P3 - Mimicking clinical wear of RBCs in the ‘Rub&Roll’ wear machine

E Maier; J Ruben; W Palin; E Bronkhorst; M-C Huysmans; U Lohbauer; B Loomans

doi:10.1016/j.dental.2023.08.013

Abstract

Purpose The Rub&Roll wear machine enables controlled application of force, chemical and mechanical loading. However, the flexible PVC rods used as antagonists in the standard set-up do not mimic the wear behavior against restorative materials. The current project aimed to adjust the set-up of the Rub&Roll wear machine to better enable relevant material testing. Methods The Rub&Roll set-up was changed as follows: PVC-rods were exchanged with 3D-printed photocurable methacrylate resin (Clear v4) rods printed on a single build platform SLA printer (Form2, Formlabs). Resin based composite (RBC) specimens were manufactured in tooth shape: indirect RBCs milled from an intraoral scan of a first molar (M5speed/Zirkonzahn); for direct RBCs a high-precision impression (Panasil binetics/Kettenbach) of the milled specimens was used as a mold, consecutively filled in 2mm increments and light-cured respectively (20s, Bluephase20i, Ivoclar-Vivadent). To ensure flexibility of the system, rubber inserts were positioned at the sides (1mm) and below (3mm) the specimens. Three direct RBCs (GrandioSO/VOCO, Filtek Supreme XTE/3M, Clearfil APX/Kuraray), two indirect RBCs (GrandioBlocs/VOCO, Lava Ultimate/3M) and human molars were challenged in water (Group1), acid (52mMol citric acid, pH=3.7, Group2), water+abrasive medium (millet seed suspension, Group3), acid+abrasive medium (Group4) for 2 days with 0.5mm protrusion, followed by 2 days with 1.0mm protrusion. Solutions were changed daily, pH-values were measured respectively. Non-contact profilometry (ProScan2000/Scantron) was used at baseline and after 2 and 4 days measuring mean height loss. Load was measured in a novel set-up in a universal testing-machine (Lloyd instruments). Qualitative microstructural analysis of the worn surfaces of different materials in different solutions was performed using SEM (5kV, Sigma 300/ZEISS). Statistical analysis was performed using pairwise t-test comparison (p=0.05). Results Human molars showed a significant increase in height-loss in Group 2 (808±127µm/4days; p0.05). In Group 3, human molars exhibited no significant difference in wear loss compared with the RBC groups (p>0.05). After 4 days the direct RBCs showed increased wear compared to their indirect counterparts in that group (p

Original language	English
Pages (from-to)	e5
Number of pages	1
Journal	Dental Materials
Volume	39
Issue number	Supplement 1
DOIs	https://doi.org/10.1016/j.dental.2023.08.013
Publication status	E-pub ahead of print - 21 Nov 2023
Event	Academy of Dental Materials, Annual Meeting, 2022 - Athens, Greece Duration: 28 Sept 2022 → 1 Oct 2022 https://www.academydentalmaterials.org/past-meetings/

Bibliographical note

Part of Special Issue - Abstracts of the Academy of Dental Materials, Annual Meeting, Athens, Greece, 2022

Access to Document

10.1016/j.dental.2023.08.013Licence: None: All rights reserved

Cite this

@article{7b08352b0d42422599256b536a1d5bdd,

title = "P3 - Mimicking clinical wear of RBCs in the {\textquoteleft}Rub&Roll{\textquoteright} wear machine",

abstract = "Purpose The Rub&Roll wear machine enables controlled application of force, chemical and mechanical loading. However, the flexible PVC rods used as antagonists in the standard set-up do not mimic the wear behavior against restorative materials. The current project aimed to adjust the set-up of the Rub&Roll wear machine to better enable relevant material testing. Methods The Rub&Roll set-up was changed as follows: PVC-rods were exchanged with 3D-printed photocurable methacrylate resin (Clear v4) rods printed on a single build platform SLA printer (Form2, Formlabs). Resin based composite (RBC) specimens were manufactured in tooth shape: indirect RBCs milled from an intraoral scan of a first molar (M5speed/Zirkonzahn); for direct RBCs a high-precision impression (Panasil binetics/Kettenbach) of the milled specimens was used as a mold, consecutively filled in 2mm increments and light-cured respectively (20s, Bluephase20i, Ivoclar-Vivadent). To ensure flexibility of the system, rubber inserts were positioned at the sides (1mm) and below (3mm) the specimens. Three direct RBCs (GrandioSO/VOCO, Filtek Supreme XTE/3M, Clearfil APX/Kuraray), two indirect RBCs (GrandioBlocs/VOCO, Lava Ultimate/3M) and human molars were challenged in water (Group1), acid (52mMol citric acid, pH=3.7, Group2), water+abrasive medium (millet seed suspension, Group3), acid+abrasive medium (Group4) for 2 days with 0.5mm protrusion, followed by 2 days with 1.0mm protrusion. Solutions were changed daily, pH-values were measured respectively. Non-contact profilometry (ProScan2000/Scantron) was used at baseline and after 2 and 4 days measuring mean height loss. Load was measured in a novel set-up in a universal testing-machine (Lloyd instruments). Qualitative microstructural analysis of the worn surfaces of different materials in different solutions was performed using SEM (5kV, Sigma 300/ZEISS). Statistical analysis was performed using pairwise t-test comparison (p=0.05). Results Human molars showed a significant increase in height-loss in Group 2 (808±127µm/4days; p0.05). In Group 3, human molars exhibited no significant difference in wear loss compared with the RBC groups (p>0.05). After 4 days the direct RBCs showed increased wear compared to their indirect counterparts in that group (p",

author = "E Maier and J Ruben and W Palin and E Bronkhorst and M-C Huysmans and U Lohbauer and B Loomans",

note = "Part of Special Issue - Abstracts of the Academy of Dental Materials, Annual Meeting, Athens, Greece, 2022; Academy of Dental Materials, Annual Meeting, 2022, ADM 2022 ; Conference date: 28-09-2022 Through 01-10-2022",

year = "2023",

month = nov,

day = "21",

doi = "10.1016/j.dental.2023.08.013",

language = "English",

volume = "39",

pages = "e5",

journal = "Dental Materials",

issn = "0109-5641",

publisher = "Elsevier",

number = "Supplement 1",

url = "https://www.academydentalmaterials.org/past-meetings/",

}

TY - JOUR

T1 - P3 - Mimicking clinical wear of RBCs in the ‘Rub&Roll’ wear machine

AU - Maier, E

AU - Ruben, J

AU - Palin, W

AU - Bronkhorst, E

AU - Huysmans, M-C

AU - Lohbauer, U

AU - Loomans, B

N1 - Part of Special Issue - Abstracts of the Academy of Dental Materials, Annual Meeting, Athens, Greece, 2022

PY - 2023/11/21

Y1 - 2023/11/21

N2 - Purpose The Rub&Roll wear machine enables controlled application of force, chemical and mechanical loading. However, the flexible PVC rods used as antagonists in the standard set-up do not mimic the wear behavior against restorative materials. The current project aimed to adjust the set-up of the Rub&Roll wear machine to better enable relevant material testing. Methods The Rub&Roll set-up was changed as follows: PVC-rods were exchanged with 3D-printed photocurable methacrylate resin (Clear v4) rods printed on a single build platform SLA printer (Form2, Formlabs). Resin based composite (RBC) specimens were manufactured in tooth shape: indirect RBCs milled from an intraoral scan of a first molar (M5speed/Zirkonzahn); for direct RBCs a high-precision impression (Panasil binetics/Kettenbach) of the milled specimens was used as a mold, consecutively filled in 2mm increments and light-cured respectively (20s, Bluephase20i, Ivoclar-Vivadent). To ensure flexibility of the system, rubber inserts were positioned at the sides (1mm) and below (3mm) the specimens. Three direct RBCs (GrandioSO/VOCO, Filtek Supreme XTE/3M, Clearfil APX/Kuraray), two indirect RBCs (GrandioBlocs/VOCO, Lava Ultimate/3M) and human molars were challenged in water (Group1), acid (52mMol citric acid, pH=3.7, Group2), water+abrasive medium (millet seed suspension, Group3), acid+abrasive medium (Group4) for 2 days with 0.5mm protrusion, followed by 2 days with 1.0mm protrusion. Solutions were changed daily, pH-values were measured respectively. Non-contact profilometry (ProScan2000/Scantron) was used at baseline and after 2 and 4 days measuring mean height loss. Load was measured in a novel set-up in a universal testing-machine (Lloyd instruments). Qualitative microstructural analysis of the worn surfaces of different materials in different solutions was performed using SEM (5kV, Sigma 300/ZEISS). Statistical analysis was performed using pairwise t-test comparison (p=0.05). Results Human molars showed a significant increase in height-loss in Group 2 (808±127µm/4days; p0.05). In Group 3, human molars exhibited no significant difference in wear loss compared with the RBC groups (p>0.05). After 4 days the direct RBCs showed increased wear compared to their indirect counterparts in that group (p

AB - Purpose The Rub&Roll wear machine enables controlled application of force, chemical and mechanical loading. However, the flexible PVC rods used as antagonists in the standard set-up do not mimic the wear behavior against restorative materials. The current project aimed to adjust the set-up of the Rub&Roll wear machine to better enable relevant material testing. Methods The Rub&Roll set-up was changed as follows: PVC-rods were exchanged with 3D-printed photocurable methacrylate resin (Clear v4) rods printed on a single build platform SLA printer (Form2, Formlabs). Resin based composite (RBC) specimens were manufactured in tooth shape: indirect RBCs milled from an intraoral scan of a first molar (M5speed/Zirkonzahn); for direct RBCs a high-precision impression (Panasil binetics/Kettenbach) of the milled specimens was used as a mold, consecutively filled in 2mm increments and light-cured respectively (20s, Bluephase20i, Ivoclar-Vivadent). To ensure flexibility of the system, rubber inserts were positioned at the sides (1mm) and below (3mm) the specimens. Three direct RBCs (GrandioSO/VOCO, Filtek Supreme XTE/3M, Clearfil APX/Kuraray), two indirect RBCs (GrandioBlocs/VOCO, Lava Ultimate/3M) and human molars were challenged in water (Group1), acid (52mMol citric acid, pH=3.7, Group2), water+abrasive medium (millet seed suspension, Group3), acid+abrasive medium (Group4) for 2 days with 0.5mm protrusion, followed by 2 days with 1.0mm protrusion. Solutions were changed daily, pH-values were measured respectively. Non-contact profilometry (ProScan2000/Scantron) was used at baseline and after 2 and 4 days measuring mean height loss. Load was measured in a novel set-up in a universal testing-machine (Lloyd instruments). Qualitative microstructural analysis of the worn surfaces of different materials in different solutions was performed using SEM (5kV, Sigma 300/ZEISS). Statistical analysis was performed using pairwise t-test comparison (p=0.05). Results Human molars showed a significant increase in height-loss in Group 2 (808±127µm/4days; p0.05). In Group 3, human molars exhibited no significant difference in wear loss compared with the RBC groups (p>0.05). After 4 days the direct RBCs showed increased wear compared to their indirect counterparts in that group (p

U2 - 10.1016/j.dental.2023.08.013

DO - 10.1016/j.dental.2023.08.013

M3 - Abstract

SN - 0109-5641

VL - 39

SP - e5

JO - Dental Materials

JF - Dental Materials

IS - Supplement 1

T2 - Academy of Dental Materials, Annual Meeting, 2022

Y2 - 28 September 2022 through 1 October 2022

ER -

P3 - Mimicking clinical wear of RBCs in the ‘Rub&Roll’ wear machine

Abstract

Bibliographical note

Access to Document

Fingerprint

Cite this