Stereomicroscope-Based in Vitro Study Evaluating the Marginal and Internal Fit of PEEK and PEKK Crowns.

Autor: Amalorpavam V; Assistant Professor, Department of Prosthodontics, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli, Tamil Nadu, India., Chandramohan G; Head of the Department and Professor, Department of Prosthodontics, Sree Mookambika Institute of Dental Sciences, Kulsekaram, Kanyakumari, India., Soundar J; Assistant Professor, Department of Prosthodontics, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli, Tamil Nadu, India., Shankar K; Associate Professor, Department of Prosthodontics, Chettinad Dental College, Chennai, India., Missier MS; Assistant Professor, Department of Orthodontics, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli, Tamil Nadu, India., Hines AJ; Associate Professor, Department of Prosthodontics, Sree Mookambika Institute of Dental Sciences, Kavalkinaru, Tirunelveli, Tamil Nadu, India.
Jazyk: angličtina
Zdroj: Journal of pharmacy & bioallied sciences [J Pharm Bioallied Sci] 2024 Apr; Vol. 16 (Suppl 2), pp. S1404-S1408. Date of Electronic Publication: 2024 Apr 16.
DOI: 10.4103/jpbs.jpbs_756_23
Abstrakt: Purpose: The aim of the in vitro study was to compare the internal merge and marginal perfection of polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) crowns under a stereomicroscope.
Methods: All-ceramic preparation is done on the maxillary first premolar which is mounted on the wax block which was scanned using 3Shape scanner and duplicated into 30 acrylic CAD/CAM dies ( n = 15) for the placement of PEEK and PEKK crowns. The YENADENT milling system was used to fabricate 15 samples from Group A PEEK crowns and to fabricate 15 samples from Group B PEKK crowns. According to the manufacturer's instructions, an equal amount of the dual-cure resin luting agent (Rely X U200 Self-Adhesive resin, 3M, Germany) was dispensed on the mixing pad before being mixed with cement and painted on the internal surfaces of the copings with the finger pressure crowns which were luted. The values were then analyzed using one-way ANOVA (post hoc) followed by Dunnett's t -test.
Results: Among those two groups, PEEK group materials showed the lowest mean value of (28.73.3 ± 4.01) for marginal fit and (26.72 ± 2.53) for internal gap, whereas PEKK group showed a mean value of (32.85 ± 4.63) and (33.06 ± 4.14), respectively.
Conclusion: Among these two groups, comparatively less marginal fit and internal adaptation is seen in PEKK when compared to the PEEK crowns. While the marginal fit and internal adaptation of both PEEK and PEKK copings were in acceptable clinical range.
Competing Interests: There are no conflicts of interest.
(Copyright: © 2024 Journal of Pharmacy and Bioallied Sciences.)
Databáze: MEDLINE
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