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Bömicke W, Boisserée P, Rammelsberg P, Rues S. Initial damage and failure load of zirconia-ceramic and metal-ceramic posterior cantilever fixed partial dentures. Clin Oral Investig 2024; 28:94. [PMID: 38221600 PMCID: PMC10788321 DOI: 10.1007/s00784-024-05501-z] [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: 10/16/2023] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
OBJECTIVES The aim of this study was to compare failure load and initial damage in monolithic, partially veneered, and completely veneered (translucent) zirconia cantilevered fixed partial dentures (CFPDs), as well as completely veneered metal-ceramic CFPDs under different support and loading configurations. MATERIALS AND METHODS Eight test groups with anatomically congruent CFPDs (n = 8/group) were fabricated, differing in CFPD material/support structure/loading direction (load applied via steel ball (Ø 6 mm) 3 mm from the distal end of the pontic for axial loading with a 2-point contact on the inner cusp ridges of the buccal and oral cusps and 1.3 mm below the oral cusp tip for 30° oblique loading): (1) monolithic zirconia/CoCr abutment teeth/axial, (2) monolithic zirconia/CoCr abutment teeth/oblique, (3) partially veneered zirconia/CoCr abutment teeth/axial, (4) partially veneered zirconia/CoCr abutment teeth/oblique, (5) completely veneered zirconia/CoCr abutment teeth/axial, (6) completely veneered CoCr/CoCr abutment teeth/axial (control group), (7) partially veneered zirconia/implants/axial, and (8) partially veneered zirconia/natural teeth/axial. Restorations were artificially aged before failure testing. Statistical analysis was conducted using one-way ANOVA and Tukey post hoc tests. RESULTS Mean failure loads ranged from 392 N (group 8) to 1181 N (group 1). Axially loaded monolithic zirconia CFPDs (group 1) and controls (group 6) showed significantly higher failure loads. Oblique loading significantly reduced failure loads for monolithic zirconia CFPDs (group 2). Initial damage was observed in all groups except monolithic zirconia groups, and fractography revealed design flaws (sharp edges at the occlusal boundary of the veneering window) in partially veneered zirconia CFPDs. CONCLUSIONS Monolithic zirconia CFPDs might be a viable alternative to completely veneered CoCr CFPDs in terms of fracture load. However, oblique loading of monolithic zirconia CFPDs should be avoided in clinical scenarios. Design improvements are required for partially veneered zirconia CFPDs to enhance their load-bearing capacity. CLINICAL RELEVANCE Monolithic zirconia may represent a viable all-ceramic alternative to the established metal-ceramic option for CFPD fabrication. However, in daily clinical practice, careful occlusal adjustment and regular monitoring should ensure that oblique loading of the cantilever is avoided.
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Affiliation(s)
- Wolfgang Bömicke
- Department of Prosthetic Dentistry, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.
| | | | - Peter Rammelsberg
- Department of Prosthetic Dentistry, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Stefan Rues
- Department of Prosthetic Dentistry, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
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Reslan MR, Osman E, Segaan L, Rayyan M, Sayed M, El-Hussein IG. Comparison between Distal Extension Attachment-retained Removable Partial Prostheses with Integrated and Conventional Reciprocation Designs: A Clinical Trial. J Contemp Dent Pract 2023; 24:89-96. [PMID: 37272139 DOI: 10.5005/jp-journals-10024-3479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIM To compare marginal bone level (MBL) around the abutments in integrated and conventional reciprocation designs in attachment-retained removable partial prosthesis (A-RPP). MATERIALS AND METHODS Around 14 participants were indiscriminately selected and separated into two groups. For every group, an A-RPP with one of the studied reciprocation types was fabricated and assessed. Group I received A-RPP with integrated reciprocation and group II received A-RPP with conventional reciprocation. MBL around the crowned primary and secondary abutments was assessed on the day of A-RPP insertion, at 6 and at 9 months of denture use. RESULTS Comparison of MBL values at the primary and secondary abutments within each group showed no statistical difference from time of delivery and throughout the study. After using the A-RPP for 6 and 9 months, group I revealed lower mean values of MBL than group II which were statistically significant. CONCLUSION Distal extension A-RPP with integrated and conventional reciprocation designs were associated with raise in bone loss. Integrated reciprocation design revealed a lesser amount of bone loss than the conventional reciprocation design and therefore, it is considered as more preferable to be used. CLINICAL SIGNIFICANCE Distal extension A-RPP with integrated reciprocation is superior in terms of periodontium preservation around abutment teeth as compared to distal extension A-RPD with conventional reciprocation.
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Affiliation(s)
- Maria Raafat Reslan
- Department of Oral Rehabilitation Sciences, Faculty of Dentistry, Beirut Arab University, Lebanon
| | - Essam Osman
- Department of Oral Rehabilitation Sciences, Faculty of Dentistry, Beirut Arab University, Lebanon
| | - Lucette Segaan
- Department of Removable Prosthodontics, Faculty of Dentistry, Alexandria University, Egypt
| | - Mohammad Rayyan
- Department of Fixed Prosthodontics, Faculty of Dentistry, Saini University, Kantara Campus, Egypt
| | - Mohamed Sayed
- Department of Fixed Prosthodontics, Faculty of Dentistry, Sinai University, Kantara Campus, Sinai, Egypt, Phone: +201288670943, e-mail:
| | - Ibrahim Gamal El-Hussein
- Department of Removable Prosthodontics, Faculty of Dentistry, Sinai University, Kantara Campus, Egypt
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Wang L, Fu ZH, Hu ZH, Li M, Qiu LH, Gao Z. Biomechanical behaviour of implant prostheses and adjacent teeth according to bone quality: A finite element analysis. Eur J Oral Sci 2022; 130:e12863. [PMID: 35342996 DOI: 10.1111/eos.12863] [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: 10/25/2021] [Accepted: 02/28/2022] [Indexed: 11/26/2022]
Abstract
The contribution of biomechanical factors in the formation of proximal contact loss has been observed, but there is little research on the mechanisms by which they contribute. Using finite element analysis, this study aimed to analyse the impact of bone quality on the biomechanical behaviour of a dentition consisting of implant prostheses and adjacent teeth. The occlusal load was applied on the implant/tooth crown. In the mesiodistal direction, the adjacent natural tooth mesially to the implant denture had the tendency for mesial movement, while the distal adjacent natural tooth had the tendency for distal movement. For the supporting bone around the mesial adjacent tooth, the maximum/minimum principal stress and strain values on the mesial side of the bone were higher than those on the distal side of the bone. Stress and strain values on the mesial side of the supporting bone around the distal adjacent tooth were lower than those on the distal side. With decreasing bone density, displacements of teeth and the implant denture, principal stresses and equivalent strains on tooth supporting bone increased. Studies on biomechanical behaviours of a tooth-implant dentition may provide a deeper understanding of implant-induced dental adaptive processes such as proximal contact loss.
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Affiliation(s)
- Lan Wang
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhi-Hui Fu
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhi-Hui Hu
- School of Electronic Science and Engineering, Xiamen University, Xiamen, China
| | - Min Li
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li-Hua Qiu
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Chongqing Medical University, Chongqing, China
| | - Zhi Gao
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Yu W, Chen S, Ma L, Ma X, Xu X. Biomechanical Analysis of Different Framework Design, Framework Material and Bone Density in the Edentulous Mandible With Fixed Implant-Supported Prostheses: A Three-Dimensional Finite Element Study. J Prosthodont 2022; 32:309-317. [PMID: 35546271 DOI: 10.1111/jopr.13532] [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: 07/09/2021] [Accepted: 04/24/2022] [Indexed: 11/30/2022] Open
Abstract
PURPOSE The objective of this finite element study was to investigate the effect of different framework designs, framework materials, and bone densities on the stress distribution of fixed implant-supported prostheses for edentulous mandibles. MATERIALS AND METHODS Under the condition of 2-mm cortical bone, 16 models were created in the edentulous mandible to simulate different framework designs (1-piece or 3-piece frameworks) with different framework material (pure titanium, zirconia, polyetheretherketone, or carbon fiber-reinforced polyetheretherketone) in-high or low-density trabecular bone. Then, vertical loading and oblique loading at 75° were applied to the anterior and posterior regions. The stress distribution and stress concentration region of implant and peri-implant bone with different combinations were compared by finite element analysis. RESULTS The use of the 1-piece zirconia framework in high-density trabecular bone improved stress distribution on implants and peri-implant bone. The region of stress concentration is located in the buccal cervix of the distal implants and the distobuccal portion of the cortical bone in all models. To improve the stress distribution on fixed implant-supported dentures for edentulous mandibles, the 1-piece framework and zirconia represent the better combinations. CONCLUSION Under the condition of 2-mm cortical bone thickness, the full-arch zirconia framework had minimum von Mises stress on implants and peri-implant bone in all models, and high trabecular bone density greatly decreased the stress on cortical bone. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Wenqian Yu
- Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Siyi Chen
- Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Li Ma
- Department of Vip center, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Xiaoni Ma
- Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Xin Xu
- Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Provincial Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
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Xie B, Chen J, Zhao T, Shen J, Dörsam I, He Y. Three-Dimensional Finite Element Analysis of Anterior Fixed Partial Denture Supported by Implants with Different Materials. Ann Anat 2022; 243:151943. [DOI: 10.1016/j.aanat.2022.151943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 02/17/2022] [Accepted: 03/17/2022] [Indexed: 11/17/2022]
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Ding X, Li J, Zhang X, Yan X. Effects of 3 different residual root treatments after post-and-core restoration: An in vitro fracture resistance experiment and finite element analysis. J Prosthet Dent 2020; 124:485.e1-485.e10. [DOI: 10.1016/j.prosdent.2020.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/04/2020] [Accepted: 03/04/2020] [Indexed: 12/28/2022]
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SaranBabu KA, Perisetty DK, Thota G, Rasool M, Niharika M, Swapna S. Influence of Radius of Curvature at Gingival Embrasure in Connector Area on Stress Distribution of Three-Unit Posterior Full-Contour Monolithic Zirconia Fixed Partial Denture on Various Amounts of Load Application: A Finite Element Study. J Int Soc Prev Community Dent 2019; 9:338-348. [PMID: 31516867 PMCID: PMC6714414 DOI: 10.4103/jispcd.jispcd_20_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 05/01/2019] [Indexed: 11/04/2022] Open
Abstract
Objectives To test the hypothesis that radius of curvature at gingival embrasure in connector area significantly affects the fracture resistance of full-contour monolithic zirconia three-unit posterior Fixed partial denture (FPD) on various amounts of load application. Materials and Methods In this study, two types of three-dimensional finite element models of a three-unit posterior full-contour monolithic zirconia FPD with two gingival embrasure radii (rGE I, 0.45 mm and rGE II, 0.25 mm) were constructed. The components modeled through finite element modeling were subjected to 400, 600, and 800 N vertical loads at the central fossa of the pontic, and further analysis was carried out. Results All the results were displayed by post-processor finite element analysis software (ANSYS). The study revealed that with increase in the amount of load application as well as decrease in the gingival embrasure radii, stress concentration values were increasing gradually for both the full-contour monolithic zirconia FPD. Conclusion The fracture resistance of the zirconia posterior FPD was significantly affected by the gingival embrasure radii and the mode of load application. When there is a clinical situation of heavier occlusal forces, the fracture resistance can be increased by designing greater gingival embrasure radii in the connector region.
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Affiliation(s)
- Kalamalla A SaranBabu
- Department of Prosthodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
| | - Dinesh Kumar Perisetty
- Department of Endodontics and Conservative Dentistry, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
| | - Gunaranjan Thota
- Department of Endodontics and Conservative Dentistry, GSL Dental College and Hospital, Rajhamandry, Andhra Pradesh, India
| | - Mahammad Rasool
- Department of Prosthodontics, CKS Theja Dental College and Hospital, Tirupati, Andhra Pradesh, India
| | - Mungara Niharika
- Department of Endodontics and Conservative Dentistry, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
| | - Sannapureddy Swapna
- Department of Endodontics and Conservative Dentistry, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
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Arinc H. Effects of Prosthetic Material and Framework Design on Stress Distribution in Dental Implants and Peripheral Bone: A Three-Dimensional Finite Element Analysis. Med Sci Monit 2018; 24:4279-4287. [PMID: 29930240 PMCID: PMC6045918 DOI: 10.12659/msm.908208] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The purpose of this study was to evaluate the effects of prosthetic material and framework design on the stress within dental implants and peripheral bone using finite element analysis (FEA). MATERIAL AND METHODS A mandibular implant-supported fixed dental prosthesis with different prosthetic materials [cobalt-chromium-supported ceramic (C), zirconia-supported ceramic (Z), and zirconia-reinforced polymethyl methacrylate (ZRPMMA)-supported resin (ZP)] and different connector widths (2, 3, and 4 mm) within the framework were used to evaluate stress via FEA under oblique loading conditions. Maximum principal (smax), minimum principal (smin), and von Mises (svM) stress values were obtained. RESULTS Minimum stress values were observed in the model with a 2-mm connector width for C and ZP. The models with 3-mm and 4-mm connector widths showed higher stress values than the model with a 2-mm connector width for C (48-50%) and ZP (50-52%). Similar stress values were observed in the 3- and 4-mm models. There was no significant difference in the amount of stress with Z regardless of connector width. The Z and ZP models showed similar stress values in the 3- and 4-mm models and higher stress values than in the C model. Z, ZP, and C showed the highest stress values for the model with a 2-mm connector width. CONCLUSIONS Changes in the material and width of connectors may influence stress on cortical bone, cancellous bone, and implants. C was associated with the lowest stress values. Higher maximum and minimum principal stress values were seen in cortical bone compared to cancellous bone.
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Affiliation(s)
- Hakan Arinc
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
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Debye K, Tuna T, Bishti S, Wolfart S. Influence of additional reinforcement of fixed long-term temporary restorations on fracture load. J Prosthodont Res 2018; 62:416-421. [PMID: 29636242 DOI: 10.1016/j.jpor.2018.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 02/25/2018] [Accepted: 03/03/2018] [Indexed: 11/29/2022]
Abstract
PURPOSE In implant dentistry, temporary restorations (TR) might often be required for up to one year. The aim of this in vitro study was to evaluate the long-time performance of four-unit TRs in the posterior region based on different materials and reinforcement methods. METHODS One hundred and forty four TRs were manufactured on 16 models simulating an oral situation of two missing posterior teeth. With a computer-aided-design/computer-aided-manufacturing (CAD/CAM) workflow, a TR was fabricated (CAD; Telio CAD), which served as a template for other subgroups. With a vacuum-formed template, unreinforced and reinforced TRs [glass fibres (g; EverStick); polyethylenefibres (p; Ribbond original) and TRs with increased connector area (c; 27.5-35mm2)] were manufactured. Two different composite materials were used (C1: Luxatemp, C2: Protemp). Altogether, 16 subgroups with 8 specimens each were tested. After temporary luting (Temp Bond NE) and artificial-aging [1600 thermo-cycles (5-55°C), 240,000 chewing-cycles (50N)], all specimens were tested until fracture in a universal testing machine. RESULTS After artificial aging, mean fracture loads (N) were: (C1)201.2±109.7, (C1c)1033.0±173.1, (C1p)90.0±40.0, (C1g)75.9±25.9, (C2)108.6±58.6, (C2c)1363.3±148.6, (C2p)104.7±54.7, (C2g)50.0±0.0 and (CAD)232.5±19.1. The one-factor ANOVA analysis showed significant differences for the factors temporary material (p<0.047), reinforcement (p<0.0001) and artificial-aging (p<0.0001). CONCLUSIONS The study indicated that both CAD/CAM TRs and TRs with increased connector areas are suitable for long-term use of one year. No enhancement of fracture load was observed for fibre-reinforced TRs except for the fact that fractured TRs were not totally separated.
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Affiliation(s)
- Katharina Debye
- Department of Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University, Aachen, Germany.
| | - Taskin Tuna
- Department of Prosthodontics and Biomaterials, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Shaza Bishti
- Department of Prosthodontics and Biomaterials, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Stefan Wolfart
- Department of Prosthodontics and Biomaterials, Medical Faculty, RWTH Aachen University, Aachen, Germany
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Miura S, Kasahara S, Yamauchi S, Egusa H. Effect of finish line design on stress distribution in bilayer and monolithic zirconia crowns: a three-dimensional finite element analysis study. Eur J Oral Sci 2018; 126:159-165. [DOI: 10.1111/eos.12402] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Shoko Miura
- Division of Molecular and Regenerative Prosthodontics; Tohoku University Graduate School of Dentistry; Sendai Miyagi Japan
| | - Shin Kasahara
- Division of Molecular and Regenerative Prosthodontics; Tohoku University Graduate School of Dentistry; Sendai Miyagi Japan
| | - Shinobu Yamauchi
- Division of Molecular and Regenerative Prosthodontics; Tohoku University Graduate School of Dentistry; Sendai Miyagi Japan
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics; Tohoku University Graduate School of Dentistry; Sendai Miyagi Japan
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