TY - JOUR

T1 - The effect of surface treatments on the adhesive bond in all-ceramic dental crowns using four-point bending and dynamic loading tests

AU - Worpenberg, Christin

AU - Stiesch, Meike

AU - Eisenburger, Michael

AU - Breidenstein, Bernd

AU - Busemann, Sarah

AU - Greuling, Andreas

N1 - Funding Information: The ceramic framework of tooth 16 (first upper right molar) with cusp support and the underlying tooth stump were created in a 3D model (Rhinoceros® 4.0, Robert McNeel & Associates, USA). The master form for the tooth stump with base was then printed with a 3D printer (Form 2, Formlabs GmbH, Germany) and synthetic resin printing material (Grey Resin, Formlabs GmbH, Germany). The master form was duplicated (Adisil® blau, SILADENT, Germany) and 48 stumps were made of polyurethane-based model stump material (AphaDie MF, SchützDental GmbH, Germany). The frameworks were milled (ceramill® motion 2, Amann Girrbach GmbH, Germany) from 3Y-TZP ceramic discs (Nacera® Pearl 1 Ø 98.3 × 25 mm, DOCERAM Medical Ceramics GmbH, Germany) using the 3D data set. The framework was then finished (milling cutter cone pointed, cross standard and flame special), and milling dust removed with a brush and sintered densely according to the manufacturer's instructions (DOCERAM Medical Ceramics GmbH, 2022b) in a muffle furnace (P310, Nabertherm GmbH, Germany).The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Meike Stiesch reports financial support was provided by German Research Foundation.This research was supported by the Deutsche Forschungsgemeinschaft (DFG), project number 272425256. The authors gratefully thank Baker Hughes for the Micro-CT results. Funding Information: This research was supported by the Deutsche Forschungsgemeinschaft (DFG) , project number 272425256 . The authors gratefully thank Baker Hughes for the Micro-CT results.

PY - 2023/3

Y1 - 2023/3

N2 - The aim of this study was to determine the effect of sandblasting, grinding and plasma treatment on the adhesive bond strength between framework ceramic (Y-TZP) and veneering ceramic (feldspar ceramic). Therefore, four-point bending specimens (n = 180) were cut from densely sintered 3Y-TZP blanks. Subsequently, 80 of these samples received surface treatment by sandblasting and 80 samples by grinding. A reference group (20 samples) was not processed. Half of the specimens that received a surface treatment were additionally exposed to an oxygen plasma treatment. After processing, all specimens were manually veneered with feldspar ceramic and examined with a four-point bending test to evaluate the strain energy release rate G. The surface treatment parameters that achieved the highest and lowest G were transferred to real geometries of a posterior crown (n = 45). The crowns’ ceramic framework was sandblasted and veneered by hand. The all-ceramic crowns were tested in a dynamic loading test and Wöhler curves were evaluated. Four-point bending samples blasted at an angle of 90° at 6 bar and a working distance of 1.5 cm without plasma treatment achieved the highest energy release rate. Samples blasted at an angle of 90° at 2 bar and a working distance of 1 cm with plasma treatment achieved the lowest energy release rate. Overall, plasma treatment did not improve bond strength. In the dynamic loading test, the group blasted with 2 bar showed the best results.

AB - The aim of this study was to determine the effect of sandblasting, grinding and plasma treatment on the adhesive bond strength between framework ceramic (Y-TZP) and veneering ceramic (feldspar ceramic). Therefore, four-point bending specimens (n = 180) were cut from densely sintered 3Y-TZP blanks. Subsequently, 80 of these samples received surface treatment by sandblasting and 80 samples by grinding. A reference group (20 samples) was not processed. Half of the specimens that received a surface treatment were additionally exposed to an oxygen plasma treatment. After processing, all specimens were manually veneered with feldspar ceramic and examined with a four-point bending test to evaluate the strain energy release rate G. The surface treatment parameters that achieved the highest and lowest G were transferred to real geometries of a posterior crown (n = 45). The crowns’ ceramic framework was sandblasted and veneered by hand. The all-ceramic crowns were tested in a dynamic loading test and Wöhler curves were evaluated. Four-point bending samples blasted at an angle of 90° at 6 bar and a working distance of 1.5 cm without plasma treatment achieved the highest energy release rate. Samples blasted at an angle of 90° at 2 bar and a working distance of 1 cm with plasma treatment achieved the lowest energy release rate. Overall, plasma treatment did not improve bond strength. In the dynamic loading test, the group blasted with 2 bar showed the best results.

KW - Dental ceramics

KW - Dynamic loading test

KW - Energy release rate

KW - Surface treatment

KW - Zirconia

UR - http://www.scopus.com/inward/record.url?scp=85146855144&partnerID=8YFLogxK

U2 - 10.1016/j.jmbbm.2023.105686

DO - 10.1016/j.jmbbm.2023.105686

M3 - Article

C2 - 36706651

AN - SCOPUS:85146855144

VL - 139

JO - Journal of the Mechanical Behavior of Biomedical Materials

JF - Journal of the Mechanical Behavior of Biomedical Materials

SN - 1751-6161

M1 - 105686

ER -