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Sultanoğlu EG, Eliaçık BBK, Eroğlu BK, Tez BÇ. Evaluation of stress distributions in endodontically treated anterior incisors under occlusal and trauma-induced forces following various restoration treatments: A finite element analysis. Dent Traumatol 2024. [PMID: 38990009 DOI: 10.1111/edt.12977] [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: 04/07/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 07/12/2024]
Abstract
BACKGROUND The aim of this study was to calculate the stress distribution of fiberglass post associated with resin composite crown restoration and fiberglass posts with zirconia restorations in mature and immature endodontically treated central maxillary incisor under various loading conditions. MATERIALS AND METHODS The study created six different study models in a virtual environment: healthy mature maxillary central teeth, intact immature maxillary central teeth, mature maxillary central teeth with fiberglass post associated with resin composite crown restoration, immature maxillary central teeth with fiberglass post associated with resin composite crown restoration, mature maxillary central teeth with fiberglass posts and zirconia restoration, and immature maxillary central teeth with fiberglass posts and zirconia restoration. Loading conditions simulating mastication, trauma, and bruxism were applied to each of the models at different angles and amounts. The von Mises and the maximum and minimum principal stress values in tooth structures (dentin) and support structures (bone, PDL) and materials were observed using finite element stress analysis. RESULTS The highest stress values in the tissue and the restoration structure were observed for masticating force and crowns rehabilitated with zirconia restorations. None of the compared loading conditions and restorations showed destructive stress values on periodontal ligament or bone. CONCLUSION The mature and immature endodontically treated central maxillary incisors can be better rehabilitated using fiberglass post associated with resin composite crown restoration and may be preferred to zirconia restorations in order to reduce the stresses on the surrounding tissues and teeth. However, further clinical studies are needed to fully explore this topic.
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Affiliation(s)
- Elifnur Güzelce Sultanoğlu
- Hamidiye Faculty of Dentistry, Department of Prosthodontics, University of Health Sciences, Istanbul, Turkey
| | | | - Büşra Keleş Eroğlu
- Hamidiye Faculty of Dentistry, Department of Prosthodontics, University of Health Sciences, Istanbul, Turkey
| | - Banu Çiçek Tez
- Department of Pediatric Dentistry, Faculty of Dentistry, Ankara Medipol University, Ankara, Turkey
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Zhu J, Li S, Wang D, Li D, Wang X, Rong Q. Effect of remaining pericervical dentin on biomechanical behavior of endocrown-restored molars with different materials: Three-dimensional finite element and Weibull analyses. Dent Mater J 2023; 42:683-691. [PMID: 37612061 DOI: 10.4012/dmj.2023-015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
To evaluate the effect of remaining pericervical dentin (PCD) on the biomechanical behavior of endocrown-restored molars with different materials, six three-dimensional finite element (FE) models were reconstructed with different thicknesses and heights of pulp-chamber lateral dentinal wall (PCLDW). IPS Empress 2, In-Ceram Zirconia, and Lava Ultimate were selected as the materials. Compared with the Lava Ultimate FE models, the maximum tensile stress in the FE models using ceramics was higher in the endocrown and lower in the PCD surrounding it, and the overall failure probabilities with different PCLDW thicknesses and heights were similar, ranging from 9.8% to 12.9% under the normal lateral masticatory force, which were lower than the FE models using Lava Ultimate (ranging from 13.4% to 15.1%). Considering the bonding properties of ceramics, endocrown-restored molars using etchable lithium disilicate-reinforced glass ceramic exhibit superior longevity due to the stress shielding effect, regardless of the thickness and height of PCLDW.
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Affiliation(s)
- Junxin Zhu
- Second Dental Center, Peking University School and Hospital of Stomatology
| | - Shiying Li
- Second Dental Center, Peking University School and Hospital of Stomatology
| | - Dongmei Wang
- Second Dental Center, Peking University School and Hospital of Stomatology
| | - Deli Li
- Second Dental Center, Peking University School and Hospital of Stomatology
| | - Xiaoyan Wang
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology
| | - Qiguo Rong
- Department of Mechanics and Engineering Science, College of Engineering, Peking University
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Adolfi D, Grangeiro MTV, Ausiello P, Bottino MA, Tribst JPM. Effect of Antirotational Two-Piece Titanium Base on the Vertical Misfit, Fatigue Behavior, Stress Concentration, and Fracture Load of Implant-Supported Zirconia Crowns. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4848. [PMID: 37445162 DOI: 10.3390/ma16134848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/28/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023]
Abstract
This study investigated the effects of antirotational titanium bases on the mechanical behavior of CAD/CAM titanium bases used for implant-supported prostheses. The aim was to assess the impact on the marginal fit, fatigue behavior, stress concentration, and fracture load of implant-supported CAD/CAM zirconia crowns. Forty titanium implants were divided into two groups: those with antirotational titanium bases (ARs) and those with rotational titanium bases (RTs). Torque loosening and vertical misfit were evaluated before and after cyclic fatigue testing (200 N, 2 Hz, 2 × 106 cycles). Fracture resistance was assessed using a universal testing machine (1 mm/min, 1000 kgf), and failed specimens were examined with microscopy. Three-dimensional models were created, and FEA was used to calculate stress. Statistical analysis was performed on the in vitro test data using two-way analysis of variance and Tukey's test (α = 0.5). Results show that the presence of an antirotational feature between the implant and titanium base reduced preload loss and stress concentration compared to rotational titanium bases. However, there were no differences in vertical misfit and resistance to compressive load.
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Affiliation(s)
- Dario Adolfi
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José Dos Campos 12220-000, Brazil
| | - Manassés Tercio Vieira Grangeiro
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José Dos Campos 12220-000, Brazil
| | - Pietro Ausiello
- School of Dentistry, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
| | - Marco Antonio Bottino
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José Dos Campos 12220-000, Brazil
| | - João Paulo Mendes Tribst
- Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, 1081 LA Amsterdam, The Netherlands
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Capobianco V, Baroudi K, Santos MJMC, Rubo JH, Rizkalla AS, Dal Piva AMDO, Vitti RP, Tribst JPM, Santos GC. Post-fatigue fracture load, stress concentration and mechanical properties of feldspathic, leucite- and lithium disilicate-reinforced glass ceramics. Heliyon 2023; 9:e17787. [PMID: 37449193 PMCID: PMC10336509 DOI: 10.1016/j.heliyon.2023.e17787] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 06/09/2023] [Accepted: 06/28/2023] [Indexed: 07/18/2023] Open
Abstract
Objective To evaluate the mechanical properties of different CAD/CAM ceramic systems and the post-fatigue fracture and stress distribution when used as cemented crowns. Materials and methods Sixty (60) CAD/CAM monolithic crowns were milled using three different ceramic materials (FD - Feldspathic [Vita Mark II]), LE - Leucite-based ceramic [IPS Empress CAD] and LD - Lithium Disilicate [IPS e.max CAD]) and adhesively cemented on resin composite dyes. Specimens were stored in distillated water (37 °C) for 7 days. After, half of the crowns were submitted to immediate fracture load test while the other half was submitted to fatigue cycling. The average cement layer of approximately 80 μm was assessed using scanning electron microscopy (SEM). The average thickness was used in the three-dimensional (3D) Finite Element Analysis (FEA). For each ceramic material, the density, Poisson ratio, shear modulus, Young modulus, fracture toughness, and true hardness were assessed (n = 3). The data was used to assess the Maximum Principal Stress throughout 3D-FEA according to each material during load to fail and post-fatigue. Data were submitted to two-way ANOVA and Tukey test (α = 0.05). Results LD showed the highest compression load, density, shear modulus, Young modulus, fracture toughness and true hardness values. While LE presented the lowest mechanical properties values. There is no difference in the Poisson ratio between the evaluated ceramics. Conclusion LD was susceptible to aging process but presented stronger physicomechanical properties, showing the highest post-fatigue fracture load and highest stress magnitude.
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Affiliation(s)
| | - Kusai Baroudi
- RAK College of Dental Sciences, RAK Medical & Health Sciences University, RAS Al Khaimah, United Arab Emirates
- School of Dentistry, University of Taubaté, Taubaté, SP, Brazil
| | | | | | - Amin S. Rizkalla
- Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada
| | - Amanda Maria de Oliveira Dal Piva
- Department of Dental Materials, Academic Centre for Dentistry Amsterdam (ACTA),Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - Rafael Pino Vitti
- School of Dentistry, Herminio Ometto University Center, Araras, SP, Brazil
| | - João Paulo Mendes Tribst
- Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA),Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - Gildo Coelho Santos
- Schulich School of Medicine & Dentistry, The University of Western Ontario, London, ON, Canada
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Yoon Y, Lee MJ, Kang I, Oh S. Evaluation of Biomechanical Stability of Teeth Tissue According to Crown Materials: A Three-Dimensional Finite Element Analysis. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4756. [PMID: 37445067 DOI: 10.3390/ma16134756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 06/18/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023]
Abstract
The biomechanical effects of dental tissue according to various dental crown materials were investigated using finite element analysis. Bone, prepared tooth, root canal, and periodontal ligament were modeled based on computed tomography. Depending on the characteristics of the crown material, it was classified into zirconia, hybrid ceramic, gold alloy, and acrylic resin. A loading force of 200 N was applied in the vertical direction to the occlusal surface of the crown, and analysis was performed under the condition that all interfaces were tied. The results demonstrate that the highest von Mises stress was shown in the prepared tooth of the acrylic resin model, which is a temporary prosthesis, and the pulpal pressure was also the highest. Additionally, among the final prosthesis, the highest stress was shown in the hybrid ceramic model prepared teeth. The properties of restoration materials can be a factor influencing the tooth structure. Thus, in order to make a correct decision when selecting a material for restorative treatment, it is necessary to understand, analyze, and evaluate the properties of these restoration materials.
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Affiliation(s)
- Youngjae Yoon
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Myung-Jin Lee
- Department of Dental Hygiene, Division of Health Science, Baekseok University, Cheonan 31065, Republic of Korea
| | - Inyeong Kang
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sanghwan Oh
- Department of Dental Hygiene, Konyang University, Daejeon 35365, Republic of Korea
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Insights and Advancements in Biomaterials for Prosthodontics and Implant Dentistry. Molecules 2022; 27:molecules27165116. [PMID: 36014357 PMCID: PMC9414069 DOI: 10.3390/molecules27165116] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 12/19/2022] Open
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Chávez Vela MJ, López Flores AI. [Maximum compressive stress analysis in upper central incisors rehabilitated with fiberglass posts and three types of crowns. A study with the finite element method]. REVISTA CIENTÍFICA ODONTOLÓGICA 2022; 10:e125. [PMID: 38389553 PMCID: PMC10880689 DOI: 10.21142/2523-2754-1003-2022-125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 09/08/2022] [Indexed: 02/24/2024] Open
Abstract
Objective To evaluate the maximum compressive stress in maxillary central incisors restored with fiberglass posts and three types of crowns by the FEM finite element method. Materials and methods The study was a virtual, descriptive, and laboratory trial. Three virtual models were made using the SolidWorks 2017 software from upper central incisors rehabilitated with fiberglass posts and a metal-ceramic crown, a monolithic lithium disilicate crown, and a zirconium-ceramic crown. They were then subjected to an oblique occlusal load of 150N with an angulation of 45°, distributed towards the palatal aspect. The stress analysis proceeded by comparing the maximum, minimum, and equivalent von Mises stresses. Results The maximum compressive stress was found at the cervical level in the vestibular area of each of the crowns. Zirconium-ceramic crown (Design 3) was the one with the highest compressive stress with 73.89 MPa, followed by Lithium Disilicate crown (Design 2) with 63.42 MPa and the metal-ceramic crown (Design 1) with 48.4 MPa. Conclusion The zirconium-ceramic crown better distributes the stress along the tooth since, due to its rigidity, it absorbs the stresses that are concentrated especially in the cervical area, which could indicate that it is the most appropriate option to rehabilitate endodontically treated teeth.
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Affiliation(s)
- Mayra J Chávez Vela
- División de Rehabilitación Oral de la Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur División de Rehabilitación Oral Universidad Científica del Sur Lima Peru
| | - Ana I López Flores
- División de Rehabilitación Oral de la Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur División de Rehabilitación Oral Universidad Científica del Sur Lima Peru
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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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Sellan PLB, Campaner LM, Tribst JPM, Dal Piva AMDO, de Andrade GS, Borges ALS, Bresciani E, Lanzotti A, Ausiello P. Functional or Nonfunctional Cusps Preservation for Molars Restored with Indirect Composite or Glass-Ceramic Onlays: 3D FEA Study. Polymers (Basel) 2021; 13:polym13213831. [PMID: 34771387 PMCID: PMC8587095 DOI: 10.3390/polym13213831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/04/2021] [Accepted: 11/04/2021] [Indexed: 02/01/2023] Open
Abstract
Evidence regarding the effect of the onlay preparation design for different CAD/CAM restorative materials considering the preservation of cusps is lacking. Molars were 3D-modeled in four preparation designs for onlay restoration: traditional design with functional cusp coverage (TFC), non-retentive design with functional cusp coverage (NFC), traditional design with non-functional cusp coverage (TNFC) and non-retentive design with non-functional cusp coverage (NNFC). The restorations were simulated with two CAD/CAM restorative materials: LD—lithium disilicate (IPS e.max CAD) and RC—resin composite (GrandioBloc). A 100 N axial load was applied to the occlusal surface, simulating the centric contact point. Von Mises (VM) and maximum principal (Pmax) stress were evaluated for restorations, cement layer and dental substrate. The non-retentive preparation design reduced the stress concentration in the tooth structure in comparison to the conventional retentive design. For LD onlays, the stress distribution on the restoration intaglio surface showed that the preparation design, as well as the prepared cusp, influenced the stress magnitude. The non-retentive preparation design provided better load distribution in both restorative materials and more advantageous for molar structure. The resin composite restoration on thenon-functional cusp is recommended when the functional cusp is preserved in order to associate conservative dentistry and low-stress magnitude.
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Affiliation(s)
- Pablo Lenin Benitez Sellan
- School of Dentistry, Universidad Espíritu Santo, Samborondón 092301, Ecuador;
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220-690, Brazil; (L.M.C.); (A.L.S.B.); (E.B.)
| | - Larissa Mendes Campaner
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220-690, Brazil; (L.M.C.); (A.L.S.B.); (E.B.)
| | - João Paulo Mendes Tribst
- Department of Dental Materials, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands; (J.P.M.T.); (A.M.d.O.D.P.)
| | - Amanda Maria de Oliveira Dal Piva
- Department of Dental Materials, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands; (J.P.M.T.); (A.M.d.O.D.P.)
| | - Guilherme Schmitt de Andrade
- Department of Dentistry, Center for Biological and Health Sciences, Western Paraná State University (Unioeste), Cascavel 85819-110, Brazil;
| | - Alexandre Luiz Souto Borges
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220-690, Brazil; (L.M.C.); (A.L.S.B.); (E.B.)
| | - Eduardo Bresciani
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220-690, Brazil; (L.M.C.); (A.L.S.B.); (E.B.)
| | - Antonio Lanzotti
- Fraunhofer JL IDEAS, Department of Industrial Engineering, University of Naples Federico II, 80125 Naples, Italy;
| | - Pietro Ausiello
- School of Dentistry, University of Naples Federico II, 80131 Naples, Italy
- Correspondence:
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