Retention force of differently fabricated telescopic PEEK crowns with different tapers

• Published in: Dental Materials Journal Vol. 35; no. 4; pp. 594 - 600
• Main Authors: Veronika STOCK, Christina WAGNER, Susanne MERK, Malgorzata ROOS, Patrick R.SCHMIDLIN, Marlis EICHBERGER, Bogna STAWARCZYK
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society for Dental Materials and Devices 01.08.2016
• ISSN: 0287-4547; 1881-1361

To assess the retention force between primary and secondary PEEK crowns made by different fabrication methods. Primary crowns with different tapers (0°, 1°, and 2°) were fabricated and secondary crowns that were either milled from breCam BioHPP blanks, pressed from pellets (BioHPP Pellet) or granules (BioHPP Granulat) were produced. Each specimen was measured 20 times in a pull-off-test and results were analyzed using 2-/1-way ANOVA and linear regression analyses (p<0.05). Within 0°tapered crowns milled secondary crowns showed lower retention forces compared to pressed pellet crowns. Crowns with a 1°taper, however, showed no impact of the fabrication method on retention force. At a 2°taper, granular pressed crowns displayed lower values than their milled counterparts. Within the milled group, a 0°taper showed lower retention values than the higher tapers, whereas in the pressed groups, no impact of taper angle on retention force was found.