[Clinical application of optimal designed Upcera super transparent zirconia all-ceramic restorations].
OBJECTIVE
To summarize the clinical application of special designed Upcera ST zirconia all-ceramic restorations in cases with limited occlusal space.


METHODS
Twenty-one patients with 23-unit restorations were enrolled in this study. First, the shape of abutment teeth and diagnostic wax-up were captured and digitized by Sirona inEos system. Then, each individually shaped framework to grant a defined ST zirconia base core was created by the reduced program of inLab software. Finally, all restorations were veneered with VITA VM9 and evaluated at placement using modified U.S.Public Health Service Criteria 6 to 12 months after restoration. Patients were inquired with satisfaction questionnaire at the same time.


RESULTS
During 6 to 12 months of follow-up visit, except for one of 23 restorations was rated as failure by fractured root, none was replaced due to framework fracture or unrestorable delamination of the ceramic veneer. The shape and colour of all restorations were satisfactory.


CONCLUSIONS
To ensure optimum long-term clinical results of all-ceramic crown restorations, one important key is to overcome the fragmentation of dental prosthesis through modifying the shape of restoration. Based on the results of this study, the specially designed processing technology shows sufficient stability for ST zirconia all-ceramic restorations within a short term, which is deserved to be used in selected cases.
Department of Technician, School of Stomatology Nanjing University, Nanjing Stomatological Hospital. Nanjing 210008, Jiangsu Province, China.E-mail:dingchen76@hotmail.com.
Chen
C
Ding
Qing
Q
Yu
Jian-long
JL
Jing
Zheng-ming
ZM
Liu
D002516:Ceramics; D003764:Dental Materials; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D006801:Humans; D015040:Zirconium
D003764:Dental Materials; D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide