CAJ | 학술논문

目的：评估金铂合金基核表面不同全瓷冠各部位的色度学参数及其与目标色片色差。方法???按照全瓷冠基牙预备体要求制作金铂合金基核，分别戴入Procera氧化铝、Procera氧化锆、Lava氧化锆、IPS?E.max高度不透明压铸陶瓷底冠，分光光度仪分别在底冠的颈1/3、体1/3、切1/3随机取点测色。4种底冠烧结体瓷后戴入金铂基核，分光光度仪测色，以Vitapan比色板A2体瓷色片为对照，对数据进行比较。结果4组底冠均提高基核的L*值，高于A2；a*值明显下降，低于A2；b*值较基核正负方向变化不一致。烧结体瓷后，各组L*值均下降，且低于A2。a*值和b*值均明显呈红黄色轴方向上升，各组a*值低于A2；b*值与A2接近，与A2色差减小。结论?4组全瓷冠对金属基核都有较好遮色性，但各组冠明度略低于对照A2，彩度偏绿，色差在临床可接受范围；但人眼可分辨，仍需进一步减小色差，提高颜色匹配度。
목적：평고금박합금기핵표면불동전자관각부위적색도학삼수급기여목표색편색차。방법???안조전자관기아예비체요구제작금박합금기핵，분별대입Procera양화려、Procera양화고、Lava양화고、IPS?E.max고도불투명압주도자저관，분광광도의분별재저관적경1/3、체1/3、절1/3수궤취점측색。4충저관소결체자후대입금박기핵，분광광도의측색，이Vitapan비색판A2체자색편위대조，대수거진행비교。결과4조저관균제고기핵적L*치，고우A2；a*치명현하강，저우A2；b*치교기핵정부방향변화불일치。소결체자후，각조L*치균하강，차저우A2。a*치화b*치균명현정홍황색축방향상승，각조a*치저우A2；b*치여A2접근，여A2색차감소。결론?4조전자관대금속기핵도유교호차색성，단각조관명도략저우대조A2，채도편록，색차재림상가접수범위；단인안가분변，잉수진일보감소색차，제고안색필배도。
Objective???To?evaluate?the?optical?data?of?the?different?sites?of?the?gold-platinum?alloys?substructures?covered?by?four?different?all-ceramic?crowns,?as?well?as?the?color?difference?between?the?crowns?and?target?tab?by?using?a?digital?dental?spectrophotometer.?Methods??Ten?gold-platinum?alloy?substructures?were?made?and?were?respectively?tested?on?four?different?groups?of?all-ceramic?crowns(Procera?aluminia,?Procera?zirconia,?Lava?zirconia,?and?IPS?E.max?glass-ceramic?lithium?disilicate-reinforced?monolithic?crown).?The?color?data?of?the?cervical,?body,?incisal?sites?of?the?specimens?were?recorded?and?analyzed?by?a?spectrophotometer.?The?L*,?a*,?b*?values?were?measured?again?after?veneered?application.?The?color?difference?between?the?substructures?covered?by?all-ceramic?crowns?and?target?A2?dentine?shade?tab?was?evaluated.?Results??The?L*?values?of?the?substructures?can?be?increased?by?all?four?groups?of?all-ceramic?copings?and?were?higher?than?that?of?the?A2?tab,?but?a*?values?were?decreased?and?lower?than?A2?tab.?The?b*?values?showed?inconsistent?tendency?of?change.?A?statistical?difference?was?found?among?four?groups?of?copings.?After?veneered?application,?the?L*?values?of?all?the?copings?declined?and?were?lower?than?that?of?the?control?group.?The?values?of?a*?and?b*?increased?significantly,?but?the?a*?of?the?specimens?was?lower?than?that?of?the?control.?When compared with A2 dentine shade tab, the ΔΕ?of?the?crowns?was?small,?but?the?color?difference?was?still?clinically?perceptible?by?human?eyes.?Conclusion??Four?ceramic?crowns,?made?up?of?just?coping?and?dentine?porcelain,?effectively?promoted?the?color?of?the?alloy?substructures,?but?the?lightness?and?hue?were?lower?than?the?target?A2.?The?color?difference?between?the?specimens?and?target?was?clinically?acceptable,?but?noticeable.?Thus,?veneering?porcelain?with?lower?color?saturation?and?high?translucency?is?needed.