Comparative analysis of the retention force and deformation of PEEK and PEKK removable partial denture clasps with different thicknesses and undercut depths.
J Prosthet Dent
; 131(2): 291.e1-291.e9, 2024 Feb.
Article
em En
| MEDLINE
| ID: mdl-38057199
ABSTRACT
STATEMENT OF PROBLEM:
The retentive force and deformation of milled polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) removable partial denture (RPD) frameworks are not well understood.PURPOSE:
The purpose of this in vitro study was to assess the retentive force and deformation of PEEK and PEKK Akers clasps with different designs and undercut depths. MATERIAL ANDMETHODS:
A master model containing the first and second molar abutments was used to design Akers clasps of different cross-sectional dimensions, undercut depths (0.5 and 0.75 mm), and materials. The components of the removable partial denture framework also included an occlusal rest and were manufactured using a milling machine (n=5). The fatigue resistance of the Akers clasps was measured before and after deformation regarding the retentive forces.RESULTS:
The PEEK2-U50 clasp had the largest retentive force with no significant difference among all groups before and after the insertion and removal cycle. In addition, the increased cross-sectional dimensions of the design resulted in significant differences in retentive forces between the PEEK1 and PEEK2 groups and between the PEEK and PEKK materials.CONCLUSIONS:
Increasing the clasp's cross-sectional dimensions significantly impacted retentive forces, especially between different PEEK groups and between PEEK and PEKK materials.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Polímeros
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Benzofenonas
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Ligas de Cromo
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Prótese Parcial Removível
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article