box （TYB） respectively. All participants received training session once a week for 3 weeks. Before training and each time after finished training all participants were asked to identify ten unlabeled tabs which had been randomly chosen from Vita 3D-master shadeguide. SPSS 16.0 software package was used for Wilcoxon signed rank test. RESULTS： Before training, the accuracy rate of group A and group B was （65.67＋20.4）% and （70.17＋17.57）% respectively. After training, the accuracy rate of group A and group B was （78.91＋22.82）% and （80.17＋17.77）% respectively. No significant difference was found between group A and B, but significant difference was found between before and after training. CONCLUSIONS： This study shows clinical experience is not found to be a significant factor to the teeth shade matching. The training can improve the accuracy of shade matching.