Preis, Verena and Hahnel, Sebastian and Behr, Michael and Bein, Laila and Rosentritt, Martin (2017) In-vitro fatigue and fracture testing of CAD/CAM-materials in implant-supported molar crowns. DENTAL MATERIALS, 33 (4). pp. 427-433. ISSN 0109-5641, 1879-0097
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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, alpha = 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 921.3 N (PPV) and 4817.8 N (ZIR) [CHAIR], 978.0 N (COH) and 5081.4 N (ZIR) [LAB], 746.7N (PPV) and 3313.5 N (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. (C) 2017 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FIXED DENTAL PROSTHESES; SHOCK ABSORPTION CAPACITY; LABORATORY SIMULATION; RESTORATIVE MATERIALS; ANTERIOR APPLICATION; COMPLICATION RATES; POSTERIOR CROWNS; PARTIAL DENTURES; SINGLE CROWNS; RESISTANCE; CAD/CAM; PEEK; Composite; Zirconia; Zirconia-reinforced lithium silicate; Chewing simulation; Implant crown; Abutment; Fracture resistance |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:00 |
| Last Modified: | 14 Feb 2019 10:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/183 |
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