Ren D F, Zhan K R, Chen X D, Xing W Z
Department of Prosthodontics, Dalian Stomatological Hospital, Dalian Liaoning 116021, China (Present address: Department of Pediatric Dentistry, Yantai Stomatological Hospital Affiliated to Binzhou Medical College, Yantai Shandong 264001, China).
Department of Stomatology, The NO.2 Hospital of Baoding, Baoding Hebei 071000, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2017 Feb 9;52(2):109-113. doi: 10.3760/cma.j.issn.1002-0098.2017.02.012.
To analyze the effect of ceramic materials thickness and resin cement shades on the final color of ceramic veneers in the discolored teeth, and to investigate the color agreement of try-in pastes to the corresponding resin cements. Sixty artificial maxillary central incisor teeth (C2 shade) were used to simulate the natural discolored teeth and prepared according to veneer tooth preparation protocol. Veneers of different thickness in the body region (0.50 and 0.75 mm) were fabricated using ceramic materials (LT A2 shade, IPS e.max Press). The ceramic veneer specimens were bonded to the artificial teeth using the 6 shades of resin cements (Variolink Veneer: shades of LV-3, LV-2, HV+3; RelyX™ Veneer: shades of TR, A3, WO) (5). A clinical spectrophotometer was used to measure the color parameters of ceramic veneers at the cervical, body and incisal regions. Color changes of veneers before and after cementation were calculated and registered as ΔE1, and the changes between try-in paste and the corresponding resin cements were registered as ΔE2. Three-way ANOVA indicated that ΔE1 and ΔE2 values were significantly affected by the ceramic thickness, resin cement shades and measuring regions (0.05). The ΔE1 values of six shades ranged from 0.59-8.27. The ΔE1 values were more than 2.72 when the ceramic veneers were cemented with resin cements in shades of HV+3 and WO. The ΔE2 values of six shades ranged from 0.60-2.56. The shades of HV+3, WO and A3 resin cements were more than 1.60. Different thickness of ceramic materials, resin cement shades and measuring regions could affect the final color of ceramic veneers. The color differences of some resin cements and corresponding try-in pastes might be observed in clinical practice.
分析陶瓷材料厚度和树脂水门汀颜色对变色牙陶瓷贴面最终颜色的影响，并研究试戴糊剂与相应树脂水门汀的颜色一致性。使用60颗人工上颌中切牙（C2色）模拟天然变色牙，并按照贴面牙体预备方案进行预备。使用陶瓷材料（LT A2色，IPS e.max Press）制作牙体部不同厚度（0.50和0.75 mm）的贴面。使用6种颜色的树脂水门汀（Variolink Veneer：LV-3、LV-2、HV+3色；RelyX™ Veneer：TR、A3、WO色）将陶瓷贴面标本粘结到人工牙上（5）。使用临床分光光度计测量陶瓷贴面在颈部、牙体部和切端区域的颜色参数。计算并记录粘结前后贴面的颜色变化为ΔE1，试戴糊剂与相应树脂水门汀之间的变化记录为ΔE2。三因素方差分析表明，ΔE1和ΔE2值受陶瓷厚度、树脂水门汀颜色和测量区域的显著影响（P<0.05）。6种颜色的ΔE1值范围为0.59 - 8.27。当陶瓷贴面用HV+3和WO色的树脂水门汀粘结时，ΔE1值大于2.72。6种颜色的ΔE2值范围为0.60 - 2.56。HV+3、WO和A3色树脂水门汀的ΔE2值大于1.60。不同厚度的陶瓷材料、树脂水门汀颜色和测量区域会影响陶瓷贴面的最终颜色。在临床实践中可能会观察到一些树脂水门汀与相应试戴糊剂之间的颜色差异。
