Clinical fractures of veneered zirconia single crowns.
Crowns made from an yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) core with a porcelain veneer have shown high clinical failure rates. Manifestations of clinical failure in veneering ceramic ranges from a single chip to an extended fracture. Core failures are uncommon but usually are catastrophic. This article examines the possible causes of failure in zirconia systems and presents a case report involving the diagnosis and repair of three different types of failure in six 3Y-TZP/porcelain crowns.
Antonio Alves
AA
de Almeida
Oscar Fernando
OF
Munoz Chavez
Beatriz Regalado
BR
Galvao
Gelson Luis
GL
Adabo
D003442:Crowns / Q000009:adverse effects*; D019232:Dental Restoration Failure; D003801:Dental Veneers / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged; D015019:Yttrium; D015040:Zirconium
C499362:yttria stabilized tetragonal zirconia; D015019:Yttrium; D015040:Zirconium
crowns; dental porcelain; dental restoration; dental restoration failure; human; zirconium