TY - JOUR T1 - Bending moments of zirconia and titanium abutments with internal and external implant-abutment connections after aging and chewing simulation. AU - Truninger,Thomas C, AU - Stawarczyk,Bogna, AU - Leutert,Christian R, AU - Sailer,Thomas R, AU - Hämmerle,Christoph H F, AU - Sailer,Irena, Y1 - 2011/03/28/ PY - 2011/3/30/entrez PY - 2011/3/30/pubmed PY - 2012/6/1/medline SP - 12 EP - 8 JF - Clinical oral implants research JO - Clin Oral Implants Res VL - 23 IS - 1 N2 - OBJECTIVES: To test the fracture load of zirconia abutments with different types of implant-abutment connections after chewing simulation and to compare their bending moments to internally connected identical titanium abutments. MATERIALS AND METHODS: Forty-eight identical customized zirconia abutments with different implant-abutment connections were fabricated for four different test groups: one-piece internal implant-abutment connection (BL; Straumann Bonelevel), two-piece internal implant-abutment connection (RS; Nobel Biocare Replace Select), external implant-abutment connection (B; Brånemark MK III), two-piece internal implant-abutment connection (SP; Straumann Standard Plus). Twelve titanium abutments with one-piece internal implant-abutment connection (T; Straumann Bonelevel) served as control group. After aging by means of thermocycling (5-50°C, 120 s) and chewing simulation (1,200,000 cycles, 49 N load, 1.67 Hz), static load was applied at a 30° angle to the palatal surface until failure. Bending moments were calculated for comparison of the groups. Data were analyzed descriptively and by performing the Kruskal-Wallis test with Bonferroni correction. RESULTS: The mean bending moments of the abutments were 714.1 ± 184.9 N cm (T), 331.7 ± 57.8 N cm (BL), 429.7 ± 62.8 N cm (RS), 285.8 ± 64.4 N cm (B) and 379.9 ± 59.1 N cm (SP). The bending moments of control group T were significantly higher than those of all other groups. The values of group RS were significantly higher than those of group B but within the value range of groups SP and BL. CONCLUSION: The bending moments of the different tested types of zirconia abutments vary with different implant-abutment connections after chewing simulation. The use of a secondary metallic component might have a beneficial influence on the stability of zirconia abutments. SN - 1600-0501 UR - https://www.unboundmedicine.com/medline/citation/21443610/Bending_moments_of_zirconia_and_titanium_abutments_with_internal_and_external_implant_abutment_connections_after_aging_and_chewing_simulation_ L2 - https://doi.org/10.1111/j.1600-0501.2010.02141.x DB - PRIME DP - Unbound Medicine ER -