West China Journal of Stomatology

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Influence of differ ent types of posts and cor es on color of IPS- Empr ess 2 crown

LI Dong- fang1,2, YANG Jing- yuan1, YANG Xing- mei1, YANG Liu1, XU Qiang1, GUAN Hong- yu1, WAN Qian- bing3   

  1. 1. Key. Laboratory of Oral Biomedical Engineering of Ministry of Education, Sichuan University, Chengdu 610041, China; 2. Dept. of Prosthodontics, The Affiliated Hospital of Stomatology, Nanchang Univeristy, Nanchang 330006, China; 3. Dept. of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2007-10-25 Revised:2007-10-25 Online:2007-10-20 Published:2007-10-20
  • Contact: WAN Qian- bing,Tel:028- 85501450

Abstract:

Objective To evaluate the influence of different types of posts and cores on the final color of the IPS- Emperss 2 crown. Methods Five types of posts and cores(Cerapost with Empress cosmo, Cerapost with composite resin, gilded Ni- Cr alloy, gold alloy and Ni- Cr alloy)were made. The shifts in color of three points of IPS- Empress 2 crown surface (cervical, middle and incisal)with different posts and cores was measured with a spectroradiometer (PR- 650). Results The L* a* b* values of zirconium oxide and gilded Ni- Cr alloy posts and cores with ceramic crown were the highest. The L* a* values of zirconium oxide posts composite cores were higher while the b* values were lower. The L* a* b* values of Ni - Cr alloy were lower than that of gold alloy and were the lowest. Conclusion In combination with IPS- Empress 2 crown, zirconium oxide posts are suitable for routine use in the anterior dentition, and gilded Ni- Cr alloy and gold alloy posts and cores can be recommended for clinical practice. Ni- Cr alloy posts and cores can not be recommended for clinical practice.

Key words: stomatology, textbookconstruction, innovativetalentcultivation, zirconium oxide, post and core, color