Custom and prefabricated PolyEtherKetoneKetone (PEKK) post‐core systems bond strength: Scanning electron microscopy evaluation

Abstract

The present study evaluated the bond strengths of prefabricated PolyEtherKetoneKetone (PEKK) posts, PEKK posts custom‐configured according to root‐canal size, and conventional fiber posts. A total of 30 maxillary incisors were randomly divided into three groups, as follows: Group 1: fiber posts; Group 2: prefabricated PEKK posts; Group 3; custom‐made PEKK posts. Following endodontic treatment, post spaces were prepared, and posts were cemented with resin cement. Push‐out bond strength testing was performed using a universal testing machine, and fractures modes were examined under a scanning electron microscope. Data were analyzed using One‐way ANOVA and Tukey's HSD tests, with the level of significance set at .05. The highest bond‐strength values in the cervical section were observed with the custom‐made PEKK post (17.3470 MPa), whereas the highest bond‐strength values in the middle and apical sections were observed with the conventional fiber posts (11.5375 MPa and 6.8625 MPa, respectively). Bond‐strength values for all posts systems decreased in a cervical to apical direction. PEKK posts are a suitable alternative to fiber posts. Although custom‐made PEKK posts demonstrated better bond strength than prefabricated PEKK posts, further studies are needed to evaluate their clinical performance.

Evaluation of various denture cleansers on color stability and surface topography of polyetherketoneketone, polyamide, and polymethylmethacrylate

“…Therefore, denture cleaning must be performed efficiently and regularly to prevent oral and systemic diseases. Cleaning with chemical solutions is an important factor that can eliminate cross-contamination and contribute to a patient's oral health, duration of denture application, and overall quality of life (Nikawa, Hamada, Yamashiro, & Kumagai, 1999;Webb, which has the advantage of production by milling and pressing processes, makes PEKK an interesting dental material for partially removable dental prosthesis frames, overdenture dental prosthesis frames, and hybrid dental prosthesis frames (Gama et al, 2020;Güven et al, 2020;Lee, Lee, Ryu, & Shin, 2017). Several studies of PMMA (Cakan, Kara, & Kara, 2015;Hong et al, 2009;Machado et al, 2009;Peracini et al, 2010;Ural et al, 2011) and limited studies of polyamide resins (Aysan, Uçar, & Usumez, 2011;Durkan et al, 2013) have recorded the influence of denture cleansers on the mechanical and physical properties of these denture resins.…”

“…Polyetherketoneketone (PEKK) is the last introduced member of the PAEK family with the most improved composition due to its better mechanical and physical properties. Its second ketone functional group gives it better features, such as polish ability, greater compressive strength, and human bone‐like characteristics compared with other members of the PAEK family (Güven, Dayan, Yıldırım, & Mumcu, 2020). There is great interest in tissue‐substitute materials that have a human bone‐like elastic modulus.…”

“…Moreover, because PEKK has a natural radiolucency, the use of PEKK creates less artifact interference than other metal‐supported prostheses in methods such as computed tomography and magnetic resonance imaging (Gama et al, 2020; Stawarczyk et al, 2014). PEKK, which has the advantage of production by milling and pressing processes, makes PEKK an interesting dental material for partially removable dental prosthesis frames, overdenture dental prosthesis frames, and hybrid dental prosthesis frames (Gama et al, 2020; Güven et al, 2020; Lee, Lee, Ryu, & Shin, 2017). Several studies of PMMA (Cakan, Kara, & Kara, 2015; Hong et al, 2009; Machado et al, 2009; Peracini et al, 2010; Ural et al, 2011) and limited studies of polyamide resins (Aysan, Uçar, & Usumez, 2011; Durkan et al, 2013) have recorded the influence of denture cleansers on the mechanical and physical properties of these denture resins.…”

Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow

“…Meanwhile, various tooth-colored materials such as zirconium dioxide [9], hybrid ceramics [10], resin composites, polyether ether ketone, and glass-fiber-reinforced composites [5] are available and have already been investigated in a scattered manner for CAD/CAM-P+C [9,11,12]. However, tooth-colored customized P+C are usually composed of zirconium dioxide [13,14].…”

“…Nevertheless, regarding impression taking for customized CAD/CAM-P+C, the digital workflow typically begins with the indirect digitalization of a conventional silicone impression or plaster model in a laboratory scanner [11,20], because the IOS previously had a relatively shallow depth of field. To take digital impressions directly in the patient's mouth using the intraoral scanner, some manufacturers have developed a so-called scanpost (SP), similar to the scanbodies used for implant impressions [5,17].…”