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Çakmak G, Donmez MB, Atalay S, de Paula MS, Fonseca M, Schimmel M, Yilmaz B. Surface roughness and stainability of CAD-CAM denture base materials after simulated brushing and coffee thermocycling. J Prosthet Dent 2024; 132:260-266. [PMID: 35995602 DOI: 10.1016/j.prosdent.2022.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/10/2022] [Accepted: 06/10/2022] [Indexed: 11/16/2022]
Abstract
STATEMENT OF PROBLEM Denture bases machined from prepolymerized materials have become popular. However, information on the effect of simulated brushing and coffee thermocycling (CTC) on their surface roughness and stainability is lacking. PURPOSE The purpose of this in vitro study was to compare the effect of simulated brushing and CTC on the surface roughness (Ra) and stainability of computer-aided design and computer-aided manufacturing (CAD-CAM) denture base materials and a heat-polymerized denture base material. MATERIAL AND METHODS Forty disk-shaped specimens were prepared from 3 CAD-CAM denture base resins (AvaDent, AV; Merz M-PM, M-PM; and Polident d.o.o, Poli) and a heat-polymerized polymethylmethacrylate resin (Promolux, CV) (n=10). Ra values of the specimens were measured by using a noncontact profilometer after conventional polishing. The color coordinates were also measured over a gray background with a spectrophotometer. Specimens were then consecutively subjected to simulated brushing for 20 000 cycles, CTC for 5000 cycles, and another 10 000 brushing cycles. Ra and color coordinates were measured after each interval. Color differences (ΔE00) were calculated by using the CIEDE2000 formula, and the data were analyzed by using 2-way analysis of variance and Tukey honestly significant difference tests (α=0.05). RESULTS The time interval had a significant effect on Ra (P<.001) as brushing cycles resulted in higher values than those at baseline and after CTC (P<.001). However, the differences between brushing cycles (P=.143) and between the baseline and after CTC (P=.994) were not significant. The interaction between the material type and time interval was significant for ΔE00 (P=.016). The only significant difference in ΔE00 values was observed between M-PM and CV after all treatments were completed (P=.029). CONCLUSIONS Brushing increased the Ra of all materials when compared with the baseline. All materials showed similar stainability throughout the brushing and CTC processes. However, M-PM CAD-CAM denture base resin underwent a greater color change after all treatments were completed than conventional denture base resin. All color changes can be considered clinically small, considering reported perceptibility and acceptability thresholds.
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Affiliation(s)
- Gülce Çakmak
- Senior Research Associate, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Mustafa Borga Donmez
- Assistant Professor, Istinye University, Faculty of Dentistry, Department of Prosthodontics, İstanbul, Turkey; Visiting Researcher, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
| | - Sevda Atalay
- Prosthodontist, Private Practice, İstanbul, Turkey
| | - Marcella Silva de Paula
- Visiting Researcher, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; PhD Student, Universidade Federal de Goiás, Department of Prevention and Oral Rehabilitation, Goiânia, Goiás, Brazil
| | - Manrique Fonseca
- Senior Lecturer, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Martin Schimmel
- Professor and Chair, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Senior Lecturer, Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Burak Yilmaz
- Associate Professor, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Associate Professor, Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Adjunct Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, OH, USA
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Campos DES, Ferreira Muniz ÍDA, da Costa TKVL, Lima RBW, Neppelenbroek KH, Batista AUD. Effect of simulated brushing with dentifrices on surface roughness and the mass loss of acrylic resin: A systematic review and meta-analysis of in vitro studies. J Prosthet Dent 2023:S0022-3913(23)00437-7. [PMID: 37612194 DOI: 10.1016/j.prosdent.2023.06.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 08/25/2023]
Abstract
STATEMENT OF PROBLEM Brushing with dentifrice is the most commonly used denture cleaning method. However, it can result in the mass loss of acrylic resin and an increase in surface roughness, which favors the adherence of microorganisms. PURPOSE The purpose of this systematic review and meta-analysis of in vitro studies was to assess the influence of simulated brushing by using dentifrices and water on surface roughness and the mass loss of acrylic resins. MATERIAL AND METHODS Searches were performed in PubMed, Scopus, Web of Science, Lilacs, Embase, Open Gray, and Google Scholar databases in September 2022. The study selection process, data extraction, and risk of bias analysis were performed following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The protocol of this systematic review was registered in the Open Science Framework (DOI number 10.17605/OSF.IO/QD4GH). Meta-analysis was performed by using a random effects model (α=.05) in the RevMan (Cochrane Collaboration) software program. RESULTS A total of 14 studies were included in the qualitative synthesis and 2 studies in the quantitative synthesis. The manual toothbrush was the most analyzed (n=9), followed by the electric toothbrush (n=5) and denture brush (n=1). Denture base resin (n=8) was evaluated more than acrylic resin for the abrasiveness of toothpaste (n=6). Most studies used conventional toothpaste (n=12), whereas 6 used specific dentifrices. The period of brushing corresponding to 1 year was the most predominant (n=6). Surface roughness (n=13) was evaluated more than mass loss (n=4). In general, dentifrices resulted in greater surface roughness than water. According to meta-analysis results, brushing by using dentifrices reported higher mass loss values than brushing with distilled water (P<.05). CONCLUSIONS Brushing acrylic resins with dentifrice was more abrasive than brushing with water.
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Affiliation(s)
- Débora E Silva Campos
- PhD student, Postgraduate Program in Dentistry, Federal University of Paraiba (UFPB), João Pessoa, Paraiba, Brazil
| | | | | | | | - Karin Hermana Neppelenbroek
- Associate Professor, Department of Periodontics and Prosthodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, São Paulo, Brazil
| | - André Ulisses Dantas Batista
- Associate Professor, Department of Restorative Dentistry, Federal University of Paraíba (UFPB), João Pessoa, Paraiba, Brazil.
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