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Yoon JM, Liu Y, Sun Y, Ye H, Zhou Y. Clinical evaluation of a one-piece polyetheretherketone removable partial denture fabricated using a novel digital workflow: A self-controlled clinical trial. J Prosthodont 2024. [PMID: 39008343 DOI: 10.1111/jopr.13907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 06/08/2024] [Indexed: 07/16/2024] Open
Abstract
PURPOSE To explore the clinical application of one-piece polyetheretherketone (PEEK) removable partial dentures (RPDs) fabricated using a novel digital workflow and to evaluate their weights and fits in vivo and patient satisfaction. MATERIALS AND METHODS Fifteen cases with posterior partially edentulous situations were selected, and each patient received two types of RPDs, including a novel digital workflow (test group) and a conventional workflow (control group). For the test group, one-piece RPDs were designed through three-dimensional (3D) methods by scanning stone casts and fabricated by milling PEEK discs. Each RPD was weighed. The gaps between the oral tissue and RPDs in each group were duplicated using a polyvinylsiloxane (PVS) replica and measured by 3D analysis. A visual analog scale (VAS) was used to evaluate the patient's satisfaction. Paired t-tests were used to compare the differences in the weight, the gaps of each RPD, and VAS values between the two groups. One-way analysis of variance tests was used to compare the differences in the gap among different components in each group. RESULTS The RPD in the test group weighed less than that in the control group (p < 0.01). No statistically significant differences in the gaps of denture bases and rests (p > 0.05) were found between the two groups, but the gaps of major connectors in the test group were significantly smaller than in the control group (p < 0.05). The VAS scores for comfortableness and masticatory efficiency were not significantly different between the two groups (p > 0.05) but the scores for the aesthetic appearance of the clasps in the test group were significantly higher than that in the control group (p < 0.05). CONCLUSIONS One-piece PEEK RPDs manufactured using a novel digital workflow weighed less than conventional RPDs and exhibited a clinically acceptable internal fit. Although the aesthetic appearance of the PEEK clasps was superior to the control, there is still room for improvement.
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Affiliation(s)
- Jung-Min Yoon
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yunsong Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yuchun Sun
- Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Hongqiang Ye
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yongsheng Zhou
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, China
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Al Deeb L, Almohareb T, Al Ahdal K, Maawadh AM, Alshamrani AS, Alrahlah A. PEEK and glass fiber post pushout bond strength and vickers hardness of canal disinfected with curcumin photosensitizer activated by microbubble emulsion and sodium-hypochlorite with EDTA. Photodiagnosis Photodyn Ther 2024; 47:104076. [PMID: 38582390 DOI: 10.1016/j.pdpdt.2024.104076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/21/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
AIMS Impact of different post-space disinfectants (Saline, Sodium hypochlorite (NaOCl) followed by ethylene-diamine-tetra-acetic acid (EDTA) and curcumin activated by microbubble emulsion (MBE) on the Vickers hardness (VH) of root canal dentin and extrusion bond strength (EBS) of Glass fiber post (GFP) and PEEK post. METHODS Ninety maxillary central incisors having fully formed roots were included. After the specimen's disinfection, root canal treatment was completed. Post space was prepared by removing gutta-percha using gates glidden drills. Teeth were then arbitrarily allocated into three groups based on the methods of disinfection regime used. Group 1: Saline, Group 2: NaOCl+ EDTA and Group 3: Curcumin activated by MBE (n = 30). Analysis of VH of radicular dentin was performed using a micro-Vickers tester on ten samples from each group. After post-space disinfection, twenty specimens from each group were further divided into two subgroups (n = 10) In group-1A 2A, and 3A, GFP was used. Whereas, prefabricated PEEK posts were used in 1B, 2B, and 3B subgroups. The PBS and failure modes were performed using a universal testing machine and stereomicroscope respectively. Data was analyzed using ANOVA and Tukey post hoc test to identify significant variations among groups concerning the MH and EBS of the different posts used (p = 0.05). RESULTS Group 2 (5.25 % NaOCl + 17 % EDTA) (0.15 ± 0.02 GPa) treated specimens presented lowest scores of VH. However, Group 1 (Saline) irrigated canals displayed the highest scores of surface hardness (0.25 ± 0.07 GPa). Additionally, a cervical third of 3A (CP activated by MBE + GFP) (11.22 ± 0.79 MPa) presented the highest scores of bond integrity. Whereas Group 1B (Saline + PEEK post) treated specimens presented the lowest scores of PBS (4.15 ± 0.15 MPa). CONCLUSION Curcumin activated by microbubble emulsion for disinfection of canal dentin demonstrated favorable VH. Similarly, glass fiber post-cemented in radicular walls disinfected with curcumin activated with MBE showed promising post-bond integrity to the canal dentin.
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Affiliation(s)
- Laila Al Deeb
- Department Of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Thamer Almohareb
- Department Of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Khold Al Ahdal
- Department Of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Ahmed M Maawadh
- Department Of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Ahoud S Alshamrani
- Department Of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Ali Alrahlah
- Department Of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia.
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Chen M, Ren M, Shi Y, Liu X, Wei H. State-of-the-art polyetheretherketone three-dimensional printing and multifunctional modification for dental implants. Front Bioeng Biotechnol 2023; 11:1271629. [PMID: 37929192 PMCID: PMC10621213 DOI: 10.3389/fbioe.2023.1271629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/05/2023] [Indexed: 11/07/2023] Open
Abstract
Polyetheretherketone (PEEK) is a high-performance thermoplastic polymer with an elastic modulus close to that of the jawbone. PEEK has the potential to become a new dental implant material for special patients due to its radiolucency, chemical stability, color similarity to teeth, and low allergy rate. However, the aromatic main chain and lack of surface charge and chemical functional groups make PEEK hydrophobic and biologically inert, which hinders subsequent protein adsorption and osteoblast adhesion and differentiation. This will be detrimental to the deposition and mineralization of apatite on the surface of PEEK and limit its clinical application. Researchers have explored different modification methods to effectively improve the biomechanical, antibacterial, immunomodulatory, angiogenic, antioxidative, osteogenic and anti-osteoclastogenic, and soft tissue adhesion properties. This review comprehensively summarizes the latest research progress in material property advantages, three-dimensional printing synthesis, and functional modification of PEEK in the fields of implant dentistry and provides solutions for existing difficulties. We confirm the broad prospects of PEEK as a dental implant material to promote the clinical conversion of PEEK-based dental implants.
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Affiliation(s)
- Meiqing Chen
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Mei Ren
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yingqi Shi
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Xiuyu Liu
- Hospital of Stomatogy, Jilin University, Changchun, China
| | - Hongtao Wei
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
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Zhao T, Jiang Z, Ge Y, Yin H, Yang Q, Li R, Chen Z, Zhang H, Liu X. Mechanical properties, biosafety, and shearing bonding strength of glass fiber-reinforced PEEK composites used as post-core materials. J Mech Behav Biomed Mater 2023; 145:106047. [PMID: 37523841 DOI: 10.1016/j.jmbbm.2023.106047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/02/2023]
Abstract
OBJECTIVE To investigate the mechanical properties, biosafety, and shearing bonding strength of glass fibers-reinforced polyether-ether-ketone (PEEK-GF) for post-core materials. METHODS PEEK-GF composites with different glass fiber contents were prepared by extrusion injection and named PEEK-GF30, PEEK-GF40, and PEEK-GF50. Mechanical properties including flexural modulus, flexural strength, Vickers hardness, and compression strength were tested. The cross-sectional morphology was examined using scanning electron microscopy (SEM). Cytotoxicity was studied in vitro with Cell-counting kit-8 (CCK-8). Cell morphology was observed under a microscope. Cell growth on the composites' surfaces was analyzed with DAPI staining. The shearing bonding strength (SBS) of PEEK-GF50 was assessed after applying different pretreatments. Failure modes were evaluated by microscopy. SEM and contact-angle measurements were performed on the surfaces. Statistical analysis was conducted using one-way ANOVA (P < 0.05). RESULTS The mechanical properties of PEEK-GF composites improved with increased GF content. The PEEK-GF50 group exhibited flexural modulus (17.4 ± 0.5 GPa) close to that of dentin (18.6 GPa) and showed the highest flexural strength (350.0 ± 2.9 MPa), Vickers hardness (47.6 ± 4.5 HV), and compressive strength (264.0 ± 18.0 MPa). The SEM analysis demonstrated that the PEEK matrix combined well with glass fibers. The CCK-8 results confirmed the biosafety of all groups. DAPI staining indicated that cells were growing well on the composites' surface. The sample that was pretreated with sandblasting and plasma showed the highest SBS (16.0 ± 1.7 MPa). SIGNIFICANCE The PEEK-GF composites demonstrated excellent mechanical properties, biosafety, and SBS, and have great potential to serve as post-core materials.
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Affiliation(s)
- Ting Zhao
- Department of Geriatric Dentistry, Hospital of Stomatology, Jilin University, China
| | - Zilong Jiang
- National and Local Joint Engineering Laboratory for Synthetic Technology of High-Performance Polymer, College of Chemistry, Jilin University, China
| | - Yongcheng Ge
- Department of Geriatric Dentistry, Hospital of Stomatology, Jilin University, China
| | - Haoyu Yin
- Department of Geriatric Dentistry, Hospital of Stomatology, Jilin University, China
| | - Qi Yang
- Department of Geriatric Dentistry, Hospital of Stomatology, Jilin University, China
| | - Ruozhu Li
- Department of Pediatric Dentistry, Hospital of Stomatology, Jilin University, China
| | - Zheng Chen
- National and Local Joint Engineering Laboratory for Synthetic Technology of High-Performance Polymer, College of Chemistry, Jilin University, China
| | - Haibo Zhang
- National and Local Joint Engineering Laboratory for Synthetic Technology of High-Performance Polymer, College of Chemistry, Jilin University, China.
| | - Xiaoqiu Liu
- Department of Geriatric Dentistry, Hospital of Stomatology, Jilin University, China.
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Rakotoaridina K, Delrieu J, Pages P, Vergé T, Nasr K, Canceill T. Evaluation of Poly(etheretherketone) Post's Mechanical Strength in Comparison with Three Metal-Free Biomaterials: An In Vitro Study. Polymers (Basel) 2023; 15:3583. [PMID: 37688208 PMCID: PMC10489626 DOI: 10.3390/polym15173583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/26/2023] [Accepted: 08/27/2023] [Indexed: 09/10/2023] Open
Abstract
The thinking about metallic replacement has begun in a global context of reducing metallic alloys' use in odontology. Among the materials proposed for their replacement, poly(etheretherketone) may present interesting properties, especially in removable dentures' frames. The purpose of this study is to evaluate fracture resistance of PEEK posts-and-cores compared to non-metallic CAD/CAM materials and fiber glass posts. Forty extracted maxillary central incisors were prepared to receive posts. Samples were divided into four groups depending on whether they had been reconstructed with LuxaCam® PEEK, Enamic®, Numerys GF® or LuxaPost®. Samples were submitted to an oblique compressive test and results were statistically analyzed with ANOVA and Student's tests (or non-parametric tests depending on the conditions). Glass fiber posts and Numerys GF® reveal a significantly higher fracture resistance than LuxaCam® PEEK and Enamic®. No exclusively dental fracture has been noted for the Enamic group, which significantly distinguishes these samples from the three other groups. In our study, it appears that the conception of posts and cores with hybrid ceramic never conducts to a unique tooth fracture. By weighting the results according to the materials used, our data, obtained for the first time on this type of PEEK block, cannot confirm the possibility of using PEEK for inlay-core conception, excepted for specific cases when the material is considered in a patient presenting allergies or systemic disease contraindicating resin or metal.
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Affiliation(s)
- Kévin Rakotoaridina
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Julien Delrieu
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Paul Pages
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Thierry Vergé
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Karim Nasr
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
| | - Thibault Canceill
- Département Odontologie, Faculté de Santé, Hôpitaux de Toulouse, Université Paul Sabatier, 3 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
- CNRS UMR 5085, INPT, Faculté de Pharmacie, CIRIMAT, Université Toulouse III Paul Sabatier, 35 Chemin des Maraichers, 31062 Toulouse Cedex 9, France
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Ahmad SM, Dawood SN, Dalloo GAM, Al-Barazanchi TRH. Evaluation of mechanical properties of different polyetheretherketone endodontic post systems: an in vitro study. BMC Oral Health 2023; 23:537. [PMID: 37542242 PMCID: PMC10401823 DOI: 10.1186/s12903-023-03193-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/30/2023] [Indexed: 08/06/2023] Open
Abstract
BACKGROUND Survival of endodontically treated teeth depends on an efficient restoration of the missing tooth structure. OBJECTIVES This study aimed to investigate the mechanical properties of different endodontic post systems. MATERIALS AND METHODS Human permanent maxillary central incisors (no.=58) were decoronated and root-filled. The specimens with prepared root canals were randomly divided into Group P: Polyether Ether Ketone (PEEK) post and composite core and Group C: custom-made post-core of PEEK. The cementation of the posts was carried out using self-adhesive resin cement. Nano-hybrid composite resin was used for core fabrication. After cementation, the specimens from each group were randomly divided into two subgroups according to the types of tests utilized: 14 from each group were for the fracture strength test, which was restored with IPS e-max CAD crown, and 15 from each group for the pullout resistance test. A universal testing machine was used for the test performance. RESULTS The fracture resistance test showed that the values significantly differed among tested posts (P = 0.013). Group P showed the highest fracture resistance. Group C exhibited higher mean pullout resistance values than the other group (P) (P = 0.059). In the two-piece PEEK post and composite core, the predominant type of failure was a core fracture, while in the one-piece PEEK post-core, most types of failures were either in the crown or in the post. CONCLUSIONS The prefabricated posts are more resistant to fracture than the custom-made posts, with fracture and displacement mainly of the core. In contrast, both showed similar pullout resistance.
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Affiliation(s)
- Shawbo Muhamd Ahmad
- Department of Conservative Dentistry, College of Dentistry, University of Sulaimani, Sulaimaniyah, 0046, Iraq
| | - Shilan Nawzad Dawood
- Department of Conservative Dentistry, College of Dentistry, University of Sulaimani, Sulaimaniyah, 0046, Iraq
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Erjavec AK, Črešnar KP, Švab I, Vuherer T, Žigon M, Brunčko M. Determination of Shear Bond Strength between PEEK Composites and Veneering Composites for the Production of Dental Restorations. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093286. [PMID: 37176168 PMCID: PMC10178894 DOI: 10.3390/ma16093286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023]
Abstract
We studied the shear bond strength (SBS) of two PEEK composites (BioHPP, BioHPP plus) with three veneering composites: Visio.lign, SR Nexco and VITA VM LC, depending on the surface treatment: untreated, sandblasted with 110 μm Al2O3, sandblasted and cleaned ultrasonically in 80% ethanol, with or without adhesive Visio.link, with applied Visio.link and MKZ primer. For the BioHPP plus, differential scanning calorimetry (DSC) revealed a slightly lower glass transition temperature (Tg 150.4 ± 0.4 °C) and higher melting temperature (Tm 339.4 ± 0.6 °C) than those of BioHPP (Tg 151.3 ± 1.3 °C, Tm 338.7 ± 0.2 °C). The dynamical mechanical analysis (DMA) revealed a slightly higher storage modulus of BioHPP (E' 4.258 ± 0.093 GPa) than of BioHPP plus (E' 4.193 ± 0.09 GPa). The roughness was the highest for the untreated BioHPP plus, and the lowest for the polished BioHPP. The highest hydrophobicity was achieved on the sandblasted BioHPP plus, whereas the highest hydrophilicity was found on the untreated BioHPP. The highest SBSs were determined for BioHPP and Visio.lign, adhesive Visio.link (26.31 ± 4.17 MPa) or MKZ primer (25.59 ± 3.17 MPa), with VITA VM LC, MKZ primer and Visio.link (25.51 ± 1.94 MPa), and ultrasonically cleaned, with Visio.link (26.28 ± 2.94 MPa). For BioHPP plus, the highest SBS was determined for a sandblasted surface, cleaned ultrasonically, with the SR Nexco and Visio.link (23.39 ± 2.80 MPa).
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Affiliation(s)
| | - Klementina Pušnik Črešnar
- Faculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, Slovenia
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Iztok Švab
- Isokon d.o.o., Industrijska cesta 16, 3210 Slovenske Konjice, Slovenia
| | - Tomaž Vuherer
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Majda Žigon
- Faculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, Slovenia
| | - Mihael Brunčko
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
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Kole S, Ergun G. Bond strength of various post-core restorations with different lengths and diameters following cycle loading. J Mech Behav Biomed Mater 2023; 142:105804. [PMID: 37062099 DOI: 10.1016/j.jmbbm.2023.105804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/20/2023] [Accepted: 03/23/2023] [Indexed: 04/18/2023]
Abstract
PURPOSE This in vitro study aims to evaluate the bonding strengths of Polyether ether ketone (PEEK), Polyether ketone (PEKK), Fiber, and Zirconia (ZrO2) post-core restorations with posts in different diameter and length following chewing simulator. MATERIALS AND METHODS Endodontic treatment was performed on 256 intact maxillary central teeth. The test specimens were prepared in four groups according to the types of materials: Glass fiber post-composite core (FB-n:64), Zirconia post-core (Zr-n:64), PEEK post-core (PE-n:64), and PEKK post-core (PK-n:64). The groups were divided into four subgroups according to diameter and length (n:16): Group 1: 10 mm length 1.75 mm diameter, Group 2: 10 mm length 1.5 mm diameter, Group 3: 7 mm length 1.75 mm diameter, Group 4: 7 mm length 1.5 mm diameter. Custom PEKK, PEEK, Zirconia post-cores, and Zirconia crowns were milled on the CAD/CAM. The post-cores and crowns were cemented to the teeth with dual-cure resin cement. After that, all subgroups were divided into control and cyclic loading groups. During the cycling, the control test group was kept in distilled water at 37±1oC before the push-out test. Half of the specimens were loaded with 250,000 cycles and 50 N with a chewing simulator. All test specimens had 1.5 mm sections taken from their roots. Then, the push-out test was applied to these sections for bond strength. Data were analyzed by Mann-Whitney U test, Shapiro-Wilk, Kruskal-Wallis's test, and Chi-Square. The statistical significance level was determined as 0.05. RESULTS The bond strength of all test groups decreased after the cycling loading. The bond strength values of zirconia posts showed a statistically significant difference (p < 0.05). The 10 mm length 1.75 mm diameter posts made of Zirconium had the highest bond strength observed in all control and cyclic loading groups of test specimens (9.74 MPa-6.25 MPa). The PEEK test specimens with a 7 mm length and 1.75 mm diameter showed the weakest bond strength in all control and cyclic loading groups (5.44 MPa-3.37 MPa). The average of the cervical region's bond strength values was statistically significantly higher than the apical region (p < 0.05). CONCLUSION Within the limitations of this study, one-piece custom-milled Zirconia post-cores appear promising, as they perform well under functional forces, especially in the anterior region. In addition, custom-milled PEKK post-cores might be considered a suitable alternative to prefabricated fiber-reinforced posts.
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Affiliation(s)
- Serife Kole
- , Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
| | - Gulfem Ergun
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
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Saisho H, Marcolina G, Perucelli F, Goulart da Costa R, Machado de Souza E, Rached RN. Fracture strength, pull-out bond strength, and volume of luting agent of tooth-colored CAD-CAM post-and-cores. J Prosthet Dent 2022; 129:599-606. [PMID: 36127164 DOI: 10.1016/j.prosdent.2022.06.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 11/18/2022]
Abstract
STATEMENT OF PROBLEM Little is known about the fracture strength, retention, and adaptation of post-and-cores fabricated with novel tooth-colored materials by computer-aided design and computer-aided manufacturing (CAD-CAM). PURPOSE The purpose of this in vitro study was to investigate the fracture strength, pull-out bond strength (POBS), and volume of luting agent of endodontically treated premolars restored with post-and-cores milled from different CAD-CAM materials. MATERIAL AND METHODS Post spaces were prepared in 80 human premolars in which post-and-cores fabricated with polyetheretherketone (PK; Ceramill PEEK), nanohybrid composite resin (BB; Brava Block), polymer-infiltrated ceramic (EN; VITA Enamic), and fiber-reinforced epoxy resin (GF; Fiber Cad Post & Core) CAD-CAM materials were luted (n=20). All specimens were subjected to thermal aging (3000 cycles at 5 °C and 55 °C with a 20-second dwell time). Half of the specimens were subjected to mechanical fatigue (250 000 cycles at 5 Hz) before fracture strength testing, while the other half was submitted to POBS testing and volume of luting agent measurement. Fracture strength data were analyzed by 1-way ANOVA, while POBS and volume of luting agent data were submitted to Kruskal-Wallis followed by the Bonferroni-Dunn multiple comparison tests. The correlation between POBS and the volume of luting agent was determined by the Spearman test (α=.05). RESULTS POBS of GF was significantly higher than that for PK (P<.001); however, failure load (P=.160) and volume of luting agent (P=.390) values did not differ. EN showed the highest percentage of catastrophic failures (20%), while PK exhibited only core deformations. POBS and cement film volume were not significantly correlated (P>.05). CONCLUSIONS Different CAD-CAM materials did not influence the fracture strength and volume of luting agent of post-and-cores. Post-and-cores made with PEEK blocks showed lower bond strength to intracanal dentin than those made with fiber-reinforced epoxy resin blocks. No significant correlation was found between bond strength and the volume of luting agent.
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Affiliation(s)
- Hiromi Saisho
- Master's student, Graduate Program in Dentistry, School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Gabriela Marcolina
- Predoctoral student, Dental Course, School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Fabricio Perucelli
- Master's Student, Graduate Program in Dentistry, School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Rogério Goulart da Costa
- Professor, Dental Prosthesis Course, Federal Institute of Paraná (IFPR), Curitiba, PR, Brazil; Professor, Graduate Program in Dentistry, School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Evelise Machado de Souza
- Professor, Graduate Program in Dentistry, School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil
| | - Rodrigo Nunes Rached
- Professor, Graduate Program in Dentistry, School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil.
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Abdelfattah Mohamed AM, El Homossany MEMB, Abdelmoniem SM, Abdelrahman TY. Comparison of tensile bond strength of ball attachments made of different materials to root canal dentin after chewing simulation. BMC Oral Health 2022; 22:254. [PMID: 35751090 PMCID: PMC9229525 DOI: 10.1186/s12903-022-02282-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/10/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Debonding of ball attachments is one of the complications that annoy teeth supported overdenture wearers. The polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) polymers are widely applied in the dental field. The purpose of the current study was to compare the tensile bond strength of ball attachments made of such materials and the commonly used titanium ones after 5 years of overdenture insertion and removal (5000 cycles) in addition to chewing simulation (1,200,000 cycle). METHODS Extracted mandibular canines (N = 60) were randomly allocated into three groups and received ball attachments; titanium (group TI; N = 20), PEEK (group PE; N = 20), PEKK (group PK; N = 20). In each group, the samples were divided into two subgroups whereas tensile bond strength was measured pre aging (T0; n = 10) and post aging (T1; n = 10). Tensile bond strength was measured by the Pull out test using the Universal testing machine. Failure mode analysis was determined by examination of the samples' surfaces under 65X stereomicroscope. The resulting data followed normal distribution and the significance level was set at (α = 0.05). RESULTS One Way Anova showed statistically significant difference between the three groups (P < .00001). PostHoc Tukey test showed statistically significant difference between the groups TI and PE, TI and PK and no statistically significant difference between the groups PE and PK. Paired t test showed statistically significant difference in the tensile bond strength pre and post aging in each group. CONCLUSIONS PEEK and PEKK ball attachments could be concluded to have a higher tensile bond strength compared to the titanium ones when bonded to root dentin. Tensile bond strength of such attachments may decrease with aging as well. Clinically, the higher tensile bond strength may have a lesser rate of debonding and thus reduced patient apprehension.
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Affiliation(s)
- Ahmed Mostafa Abdelfattah Mohamed
- Oral and Maxilofacial Prosthodontics Department, Faculty of Dentistry, AinShams University, Organization of African Unity Street, Cairo, 11561, Egypt.
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11
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Hallak AG, Caldas RA, Silva ID, Miranda ME, Brandt WC, Vitti RP. Stress distribution in restorations with glass fiber and polyetheretherketone intraradicular posts: An in silico analysis. Dent Mater J 2022; 41:376-381. [PMID: 35135940 DOI: 10.4012/dmj.2021-245] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated stresses generated at maxillary central incisor (21) root restored with lithium disilicate crown (LDC), and glass fiber (GFP) or polyetheretherketone (PEEK) post. 3D models created by computed tomographic image (i-CAT Cone Beam 3D Dental Imaging System) reproduced maxillary central incisor. Each model had prosthetic LDCs (2.0 mm thick) cemented to GFP or PEEK posts with dual resin cement. Different loads were applied to each model (cervical, incisal, axial, middle). At maximum principal stress, PEEK showed higher stress than GFP in all loads, but with qualitative similarity. At minimum principal stress, PEEK and GFP showed qualitative and quantitative similarities, except axial load. Maxillary central incisor restored with GFP or PEEK and LDC presented, in general, similar stress intensity and distribution for main occlusal loads. Only two of sixteen occlusal loads tested (cervical for maximum principal; axial for minimum principal) showed significant quantitative difference.
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12
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Peng TY, Shih YH, Hsia SM, Wang TH, Li PJ, Lin DJ, Sun KT, Chiu KC, Shieh TM. In Vitro Assessment of the Cell Metabolic Activity, Cytotoxicity, Cell Attachment, and Inflammatory Reaction of Human Oral Fibroblasts on Polyetheretherketone (PEEK) Implant-Abutment. Polymers (Basel) 2021; 13:polym13172995. [PMID: 34503035 PMCID: PMC8433877 DOI: 10.3390/polym13172995] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 08/28/2021] [Accepted: 08/31/2021] [Indexed: 12/03/2022] Open
Abstract
The purpose of this research is to compare the cytotoxicity of polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) with conventional dental implant–abutment materials, namely titanium alloy (Ti-6Al-4V) and yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), to evaluate the cell metabolic activity, cytotoxicity, and inflammation potential of human oral fibroblasts (HOF) on these materials. Disk-shaped specimens were designed and prepared via a dental computer-aided manufacturing technology system. Surface topography, roughness, and free energy were investigated by atomic force microscope and contact angle analyzer; cell metabolic activity and cytotoxicity by MTT assay; and morphological changes by scanning electron microscopy (SEM). The effect of pro-inflammatory gene expression was evaluated by RT-qPCR. The obtained data were analyzed with one-way analysis of variance and post-hoc Tukey’s honest significant difference tests. PEEK and PEKK exhibited higher submicron surface roughness (0.04 μm) and hydrophobicity (>80°) than the control. Although the cell activity of PEEK was lower than that of Ti-6Al-4V and Y-TZP for the first 24 h (p < 0.05), after 48 h there was no difference (p > 0.05). According to the cell cytotoxicity and the pro-inflammatory cytokine gene expression assays, there was no difference between the materials (p > 0.05). SEM observations indicated that HOF adhered poorly to PEKK but properly to Ti-6Al-4V, Y-TZP, and PEEK. PEEK and PEKK show comparable epithelial biological responses to Ti-6Al-4V and Y-TZP as implant–abutment materials. Between the two polymeric materials, the PEEK surface, where the HOF showed better cell metabolic activity and cytotoxicity, was a more promising implant–abutment material.
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Affiliation(s)
- Tzu-Yu Peng
- School of Dentistry, College of Dentistry, China Medical University, Taichung 40402, Taiwan; (T.-Y.P.); (P.-J.L.); (D.-J.L.); (K.-T.S.)
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Yin-Hwa Shih
- Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taichung 41354, Taiwan;
| | - Shih-Min Hsia
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 11031, Taiwan;
| | - Tong-Hong Wang
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan;
| | - Po-Jung Li
- School of Dentistry, College of Dentistry, China Medical University, Taichung 40402, Taiwan; (T.-Y.P.); (P.-J.L.); (D.-J.L.); (K.-T.S.)
| | - Dan-Jae Lin
- School of Dentistry, College of Dentistry, China Medical University, Taichung 40402, Taiwan; (T.-Y.P.); (P.-J.L.); (D.-J.L.); (K.-T.S.)
| | - Kuo-Ting Sun
- School of Dentistry, College of Dentistry, China Medical University, Taichung 40402, Taiwan; (T.-Y.P.); (P.-J.L.); (D.-J.L.); (K.-T.S.)
| | - Kuo-Chou Chiu
- Division of Oral Diagnosis and Family Dentistry, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan; or
| | - Tzong-Ming Shieh
- School of Dentistry, College of Dentistry, China Medical University, Taichung 40402, Taiwan; (T.-Y.P.); (P.-J.L.); (D.-J.L.); (K.-T.S.)
- Correspondence: ; Tel.: +886-4-2205-3366 (ext. 2316)
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Ozkan Ata S, Akay C, Ata N. Evaluation of bond strength of polyether ether ketone (PEEK) to composite resin on hypobaric and hyperbaric conditions. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1960343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Secil Ozkan Ata
- Department of Prosthodontics, Oral and Dental Health Hospital, Eskisehir, Turkey
| | - Canan Akay
- Department of Prosthodontics, Faculty of Dentistry, Eskişehir Osmangazi University, Eskisehir, Turkey
- Advanced Material Technologies Application and Research Center, Osmangazi University, Eskisehir, Turkey
- Translational Medicine Research and Clinical Center, Osmangazi University, Eskisehir, Turkey
| | - Nazim Ata
- Aeromedical Research and Training Center, Eskisehir, Turkey
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14
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Wong KI, Zhong Y, Li D, Cheng Z, Yu Z, Wei M. Modified porous microstructure for improving bone compatibility of poly-ether-ether-ketone. J Mech Behav Biomed Mater 2021; 120:104541. [PMID: 34062372 DOI: 10.1016/j.jmbbm.2021.104541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 04/14/2021] [Accepted: 04/16/2021] [Indexed: 10/21/2022]
Abstract
Poly-ether-ether-ketone (PEEK) has been the promising implantation material since it was first applied in the medical field in the 1990s. With its irreplaceable advantages, such as high mechanical and biological properties, human-like tensile strength and elastic modulus, and excellent physical and chemical stability, PEEK has been regarded as an excellent implantation material, and has been widely used in orthopedics, reconstructive surgery, and dentistry. However, PEEK also has an obvious shortcoming of poor bone compatibility due to its inherent hydrophobicity and bio-inertia, which is a great challenge for its prospect. In the present study, based on the acknowledged fact that enhancing the roughness of PEEK can improve its bone compatibility, modified porous PEEK implants with different porosities (40%, 50%, 60% and solid) were fabricated by Fused Deposition Modeling (FDM), and experiments in vitro and in vivo were conducted to determine whether the bone compatibility can be improved, and compare the biological properties between different porosities. These results indicate that both in vitro and in vivo, the bone compatibility of the modified porous PEEK has been strongly improved, when compared to the control group (solid PEEK implants). In vitro and in vivo, the 40%-porosity-PEEK possessed the highest bone compatibility.
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Affiliation(s)
- Ka Ioi Wong
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, China
| | - Yehong Zhong
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, China
| | - Dong Li
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, China
| | - Zhihua Cheng
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, China
| | - Zheyuan Yu
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, China.
| | - Min Wei
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, China.
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Attia MA, Shokry TE, Abdel-Aziz M. Effect of different surface treatments on the bond strength of milled polyetheretherketone posts. J Prosthet Dent 2021; 127:866-874. [PMID: 33495042 DOI: 10.1016/j.prosdent.2020.08.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/08/2020] [Accepted: 08/10/2020] [Indexed: 12/01/2022]
Abstract
STATEMENT OF PROBLEM Polyetheretherketone (PEEK) can be used as a framework material for removable and fixed dental prostheses. However, information about the use of PEEK as a post-and-core restoration is scarce. PURPOSE The purpose of this in vitro study was to evaluate the effect of different surface treatments on the push-out bond strength of milled polyetheretherketone posts to resin cement. MATERIAL AND METHODS Sixty intact human maxillary central incisors were selected and endodontically treated, and standardized post spaces were prepared. Sixty PEEK posts were milled from a prefabricated PEEK blank by using a computer-aided design and computer-aided manufacturing (CAD-CAM) system and divided into 3 groups (n=15) according to the surface treatment: acid etching by using 98% sulfuric acid (AE); airborne-particle abrasion by using 50-μm Al2O3 (AA); nonthermal plasma treatment (NTP); in addition, PEEK posts (n=15) received no treatment (NT) and served as a control. All posts were bonded by using a self-adhesive resin cement. Three sections (coronal, middle, and apical) were obtained for each specimen. Push-out bond strength measurements (MPa) for each section were recorded by using a universal testing machine at a crosshead speed of 0.5 mm/min until failure occurred. The post-cement interfaces and failure modes were evaluated by using scanning electron microscopy. The data obtained were statistically analyzed by using 1-way ANOVA and the pair-wise Tukey (HSD) test to study the difference between group mean values (α=.05). RESULTS The overall mean ±standard deviation of the push-out bond strength was 11 ±2 MPa for AE group, 6 ±1 MPa for AA group, 5 ±1 MPa for NTP group, and 3 ±1 MPa for NT group. A statistically significant difference was found among all groups subjected to different surface treatments as indicated by the ANOVA test (P<.001). The pair-wise Tukey honestly significant difference (HSD) test showed a significant difference among the AE group and all groups (P<.001); however, no significant difference was observed between the AA and NTP groups (P>.05). Moreover, a significant difference was observed among all root sections (P<.001). CONCLUSIONS Surface treatment of PEEK posts with 98% sulfuric acid for 60 seconds showed significantly higher bond strength values than those in other groups. The bond strength of PEEK posts to resin cement was significantly higher in the coronal section than that in other sections.
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Affiliation(s)
- Mazen A Attia
- Associate Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Beni-Suef University, Beni-Suef, Egypt.
| | - Tamer E Shokry
- Professor, Department of Fixed Prosthodontics, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt
| | - Mohamed Abdel-Aziz
- Associate Professor, Department of Fixed Prosthodontics, Faculty of Dental Surgery, Ahram Canadian University, Cairo, Egypt
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Review on Development and Dental Applications of Polyetheretherketone-Based Biomaterials and Restorations. MATERIALS 2021; 14:ma14020408. [PMID: 33467576 PMCID: PMC7830426 DOI: 10.3390/ma14020408] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/10/2021] [Accepted: 01/12/2021] [Indexed: 12/15/2022]
Abstract
Polyetheretherketone (PEEK) is an important high-performance thermoplastic. Its excellent strength, stiffness, toughness, fatigue resistance, biocompatibility, chemical stability and radiolucency have made PEEK attractive in dental and orthopedic applications. However, PEEK has an inherently hydrophobic and chemically inert surface, which has restricted its widespread use in clinical applications, especially in bonding with dental resin composites. Cutting edge research on novel methods to improve PEEK applications in dentistry, including oral implant, prosthodontics and orthodontics, is reviewed in this article. In addition, this article also discusses innovative surface modifications of PEEK, which are a focus area of active investigations. Furthermore, this article also discusses the necessary future studies and clinical trials for the use of PEEK in the human oral environment to investigate its feasibility and long-term performance.
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Liu C, Bai J, Wang Y, Chen L, Wang D, Ni S, Liu H. The effects of three cold plasma treatments on the osteogenic activity and antibacterial property of PEEK. Dent Mater 2021; 37:81-93. [DOI: 10.1016/j.dental.2020.10.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 09/11/2020] [Accepted: 10/06/2020] [Indexed: 11/16/2022]
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Retentive Characteristics of a Polyetheretherketone Post-Core Restoration with Polyvinylsiloxane Attachments. Polymers (Basel) 2020; 12:polym12092005. [PMID: 32899168 PMCID: PMC7563112 DOI: 10.3390/polym12092005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/28/2020] [Accepted: 08/29/2020] [Indexed: 12/22/2022] Open
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.
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Papathanasiou I, Kamposiora P, Papavasiliou G, Ferrari M. The use of PEEK in digital prosthodontics: A narrative review. BMC Oral Health 2020; 20:217. [PMID: 32741366 PMCID: PMC7398079 DOI: 10.1186/s12903-020-01202-7] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023] Open
Abstract
Background Advanced computer-aided design and computer-aided manufacturing (CAD-CAM) technology led to the introduction of an increasing number of machinable materials suitable for dental prostheses. One of these materials is polyetheretherketone (PEEK), a high performance polymer recently used in dentistry with favorable physical, mechanical and chemical properties. The purpose of this study was to review the current published literature on the use of PEEK for the fabrication of dental prostheses with CAD-CAM techniques. Methods Electronic database searches were performed using the terms “PEEK”, “CAD-CAM”, “dental”, “dentistry” to identify studies related to the use of PEEK for the fabrication of CAD-CAM prostheses. The search period spanned from January 1990 through February 2020. Both in vivo and in vitro studies in English were eligible. Review articles and the references of the included publications were searched to identify relevant articles. Results A great number of in vitro studies are available in the current literature pointing out the noticeable properties of PEEK. The use of PEEK has been recommended for a wide range of CAD-CAM fabricated fixed and removable dental prostheses. PEEK was additionally recommended for occlusal splints, intra-radicular posts, implant abutments, customized healing abutments and provisional restorations. However, only a few clinical studies were identified. Conclusions PEEK could be considered as a viable alternative for CAD-CAM fixed and removable dental prostheses to well-established dental materials. Due to the scarcity of clinical data, clinical trials are needed to assess the long-term performance of PEEK prostheses.
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Affiliation(s)
- Ioannis Papathanasiou
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Phophi Kamposiora
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece.
| | - George Papavasiliou
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Marco Ferrari
- Department of Prosthodontics and Dental Materials, School of Dental Medicine, University of Siena, Siena, Italy
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