TY - JOUR T1 - In-vitro fatigue and fracture testing of CAD/CAM-materials in implant-supported molar crowns. AU - Preis,Verena, AU - Hahnel,Sebastian, AU - Behr,Michael, AU - Bein,Laila, AU - Rosentritt,Martin, Y1 - 2017/02/06/ PY - 2016/11/04/received PY - 2016/12/21/revised PY - 2017/01/18/accepted PY - 2017/2/12/pubmed PY - 2018/1/20/medline PY - 2017/2/11/entrez KW - Abutment KW - CAD/CAM KW - Chewing simulation KW - Composite KW - Fracture resistance KW - Implant crown KW - PEEK KW - Zirconia KW - Zirconia-reinforced lithium silicate SP - 427 EP - 433 JF - Dental materials : official publication of the Academy of Dental Materials JO - Dent Mater VL - 33 IS - 4 N2 - OBJECTIVE: To investigate the fatigue and fracture resistance of different CAD/CAM-materials as implant- or tooth-supported molar crowns with respect to the clinical procedure (screwed/bonded restoration). METHODS: 168 crowns were fabricated from different CAD/CAM-materials (n=8/material): ZLS (zirconia-reinforced lithium silicate ceramic; Suprinity, Vita-Zahnfabrik), COB (composite; Brilliant Crios, Coltene), COL (composite; Lava Ultimate, 3M Espe), PMV/PPV (polyether ether ketone (PEEK)+milled composite veneer/composite paste veneer; BioHPP+HIPC veneer/Crealign veneer, Bredent), COH (composite; Block HC, Shofu), and ZIR (zirconia; IPS e.max ZirCAD, Ivoclar-Vivadent) as reference. Three groups were designed simulating the following clinical procedures: (a) chairside procedure ([CHAIR] implant crown bonded to abutment), (b) labside procedure ([LAB] abutment and implant crown bonded in laboratory, screwed chairside), and (c) reference ([TOOTH] crowns bonded on human teeth). Combined thermal cycling and mechanical loading (TCML) were performed simulating a 5-year clinical situation. Fracture force was determined and failures were documented. Data were statistically analyzed (Kolmogorov-Smirnov-test, one-way-ANOVA; post-hoc-Bonferroni, α=0.05). RESULTS: All crowns of group LAB-PPV showed cracks after TCML. The other groups survived fatigue testing without failures. Fracture forces varied between 921.3N (PPV) and 4817.8N (ZIR) [CHAIR], 978.0N (COH) and 5081.4N (ZIR) [LAB], 746.7N (PPV) and 3313.5N (ZIR) [TOOTH]. Significantly (p<0.05) different fracture values were found between materials in all three groups. Only ZLS crowns provided no significant (p>0.05) differences between the individual groups. SIGNIFICANCE: Different ceramic and resin-based materials partly performed differently in implant or tooth situations. Individual resin-based materials (PPV, COB, COH) were weakened by inserting a screw channel. Most CAD/CAM-materials may be clinically applied in implant-supported crowns without restrictions. . SN - 1879-0097 UR - https://www.unboundmedicine.com/medline/citation/28185678/In_vitro_fatigue_and_fracture_testing_of_CAD/CAM_materials_in_implant_supported_molar_crowns_ DB - PRIME DP - Unbound Medicine ER -