Impact of polishing system on surface roughness of different ceramic surfaces after various pretreatments and bracket debonding

Jungbauer R, Liebermann A, Hammer C, Edelhoff D, Proff P, Stawarczyk B (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Clinical Oral Investigations Springer Verlag (Germany)

DOI: 10.1007/s00784-023-05058-3

Abstract

Objective: Evaluating various polishing methods after bracket debonding and excessive attachment material removal for different ceramics and pretreatments. Material and methods: Zirconia (ZrO2), leucite (LEU) and lithium disilicate (LiSi) specimens were pretreated with a) silica coated alumina particles (CoJet); LEU and LiSi additionally with b) hydrofluoric acid (HF), c) Monobond Etch&Prime (MEP), d) silicium carbide grinder (SiC) before bracket bonding, shearing off, ARI evaluation, excessive attachment material removal and polishing with i) Sof-Lex Discs (Soflex), ii) polishing paste (Paste), iii) polishing set (Set). Before/after polishing surface roughness (Ra) was measured with a profilometer. Martens hardness parameter were also assessed. Results: Irrespective of pretreatment Ra of LEU increased the most, followed by LiSi and ZrO2 (p < 0.001, SiC: p = 0.012), in accordance with the measured Martens hardness parameter. CoJet/SiC caused greater roughness as HF/MEP (p < 0.001). The ZrO2 surface was rougher after polishing with Paste/Set (p < 0.001; p = 0.047). Ra improved in the LEU/CoJet, LEU/SiC and LiSi/SiC groups with Soflex/Set (p < 0.001), in the LiSi/CoJet and LEU/HF groups by Soflex (p = 0.003, p < 0.001) and worsened by Paste (p = 0.017, p < 0.001). Polishing of HF or MEP pretreated LiSi with Set increased Ra (p = 0.001, p < 0.001), so did Paste in the LEU/MEP group (p < 0.001). Conclusions: Paste couldn’t improve the surfaces. Soflex was the only method decreasing Ra on rough surfaces and not causing roughness worsening. Polishing of LEU/LiSi after MEP, LEU after HF pretreatment doesn´t seem to have any benefit. Clinical Relevance: To avoid long-term damage to ceramic restorations, special attention should be paid to the polishing method after orthodontic treatment.

Authors with CRIS profile

Christian Hammer Lehrstuhl für Funktionelle und Klinische Anatomie

Involved external institutions

Universitätsklinikum Regensburg DE Germany (DE) Universität zu Köln DE Germany (DE) Ludwig-Maximilians-Universität (LMU) DE Germany (DE)

How to cite

APA:

Jungbauer, R., Liebermann, A., Hammer, C., Edelhoff, D., Proff, P., & Stawarczyk, B. (2023). Impact of polishing system on surface roughness of different ceramic surfaces after various pretreatments and bracket debonding. Clinical Oral Investigations. https://dx.doi.org/10.1007/s00784-023-05058-3

MLA:

Jungbauer, Rebecca, et al. "Impact of polishing system on surface roughness of different ceramic surfaces after various pretreatments and bracket debonding." Clinical Oral Investigations (2023).

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