Influence of zirconia and lithium disilicate tooth- or implant-supported crowns on wear of antagonistic and adjacent teeth

• DOI: 10.4047/jap.2020.12.1.1
• Publication Date: 2020-02-24T00:09:57Z
• Authors: Martin Rosentritt; Frederik Schumann; Stephanie Krifka; Verena Preis
• Keywords: Premolar; Abutment; Lithium disilicate

To investigate the influence of crown material (lithium-disilicate, 3Y-TZP zirconia) and abutment type (rigid implant, resin tooth with artificial periodontium) on wear performance their antagonist teeth adjacent teeth.A mandibular left first molar (#36) human (mandibular second premolar: #35, molar: #37) antagonistic (maxillary #25, maxillary #26, #27) was prepared simulating a section jaw. Samples were made extracted molars (Reference), crowned implants (Implant), or analogues (Tooth). Crowns (tooth #36; n = 16/material) milled from lithium-disilicate (Li, IPS e.max CAD) zirconia (Zr, ZirCAD, both Ivoclar Vivadent). Thermal cycling mechanical loading (TCML) in chewing simulator applied 15 years clinical service. Wear traces analyzed (frequency [n], depth [µm]) evaluated using scanning electron pictures. results compared by one-way-ANOVA post-hoc-Bonferroni (α 0.05).After TCML, no visible found Zr. Li showed more (n 30-31) than reference 21). Antagonistic #26 contact to ceramics 27-29) Strong (> 350 µm) antagonists only groups. Abutment influenced number facets teeth.The clinically relevant model allowed for limited comparison situation. The total strong crowns, material.