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Menini M, Delucchi F, Bagnasco F, Baldi D, Canullo L, Setti P, Migliorati M, Simetti E, Pesce P. Shock Absorption Capacity of High-Performance Polymers for Dental Implant-Supported Restorations: In Vitro Study. Dent J (Basel) 2024; 12:111. [PMID: 38668023 PMCID: PMC11048904 DOI: 10.3390/dj12040111] [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: 01/23/2024] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Restorative materials might significantly affect load transmission in peri-implant bone. The aim of the present study is to evaluate the shock absorption capacity of two different polymeric materials to be used for implant-supported prostheses. METHODS A masticatory robot was used to compare the shock absorption capacity of veneered and non-veneered polyetherketoneketone (PEKK), Pekkton®ivory (Cendres+Mètaux), and the glass fiber-reinforced composite (GFRC), TRINIATM (Bicon). Five identical sample crowns for each of the three groups were tested. Forces transmitted at the simulated peri-implant bone were recorded and statistically analyzed. RESULTS The statistical analysis of forces transmitted at the simulated dental implant revealed significant differences between the materials tested and between these materials and zirconia, glass ceramic, composite resin, and acrylic resin. Only differences between PEKK and veneered PEKK and between PEKK and one of the previously tested composite resins were not statistically significant. PEKK samples demonstrated significantly greater shock absorption capacity compared to GFRC. CONCLUSIONS PEKK revealed optimal shock absorption capacity. Further studies are needed to evaluate its efficacy in the case of long-span prostheses with reduced prosthetic volume.
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Affiliation(s)
- Maria Menini
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy; (F.D.); (F.B.); (D.B.); (L.C.); (P.P.)
| | - Francesca Delucchi
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy; (F.D.); (F.B.); (D.B.); (L.C.); (P.P.)
| | - Francesco Bagnasco
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy; (F.D.); (F.B.); (D.B.); (L.C.); (P.P.)
| | - Domenico Baldi
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy; (F.D.); (F.B.); (D.B.); (L.C.); (P.P.)
| | - Luigi Canullo
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy; (F.D.); (F.B.); (D.B.); (L.C.); (P.P.)
| | | | - Marco Migliorati
- Orthodontic Division, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy;
| | - Enrico Simetti
- Department of Informatics, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genova, 16132 Genova, Italy
| | - Paolo Pesce
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genova, 16132 Genova, Italy; (F.D.); (F.B.); (D.B.); (L.C.); (P.P.)
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Ghanem N, Ali H, Bahrli N, Hassan H. Clinical performance of custom-milled polyetherketoneketone (PEKK) posts and cores: A 12-month follow-up randomized controlled pilot study. Clin Exp Dent Res 2024; 10:e854. [PMID: 38433309 PMCID: PMC10909799 DOI: 10.1002/cre2.854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/12/2023] [Accepted: 01/26/2024] [Indexed: 03/05/2024] Open
Abstract
OBJECTIVES Comparing the survival rate and the cumulative success rates of custom-milled polyetherketone ketone posts and cores (MPP) with prefabricated fiber posts (PFP) in restoring compromised endodontically treated premolars. MATERIAL AND METHODS This was a randomized, double-blind, parallel, two-arm controlled pilot study. A total of 24 patients (12 males, 12 females), each had a compromised lower premolar, needed a root canal treatment and to be restored with post and core. Patients were randomly allocated into two groups, MPP-group: restored with MPP, and PFP-group: restored with PFP and composite cores. After that, premolars were restored with single porcelain fused to metal (PFM) crowns. Clinical and radiographic follow-ups were conducted after 3, 6, and 12 months. The Kaplan-Meier, log-Rank, and χ2 tests were used to investigate differences between the two groups at the 0.05 significance level. RESULTS The survival rate after 12 months in the MPP and PFP groups was 66.7% and 100%, respectively. Meanwhile, the cumulative success rates were 63.6% and 100% in the same order. The log-rank test showed a significant difference between the two groups (p = .031). The difference in cumulative success rates was also significant, as the χ2 test revealed (p = .011). CONCLUSION The PFP group showed a higher success rate than the MPP group and according to the failure types, PEKK posts seem to be inferior to PFP in terms of the mechanical properties and bonding to resin mechanism. TRIAL REGISTRATION ISRCTN, ISRCTN13456471. October, 14, 2019. (https://doi.org/10.1186/ISRCTN13456471ISRCTN13456471).
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Affiliation(s)
- Naif Ghanem
- Department of Fixed Prosthodontics, Faculty of DentistryTishreen UniversityLatakiaSyria
| | - Hasan Ali
- Department of Pediatric Dentistry, Faculty of DentistryTishreen UniversityLatakiaSyria
| | - Nasser Bahrli
- Department of Fixed Prosthodontics, Faculty of DentistryTishreen UniversityLatakiaSyria
| | - Hazem Hassan
- Department of Orthodontics, Faculty of DentistryTishreen UniversityLatakiaSyria
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Kermanshah H, Estedlal T. Restoring an Extremely Destructed Tooth with Flared Root Canal Walls: A Case Report. Front Dent 2024; 21:3. [PMID: 38571899 PMCID: PMC10985509 DOI: 10.18502/fid.v21i3.14760] [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: 11/30/2022] [Accepted: 07/01/2023] [Indexed: 04/05/2024] Open
Abstract
Reconstructing severely damaged teeth has always presented a challenge when the remaining crown structure is limited, often requiring retention from the root canal using intracanal posts. However, the real challenge is when the root canal walls are also weak, and there is a high risk of vertical root fracture due to the wedging forces of a rigid post. This case report presents a tooth with extremely flared (0.3mm) root canal walls, successfully restored with a newly introduced polymer made of polyether ether ketone (PEEK), with one-year follow-up. Due to its close elastic modulus to dentin, capacity to bond effectively to tooth structure, shock-absorbing properties, and thereby facilitating favorable stress distribution, utilizing this material for an intracanal post has the potential to mitigate the risk of fractures often associated with cast metal posts. It combines the good fitness of cast posts with the low modulus of elasticity and optical properties of prefabricated fiber posts.
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Affiliation(s)
- Hamid Kermanshah
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Taraneh Estedlal
- Department of Restorative Dentistry, School of Dentistry, Alborz University of Medical Sciences, Karaj, Iran
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Abbas MH, Elerian FA, Elsherbiny AA, Elgohary NMM, Atout A. Influence of occlusal reduction design on the fracture resistance and biomechanical behavior of endocrowns restoring maxillary premolars. BMC Oral Health 2024; 24:113. [PMID: 38243249 PMCID: PMC10799380 DOI: 10.1186/s12903-023-03688-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 11/21/2023] [Indexed: 01/21/2024] Open
Abstract
PURPOSE To investigate the effect of different occlusal reduction design on stress distribution and fracture resistance of different endocrown systems. MATERIAL AND METHODS Sixty-four maxillary human premolars with endodontic treatment, prepared for endocrowns were divided into 2 groups (n = 32) according to the occlusal design: Butt joint preparation (B group) and Anatomical preparation (A group). Each group were subdivided into four groups according to ceramic systems: IPS E max CAD (EM group), monolithic zirconia (ZR group), Nacera Hyprid (NH group) and PEKKTON (PE group). After manufacturing of endocrowns and adhesive bonding the specimens were thermomechanically loaded and subsequently they were tested in a universal testing machine for evaluating the fracture resistance. The specimens failure mode was qualitatively assessed. The stress distribution in each group was assessed using three-dimensional finite element analysis (FEA). 1-way ANOVA and the Post Hoc Tukey HSD test were used to evaluate the data (a = .05). RESULTS The fracture resistance values between the groups showed statistically significant variations. The B PE and A PE groups had a higher ratio of fracture resistance values. Regarding failure mode, ceramic endocrowns recorded mainly irreparable failures. FEA showed that anatomical occlusal preparation have reduced the stress concentration under all endocrown systems. CONCLUSION Endocrowns could be used to restore endodontically treated maxillary premolars. PEKKTON endocrowns with anatomical preparations revealed most appropriate restoration. The tested new endocrown systems enhanced the biomechanical performance of the tooth. CLINICAL SIGNIFICANCE The innovative endocrown systems (PEKK, Nacera Hyprid) can be seen as a promising choice for restoration of severely-destructed endodontic treated premolars, with less stress transmit to the residual tooth structure. Although the traditional endocrown technology might increase the longevity of tooth bonding, it shouldn't be used for clenching cases since the risk of failure is too great overall.
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Affiliation(s)
- Mahy Hassouna Abbas
- Fixed Prosthodontics Dept, Faculty of Dentistry, Mansoura University and Delta University for Science and Technology, Mansoura, Egypt.
| | - Fatma Abdallah Elerian
- Department of Mechanical Engineering, College of Engineering, University of Bisha, P.O. Box 001, Bisha, 67714, Saudi Arabia
- Mansoura University, Mansoura, Egypt
| | - Abdallah Ahmed Elsherbiny
- Production Engineering and Mechanical Design Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt
| | | | - Abeer Atout
- Department of prosthetic dental sciences , College of Dentistry, Jazan University, KSA and Fixed Prosthodontics Dept, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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Gontijo IG, Ferretti MA, Caldas RA, Pecorari VGA, França FMG, Oliveira LKN, Aguiar FHB. Biomechanical behavior of weakened roots restored with custom-made post-and-cores of glass fiber and polyetheretherketone. J Prosthodont 2023; 32:807-814. [PMID: 36482016 DOI: 10.1111/jopr.13628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/14/2022] Open
Abstract
PURPOSE To evaluate the influence of post type and mechanical aging on compression force resistance, fracture pattern, and stress distribution in weakened roots. MATERIALS AND METHODS Bovine roots were endodontically treated and widened-and randomly divided into 8 groups (n = 10) according to post type (prefabricated glass fiber post and customized anatomic glass fiber post, milled glass fiber post-and-core, and milled polyetheretherketone post-and-core) and mechanical aging (without and with mechanical aging). Three hundred thousand cycles of mechanical fatigue were performed and compression force resistance (N) was analyzed by two-way ANOVA and Tukey test (α = 0.05). Fracture patterns were reported and stress distribution was analyzed by finite elements analysis. RESULTS There was a significant effect of post type (p = 0.032) and mechanical aging (p = 0.009), but no double interaction (p = 0.879). Higher values were recorded in the milled glass fiber and polyetheretherketone post-and-core groups compared to the prefabricated glass fiber post groups, and no significant difference was found among anatomic glass fiber post groups and other groups. Reparable fractures were predominant in the milled glass fiber and polyetheretherketone post-and-core groups. Prefabricated glass fiber posts and milled polyetheretherketone post-and-cores showed similar stress distribution. CONCLUSIONS Post type and mechanical aging influence the compression force resistance and fracture pattern of weakened roots. Milled glass fiber and polyetheretherketone post-and-cores exhibited higher compression force resistance and more reparable fractures compared to prefabricated glass fiber posts. Prefabricated glass fiber posts and milled polyetheretherketone post-and-cores showed similar stress distribution.
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Affiliation(s)
- Isabela G Gontijo
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Marcela A Ferretti
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Ricardo A Caldas
- Department of Prosthodontics, Federal University of Santa Catarina - UFSC, Florianópolis, SC, Brazil
| | - Vanessa G A Pecorari
- Department of Dental Materials, Paulista University - UNIP, São Paulo, SP, Brazil
| | - Fabiana M G França
- Department of Restorative Dentistry, São Leopoldo Mandic School of Dentistry - SLMANDIC, Campinas, SP, Brazil
| | - Lorena K N Oliveira
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Flávio H B Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
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Dimitrova M, Vlahova A, Kalachev Y, Zlatev S, Kazakova R, Capodiferro S. Recent Advances in 3D Printing of Polymers for Application in Prosthodontics. Polymers (Basel) 2023; 15:4525. [PMID: 38231950 PMCID: PMC10708542 DOI: 10.3390/polym15234525] [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: 10/27/2023] [Revised: 11/15/2023] [Accepted: 11/22/2023] [Indexed: 01/19/2024] Open
Abstract
Contemporary mass media frequently depict 3D printing as a technology with widespread utilization in the creation of dental prosthetics. This paper endeavors to provide an evidence-based assessment of the current scope of 3D printing's integration within dental laboratories and practices. Its primary objective is to offer a systematic evaluation of the existing applications of 3D-printing technology within the realm of dental prosthetic restorations. Furthermore, this article delves into potential prospects, while also critically examining the sustained relevance of conventional dental laboratory services and manufacturing procedures. The central focus of this article is to expound upon the extent to which 3D printing is presently harnessed for crafting dental prosthetic appliances. By presenting verifiable data and factual insights, this article aspires to elucidate the actual implementation of 3D printing in prosthetic dentistry and its seamless integration into dental practices. The aim of this narrative review is twofold: firstly, to provide an informed and unbiased evaluation of the role that 3D printing currently plays within dental laboratories and practices; and secondly, to instigate contemplation on the transformative potential of this technology, both in terms of its contemporary impact and its future implications, while maintaining a balanced consideration of traditional dental approaches.
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Affiliation(s)
- Mariya Dimitrova
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (Y.K.); (S.Z.); (R.K.)
| | - Angelina Vlahova
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (Y.K.); (S.Z.); (R.K.)
- CAD/CAM Center of Dental Medicine, Research Institute, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Yavor Kalachev
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (Y.K.); (S.Z.); (R.K.)
| | - Stefan Zlatev
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (Y.K.); (S.Z.); (R.K.)
- CAD/CAM Center of Dental Medicine, Research Institute, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Rada Kazakova
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (Y.K.); (S.Z.); (R.K.)
- CAD/CAM Center of Dental Medicine, Research Institute, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Saverio Capodiferro
- Department of Interdisciplinary Medicine, Aldo Moro, University of Bari, 70100 Bari, Italy;
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Diken Turksayar AA, Donmez MB. Stress behavior of an anterior single implant restored with high-performance polymer abutments under immediate and delayed loading: A 3D FEA study. J Prosthodont 2023; 32:132-138. [PMID: 36007157 DOI: 10.1111/jopr.13598] [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: 03/31/2022] [Accepted: 08/18/2022] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To evaluate the stress generated on peripheral bone, implant, and prosthetic components while using polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) hybrid abutments in two different loading situations with nonlinear 3D finite element analysis. MATERIALS AND METHODS Standard tessellation language (STL) files of original components were used for the in-silico modeling of implant, standard titanium abutment, and hybrid abutments (PEEK and PEKK). The implant was placed in the bone block to imitate immediate loading, in which a friction coefficient of 0.3 was set between the bone and the implant interface, or delayed loading, where the bone-implant interface was assumed to be perfect. In all models, both a horizontal force (25.5 N) and a 30-degree oblique force (178 N) were applied to the long axis of the implant to the palatal surface of the restoration. The stress distribution was evaluated. RESULTS While more stress was observed in the prosthetic structures in the PEEK and PEKK models, the stresses on the implant and bone were similar in all models, regardless of the loading situation. Under immediate loading, PEEK hybrid abutments caused excessive stress accumulation on the titanium base abutment. CONCLUSIONS Even though abutment type did not affect the stresses on peripheral bone, PEEK and PEKK abutments generated greater stresses on the implant and the standard titanium abutment accumulated higher stresses. Oblique forces mostly generated greater stress than horizontal forces. Oblique forces on an immediately loaded implant led to stresses higher than the yield strength of a titanium implant when restored with PEEK hybrid abutment.
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Affiliation(s)
| | - Mustafa Borga Donmez
- Department of Prosthodontics, İstinye University, Faculty of Dentistry, İstanbul, Turkey.,Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
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Maloo LM, Toshniwal SH, Reche A, Paul P, Wanjari MB. A Sneak Peek Toward Polyaryletherketone (PAEK) Polymer: A Review. Cureus 2022; 14:e31042. [DOI: 10.7759/cureus.31042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/03/2022] [Indexed: 11/06/2022] Open
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Badami V, Ketineni H, PB S, Akarapu S, Mittapalli SP, Khan A. Comparative Evaluation of Different Post Materials on Stress Distribution in Endodontically Treated Teeth Using the Finite Element Analysis Method: A Systematic Review. Cureus 2022; 14:e29753. [PMID: 36324349 PMCID: PMC9617588 DOI: 10.7759/cureus.29753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2022] [Indexed: 11/17/2022] Open
Abstract
The aim of this systematic review is to summarize and conclude findings to reveal the stress ranges developed by various post materials by finite element analysis. This, in turn, aids in the selection of better post material clinically. The electronic databases PubMed and Google Scholar were searched in this review by using specific inclusion and exclusion criteria. Among 14586 articles, 22 articles were included in this systematic review, as they satisfied the eligibility criteria. The search covered all articles published from 1997 to December 2021. All records identified were retrieved and imported into the Rayyan bibliographic software, which is a systematic review screening software. Later, data extraction and analysis of 22 articles were done. Twenty-two articles, which were all finite element analysis studies, were included. Among these, 18 studies used maxillary central incisor scanned models, two studies used a maxillary canine model, and the remaining two used the mandibular premolar model for finite element analysis. All these tooth models are restored with post models made of different materials. This systematic review revealed a difference in stress distribution in endodontically treated teeth when using different post materials. Among 22 studies, 15 studies evaluated glass fiber posts and the results showed that they induce less stress on restored endodontically treated teeth when compared to other posts, with maximum stress concentration at the cervical third of the root. Prefabricated posts like stainless steel and Titanium showed more stress on the restored tooth structure with stress concentration at the cervical and apical third of the root. Prefabricated zirconia also showed more stress on the restored tooth with maximum stress concentration at the middle third of the root.
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Lalama M, Rocha MG, Neill EO, Zoidis P. Polyetheretherketone (PEEK) Post and Core Restorations: A 3D Accuracy Analysis between Heat-Pressed and CAD-CAM Fabrication Methods. J Prosthodont 2021; 31:537-542. [PMID: 34755428 DOI: 10.1111/jopr.13452] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2021] [Indexed: 11/29/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the accuracy of polyetheretherketone (PEEK) based post and core restorations using heat-pressed and computer-aided design and computer-aided manufacturing (CAD-CAM) methods. MATERIALS AND METHODS Post and core patterns (n=10) were fabricated using an acrylic pattern resin and each pattern was scanned to generate a resin pattern standard tessellation file (STL-R) to be used as the standard control group for the 3D profilometric analysis. The STL-R files were loaded into a computer-aided manufacturing (CAM) machine and a milling disk made of a modified PEEK-based polymer with 20% ceramic fillers was milled into post and core restorations. Each original post and core resin pattern was sprued, invested and pressed using pellets made of the same PEEK material and a PEEK pressing unit. The resulting post and core restorations from the CAD-CAM and heat-pressed methods were scanned to generate STL-M (milled) and STL-P (heat-pressed) files, respectively. STL-M and STL-P files were digitally aligned and compared to STL-R files using a 3D analysis software. The 3D spatial distribution deviation was exported, and the statistical analysis was performed using the 95% CI deviation distribution from the Gaussian function subtraction. The statistical outcome for each group was merged and a 3D color-coded map was created showing the average deviation (α = 0.05). RESULTS The heat-pressed post and core restoration showed 79 ±6 % of the areas within ±50 μm while the CAD-CAM post-and-core restoration showed 66 ±9 %. The CAD-CAM post and core restorations show 6 ±5 % of the areas above the ideal for marginal adaptation limit threshold of 200μm, while only 0.7 ±0.7 % was found for the heat-pressed. CONCLUSIONS The heat-pressed method to manufacture PEEK-based post and core restorations showed higher accuracy than the CAD-CAM method. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Martin Lalama
- Graduate Prosthodontic resident, Graduate Prosthodontics Program, University of Florida College of Dentistry, Gainesville, FL, USA
| | - Mateus Garcia Rocha
- Assistant Professor, Center for Dental Biomaterials, Division of Operative Dentistry, Department of Restorative Dental Sciences, University of Florida College of Dentistry, Gainesville, FL, USA
| | - Edgar O' Neill
- Associate Professor, Restorative Dental Sciences, Graduate Prosthodontics Program Director, University of Florida College of Dentistry, Gainesville, FL, USA
| | - Panagiotis Zoidis
- Associate Professor, Division of Prosthodontics, Associate Dean for Clinical Affairs and Quality Assurance, University of Florida College of Dentistry, Gainesville, FL, USA
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Nahar R, Mishra SK, Chowdhary R. Evaluation of stress distribution in an endodontically treated tooth restored with four different post systems and two different crowns- A finite element analysis. J Oral Biol Craniofac Res 2020; 10:719-726. [PMID: 33088703 DOI: 10.1016/j.jobcr.2020.10.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 10/05/2020] [Indexed: 11/17/2022] Open
Abstract
Aim and objectives The study evaluated the stress distribution in an endodontically treated tooth with four different post systems and restored with two different prosthetic crown materials using finite element analysis (FEA). Material and methods A total of eight 3D FEA models of maxillary central incisor were created and divided into two groups; group porcelain fused to metal (PFM) crown (n = 4) and group PEEK crown (n = 4). The endodontically treated tooth was restored using four different post materials such as fiber-reinforced composite (FRC), carbon fiber-reinforced polyetheretherketone (CFR-PEEK), glass fiber reinforced polyetheretherketone (GFR-PEEK) and polyetherketoneketone (PEKK) and composite resin core. A static load of 100 N was applied and von Mises stress was calculated. The stress ratio in dentin was analyzed by using the Mohr-Coulomb failure theory. Results In dentin, under the applied forces for both, PFM group and PEEK group, it was observed that CFR-PEEK post exhibited minimum von Mises stress while PEKK post exhibited maximum von Mises stress values. The result obtained showed that low stresses were detected using CFR-PEEK post than FRC, GFR-PEEK, and PEKK posts. Conclusion Stress observed in dentin, when CFR-PEEK post was used was lesser in comparison to the FRC post. It was noted that PEEK crown and the PFM crown showed similar effect in dentin in stress generation. Hence, PEEK crown can be used as an alternative to the PFM crown.
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Affiliation(s)
- Rajvi Nahar
- Department of Prosthodontics, People's College of Dental Sciences & Research Centre, Bhopal, 462037, India
| | - Sunil Kumar Mishra
- Department of Prosthodontics, People's College of Dental Sciences & Research Centre, Bhopal, 462037, India
| | - Ramesh Chowdhary
- Department of Prosthodontics, Rajarajeswari Dental College and Hospital, Bengaluru, Karnataka, India
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Alqurashi H, Khurshid Z, Syed AUY, Rashid Habib S, Rokaya D, Zafar MS. Polyetherketoneketone (PEKK): An emerging biomaterial for oral implants and dental prostheses. J Adv Res 2020; 28:87-95. [PMID: 33384878 PMCID: PMC7770505 DOI: 10.1016/j.jare.2020.09.004] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/29/2020] [Accepted: 09/08/2020] [Indexed: 12/16/2022] Open
Abstract
Polyetherketoneketone (PEKK) is a new evolving polymeric material. The present article comprehensively reviewed an overview of various applications of PEKK in prosthodontics and oral implantology, highlighting its prospects for clinical applications. PEKK biomaterials is an elastic material with good shock absorbance and fracture resistance and present ultra-high performance among all thermoplastic composites for excellent mechanical strength, chemical resistance, and high thermal stability. Available articles on PEKK for dental applications were reviewed from January 1957 to August 2020) using MEDLINE/PubMed, Web of Science, and ScienceDirect resources. PEKK presents suitable physical, mechanical, and chemical properties for applications in prosthodontics and oral implantology. PEKK has good potential for a wide range of dental applications, including tooth restorations, crowns, bridge, endoposts, denture framework, implant-supported fixed prosthesis, and dental implants. PEKK dental implants have shown lesser stress shielding compared to titanium for dental implant applications. Further modifications and improving material properties can result in broader applications in the field of dentistry. Long term evaluations are needed as PEKK is recently applied in dentistry, and there are limited studies published on PEKK.
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Affiliation(s)
- Hatim Alqurashi
- School of Clinical Dentistry, University of Sheffield, United Kingdom.,Department of Preventive Dental Sciences, School of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Zohaib Khurshid
- Department of Prosthodontics and Dental Implantology, College of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Azeem Ul Yaqin Syed
- Department of Prosthodontics and Dental Implantology, College of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Syed Rashid Habib
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Dinesh Rokaya
- Department of Clinical Dentistry, Walailak University International College of Dentistry, Bangkok 10400, Thailand
| | - Muhammad Sohail Zafar
- Department of Restorative Dentistry, College of Dentistry, Taibah University, Madinah Al Munawwarah, Saudi Arabia.,Department of Dental Materials, Islamic International Dental College, Riphah International University, Islamabad 44000, Pakistan
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13
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Ausiello P, Gloria A, Maietta S, Watts DC, Martorelli M. Stress Distributions for Hybrid Composite Endodontic Post Designs with and without a Ferrule: FEA Study. Polymers (Basel) 2020; 12:E1836. [PMID: 32824363 PMCID: PMC7465202 DOI: 10.3390/polym12081836] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/03/2020] [Accepted: 08/13/2020] [Indexed: 02/07/2023] Open
Abstract
The aim of the current work was to analyze the influence of the ferrule effect for hybrid composite endodontic post designs consisting of carbon (C) and glass (G) fiber-reinforced polyetherimide (PEI), in upper canine teeth. Starting from theoretical designs of C-G/PEI hybrid composite posts with different Young's moduli (Post A-57.7 GPa, Post B-31.6 GPa, Post C-graduated from 57.7 to 9.0 GPa in the coronal-apical direction) in endodontically treated anterior teeth, the influence of the ferrule effect was determined through finite element analysis (FEA). On the surface of the crown, a load of 50 N was applied at 45° to the longitudinal axis of the tooth. Maximum principal stresses were evaluated along the C-G/PEI post as well as at the interface between the surrounding tooth structure and the post. Maximum stress values were lower than those obtained for the corresponding models without a ferrule. The presence of a ferrule led to a marked decrease of stress and gradients especially for posts A and B. A less marked effect was globally found for Post C, except in a cervical margin section along a specific direction, where a significant decrease of the stress was probably due to local geometric features, compared to the model without a ferrule. The presence of a ferrule did not generally provide a marked benefit in the case of the graduated Post C, in comparison to other C-G/PEI posts. The outcomes suggest how such a hybrid composite post alone should be sufficient to optimize the stress distribution, dissipating stress from the coronal to the apical end.
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Affiliation(s)
- Pietro Ausiello
- School of Dentistry—University of Naples Federico II, 80131 Naples, Italy;
| | - Antonio Gloria
- Institute of Polymers, Composites and Biomaterials—National Research Council of Italy, 80125 Naples, Italy
| | - Saverio Maietta
- Department of Industrial Engineering, Fraunhofer JL IDEAS—University of Naples Federico II, 80125 Naples, Italy; (S.M.); (M.M.)
| | - David C. Watts
- School of Medical Sciences and Photon Science Institute, University of Manchester, Manchester M13 9PL, UK;
| | - Massimo Martorelli
- Department of Industrial Engineering, Fraunhofer JL IDEAS—University of Naples Federico II, 80125 Naples, Italy; (S.M.); (M.M.)
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14
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Bathala L, Majeti V, Rachuri N, Singh N, Gedela S. The Role of Polyether Ether Ketone (Peek) in Dentistry - A Review. J Med Life 2019; 12:5-9. [PMID: 31123518 PMCID: PMC6527406 DOI: 10.25122/jml-2019-0003] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/21/2019] [Indexed: 11/17/2022] Open
Abstract
This study is aimed to review the applications of Polyether Ether Ketone (PEEK) in dentistry. The increased demand for aesthetics, legislation in some developed countries, few drawbacks with existing materials and clinicians shifting their paradigms towards metal free restorations led space for the metal-free restorations in today's dental practice. An electronic literature search was conducted through Medline via PubMed, Wiley Online library, EBSCOhost, Science Direct, as well as the Google Scholar between January 2010 and March 2018 using the keywords: PEEK, modified PEEK, PEEK and Dental, advantages of PEEK, applications of PEEK in dentistry and PEEK Implants. A total of 103 articles were found in the literature search and out of these, 18 were not related to our study and hence were excluded. Finally, 85 articles were found to be relevant. PEEK has been explained for a number of applications in dental practice. The literature showed that the PEEK material has superior mechanical properties with different uses in various specialties of dentistry.
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Affiliation(s)
- Lakshmana Bathala
- Department of Prosthodontics, Lenora Institute of Dental Sciences, Rajahmundry, India
| | - Vaishnavi Majeti
- Department of Oral & Maxillofacial Surgery, Lenora Institute of Dental Sciences, Rajahmundry, India
| | - Narendra Rachuri
- Department of Prosthodontics, Lenora Institute of Dental Sciences, Rajahmundry, India
| | - Nibha Singh
- Department of Prosthodontics, Lenora Institute of Dental Sciences, Rajahmundry, India
| | - Sirisha Gedela
- Department of Prosthodontics, Lenora Institute of Dental Sciences, Rajahmundry, India
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15
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Labriaga W, Song SY, Park JH, Ryu JJ, Lee JY, Shin SW. Effect of non-thermal plasma on the shear bond strength of resin cements to Polyetherketoneketone (PEKK). J Adv Prosthodont 2018; 10:408-414. [PMID: 30584469 PMCID: PMC6302079 DOI: 10.4047/jap.2018.10.6.408] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 10/22/2018] [Accepted: 12/03/2018] [Indexed: 11/08/2022] Open
Abstract
PURPOSE This study aimed to assess the effect of non-thermal plasma on the shear bond strength of resin cements to polyetherketoneketone (PEKK) in comparison to other surface treatment methods. MATERIALS AND METHODS Eighty PEKK discs were subjected to different surface treatments: (1) Untreated (UT); (2) Non-thermal plasma (NTP); (3) Sandblasting with 50 µm Al2O3 particles (SB); and (4) Sandblasting + Non-thermal plasma (SB+NTP). After each surface treatment, the contact angle was measured. Surface conditioning with Visio.Link was applied in all groups after pre-treatment. RelyX Unicem resin cement was bonded onto the PEKK specimens. After fabrication of the specimens, half of each group (n=10) was initially tested, while the other half was subjected to thermocycling (5℃ to 55℃ at 10,000 cycles). Shear bond strength (SBS) testing was performed using a universal testing machine, and failure modes were assessed using stereomicroscopy. The SBS results were analyzed statistically using one-way ANOVA followed by Tukey's post hoc test. Independent t-test was used to examine the effect of thermocycling (P<.05). RESULTS The highest SBS values with or without thermocycling were observed with PEKK specimens that were treated with SB+NTP followed by the SB group. The lowest SBS results were observed in the UT groups. CONCLUSION The shear bond strength between PEKK and resin cements was improved using non-thermal plasma treatment in combination with sandblasting.
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Affiliation(s)
- Wilmart Labriaga
- Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea
| | - So-Yeon Song
- Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea
| | - Jin-Hong Park
- Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea
| | - Jae-Jun Ryu
- Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea
| | - Jeong-Yol Lee
- Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea
| | - Sang-Wan Shin
- Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea
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16
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Richert R, Robinson P, Viguie G, Farges JC, Ducret M. Multi-Fiber-Reinforced Composites for the Coronoradicular Reconstruction of Premolar Teeth: A Finite Element Analysis. BIOMED RESEARCH INTERNATIONAL 2018; 2018:4302607. [PMID: 29984233 PMCID: PMC6011147 DOI: 10.1155/2018/4302607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/08/2018] [Indexed: 11/17/2022]
Abstract
A coronoradicular reconstruction (CRR) has conventionally used a metallic inlay core (MIC) or a single-fiber-reinforced composite (sFRC) but extensive dentin removal can lead to root fracture. We propose herein a multi-fiber-reinforced composite (mFRC) based on a bundle of thin flexible fibers that can be adapted to the root anatomy without removing additional dentin. The aim of this study was to compare the mechanical behavior of the root reconstructed with mFRC, MIC, or sFRC using a finite element analysis (FEA). Models with or without a ferrule effect were created using Autodesk© software and divided into four parts: root, post, bonding composite or cement, and zirconia crown. For both models, extreme stress values (ESV), stress distribution, and risk of fracture were calculated for an oblique force (45°) of 100 N applied to the top of the buccal cusp. Results indicated that mFRC and mFRCG present a lower risk of fracture of the root and of the CRR without ferrule and thus could be valuable alternatives for premolar CRR. Further studies are necessary to evaluate the clinical success of these CRR.
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Affiliation(s)
- Raphaël Richert
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
| | | | - Gilbert Viguie
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
| | - Jean-Christophe Farges
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, UMS3444 BioSciences Gerland-Lyon Sud, Lyon, France
| | - Maxime Ducret
- Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France
- Hospices Civils de Lyon, Service de Consultations et Traitements Dentaires, Lyon, France
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Lyon 1, UMS3444 BioSciences Gerland-Lyon Sud, Lyon, France
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17
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Song CH, Choi JW, Jeon YC, Jeong CM, Lee SH, Kang ES, Yun MJ, Huh JB. Comparison of the Microtensile Bond Strength of a Polyetherketoneketone (PEKK) Tooth Post Cemented with Various Surface Treatments and Various Resin Cements. MATERIALS 2018; 11:ma11060916. [PMID: 29844270 PMCID: PMC6025344 DOI: 10.3390/ma11060916] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 11/16/2022]
Abstract
The aim of this in-vitro research was to evaluate the microtensile bond strength in the newly introduced PEKK tooth post with various surface treatments and resin cements. A fiberglass tooth post was included in order to compare it with PEKK as a possible post material. The microtensile bond strengths of the fiberglass post (FRC Postec Plus) and the PEKK post (Pekkton®) were tested using three kinds of self-adhesive resin cements (G-CEM LinkAce, Multilink Speed, and RelyX U200) and one self-etching resin cement (PANAVIA F2.0). The surface treatments of the fiberglass posts were processed according to the manufacturer’s recommendations (F1, application of 37% phosphoric acid etching gel and silanization). For the PEKK post groups, various surface treatments were performed like no surface treatment (P1), sandblasting (P2), silica-coating and silanization (P3), and sandblasting with a composite primer (P4). In the surface treatment, PEKK posts with silica coating and silane treatment (P3) showed a significantly higher microtensile bond strength (mean MPa: 18.09, p < 0.05). The highest microtensile bond strength was shown when the PEKK posts were treated with a silica coating and silane treatment and cemented with RelyX U200 (mean MPa: 22.22). The PEKK posts with surface treatments of silica-coating and silanization or sandblasting displayed superior microtensile bond strengths (mean MPa: 18.09 and 16.25, respectively) compared to the conventional fiberglass posts (mean MPa: 14.93, p < 0.05).
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Affiliation(s)
- Chan-Hong Song
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jae-Won Choi
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Young-Chan Jeon
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Chang-Mo Jeong
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - So-Hyoun Lee
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Eun-Sook Kang
- Department of Prosthodontics, In-Je University Haeundae Paik Hospital, Busan 48108, Korea.
| | - Mi-Jung Yun
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jung-Bo Huh
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
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18
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Corrigendum to "Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis". BIOMED RESEARCH INTERNATIONAL 2017; 2017:7196847. [PMID: 29234681 PMCID: PMC5694984 DOI: 10.1155/2017/7196847] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 10/29/2017] [Indexed: 11/26/2022]
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