Retention force of polyetheretherketone and cobalt-chrome-molybdenum removable dental prosthesis clasps after artificial aging
| Autor: | Marlis Eichberger, Danka Micovic, Bogna Stawarczyk, Felicitas Mayinger, Malgorzata Roos, Andreas Schleich |
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| Přispěvatelé: | University of Zurich, Mayinger, Felicitas |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Dental Stress Analysis
Materials science Post hoc Polymers Dentistry chemistry.chemical_element 610 Medicine & health 02 engineering and technology Esthetics Dental Polyethylene Glycols Dental Prosthesis Retention 03 medical and health sciences Benzophenones 0302 clinical medicine PEEK Removable dental prosthesis Materials Testing Peek General Dentistry Dental Implants Molybdenum business.industry Dental prosthesis Retention force Cobalt-chrome 10060 Epidemiology Biostatistics and Prevention Institute (EBPI) 030206 dentistry Cobalt Ketones 021001 nanoscience & nanotechnology 3500 General Dentistry Artificial aging Denture Retention chemistry Dental Clasps Denture Partial Removable Original Article Implant Chromium Alloys 0210 nano-technology business Cobalt-chrome-molybdenum Clasp |
| Zdroj: | Clinical Oral Investigations |
| ISSN: | 1436-3771 1432-6981 |
| Popis: | Objectives To examine the retention force of removable dental prosthesis (RDP) clasps made from polyetheretherketone (PEEK) and cobalt-chrome-molybdenum (CoCrMo, control group) after storage in water and artificial aging. Materials and methods For each material, 15 Bonwill clasps with retentive buccal and reciprocal lingual arms situated between the second pre- and first molar were manufactured by milling (Dentokeep [PEEKmilled1], NT digital implant technology; breCAM BioHPP Blank [PEEKmilled2], bredent), pressing (BioHPP Granulat for 2 press [PEEKpressed], bredent), or casting (remanium GM 800+ [CoCrMo], Dentaurum); N = 60, n = 15/subgroup. A total of 50 retention force measurements were performed for each specimen per aging level (initial; after storage [30 days, 37 °C] and 10,000 thermal cycles; after storage [60 days, 37 °C] and 20,000 thermal cycles) in a pull-off test. Data were statistically analyzed using one-way ANOVA, post hoc Scheffé and mixed models (p < 0.05). Results Initial, PEEKpressed (80.2 ± 35.2) and PEEKmilled1 (98.9 ± 40.3) presented the lowest results, while PEEKmilled2 (170.2 ± 51.8) showed the highest values. After artificial aging, the highest retention force was observed for the control group (131.4 ± 56.8). The influence of artificial aging was significantly higher for PEEK-based materials. While PEEKmilled2 and PEEKpressed showed an initial decline in retention force, all other groups presented no impact or an increase in retention force over a repetitive insertion and removal of the clasps. Conclusions Within the tested PEEK materials, PEEKmilled2 presented superior results than PEEKpressed. Although CoCrMo showed higher values after artificial aging, all materials exhibited sufficient retention to recommend usage under clinical conditions. Clinical relevance As RDPs are still employed for a wide range of indications, esthetic alternatives to conventional CoCrMo clasps are sought. |
| Databáze: | OpenAIRE |
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