Department of Second Dental Center, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China.
Department of Second Dental Center, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China,
Am J Dent. 2024 Jun;37(3):164-168.
To investigate the effect of different abutments and crowns on the color of implant-supported restorations.
Zirconia and lithium disilicate (e.max) disks with A2 shade were fabricated to represent two crowns. The implant abutments were untreated titanium, opaqued titanium, anodized titanium, A2 shade zirconia and white zirconia. 4.0 mm-thickness zirconia and e.max specimens were used as references respectively. The crowns were placed on tested abutments with a drop of clear glycerin between them and the color was measured using a digital spectrophotometer. CIELab values were recorded to evaluate color differences (ΔE) between tested specimens and the references.
Titanium abutments presented higher color differences than zirconia. The ΔE values with untreated titanium were higher than those with opaqued titanium. No differences were found between untreated titanium and anodized titanium for zirconia crowns. The ΔE values of zirconia crowns showed no significant differences between shade A2 zirconia and white zirconia abutments; e.max crowns showed a significant difference. The zirconia crown ΔE values were lower than those of e.max for all titanium and A2 zirconia abutments. Lithium disilicate crowns and zirconia abutments may be more suitable for implant-supported restorations. Opaqued titanium abutment may improve color in esthetic regions when a ceramic abutment cannot be used.
Lithium disilicate crowns and zirconia abutments may be an effective method to achieve excellent color matching in esthetic regions with implant-supported restorations.
研究不同基台和冠对种植体支持修复体颜色的影响。
制作了 A2 色氧化锆和锂硅二酸盐（e.max）圆盘来代表两种冠。种植体基台分别为未经处理的钛、不透光钛、阳极氧化钛、A2 色氧化锆和白色氧化锆。分别使用 4.0 毫米厚的氧化锆和 e.max 标本作为参考。将冠放置在测试基台上，两者之间滴一滴透明甘油，然后使用数字分光光度计测量颜色。记录 CIELab 值以评估测试样本与参考样本之间的颜色差异（ΔE）。
钛基台的颜色差异大于氧化锆。未经处理的钛基台的 ΔE 值高于不透光钛基台。对于氧化锆冠，未经处理的钛基台和阳极氧化钛基台之间没有差异。A2 色氧化锆基台和白色氧化锆基台的氧化锆冠的 ΔE 值没有显著差异；e.max 冠有显著差异。对于所有钛基台和 A2 色氧化锆基台，氧化锆冠的 ΔE 值均低于 e.max 冠。氧化锆冠和氧化锆基台可能更适合用于种植体支持修复体。在美学区域，如果不能使用陶瓷基台，不透光钛基台可能会改善颜色。
氧化硅二酸盐冠和氧化锆基台可能是在种植体支持修复的美学区域实现出色颜色匹配的有效方法。
