Porojan Liliana, Vasiliu Roxana Diana, Porojan Sorin Daniel
Department of Dental Prostheses Technology (Dental Technology), Center for Advanced Technologies in Dental Prosthodontics, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Eftimie Murgu Sq. no. 2, 300041 Timișoara, Romania.
Department of Oral Rehabilitation (Dental Technology), Center for Advanced Technologies in Dental Prosthodontics, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Eftimie Murgu Sq. no. 2, 300041 Timișoara, Romania.
Polymers (Basel). 2022 Jan 18;14(3):364. doi: 10.3390/polym14030364.
An outstanding treatment challenge related to aesthetic monolithic materials is to mask discolored substrates in aesthetic areas. The purpose of the study is to evaluate the substrate masking ability of different resin composite materials and the influence of their association with luting agents and substrates. Five types of 2M2 HT (high translucency) resin composite materials were selected: Vita Enamic [E] and four types of nanoparticle-filled composites Lava Ultimate [L], Cerasmart [C], Shofu HC [S], and Hyramic [H]. Resin composite Vita VM LC with different shades was used for the substrates: 2M2, 3M2, and CP2. Variolink Esthetic Try-inpastes neutral, light+, and warm+ colors were chosen to simulate the luting agent color. Optical parameters (TP (translucency), CR (contrast ratio), and OP (opalesce)) and color differences ΔE (chromatic difference) were calculated. Statistical analyses were performed to evaluate the comparisons between the groups and establish correlations. TP average values for all materials were in the range of 21.49-24.53. OP average values were in the rage of 6.31-7.85. OP is moderate positive correlated to TP and CR is negative and strong correlated to TP. Related to materials, average color changes decrease as following: E > H > C > L > S. Referring to the tryin material, warm colors induce marked color changes of the restoration. The differences of the color changes determined by all studied substrates are significant. For the final aesthetic aspect of the restoration, it is essential to consider the underlying dental structure, luting agent, and restoration material as a whole unit. The masking ability of the investigated resin matrix ceramic materials materials shows differences, the best behavior demonstrated Shofu HC and Lava Ultimate. Marked color changes are related to high chroma substrates. For substrates with a darker color, the association with warm try-in pastes lead to marked color changes, but with neutral and light try-in pastes at most perceivable.
与美学整体材料相关的一个突出治疗挑战是掩盖美学区域中变色的基底。本研究的目的是评估不同树脂复合材料的基底掩盖能力及其与粘结剂和基底结合的影响。选择了五种类型的2M2 HT（高透明度）树脂复合材料：Vita Enamic [E]和四种纳米颗粒填充复合材料Lava Ultimate [L]、Cerasmart [C]、松风HC [S]和Hyramic [H]。使用不同色度的树脂复合材料Vita VM LC作为基底：2M2、3M2和CP2。选择Variolink Esthetic试戴糊剂的中性、亮+和暖+颜色来模拟粘结剂颜色。计算光学参数（TP（透明度）、CR（对比度）和OP（乳光））以及色差ΔE（色度差）。进行统计分析以评估组间比较并建立相关性。所有材料的TP平均值在21.49 - 24.53范围内。OP平均值在6.31 - 7.85范围内。OP与TP呈中度正相关，CR与TP呈负且强相关。与材料相关，平均颜色变化按以下顺序降低：E > H > C > L > S。对于试戴材料，暖色调会引起修复体明显的颜色变化。所有研究基底所确定的颜色变化差异显著。对于修复体的最终美学效果，将底层牙体结构、粘结剂和修复材料作为一个整体单元来考虑至关重要。所研究的树脂基陶瓷材料的掩盖能力存在差异，松风HC和Lava Ultimate表现最佳。明显的颜色变化与高色度基底有关。对于颜色较深的基底，与暖色调试戴糊剂结合会导致明显的颜色变化，但与中性和亮色调试戴糊剂结合时颜色变化最明显。
