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学科主题: 口腔医学
题名:
Influence of different post core materials on the color of Empress 2 full ceramic crowns
作者: Ge Jing; Wang Xin-zhi; Feng Hai-lan
关键词: color difference ; ceramic crown ; post core ; try-in paste
刊名: CHINESE MEDICAL JOURNAL
发表日期: 2006-10-20
卷: 119, 期:20, 页:1715-1720
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Medicine, General & Internal
研究领域[WOS]: General & Internal Medicine
关键词[WOS]: THICKNESS ; PORCELAIN ; OPAQUE
英文摘要:

Background For esthetic consideration, dentin color post core materials were normally used for all-ceramic crown restorations. However, in some cases, clinicians have to consider combining a full ceramic crown with a metal post core. Therefore, this experiment was conducted to test the esthetical possibility of applying cast metal post core in a full ceramic crown restoration.

Methods The color of full ceramic crowns on gold and Nickel-Chrome post cores was compared with the color of the same crowns on tooth colored post cores. Different try-in pastes were used to imitate the influence of a composite cementation on the color of different restorative combinations. The majority of patients could not detect any color difference less than Delta E 1.8 between the two ceramic samples. So, Delta E 1.8 was taken as the objective evaluative criterion for the evaluation of color matching and patients′ satisfaction.

Results When the Empress 2 crown was combined with the gold alloy post core, the color of the resulting material was similar to that of a glass fiber reinforced resin post core (Delta = 0.3). The gold alloy post core and the try-in paste did not show a perceptible color change in the full ceramic crowns, which indicated that the color of the crowns might not be susceptible to change between lab and clinic as well as during the process of composite cementation. Without an opaque covering the Ni-Cr post core would cause an unacceptable color effect on the crown (Delta E = 2.0), but with opaque covering, the color effect became more clinically satisfactory (Delta E = 1.8).

Conclusions It may be possible to apply a gold alloy post core in the Empress 2 full ceramic crown restoration when necessary. If a non-extractible Ni-Cr post core exists in the root canal, it might be possible to restore the tooth with an Empress 2 crown after covering the labial surface of the core with one layer of opaque resin cement.

语种: 英语
WOS记录号: WOS:000241971000008
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/67865
Appears in Collections:北京大学口腔医学院_口腔修复科_期刊论文

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作者单位: Peking Univ, Dept Prosthodont, Sch & Hosp Stomatol, Beijing 100081, Peoples R China

Recommended Citation:
Ge Jing,Wang Xin-zhi,Feng Hai-lan. Influence of different post core materials on the color of Empress 2 full ceramic crowns[J]. CHINESE MEDICAL JOURNAL,2006,119(20):1715-1720.
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