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Martí-Vigil J, Casamitjana J, Marimon X, Cerrolaza M, Medina-Gálvez R, Cantó-Navés O, Ferrer M, Cabratosa-Termes J. Impact Testing in Implant-Supported Prostheses and Natural Teeth: A Systematic Review of Properties and Performance. MATERIALS (BASEL, SWITZERLAND) 2024; 17:4040. [PMID: 39203218 PMCID: PMC11356274 DOI: 10.3390/ma17164040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 08/04/2024] [Accepted: 08/12/2024] [Indexed: 09/03/2024]
Abstract
Dental implants offer an effective solution for partial and total edentulism, but mechanical and biological complications exist. Furthermore, high occlusal loads challenge implants and lead to potential failures. This review focuses on impact testing in contrast to incremental and static tests, an underexplored aspect of assessing daily loads on implants, bringing to light potential complications. The review examines studies employing impact forces to assess implant-supported prostheses and natural teeth properties, highlighting their significance in dental research. A systematic search following PRISMA guidelines identified 21 relevant articles out of 224, emphasizing studies employing impact forces to evaluate various aspects of dental implant treatments. The diverse applications of impact forces in dental research were categorized into tooth structure, restorative materials, interface evaluation, implant properties, and finite element models. Some studies showed the significance of impact forces in assessing stress distribution, shock absorption, and biomechanical response. Impact testing is a critical tool for understanding the daily forces on implants. Despite diverse experimental approaches, a lack of standardized protocols complicates the systematization of the results and, therefore, the conclusions. This review highlights the need for consistent methodologies in impact testing studies for future research on implant-supported prostheses.
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Affiliation(s)
- Jordi Martí-Vigil
- School of Dentistry, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain; (J.M.-V.); (R.M.-G.); (J.C.-T.)
| | | | - Xavier Marimon
- Bioengineering Institute of Technology, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain
| | - Miguel Cerrolaza
- School of Engineering, Science & Technology, Valencian International University, 46002 Valencia, Spain;
| | - Raul Medina-Gálvez
- School of Dentistry, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain; (J.M.-V.); (R.M.-G.); (J.C.-T.)
| | - Oriol Cantó-Navés
- School of Dentistry, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain; (J.M.-V.); (R.M.-G.); (J.C.-T.)
| | - Miquel Ferrer
- Department of Strength of Materials and Structural Engineering, Universitat Politècnica de Catalunya (UPC-BarcelonaTECH), 08034 Barcelona, Spain;
| | - Josep Cabratosa-Termes
- School of Dentistry, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain; (J.M.-V.); (R.M.-G.); (J.C.-T.)
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Zhou Z, Shi R, Wang J, Han X, Gao W, Jiao J, Qi Y, Li Y, Zhou Y, Zhao J. Finite Element Analysis of Different Carbon Fiber Reinforced Polyetheretherketone Dental Implants in Implant-supported Fixed Denture. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024:101902. [PMID: 38685354 DOI: 10.1016/j.jormas.2024.101902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/27/2024] [Indexed: 05/02/2024]
Abstract
OBJECTIVES The purpose of this study is to determine the feasibility of polyetheretherketone-based dental implants, and analyze the stress and strain around different kinds of dental implants by finite element analysis. METHODS The radiographic data was disposed to models in Mimics 19.0. 3D models of implants, crowns and jawbones were established and combined in SolidWorks 2018. Appling axial and oblique loads of 100 N, cloud pictures were exported in Ansys Workbench 18.0 to calculate and analyze the stress and strain in and around different implants. RESULTS Oblique load tended to deliver more stress to bone tissue than axial load. The uniformity of stress distribution was the best for 30% short carbon fiber reinforced polyetheretherketone implants at axial and buccolingual directions. Stress shielding phenomenon occurred at the neck of 60% continuous carbon fiber reinforced polyetheretherketone and titanium implants. Stress concentration appeared in PEEK implants and the load of bone tissue would aggravate. CONCLUSIONS 30% short carbon fiber reinforced polyetheretherketone implants demonstrate a more uniform stress distribution in bone-implant contact and surrounding bone than titanium. Stress shielding and stress concentration may be avoided in bone-implant interface and bone tissue. Bone disuse-atrophy may be inhibited in PEEK-based implants.
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Affiliation(s)
- Zhe Zhou
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Ruining Shi
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Junqi Wang
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Xiao Han
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Weijia Gao
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Junjie Jiao
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Yuanzheng Qi
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Yongli Li
- Hospital of Stomatology, Jilin University, Changchun, 130021, China.
| | - Yanmin Zhou
- Hospital of Stomatology, Jilin University, Changchun, 130021, China; Jilin Province Key Laboratory of Tooth Development and Bone Remodeling, Changchun, 130021, China.
| | - Jinghui Zhao
- Hospital of Stomatology, Jilin University, Changchun, 130021, China; Jilin Province Key Laboratory of Tooth Development and Bone Remodeling, Changchun, 130021, China.
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Goldstein G, Goodacre C, Brown MS, Tarnow DP. Proposal regarding potential causes related to certain complications with dental implants and adjacent natural teeth: Physics applied to prosthodontics. J Prosthodont 2024. [PMID: 38512996 DOI: 10.1111/jopr.13843] [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: 01/25/2024] [Accepted: 03/03/2024] [Indexed: 03/23/2024] Open
Abstract
PURPOSE Complications can and do occur with implants and their restorations with causes having been proposed for some single implant complications but not for others. METHODS A review of pertinent literature was conducted. A PubMed search of vibration, movement, and dentistry had 175 citations, while stress waves, movement, and dentistry had zero citations as did stress waves, movement. This paper discusses the physics of vibration, elastic and inelastic collision, and stress waves as potentially causative factors related to clinical complications. RESULTS Multiple potential causes for interproximal contact loss have been presented, but it has not been fully understood. Likewise, theories have been suggested regarding the intrusion of natural teeth when they are connected to an implant as part of a fixed partial denture as well as intrusion when a tooth is located between adjacent implants, but the process of intrusion, and resultant extrusion, is not fully understood. A third complication with single implants and their crowns is abutment screw loosening with several of the clinical characteristics having been discussed but without determining the underlying process(es). CONCLUSIONS Interproximal contact loss, natural tooth intrusion, and abutment screw loosening are common complications that occur with implant retained restorations. Occlusion is a significant confounding variable. The hypothesis is that vibration, or possibly stress waves, generated from occlusal impact forces on implant crowns and transmitted to adjacent teeth, are the causative factors in these events. Since occlusion appears to play a role in these complications, it is recommended that occlusal contacts provide centralized stability on implant crowns and not be located on any inclined surfaces that transmit lateral forces that could be transmitted to an adjacent tooth and cause interproximal contact loss or intrusion. The intensity, form, and location of proximal contacts between a natural tooth located between adjacent single implant crowns seem to play a role in the intrusion of the natural tooth. Currently, there is a lack of information about the underlying mechanisms related to these occurrences and research is needed to define any confounding variables.
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Affiliation(s)
- Gary Goldstein
- Department of Prosthodontics, New York University College of Dentistry, New York, New York, USA
| | - Charles Goodacre
- Advanced Education Program in Implant Dentistry, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | | | - Dennis P Tarnow
- Columbia University College of Dental Medicine, New York, New York, USA
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Ahn S, Kim J, Baek S, Kim C, Jang H, Lee S. Toward Digital Twin Development for Implant Placement Planning Using a Parametric Reduced-Order Model. Bioengineering (Basel) 2024; 11:84. [PMID: 38247961 PMCID: PMC10813277 DOI: 10.3390/bioengineering11010084] [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: 11/19/2023] [Revised: 12/19/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024] Open
Abstract
Real-time stress distribution data for implants and cortical bones can aid in determining appropriate implant placement plans and improving the post-placement success rate. This study aims to achieve these goals via a parametric reduced-order model (ROM) method based on stress distribution data obtained using finite element analysis. For the first time, the finite element analysis cases for six design variables related to implant placement were determined simultaneously via the design of experiments and a sensitivity analysis. The differences between the minimum and maximum stresses obtained for the six design variables confirm that the order of their influence is: Young's modulus of the cancellous bone > implant thickness > front-rear angle > left-right angle > implant length. Subsequently, a one-dimensional (1-D) CAE solver was created using the ROM with the highest coefficient of determination and prognosis accuracy. The proposed 1-D CAE solver was loaded into the Ondemand3D program and used to implement a digital twin that can aid with dentists' decision making by combining various tooth image data to evaluate and visualize the adequacy of the placement plan in real time. Because the proposed ROM method does not rely entirely on the doctor's judgment, it ensures objectivity.
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Affiliation(s)
- Seokho Ahn
- Department of Digital Manufacturing, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea; (S.A.); (S.L.)
| | - Jaesung Kim
- Department of Industry-Academic Convergence, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Seokheum Baek
- Digital Platform Team, DNDE Inc., Busan 48059, Republic of Korea;
| | - Cheolyong Kim
- Implant Research Laboratory, Cybermed 6-26, Yuseong-daro 1205 beon-gil, Yuseong-gu, Daejeon 34104, Republic of Korea; (C.K.); (H.J.)
| | - Hyunsoo Jang
- Implant Research Laboratory, Cybermed 6-26, Yuseong-daro 1205 beon-gil, Yuseong-gu, Daejeon 34104, Republic of Korea; (C.K.); (H.J.)
| | - Seojin Lee
- Department of Digital Manufacturing, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea; (S.A.); (S.L.)
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Muhsin SA, Mohammed EK, Bander K. Finite Element Analysis: Connector Designs and Pontic Stress Distribution of Fixed Partial Denture Implant-Supported Metal Framework. J Long Term Eff Med Implants 2024; 34:33-47. [PMID: 38842231 DOI: 10.1615/jlongtermeffmedimplants.2023048378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
This virtual study was designed to evaluate the stress-deformation of a metal fixed partial dentures (FPDs) pontic under different loads using two different connectors. The STL file was generated for a RPD of two implant-supported restorations. The Co-Cr metal substructure was designed with two types of connector design. The pontic is connected to implant-supported crowns with square and round shape connectors. This study was designed for a cementless-retained implant-supported FPD. Finite element modeling (FEM) is used to assess the stress and deformation of the pontic within a metal substructure as the FEM might provide virtual values that could have laboratory and clinical relevance. The Co-Cr alloy mechanical properties like the Poisson ratio and modulus of elasticity were based on the parameters of the three-dimensional structure additive method. Nonparametric analyses (Mann-Whitney U test) was used. The use of square or round connectors often resulted in non-significant changes in stress, and deformation under either three or each loaded point on the occlusal surface of a pontic (P > 0.05). However, the deformation revealed distinct variations between loads of the three points compared to each loaded point (P ≤ 0.05). According to this study data, the pontic occlusal surface appears to be the same in stress and deformation under different loads depending on whether square or round connectors are used. While at the same connector designs, the pontic occlusal surface deformed significantly at three loaded points than it did at each point.
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Affiliation(s)
| | | | - Khalid Bander
- Middle Technical University, College of Health and Medical Techniques, Baghdad, Iraq
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Samur Erguven S, Kilinc Y, Erkmen E, Yardimci K. A 3D dynamic finite element analysis of biomechanical behaviour of maxilla and fixative appliances following advancement Le Fort I surgery applied in different lengths. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2023; 125:101756. [PMID: 38157938 DOI: 10.1016/j.jormas.2023.101756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVES Dynamic analysis of chewing impact on the stability of rigid fixation techniques following Le Fort I osteotomy has not been investigated in the previous literature. The aim of the present study was to evaluate segmental displacement and von Mises (VM) stress values on the fixation devices following different amounts of Le Fort I advancements under dynamic loading conditions. MATERIALS AND METHODS The 3D finite element models simulating 3, 5 and 8 mm advancement of maxilla at the Le Fort I level were generated using CBCT scan data. The models included two anterior L plates and two posterior I plates fixations bilaterally. Dynamic finite element analysis was performed to evaluate their biomechanical behavior against chewing cornflakes bio. Von Mises stresses and displacement values on three points were calculated. RESULTS Calculations were made in a time of 38, 40 and 40.5 ms for 3, 5 and 8 mm advancement models, respectively. As the advancement increased, stress values on the plates and displacement values in the D1 (intersection of the apex of the canine tooth with the osteotomy line), D2 (the most prominent point of zygomatic buttress on the osteotomy line), and D3 (intersection of the midline of the second molar tooth with the osteotomy line) points increased. The lowest stress and displacement values were found in the 3 mm advancement model. As advancement increased, the highest values were found in the I plates. The stress levels on the plates and screws remained within safe limits. CONCLUSIONS The von Mises stresses and displacement values tend to increase in according with the amount of advancement. More stress is transferred to posterior I plates and screws under dynamic forces.
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Affiliation(s)
- Sara Samur Erguven
- Department of Oral and Maxillofacial Surgery, Gulhane Faculty of Dentistry, Emrah Mahallesi, University of Health Sciences, Etlik, Keciören, Ankara 06018, Turkiye
| | - Yeliz Kilinc
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Gazi University, Biskek Caddesi (8.Cadde), 1.Sokak, No:8, Emek, Ankara 06490, Turkiye.
| | - Erkan Erkmen
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Gazi University, Biskek Caddesi (8.Cadde), 1.Sokak, No:8, Emek, Ankara 06490, Turkiye
| | - Kaan Yardimci
- Kazım Ozalp Mahallesi, Kız Kulesi Sokak, 21/6 GOP, Cankaya, Ankara, Turkiye
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Abad-Coronel C, Vélez Chimbo D, Lupú B, Pacurucu M, Fárez MV, Fajardo JI. Comparative Analysis of the Structural Weights of Fixed Prostheses of Zirconium Dioxide, Metal Ceramic, PMMA and 3DPP Printing Resin-Mechanical Implications. Dent J (Basel) 2023; 11:249. [PMID: 37999013 PMCID: PMC10670660 DOI: 10.3390/dj11110249] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/11/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023] Open
Abstract
The aim of this study was to determine the mechanical implications of four-unit fixed dental prostheses (FDPs) made of (1) monolithic zirconium dioxide (ZR O2), (2) polymethylmethacrylate (PMMA), (3) metal ceramic (PFM) and (4) impression resin (3DPP). METHODS Four groups were studied with eight samples for each material (n: 32). Each structure was weighed, subjected to compressive tests and analyzed using 3D FEA. RESULTS PMMA presented the lowest structural weight (1.33 g), followed by 3DPP (1.98 g), ZR O2 (6.34 g) and PFM (6.44 g). In fracture tests, PMMA presented a compressive strength of 2104.73 N and a tension of 351.752 MPa; followed by PFM, with a strength of 1361.48 N and a tension of 227.521 MPa; ZR O2, with a strength of 1107.63 N and a tension of 185.098 MPa; and 3DPP, with a strength of 1000.88 N and a tension of 143.916 MPa. According to 3D FEA, 3DPP presented the lowest degree of deformation (0.001 mm), followed by PFM (0.011 mm), ZR O2 (0.168 mm) and PMMA (1.035 mm). CONCLUSIONS The weights of the materials did not have a direct influence on the mean values obtained for strength, stress or strain. Since the performance was related to the tension and forces supported by the structures in critical zones, the importance of considering design factors is clear. In vitro and 3D FEA assays allowed us to simulate different scenarios for the mechanical properties of certain materials before evaluating them clinically. Thus, they can generate predictions that would allow for the design of a better research methodology in future clinical trials.
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Affiliation(s)
- Cristian Abad-Coronel
- Research Group on CAD/CAM Materials and Digital Dentistry, Faculty of Dentistry, University of Cuenca, Cuenca 10107, Ecuador
| | - David Vélez Chimbo
- Facultad de Odontología, Universidad de Cuenca, Cuenca 10107, Ecuador; (D.V.C.); (B.L.); (M.P.)
| | - Billy Lupú
- Facultad de Odontología, Universidad de Cuenca, Cuenca 10107, Ecuador; (D.V.C.); (B.L.); (M.P.)
| | - Miguel Pacurucu
- Facultad de Odontología, Universidad de Cuenca, Cuenca 10107, Ecuador; (D.V.C.); (B.L.); (M.P.)
| | - Marco V. Fárez
- New Materials and Transformation Processes Research Group GiMaT, Universidad Politécnica Salesiana, Cuenca 010105, Ecuador (J.I.F.)
| | - Jorge I. Fajardo
- New Materials and Transformation Processes Research Group GiMaT, Universidad Politécnica Salesiana, Cuenca 010105, Ecuador (J.I.F.)
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Gargallo-Albiol J. How to Enhance Dental Implant Therapies and Definitive Restoration Outcomes to Reduce Complications and Improve Patient Well-Being. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103730. [PMID: 37241357 DOI: 10.3390/ma16103730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
Dental implants have changed modern dentistry, providing a long-term, effective solution for tooth loss [...].
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Affiliation(s)
- Jordi Gargallo-Albiol
- Oral and Maxillofacial Surgery Department, UIC Barcelona-Universitat Internacional de Catalunya, 08195 Barcelona, Spain
- Periodontics and Oral Medicine Department, School of Dentistry, University of Michigan, Ann-Arbor, MI 48109, USA
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Desai SR, Koulgikar KD, Alqhtani NR, Alqahtani AR, Alqahtani AS, Alenazi A, Heboyan A, Fernandes GVO, Mustafa M. Three-Dimensional FEA Analysis of the Stress Distribution on Titanium and Graphene Frameworks Supported by 3 or 6-Implant Models. Biomimetics (Basel) 2023; 8:biomimetics8010015. [PMID: 36648801 PMCID: PMC9844420 DOI: 10.3390/biomimetics8010015] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/19/2022] [Accepted: 12/29/2022] [Indexed: 01/03/2023] Open
Abstract
Titanium is the main component of dental implants. It is also routinely used as a framework material for implant-supported full-arch prostheses due to its low density, biocompatibility, and other mechanical properties. Remarkable mechanical properties such as lesser mass density and higher young's modulus of graphene have gained popularity among scientists, improving the properties of biomedical implants. Thus, our study aimed to compare the outcome through the von Mises stresses generated on All-on-6 and All-on-3 implant models, as well as on the framework, and evaluate the effect of stress patterns on the crestal bone around implants in the mandible. FEA (Finite Element Analysis) study was carried out using edentulous mandible models. Four 3D FEA models with 3 and 6 implants were used (Model 1: Titanium bar-supported 6 straight implants; Model 2: Graphene bar-supported 6 straight implants; Model 3: Titanium bar-supported 3 implants with 30 degrees-tilted; Model 4: Graphene bar-supported 3 implants with 30 degrees-tilted) in order to simulate endosseous implant designs. The implant measuring 4.2 mm in diameter and 11.5 mm in length were used. The most distal implants in the 3-implant models were placed with angulation of 30 degrees; in 6 implants, they were vertically placed. All the models were analyzed for vertical and oblique axis with a single force magnitude of 100 N. In all four implant models and under loading conditions, the peak stress points were always on the neck of the most distal implant. von Mises stresses were within the normal stress range. In a conventional six-straight implant model supported by a titanium framework, the cortical stress in the region of implants was 25.27 MPa, whereas, in the graphene framework, it was 12.18 MPa. Under vertical load, there was a significant difference in the cortical stress around the tilted implants (30 degrees) in the 3-implant system of titanium and graphene frameworks, respectively, 70.31 MPa and 21.27 MPa. The graphene framework demonstrated better results than the titanium framework for the conventional six-implant system under vertical load, achieving stress of 30.09 MPa and 76.60 MPa, respectively. In the case of the 3-implant system, a significant difference in the bar stress was observed between graphene and titanium, respectively, 256.32 MPa and 180.1 MPa of bar stress. Within the limitation of this study, the peri-implant stresses were decreased using graphene framework models. Hence, it was possible to conclude that the best load-bearing capacity results were found in the graphene framework group compared to the titanium framework for All-on-6 and All-on-3 implant models, even though both materials are reliable options used as framework materials in implant-supported full-arch prostheses.
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Affiliation(s)
- Shrikar R. Desai
- Department of Periodontology and Implantology, HKE’S S. Nijalingappa Institute of Dental Sciences and Research, Kalaburagi 585105, India
| | - Kiran Deepak Koulgikar
- Department of Periodontology and Implantology, HKE’S S. Nijalingappa Institute of Dental Sciences and Research, Kalaburagi 585105, India
| | - Nasser Raqe Alqhtani
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Ali Robaian Alqahtani
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Abdullah Saad Alqahtani
- Department of Preventive Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Adel Alenazi
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Artak Heboyan
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Str. Koryun 2, Yerevan 0025, Armenia
| | - Gustavo V. O. Fernandes
- Periodontics and Oral Medicine Department, University of Michigan School of Dentistry, 1011 North University Ave, Ann Arbor, MI 48109, USA
- Correspondence: (G.V.O.F.); (M.M.)
| | - Mohammed Mustafa
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
- Correspondence: (G.V.O.F.); (M.M.)
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A Systematic Study of Restorative Crown-Materials Combinations for Dental Implants: Characterization of Mechanical Properties under Dynamic Loads. Int J Mol Sci 2022; 23:ijms23158769. [PMID: 35955903 PMCID: PMC9369216 DOI: 10.3390/ijms23158769] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/28/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to find the optimum mechanical characteristics of the restorative materials for the manufacture of implant crowns subjected to impact loading when different combinations of materials are used for the inner and outer crown. Several combinations of external–internal crown restorative materials were analyzed. The dynamic stresses at eight different zones of a dental implant subjected to an impact load and the influence of several mechanical properties, such as the Young’s modulus, Poisson’s ratio, density, and initial velocity, were analyzed and compared. A detailed 3D model was created, including the crown, the retention screw, the implant, and a mandible section. The model was then built by importing the 3D geometries from CAD software. The whole 3D model was carefully created in order to guarantee a finite element mesh that produced results adjusted to physical reality. Then, we conducted a numerical simulation using the finite element method (FEM). The results of the FEM analysis allowed for evaluating the effect that different combinations of restorative materials and mechanical properties had on the stress distribution in various regions of the implant. The choice of restorative material is a factor to be considered in order to preserve the integrity of osseointegration. Restorative materials transfer more or less stress to the dental implant and surrounding bone, depending on their stiffness. Therefore, an inadequate Young’s modulus of the rehabilitation material can affect the survival of the implant over time. Eight interactive graphics were provided on a web-based surface platform to help clinical dentists, researchers, and manufacturers to select the best restorative materials combination for the crown.
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Shaikh SA, Rai P, Aldhuwayhi S, Mallineni SK, Lekha K, Joseph AM, Kumari VV, Meshramkar R. Comparative Evaluation of Stress Acting on Abutment, Bone, and Connector of Different Designs of Acid-Etched Resin-Bonded Fixed Partial Dentures: Finite Element Analysis. Front Bioeng Biotechnol 2022; 10:798988. [PMID: 35557860 PMCID: PMC9086361 DOI: 10.3389/fbioe.2022.798988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 02/22/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Finite element analysis (FEA) is one of the best methods for evaluating the stress distribution of restorations, such as fixed partial dentures. The development of resin cement has transformed prosthesis bonding and retention properties. Resin-bonded fixed partial dentures (RBFPD) have been considered minimally invasive treatment options for the prosthetic rehabilitation of single missing teeth.Objectives: The aim of this study was to evaluate the stress load and distribution in four different designs of acid-etched RBFPDs using FEA.Materials and Methods: The designs included standard tooth preparation principles and additional features. The first premolar and first molar abutments replaced the missing second premolar. Designs 1, 2, 3, and 4 included (1) lingual wings and occlusal rests; (2) wings and proximal slices; (3) wings, rests, and grooves; and (4) wings, rests, grooves, and occlusal coverage. The prepared models were restored with RBFPDs. A load of 100 N was applied to the central groove of the pontic to simulate occlusal forces. The materials used in the models were considered to be isotropic, homogeneous, and linearly elastic. FEA was used to reveal stresses acting on the abutment, bone, and connector in all prosthesis designs.Results: The stresses transmitted to the abutment and bones were lowest for design 3, using wings, rests, and grooves. The stresses acting on the connector were the weakest in design 2. The stresses transmitted to the abutment and bone were highest in designs 1 and 4. The stresses transmitted to the connector were highest in design 3.Conclusion: The wings, rests, and grooves design is possibly the ideal and conservative tooth preparation design to receive a posterior RBFPD. This design transmits less stress to the abutments and less bone resorption in the FEA. It is most likely to be successful in the clinical provision and ensures the longevity of the prosthesis.
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Affiliation(s)
- Saquib Ahmed Shaikh
- Department of Prosthodontics, College of Dentistry, Majmaah University, Majmaah, Saudi Arabia
| | - Punith Rai
- Department of Prosthodontics, SDM Dental College, Dharwad, India
| | - Sami Aldhuwayhi
- Department of Prosthodontics, College of Dentistry, Majmaah University, Majmaah, Saudi Arabia
| | - Sreekanth Kumar Mallineni
- Department of Preventive Dental Science, College of Dentistry, Majmaah University, Majmaah, Saudi Arabia
- Center for Transdisciplinary Research (CFTR), Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College, Saveetha University, Chennai, India
- *Correspondence: Sreekanth Kumar Mallineni, ,
| | | | - Angel Mary Joseph
- Department of Prosthodontics, College of Dentistry, Majmaah University, Majmaah, Saudi Arabia
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Evaluation of Zirconia and High Performance Polymer Abutment Surface Roughness and Stress Concentration for Implant-Supported Fixed Dental Prostheses. COATINGS 2022. [DOI: 10.3390/coatings12020238] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Background: The High Performance Polymer is a based polymer biomaterial that was introduced as dental material to manufacture dentures superstructure and dental implants abutments. However, its surface characteristics and stress state still need to be properly described. The aim of this study was to compare the surface characteristics of a High Performance Polymer (Bio-HPP, Bredent, Senden, Germany) for computer-aided design and computer-aided manufacturing (CAD/CAM) milling and a Zirconia (Zirkonzahn, Steger, Ahrntal, Italy). Methods: The abutments surface roughness (Ra) was evaluated for each abutment material (N = 12) using a confocal laser microscope. Data were evaluated using One-Way ANOVA and Tukey tests (p < 0.05). In addition, a finite element analysis software was used to present stress measurement data as stress maps with 100 N loading. Results were generated according to Von-mises stress criteria and stress peaks were recorded from each structure. Results: Results showed a mean Ra of 0.221 ± 0.09 μm for Bio-HPP and 1.075 ± 0.24 μm for Zirconia. Both surface profiles presented a smooth characteristic regardless the measurement axis. The stress peaks from implant fixture and screw were not affected by the abutment material, however the high performance polymer showed the highest stress magnitude for the abutment region. Conclusions: Comparing the present results with the literature it is suggested that the CAD/CAM High Performance Polymer abutments present an adequate surface roughness with acceptable values of stress.
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