Retentive Characteristics of a Polyetheretherketone Post-Core Restoration with Polyvinylsiloxane Attachments

Ping Li; Dorina Hasselbeck; Alexey Unkovskiy; Feraydoon Sharghi; Sebastian Spintzyk

doi:10.3390/polym12092005

Retentive Characteristics of a Polyetheretherketone Post-Core Restoration with Polyvinylsiloxane Attachments

Polymers (Basel). 2020 Sep 3;12(9):2005. doi: 10.3390/polym12092005.

Authors

Ping Li¹, Dorina Hasselbeck¹, Alexey Unkovskiy^{2

3}, Feraydoon Sharghi⁴, Sebastian Spintzyk¹

Affiliations

¹ Section Medical Materials Science and Technology, University Hospital Tübingen, Osianderstrasse 2-8, 72076 Tübingen, Germany.
² Department of Prosthodontics, Geriartric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
³ Department of Dental Surgery, Sechenov First Moscow State Medical University, Trubetskaya Str. 8-2, 119991 Moscow, Russia.
⁴ Department of Prosthodontics, University Hospital Tübingen, Osianderstrasse 2-8, 72076 Tübingen, Germany.

Abstract

A new application of a polyetheretherketone (PEEK) post-core restoration combined with polyvinylsiloxane (PVS) attachments was proposed and substantiated. This study aimed to evaluate retentive characteristics of the PEEK post-core restoration with PVS attachment systems. Specimens with PVS attachments were fabricated to evaluate retention force during 10,000 cyclic dislodgements. Additionally, the retention forces of PVS attachments with three different values of Shore hardness were further measured before and after aging treatments. The results of cyclic dislodgement test indicated a strong negative linear relationship between the cyclic times and retention force (p < 0.0001, r = -0.957). Furthermore, the retention forces of the PVS were significantly improved with Shore hardness increased, which was also affected by the aging treatment (F (2, 138) = 10.95, p < 0.0001). Therefore, the PEEK post-core restoration with PVS attachments exhibited the favorable retention force, which could be a promising alternative for dental prostheses.

Keywords: attachment system; dental materials; overdenture; polyetheretherketone; polymer-based material; polyvinylsiloxane; post-core restoration; prosthodontics.