同色号树脂粘接剂与试色糊剂颜色和透光率一致性的对比研究

目的 分别测定单组分光固化树脂粘接剂与同色号试色糊剂的颜色与透光率,评价其一致性,以期为临床合理选择树脂粘接剂提供依据.方法 将树脂粘接剂A(Variolink Veneer)的7种色号(HV+3、HV+2、HV+1、MVO、LV-1、LV-2、LV-3)和树脂粘接剂B(Relyx Veneer)的5种色号(A1、A3、BO.5、WO、TR)与同色号试色糊剂注入直径10 mm、厚度2 mm的白色背景模具中,表面覆盖经筛检的盖玻片,对树脂进行光固化处理,分别测量色度值并计算同色号树脂粘接剂与试色糊剂的色度差(△L*、△a*、△b*)和总色差(△E),对总色差△E进行Tukey's多重t检验.将树脂粘接剂与试色糊剂制成厚0.15 mm的薄层,测量其在380～780 μm入射条件下的透光率,计算平均透光率,对同色号树脂粘接剂和试色糊剂的平均透光率进行配对t检验.结果 Tukey's多重t检验显示,TR色号树脂粘接剂与试色糊剂颜色总色差(1.11±0.18)的评价为a,LV-1(6.38±0.45)、LV-2(5.94±0.19)、Al(7.54±0.20)、WO(4.24±1.14)为b,HV+2(10.90±0.41)、HV+1(11.48±0.17)、LV-3(10.69±0.13)、BO.5(13.26±0.21)为c,HV+3(21.94±0.21)、MV0(29.78±0.14)、A3(32.67±0.19)为d(a、b、c、d代表树脂粘接剂与试色糊剂的颜色一致性依次降低).配对t检验显示,12种色号试件中7种色号(A1、TR、HV+3、HV+2、HV+1、LV-2、LV-3)树脂粘接剂和试色糊剂的平均透光率差异有统计学意义(P＜0.01).结论 本项研究中的大部分色号树脂粘接剂与同色号试色糊剂的颜色及透光率的一致性较低,在对颜色效果要求较高的病例中应谨慎使用.

Comparison of color and translucency between resin and try-in paste with same number

Objective To test and compare the color and translucency between the mono-component light-cure adhesive resin and try-in paste with same number for porcelain veneer restorations, and evaluate the consistency of the materials. Methods Variolink Veneer and Relyx Veneer were involved in the study.The adhesive resins and try-in pastes were added into a model of diameter of 10 mm and thick of 2 mm with white background and covered with filtered cover glass, and then the resins was cured with light. The color ( L* , a* , b* ) of these samples was test and △E was also calculated to evaluate the color consistency of samples. The resins and try-in pastes were made into a thin layer of 0. 15 mm, and their translucency was tested under the light from 380 μm to 780 μm. Average translucency was calculated. Tukey t-test for multiple comparisons was used to analysis the differences of △E. Paired t-test was used to analysis the differences of translucency of them. Results Tukey's t-test shows that the evaluation of AE of TR ( 1.11 ±0. 18) was a; those of LV-1 (6. 38 ±0. 45), LV-2(5.94 ±0. 19), A1 (7. 54 ±0. 20), WO(4. 24 ± 1.14)were b; those of HV +2(10. 90 ±0. 41), HV +1(11.48 ±0. 17), LV-3( 10. 69 ±0. 13), B0. 5( 13.26 ±0. 21 ) were c; and those of HV +3(21.94 ±0. 21 ), MV0(29. 78 ±0. 14), A3(32. 67 ±0. 19) were d(a,b, c, d meaned that the consistency of resin and try-in paste became lower and lower). There were significant differences between resin and tray-in paste in 7 colors(A1, TR, HV +3, HV +2, HV +1, LV-2, LV-3) of 12 colors(P ＜ 0. 01 ). Conclusions The consistency of color and translucency between most adhesive resin and try-in paste with same number is low. This kind of materials should be used with caution in demanding cases.