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Togo S, Sakaue T, Tsutsui A, Matsuda Y, Nakajima K, Takeda T, Fukuda K, Vallittu P, Lassila L. Effect of Vinyl Acetate, Glass Fibers Contents, and Buffer Space on EVA's Mechanical Property and Shock Absorption Ability. Eur J Dent 2024. [PMID: 38744336 DOI: 10.1055/s-0044-1779427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024] Open
Abstract
OBJECTIVES The aim of the study was to evaluate the mechanical properties and impact absorption capacity of prototype materials comprising ethylene vinyl acetate (EVA) of different hardness reinforced using different amounts of glass fibers (GFs), considering a buffer space. MATERIALS AND METHODS Six prototype materials were made by adding E-GFs (5 and 10 wt%) to EVA with vinyl acetate (VA) contents of 9.4 wt% ("hard" or HA) and 27.5 wt% ("soft" or SO). Durometer hardness and tensile strength tests were performed to evaluate the mechanical properties of the materials. Moreover, an impact test was conducted using a customized pendulum impact tester to assess the impact absorption capacity (with or without a buffer space) of the specimens. RESULTS The mechanical properties of the prototypes, namely, durometer hardness, Young's modulus, and tensile strength, were significantly higher in the HA group than in the SO group, regardless of the presence or added amount of GFs. The addition of GFs, particularly in a large amount (10 wt%), significantly increased these values. In terms of the impact absorption capacity, the original hardness of the EVA material, that is, its VA content, had a more substantial effect than the presence or absence of GFs and the added amount of GFs. Interestingly, the HA specimens with the buffer space exhibited significantly higher impact absorption capacities than the SO specimens. Meanwhile, the SO specimens without the buffer space exhibited significantly higher impact absorption capacities than the HA specimens. Moreover, regardless of the sample material and impact distance, the buffer space significantly improved impact absorption. In particular, with the buffer space, the impact absorption capacity increased with the added amount of GFs. CONCLUSION The basic mechanical properties, including durometer hardness, Young's modulus, and tensile strength, of the EVA prototype were significantly increased by reducing the amount of VA regardless of the presence or added amount of GFs. Adding GFs, particularly in large amounts, significantly increased the values of aforementioned mechanical properties. Impact absorption was significantly affected by the hardness of the original EVA material and enhanced by the addition of the buffer space. The HA specimen had a high shock absorption capacity with the buffer space, and the SO specimen had a high shock absorption capacity without the buffer space. With the buffer space, impact absorption improved with the amount of added GFs.
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Affiliation(s)
- Shinji Togo
- Division of Sports, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Takahiro Sakaue
- Division of Sports, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Arata Tsutsui
- Division of Sports, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Yoshiaki Matsuda
- Division of Sports, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Kazunori Nakajima
- Division of Sports, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Tomotaka Takeda
- Division of Sports, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Kenichi Fukuda
- Division of Special Needs Dentistry and Orofacial Pain, Department of Oral Health and Clinical Science, Tokyo Dental College, Tokyo, Japan
| | - Pekka Vallittu
- Department of Biomaterials Science and TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Lippo Lassila
- Department of Biomaterials Science and TCBC, Institute of Dentistry, University of Turku, Turku, Finland
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Haddad E Borro L, de Queiroz TS, da Cruz BS, Demachkia AM, Borges ALS, Tribst JPM, Paes Junior TJDA. Enhancing mouthguard longevity: Impact of surface treatment against aging from brushing and disinfectant exposure. Dent Traumatol 2024. [PMID: 38459667 DOI: 10.1111/edt.12941] [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: 12/15/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 03/10/2024]
Abstract
BACKGROUND/AIMS The study aimed to assess the surface characteristics of sports mouthguards under mechanical stresses during cleaning, either by brushing or immersion in disinfectant solutions. MATERIAL AND METHODS Ethylene-vinyl acetate samples, 4 mm thick, were randomly assigned to cleaning methods: control (C-no cleaning), brushing with water (B.W), brushing with neutral liquid soap (B.S), brushing with toothpaste (B.T), immersion in distilled water for 10 min (I.W), immersion in 2.25% sodium hypochlorite solution for 10 min (I.SH), and immersion in sodium bicarbonate solution for 5 min (I.SB). All cleaning methods were applied for 28 days. Surface roughness average (Ra) and wettability were measured at baseline for the control group (n = 9), and after cleaning for all the other groups. RESULTS One-way ANOVA with Tukey tests (5% significance) indicated significant differences among groups (p < .05). The I.SB group had higher surface roughness than B.S and B.T (p < .05). B.W showed the lowest wettability, significantly lower than B.T, I.W, and I.SB (p < .05). I.SB exhibited the highest wettability, significantly different from sodium hypochlorite, neutral liquid soap, brushing with water, and control groups (p < .05). The sodium bicarbonate immersion group (I.SB) demonstrated greater statistical variation, displaying higher susceptibility to aging compared to brushing with neutral liquid soap. CONCLUSION Cleaning mouthguards with a toothbrush, water, and neutral liquid soap emerged as the most promising method, causing minimal surface changes in the material.
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Affiliation(s)
- Larissa Haddad E Borro
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), São José Dos Campos, SP, Brazil
| | - Talita Suelen de Queiroz
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), São José Dos Campos, SP, Brazil
| | - Beatriz Serralheiro da Cruz
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), São José Dos Campos, SP, Brazil
| | - Amir Mohidin Demachkia
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), São José Dos Campos, SP, Brazil
| | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), São José Dos Campos, SP, Brazil
| | - João Paulo Mendes Tribst
- Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Atif M, Tewari N, Reshikesh M, Chanda A, Mathur VP, Morankar R. Methods and applications of finite element analysis in dental trauma research: A scoping review. Dent Traumatol 2024. [PMID: 38279593 DOI: 10.1111/edt.12933] [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: 08/11/2023] [Revised: 12/16/2023] [Accepted: 01/08/2024] [Indexed: 01/28/2024]
Abstract
Finite Element Analysis (FEA) is vital for understanding dental traumatology (DT) biomechanics, aiding diagnosis, treatment planning, and outcome prediction. This review explores FEA applications in DT research, evaluates their quality and outcomes, and assesses methodological aspects. Accordingly, recommendations for future researchers are provided. The study adhered to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines for scoping reviews and registered in Open Science framework. A comprehensive search using relevant text-words and MeSH terms was performed in established databases. The inclusion criteria encompassed all Finite element analysis (FEA)-based Dental traumatology (DT) studies without language or publication year restrictions. Risk of bias was assessed with the Risk of bias tool for the use of finite element analysis in dentistry (ROBFEAD) tool. Forty-six studies published from 2001 to 2023 were included in the qualitative synthesis. The studies were categorized into five domains and six subdomains based on objectives. Maxillary central incisors and surrounding structures were commonly modelled (n = 27). Most studies utilized Computed tomography (CT), Cone Beam CT, or micro CT. Traumatic injury forces ranged from 100 N to 2000 N, and occlusal forces ranged from 150 N to 350 N. All studies were rated as high risk of bias. Fory-six studies were categorized, with most focusing on stress distribution and fracture patterns in dento-alveolar structures under various conditions, while few assessed displacements. Methodological quality lacked robustness in model development and substructure properties. Future studies should address these limitations and enhance reporting practices.
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Affiliation(s)
- Mohammad Atif
- Division of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Nitesh Tewari
- Division of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Manjari Reshikesh
- Division of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Arnab Chanda
- Centre for Biomedical Engineering, IIT, Delhi, India
| | - Vijay Prakash Mathur
- Division of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Rahul Morankar
- Division of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
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Tribst JPM, Dal Piva AMDO, Kalman L. Stress Concentration of Hybrid Occlusal Splint-Mouthguard during a Simulated Maxillofacial Traumatic Impact: 3D-FEA. Dent J (Basel) 2022; 10:dj10040065. [PMID: 35448059 PMCID: PMC9029277 DOI: 10.3390/dj10040065] [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] [Received: 12/09/2021] [Revised: 02/14/2022] [Accepted: 04/02/2022] [Indexed: 11/20/2022] Open
Abstract
Mouthguards (MG) are protective devices that can reduce the risks of facial trauma. However, many athletes do not use them. Additionally, MG wear with coincidental parafunctional activity has not been considered. The aim of this study was to evaluate the stress distribution as a consequence of a direct impact comparing a conventional MG with a novel hybrid appliance (HMG). Using computer-aided design (CAD) software, a human skull was modeled with the teeth inserted into their respective alveolus. The models were divided according to the MG type (conventional or hybrid). The geometries were exported to the computer-aided engineering (CAE) software and the materials were considered isotropic. Fixation was defined at the base of the maxilla. The load was applied using a hockey puck. The total deformation (mm) and the von Mises stress (MPa) results were obtained for the MGs (conventional and hybrid), upper teeth, lower teeth, and maxillary bone. Despite the presence of an MG, it is still possible to observe generated stress in all structures. However, the hybrid design was more efficient than the conventional design in reducing the displacement during the impact and consequently the stress on the upper teeth, lower teeth, and maxillary bone. Higher stress magnitude was more concentrated at the inner portion of the hybrid design than the conventional device. The HMG appliance decreased the stress concentration in the teeth and in the bone, limiting the areas susceptible to injuries to the regions directly impacted by the hockey puck. Although the novel HMG may mitigate injury, some stress will still result, and any possible injury should be evaluated by a dental professional.
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Affiliation(s)
- 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;
| | - 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;
- Correspondence:
| | - Les Kalman
- Schulich School of Medicine & Dentistry, Western University, 1151 Richmond St., London, ON N6A 3K7, Canada;
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Biomechanical Behavior Evaluation of a Novel Hybrid Occlusal Splint-Mouthguard for Contact Sports: 3D-FEA. Dent J (Basel) 2021; 10:dj10010003. [PMID: 35049601 PMCID: PMC8774877 DOI: 10.3390/dj10010003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 12/23/2022] Open
Abstract
Background: Orofacial injuries are common occurrences during contact sports activities. However, there is an absence of data regarding the performance of hybrid occlusal splint mouthguards (HMG), especially during compressive loading. This study amid to evaluate the biomechanical effects of wearing a conventional custom mouthguard (MG) or the HMG on the teeth, bone, and the device itself. Methods: To evaluate the total deformation and stress concentration, a skull model was selected and duplicated to receive two different designs of mouthguard device: one model received a MG with 4-mm thickness and the other received a novel HMG with the same thickness. Both models were subdivided into finite elements. The frictionless contacts were used, and a nonlinear analysis was performed simulating the compressive loading in occlusion. Results: The results were presented in von-Mises stress maps (MPa) and total deformation (mm). A higher stress concentration in teeth was observed for the model with the conventional MG, while the HMG design displayed a promising mechanical response with lower stress magnitude. The HMG design displayed a higher magnitude of stress on its occlusal portion (7.05 MPa) than the MG design (6.19 MPa). Conclusion: The hybrid mouthguard (HMG) reduced (1) jaw displacement during chewing and (2) the generated stresses in maxillary and mandibular teeth.
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Fonseca GL, Neto NTL, Prieto MGDL, Azevedo F, Harrop C, Oliveira N. Effect of the bracketless orthodontics technique and resin composite material on the biomechanical response of the upper central incisor: 3D finite element analysis. APOS TRENDS IN ORTHODONTICS 2021. [DOI: 10.25259/apos_89_2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objectives:
The bracketless orthodontic treatment (BOT) is an alternative technique which indicates using an orthodontic appliance composed of wires and composite resin assisted by 3D technology. However, the biomechanical response of central incisor orthodontic movement has yet to be investigated. Thus, the aim of the present investigation was to calculate the stress magnitude in central incisor movement through 3D finite element analysis using different wire diameters (0.012”, 0.014”, and 0.016”) of nickel–titanium wire and two different resin composites (Opallis and Filtek).
Materials and Methods:
A 3D volume composed of enamel, dentin, cortical bone, cancellous bone, periodontal ligament, composite resin, and different orthodontic wire diameters was designed. After the modeling process, the models were exported to computer-aided engineering software divided into a finite number of elements, and a mechanical structural static analysis was conducted.
Results:
The stress results were plotted on colorimetric maps and in tables for comparison between the different models. The results showed that the central incisor orthodontic movement with BOT does not induce damage to the periodontal ligament, dental root, or bone tissue, regardless of the simulated orthodontic wire diameter and resin composite materials. The palatal composite resin and orthodontic wire also presented acceptable stress magnitude during orthodontic movement.
Conclusion:
Thus, the BOT technique promoted a suitable biomechanical response during central incisor movement regardless the resin composite.
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Affiliation(s)
| | | | | | - Felipe Azevedo
- Department of Orthodontics, University of Sete Lagoas (FACSETE), Brazil,
| | - Cristina Harrop
- Department of Orthodontics, University of Sete Lagoas (FACSETE), Brazil,
| | - Nivaldo Oliveira
- Department of Orthodontics, University of Sete Lagoas (FACSETE), Brazil,
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Modeling the Contact Interaction of a Pair of Antagonist Teeth through Individual Protective Mouthguards of Different Geometric Configuration. MATERIALS 2021; 14:ma14237331. [PMID: 34885485 PMCID: PMC8658410 DOI: 10.3390/ma14237331] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/27/2021] [Accepted: 11/28/2021] [Indexed: 12/03/2022]
Abstract
This study carried out modeling of the contact between a pair of antagonist teeth with/without individual mouthguards with different geometric configurations. Comparisons of the stress–strain state of teeth interacting through a multilayer mouthguard EVA and multilayer mouthguards with an A-silicon interlayer were performed. The influence of the intermediate layer geometry of A-silicone in a multilayer mouthguard with an A-silicon interlayer on the stress–strain state of the human dentition was considered. The teeth geometry was obtained by computed tomography data and patient dental impressions. The contact 2D problem had a constant thickness, frictional contact deformation, and large deformations in the mouthguard. The strain–stress analysis of the biomechanical model was performed by elastoplastic stress–strain theory. Four geometric configurations of the mouthguard were considered within a wide range of functional loads varied from 50 to 300 N. The stress–strain distributions in a teeth pair during contact interaction at different levels of the physiological loads were obtained. The dependences of the maximum level of stress intensity and the plastic deformation intensity were established, and the contact parameters near the occlusion zone were considered. It was found that when using a multilayer mouthguard with an A-silicone interlayer, there is a significant decrease in the stress intensity level in the hard tissues of the teeth, more than eight and four times for the teeth of the upper and lower teeth, respectively.
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8
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The Effectiveness of Dental Protection and the Material Arrangement in Custom-Made Mouthguards. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11209363] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Experimental research studies have shown that wearing a mouthguard (MG) is an effective way to prevent tooth or maxillofacial trauma. However, there is a lack of scientific information regarding how the material arrangement within the mouthguard can modify its mechanical response during an impact. Hence, this study aimed to evaluate the influence of material arrangement within custom-made mouthguards on stress transmitted to anterior teeth, bone, and soft tissue after impact. Four 3D finite element models of a human maxilla were reconstructed based on the CBCT of a young patient and analyzed according to the presence or absence of a mouthguard and the type of material arrangement within those with a mouthguard: model NMG with no mouthguard; model CMG representing the conventional arrangement with a single 4 mm-thick ethylene-vinyl acetate (EVA) foil; model FMG presenting layer arrangement with two 1 mm-thick foils of EVA in the outer shell and one 2 mm-thick foil of EVA foam in the core; model HMG presenting a 1 mm-thick compact inner and outer shell of EVA and a 2 mm wide air-filled zone in the core. Linear quasi-static analysis and frontal load were used to simulate an impact with an energy of 4.4 J. Isotropic linear elastic properties were assumed for the bone and teeth but not for the mouthguard protection and oral soft tissues. The results were evaluated and compared in terms of displacement, stretches, and stresses. All the mouthguards analyzed reduced the risk of injury to teeth and bone, reducing the displacement and stress of these structures. However, the implementation of a honeycomb structured layer allowed more significant displacement and deformation of the mouthguard’s external layer, thus promoting higher protection of the anatomic structures, namely the root dentin and the bone tissue. Nevertheless, the results also indicate that improving the mouthguard flexibility might increase the soft tissue injuries.
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Sliwkanich L, Ouanounou A. Mouthguards in dentistry: Current recommendations for dentists. Dent Traumatol 2021; 37:661-671. [PMID: 34019343 DOI: 10.1111/edt.12686] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 04/25/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022]
Abstract
Properly fitted mouthguards reduce the risk and severity of orofacial injury, to both hard and soft tissues, preventing thousands of dollars of trauma management. In this review, findings from recent research will be evaluated to discuss the strengths and limitations of the different types of mouthguards, including their indications by sport. Design, ideal dimensions, and other characteristics will also be explored. Additionally, patient education and motivation will be examined, with a focus on the dentist's role in this regard. Finally, in addition to proper oral hygiene, the importance of proper mouthguard maintenance and evaluation will be discussed. This review will therefore be able to act as a guide for dentists looking to provide patients of all ages with personal protective equipment and stay up-to-date on recent developments in this branch of the sports dentistry field.
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Affiliation(s)
- Laura Sliwkanich
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - Aviv Ouanounou
- Department of Clinical Sciences (pharmacology & Preventive Dentistry), Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
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Borges ALS, Dal Piva AMDO, Concílio LRDS, Paes-Junior TJDA, Tribst JPM. Mouthguard Use Effect on the Biomechanical Response of an Ankylosed Maxillary Central Incisor during a Traumatic Impact: A 3-Dimensional Finite Element Analysis. Life (Basel) 2020; 10:life10110294. [PMID: 33233499 PMCID: PMC7699499 DOI: 10.3390/life10110294] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 12/15/2022] Open
Abstract
(1) Background: Trauma is a very common experience in contact sports; however, there is an absence of data regarding the effect of athletes wearing mouthguards (MG) associated with ankylosed maxillary central incisor during a traumatic impact. (2) Methods: To evaluate the stress distribution in the bone and teeth in this situation, models of maxillary central incisor were created containing cortical bone, trabecular bone, soft tissue, root dentin, enamel, periodontal ligament, and antagonist teeth were modeled. One model received a MG with 4-mm thickness. Both models were subdivided into finite elements. The frictionless contacts were used and a nonlinear dynamic impact analysis was performed in which a rigid object hit the model at 1 m·s-1. For each model, an ankylosed periodontal ligament was simulated totaling 4 different situations. The results were presented in von-Mises stress maps. (3) Results: A higher stress concentration in teeth and bone was observed for the model without a MG and with ankylosed tooth (19.5 and 37.3 MPa, respectively); the most promising mechanical response was calculated for patients with healthy periodontal ligament and MG in position (1.8 and 7.8 MPa, respectively). (4) Conclusions: The MG's use is beneficial for healthy and ankylosed teeth, since it acts by dampening the generated stresses in bone, dentin, enamel and periodontal ligament. However, patients with ankylosed tooth are more prone to root fracture even when the MG is in position compared to a healthy tooth.
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Affiliation(s)
- Alexandre Luiz Souto Borges
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220690, Brazil; (A.L.S.B.); (A.M.d.O.D.P.); (T.J.d.A.P.-J.)
| | - Amanda Maria de Oliveira Dal Piva
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220690, Brazil; (A.L.S.B.); (A.M.d.O.D.P.); (T.J.d.A.P.-J.)
| | | | - Tarcisio José de Arruda Paes-Junior
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220690, Brazil; (A.L.S.B.); (A.M.d.O.D.P.); (T.J.d.A.P.-J.)
| | - João Paulo Mendes Tribst
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220690, Brazil; (A.L.S.B.); (A.M.d.O.D.P.); (T.J.d.A.P.-J.)
- Correspondence: ; Tel.: +55-3947-9000
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Tribst JPM, Dal Piva AMDO, Bottino MA, Kleverlaan CJ, Koolstra JH. Mouthguard use and TMJ injury prevention with different occlusions: A three‐dimensional finite element analysis. Dent Traumatol 2020; 36:662-669. [DOI: 10.1111/edt.12577] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 02/06/2023]
Affiliation(s)
- João Paulo Mendes Tribst
- Department of Dental Materials and Prosthodontics São Paulo State University (Unesp/SJC) São Paulo Brazil
- Department of Dental Materials Science Academic Center for Dentistry Amsterdam (ACTA) University of Amsterdam and VU University Amsterdam Amsterdam The Netherlands
| | - Amanda Maria de Oliveira Dal Piva
- Department of Dental Materials and Prosthodontics São Paulo State University (Unesp/SJC) São Paulo Brazil
- Department of Dental Materials Science Academic Center for Dentistry Amsterdam (ACTA) University of Amsterdam and VU University Amsterdam Amsterdam The Netherlands
| | - Marco Antonio Bottino
- Department of Dental Materials and Prosthodontics São Paulo State University (Unesp/SJC) São Paulo Brazil
| | - Cornelis Johannes Kleverlaan
- Department of Dental Materials Science Academic Center for Dentistry Amsterdam (ACTA) University of Amsterdam and VU University Amsterdam Amsterdam The Netherlands
| | - Jan Harm Koolstra
- Department of Oral Cell Biology and Functional Anatomy Academic Center for Dentistry Amsterdam (ACTA) University of Amsterdam and VU University Amsterdam Amsterdam The Netherlands
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Dal Piva ADO, Penteado M, Mendes Tribst J, Archangelo K, Bottino M, Souto Borges A. Influence of different restorative material and cement on the stress distribution of ceramic veneer in upper central incisor. Indian J Dent Res 2020; 31:236-240. [DOI: 10.4103/ijdr.ijdr_150_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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da Rocha DM, Tribst JPM, Ausiello P, Dal Piva AMDO, da Rocha MC, Di Nicoló R, Borges ALS. Effect of the restorative technique on load-bearing capacity, cusp deflection, and stress distribution of endodontically-treated premolars with MOD restoration. Restor Dent Endod 2019; 44:e33. [PMID: 31485429 PMCID: PMC6713078 DOI: 10.5395/rde.2019.44.e33] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 07/19/2019] [Accepted: 07/21/2019] [Indexed: 11/11/2022] Open
Abstract
Objectives To evaluate the influence of the restorative technique on the mechanical response of endodontically-treated upper premolars with mesio-occluso-distal (MOD) cavity. Materials and Methods Forty-eight premolars received MOD preparation (4 groups, n = 12) with different restorative techniques: glass ionomer cement + composite resin (the GIC group), a metallic post + composite resin (the MP group), a fiberglass post + composite resin (the FGP group), or no endodontic treatment + restoration with composite resin (the CR group). Cusp strain and load-bearing capacity were evaluated. One-way analysis of variance and the Tukey test were used with α = 5%. Finite element analysis (FEA) was used to calculate displacement and tensile stress for the teeth and restorations. Results MP showed the highest cusp (p = 0.027) deflection (24.28 ± 5.09 µm/µm), followed by FGP (20.61 ± 5.05 µm/µm), CR (17.72 ± 6.32 µm/µm), and GIC (17.62 ± 7.00 µm/µm). For load-bearing, CR (38.89 ± 3.24 N) showed the highest, followed by GIC (37.51 ± 6.69 N), FGP (29.80 ± 10.03 N), and MP (18.41 ± 4.15 N) (p = 0.001) value. FEA showed similar behavior in the restorations in all groups, while MP showed the highest stress concentration in the tooth and post. Conclusions There is no mechanical advantage in using intraradicular posts for endodontically-treated premolars requiring MOD restoration. Filling the pulp chamber with GIC and restoring the tooth with only CR showed the most promising results for cusp deflection, failure load, and stress distribution.
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Affiliation(s)
| | - João Paulo Mendes Tribst
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, Brazil.,Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Noord-Holland, The Netherlands
| | - Pietro Ausiello
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Dentistry, University of Naples Federico II, Naples, Italy
| | - Amanda Maria de Oliveira Dal Piva
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, Brazil.,Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Noord-Holland, The Netherlands
| | | | - Rebeca Di Nicoló
- Department of Pediatric and Social Dentistry, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, Brazil
| | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, Brazil
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