摘要
背景:选择合适的陶瓷材料对口腔全瓷美学修复尤为重要。在口腔修复体美学性能研究中,多使用色差值和透光性作为评价指标,影响全瓷修复体色差和透光性的因素主要有陶瓷材料的种类、色调、厚度、加工工艺以及基牙颜色和粘接剂等。目的:探究材料种类及厚度对全瓷修复体美学性能的影响。方法:选取各类可切削陶瓷中6种代表性的材料(常规氧化锆ZR-ST、树脂基陶瓷RC、高透氧化锆ZR-TT、白榴石增强玻璃陶瓷LE、二硅酸锂玻璃陶瓷LD及长石质瓷FP),每种材料分别制备成0.8,1.0,1.5 mm厚的10.0 mm×12.5 mm长方体陶瓷试件,进行对应的表面处理后与树脂试件(代表基牙)粘接制成陶瓷-树脂复合体试件,测算粘接前后的CIEL^(*)a^(*)b^(*)、色差值ΔE及透光率值。结果与结论:①当基牙厚度未达到无限光学厚度时,陶瓷材料的种类和厚度共同影响修复体的颜色和透光率值。当陶瓷试件厚度不超过1.0 mm时,与树脂片粘接后的颜色普遍向蓝红趋近;当陶瓷试件厚度为1.5 mm时,与树脂片粘接后的颜色普遍向蓝绿趋近,提示在全瓷修复体比色时可通过颜色预补偿优化美学匹配。②除厚度1.5 mm ZR-ST陶瓷试件外,粘接后各组陶瓷试件与树脂片之间的色差值ΔE均低于5,0.8 mm ZR-ST陶瓷试件与树脂片之间的色差值ΔE接近3,1.0 mm ZR-TT陶瓷试件与树脂片之间的色差值ΔE小于3,提示在微创修复过程中,若患牙透光率不高且美学修复空间不足、对材料强度要求高时,ZR-TT和ZR-ST陶瓷可能是潜在的选择。③陶瓷试件的透光率值在粘接后降低,并随陶瓷厚度的增加显著降低。RC陶瓷试件的透光率值高,粘接后与树脂片之间的色差值ΔE接近3,光学性能出色。
BACKGROUND:The selection of appropriate ceramic material is crucial for esthetic all-ceramic restorations.In studies of the esthetic performance of dental restorations,color difference and light transmittance are often used as evaluation indicators.Factors influencing the color difference and light transmittance of all-ceramic restorations primarily include the type of ceramic material,hue,thickness,processing technique,abutment color,and adhesive.OBJECTIVE:To investigate the impact of material type and thickness on the esthetic performance of all-ceramic restorations.METHODS:Six representative machinable ceramic materials(conventional zirconia ZR-ST,resin-based ceramic RC,high-transmittance zirconia ZR-TT,leucite-reinforced glass-ceramic LE,lithium disilicate glass-ceramic LD,and feldspathic ceramic FP)were selected.Rectangular ceramic specimens(10.0 mm×12.5 mm)with thicknesses of 0.8,1.0,and 1.5 mm were prepared from each material.After corresponding surface treatments,the specimens were bonded to resin specimens(representing abutments)to create ceramic-resin composite specimens.CIE L^(*)a^(*)b^(*)values,color differenceΔE,and light transmittance were measured before and after bonding.RESULTS AND CONCLUSION:(1)When the abutment thickness does not reach infinite optical thickness,the type and thickness of ceramic material jointly influence the color and transmittance of the restoration.When the ceramic specimen thickness does not exceed 1.0 mm,the color after bonding to the resin sheet generally approaches blue-red.When the ceramic specimen thickness is 1.5 mm,the color after bonding to the resin sheet generally approaches blue-green,suggesting that color pre-compensation can be used to optimize esthetic matching when comparing all-ceramic restorations.(2)With the exception of the 1.5 mm thick ZR-ST ceramic,the color differenceΔE between the ceramic specimens and the resin sheet after bonding in all groups was less than 5.The color differenceΔE between the 0.8 mm ZR-ST ceramic specimen and the resin sheet was close to 3,and the color differenceΔE between the 1.0 mm ZR-TT ceramic specimen and the resin sheet was less than 3.This suggests that ZR-TT and ZR-ST ceramics may be potential options for minimally invasive restorations when the light transmittance of the affected tooth is low,the esthetic restoration space is limited,and high material strength is required.(3)The light transmittance of the ceramic specimen decreased after bonding and diminished significantly with increasing ceramic thickness.The RC ceramic specimen had a high light transmittance,and the color differenceΔE between the specimen and the resin sheet after bonding was close to 3,indicating excellent optical performance.
作者
王秋月
付宏宇
田月明
冯驭驰
Wang Qiuyue;Fu Hongyu;Tian Yueming;Feng Yuchi(Department of Stomatology,Peking University First Hospital,Beijing 100034,China;Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)
出处
《中国组织工程研究》
北大核心
2026年第20期5125-5133,共9页
Chinese Journal of Tissue Engineering Research
关键词
口腔美学修复
全瓷材料
美学性能
色差
透光性
微创修复技术
CIEL^(*)a^(*)b^(*)
颜色补偿
esthetic dental restoration
ceramic material
esthetic performance
color difference
transmittance
minimally invasive prosthodontic procedure
CIE L^(*)a^(*)b^(*)
color compensation
