TY - JOUR
T1 - Comparative reliability analyses of zirconium oxide and lithium disilicate restorations in vitro and in vivo
AU - Silva, Nelson R F A
AU - Thompson, Van P.
AU - Valverde, Guiherme Bonecker
AU - Coelho, Paulo G.
AU - Powers, John M.
AU - Farah, John W.
AU - Esquivel-Upshaw, Josephine
N1 - Publisher Copyright:
© 2011 American Dental Association
PY - 2011/4
Y1 - 2011/4
N2 - Background: The authors analyzed the in vitro and in vivo performance of lithium disilicate glass-ceramic (LDGC) restorations and yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) (that is, zirconium oxide) restorations with regard to reliability, clinical performance and abrasion resistance. Methods: In the in vitro study, four authors subjected samples of LDGC, Y-TZP and metal-ceramic crowns to step-stress fatigue testing. Four investigators assessed the in vivo clinical performance of LDGC and zirconium oxide–based restorations at four and seven years, respectively. In addition, one author conducted a randomized, controlled clinical trial to analyze the volumetric loss of enamel and ceramic antagonist surfaces. Results: The LDGC crowns exhibited the highest fatigue load-to-failure values in the in vitro analysis. The results of the in vivo assessment showed that the clinical performance of the LDGC restorations at four years was comparable to that of the zirconium oxide–based crowns at seven years. The results of the in vivo, randomized, controlled clinical trial showed that LDGC crowns were not only resistant to wear, but also were wear friendly to enamel antagonist surfaces. Conclusions: The LDGC crowns in the in vitro and in vivo studies exhibited high durability, and they were wear friendly to opposing natural dentition. Clinical Implications: LDGC and zirconium oxide–based crowns are a clinically acceptable means of treating teeth that require full-coverage restorations. In addition, LDGC materials exhibit excellent clinical performance, as well as demonstrate acceptable abrasion compatibility with the opposing natural dentition.
AB - Background: The authors analyzed the in vitro and in vivo performance of lithium disilicate glass-ceramic (LDGC) restorations and yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) (that is, zirconium oxide) restorations with regard to reliability, clinical performance and abrasion resistance. Methods: In the in vitro study, four authors subjected samples of LDGC, Y-TZP and metal-ceramic crowns to step-stress fatigue testing. Four investigators assessed the in vivo clinical performance of LDGC and zirconium oxide–based restorations at four and seven years, respectively. In addition, one author conducted a randomized, controlled clinical trial to analyze the volumetric loss of enamel and ceramic antagonist surfaces. Results: The LDGC crowns exhibited the highest fatigue load-to-failure values in the in vitro analysis. The results of the in vivo assessment showed that the clinical performance of the LDGC restorations at four years was comparable to that of the zirconium oxide–based crowns at seven years. The results of the in vivo, randomized, controlled clinical trial showed that LDGC crowns were not only resistant to wear, but also were wear friendly to enamel antagonist surfaces. Conclusions: The LDGC crowns in the in vitro and in vivo studies exhibited high durability, and they were wear friendly to opposing natural dentition. Clinical Implications: LDGC and zirconium oxide–based crowns are a clinically acceptable means of treating teeth that require full-coverage restorations. In addition, LDGC materials exhibit excellent clinical performance, as well as demonstrate acceptable abrasion compatibility with the opposing natural dentition.
KW - All-ceramic
KW - computer-aided design/computer-aided manufacturing
KW - esthetic restoration
KW - in vitro
KW - in vivo
KW - lithium disilicate glass-ceramic
KW - metal-ceramic
KW - zirconium oxide
UR - http://www.scopus.com/inward/record.url?scp=79959618512&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959618512&partnerID=8YFLogxK
U2 - 10.14219/jada.archive.2011.0336
DO - 10.14219/jada.archive.2011.0336
M3 - Article
C2 - 21454834
AN - SCOPUS:79959618512
SN - 0002-8177
VL - 142
SP - 4S-9S
JO - Journal of the American Dental Association
JF - Journal of the American Dental Association
ER -