In vitro performance of one- and two-piece zirconia implant systems for anterior application.

摘要: Abstract Objectives To investigate the long-term in vitro performance and fracture resistance of one-piece bonded two-piece zirconia implant systems for anterior application. Methods Two groups (ZZB), four (Z), two titanium (TTS, reference) were restored with identical monolithic crowns (n = 10/group). Eight specimens per group mounted at an angle 135° chewing simulator subjected to thermal cycling (TC:18,000 cycles; 5°/55°) mechanical loading (ML:3.6 × 10 6 100N) simulating situation. Fracture maximum bending stress determined that survived aging references after 24 h water storage. SEM pictures used failure analysis. Data statistically analysed (one-way-ANOVA, post-hoc Bonferroni, Kaplan-Meier-Log-Rank, α = 0.05). Results A a system TCML without failures. Both totally failed (fractures abutment or implant). Failure numbers other varied between 1× (1 group) 5× (2 groups). Significantly different survival rates found (Log-Rank-test: p = 0.000). Maximum forces/bending stresses significantly (ANOVA: p = 0.000) 188.00 ± 44.80 N/381.02 ± 80.15 N/mm 2 508.67 ± 107.00 N/751.45 ± 36.73 N/mm . Mean values storage not different. Conclusion Zirconia partly showed material defects connection insufficiencies. Bonded had higher lower than implants. Clinical significance Individual may be applied regions limitations.