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Double‐Crown Prosthesis Retention Using Polyetherketoneketone (PEKK): An In Vitro Study
Author(s) -
Igarashi Kensuke,
Katagiri Hiroki,
AbouAyash Samir,
Schimmel Martin,
Afrashtehfar Kelvin I.
Publication year - 2023
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.13512
Subject(s) - materials science , crown (dentistry) , composite material , dentistry , medicine
Purpose To assess the retentive force of telescopic crowns using polyetherketoneketone (PEKK) high‐performance polymer in relation to conventional materials over a long period of time in an in vitro setting. Materials and Methods Thirty‐six sets of primary and secondary crowns were fabricated as per the double crown‐retained prostheses approach. Six samples were included in each of the five test groups (1: zirconia/PEKK [Zr/PEKK]; 2: titanium/PEKK [Ti/PEKK]; 3: cobalt‐chrome/PEKK [CoCr/PEKK]; 4: PEKK/PEKK; and 5: gold/PEKK [Au/PEKK]) and the single control group (gold/galvano‐gold [Au/GA]). The insertion‐removal test was performed for 20,000 cycles, and the surface condition was observed. Retentive forces were analyzed using two‐way ANOVA (α<0.05). Results The retention forces in groups Zr/PEKK and Ti/PEKK significantly decreased over time (group 1: p = 0.035 and group 2: p = 0.001), whereas retentive force increased significantly in groups PEKK/PEKK, Au/PEKK, and control (group 4: p = 0.001, group 5: p = 0.008, and control: p = 0.042). Similar wear was observed on the primary crown in groups PEKK/PEKK, gold/PEKK, and control. Conclusions Groups PEKK/PEKK and Au/PEKK showed a transition of retentive force similar to the control group. Groups PEKK/PEKK and Au/PEKK had similar wear on the surface compared to control. Therefore, PEKK has a promising clinical potential.