1
|
Liu R, Yang J, Zhu Y, Zhou X, Zhou Q, Liang T, Wang H, Luo Y, Xie Y, Liu H, Zhong Z, Peng G, Zhuang H, Ai S, Jiang L, Zheng C, Zhou Z. A forecasting model for suitable dental implantation in canine mandibular premolar region based on finite element analysis. BMC Vet Res 2024; 20:353. [PMID: 39118061 PMCID: PMC11308459 DOI: 10.1186/s12917-024-04221-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 08/02/2024] [Indexed: 08/10/2024] Open
Abstract
In recent years, dental implants have become a trend in the treatment of human patients with missing teeth, which may also be an acceptable method for companion animal dentistry. However, there is a gap challenge in determining appropriate implant sizes for different dog breeds and human. In this study, we utilized skull computed tomography data to create three-dimensional models of the mandibles of dogs in different sizes. Subsequently, implants of various sizes were designed and subjected to biomechanical finite element analysis to determine the optimal implant size. Regression models were developed, exploring the relationship between the average weight of dogs and the size of premolar implants. Our results illustrated that the regression equations for mean body weight (x, kg) and second premolar (PM2), third premolar (PM3), and fourth premolar (PM4) implant length (y, mm) in dogs were: y = 0.2785x + 7.8209, y = 0.2544x + 8.9285, and y = 0.2668x + 10.652, respectively; the premolar implant diameter (mm) y = 0.0454x + 3.3506, which may provide a reference for determine suitable clinical implant sizes for dogs.
Collapse
Affiliation(s)
- Ruiyu Liu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Jie Yang
- Sichuan Institute of Musk Deer Breeding, Chengdu, China
- Sichuan Science and Technology Resources Sharing Platform of Beagle Dog Breeding and Experimental Technology Service, Chengdu, China
| | - Yiling Zhu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Xiaoxiao Zhou
- Chengdu Center for Animal Disease Prevention and Control, Chengdu, China
| | - Qiaolin Zhou
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Ting Liang
- Sichuan Institute of Musk Deer Breeding, Chengdu, China
- Sichuan Science and Technology Resources Sharing Platform of Beagle Dog Breeding and Experimental Technology Service, Chengdu, China
| | - Huan Wang
- Sichuan Institute of Musk Deer Breeding, Chengdu, China
- Sichuan Science and Technology Resources Sharing Platform of Beagle Dog Breeding and Experimental Technology Service, Chengdu, China
| | - Yan Luo
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yue Xie
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Sichuan Agricultural University, Chengdu, China
| | - Haifeng Liu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhijun Zhong
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Guangneng Peng
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Hao Zhuang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Shengquan Ai
- New Ruipeng Pet Healthcare Group, Chengdu, China
| | | | - Chengli Zheng
- Sichuan Institute of Musk Deer Breeding, Chengdu, China.
- Sichuan Science and Technology Resources Sharing Platform of Beagle Dog Breeding and Experimental Technology Service, Chengdu, China.
| | - Ziyao Zhou
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.
- Key Laboratory of Agricultural Bioinformatics, Ministry of Education, Sichuan Agricultural University, Chengdu, China.
| |
Collapse
|
2
|
Martinello PA, Cartagena-Molina AF, Capelletti LK, Fernandes BV, Franco APGDO, Mercuri EGF, Bombarda NHC. Adding mechanobiological cell features to finite element analysis of an immediately loaded dental implant. Eur J Oral Sci 2024; 132:e12992. [PMID: 38771146 DOI: 10.1111/eos.12992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 04/25/2024] [Indexed: 05/22/2024]
Abstract
Finite element analysis (FEA) has been used to analyze the behavior of dental materials, mainly in implantology. However, FEA is a mechanical analysis and few studies have tried to simulate the biological characteristics of the healing process of loaded implants. This study used the rule of mixtures to simulate the biological healing process of immediate implants in an alveolus socket and bone-implant junction interface through FEA. Three-dimensional geometric models of the structures were obtained, and material properties were derived from the literature. The rule of mixtures was used to simulate the healing periods-immediate and early loading, in which the concentration of each cell type, based on in vivo studies, influenced the final elastic moduli. A 100 N occlusal load was simulated in axial and oblique directions. The models were evaluated for maximum and minimum principal strains, and the bone overload was assessed through Frost's mechanostat. There was a higher strain concentration in the healing regions and cortical bone tissue near the cervical portion. The bone overload was higher in the immediate load condition. The method used in this study may help to simulate the biological healing process and could be useful to relate FEA results to clinical practice.
Collapse
Affiliation(s)
| | - Andrés Felipe Cartagena-Molina
- Department of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
- Department of Dentistry, State University of Londrina, Londrina, Paraná, Brazil
| | | | | | | | | | | |
Collapse
|
3
|
Kavitha G, Sonkesriya S, Kumar KA, Almutairi FJ, Parmar PM, Parihar AS, Sonkar TP. Outcome of Implant Diameter and Length on the Distribution of Stress with Immediate Loaded Implants: A 3D Finite Element Analysis. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2023; 15:S1329-S1331. [PMID: 37693959 PMCID: PMC10485545 DOI: 10.4103/jpbs.jpbs_100_23] [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: 02/02/2023] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 09/12/2023] Open
Abstract
Objectives To assess the outcome of implant diameter and length on THE distribution of stress using a three-dimensional (3D) finite elements (FE) analysis, with immediate loading implants. Materials and Methods This study made use of a 3D FE model of an implant encased in a chunk of bone. The LEADER/ITALIA-Fix type implant was created specifically for immediate loading. To create a solid model of the implant and bone and to carry out the FE analysis, the ANSYS V.12 programme was used. Results The findings indicated that the neck of dental implants is the area of highest stress for all implant diameters and lengths, with an increase in implant length from 10 mm to 12 mm resulting in a slight raise in stress at the interface of implant-bone, and an increase in diameter from 3.75 mm to 4.25 mm having no appreciable impact on the value of stresses around dental implants. Conclusion It was concluded that an increase in length has a negative effect on stress, while a diameter increase has no discernible impact on stress values.
Collapse
Affiliation(s)
- G Kavitha
- Department of Conservative Dentistry, Sharavathi Dental College and Hospital, Shivamogga, Karnataka, India
| | - Subhash Sonkesriya
- Department of Prosthodontics and crown and Bridge, Government College of Dentistry, Indore, Madhya Pradesh, India
| | - K Anil Kumar
- Department of Prosthodontics, Saraswti Dhanwantari Dental College and Hospital, Parbani, Maharastra, India
| | - Faris Jaser Almutairi
- Assistant Professor, Separtment of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Qassim University, Kingdom of Saudi Arabia
| | - Pravin M Parmar
- Department of Prosthodontics Crown and Bridge, Dental Surgeon Class-1, General Hospital, Dist-Botad, India
| | - Anuj Singh Parihar
- Department of Periodontology, People’s Dental Academy, Bhopal, Madhya Pradesh, India
| | - Tanu Priya Sonkar
- Deportment of Prosthodontics Crown and Bridge, Rural Dental College, Loni, Maharastra, India
| |
Collapse
|
4
|
Falcinelli C, Valente F, Vasta M, Traini T. Finite element analysis in implant dentistry: State of the art and future directions. Dent Mater 2023:S0109-5641(23)00092-1. [PMID: 37080880 DOI: 10.1016/j.dental.2023.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/30/2023] [Accepted: 04/05/2023] [Indexed: 04/22/2023]
Abstract
OBJECTIVE To discuss the state of the art of Finite Element (FE) modeling in implant dentistry, to highlight the principal features and the current limitations, and giving recommendations to pave the way for future studies. METHODS The articles' search was performed through PubMed, Web of Science, Scopus, Science Direct, and Google Scholar using specific keywords. The articles were selected based on the inclusion and exclusion criteria, after title, abstract and full-text evaluation. A total of 147 studies were included in this review. RESULTS To date, the FE analysis of the bone-dental implant system has been investigated by analyzing several types of implants; modeling only a portion of bone considered as isotropic material, despite its anisotropic behavior; assuming in most cases complete osseointegration; considering compressive or oblique forces acting on the implant; neglecting muscle forces and the bone remodeling process. Finally, there is no standardized approach for FE modeling in the dentistry field. SIGNIFICANCE FE modeling is an effective computational tool to investigate the long-term stability of implants. The ultimate aim is to transfer such technology into clinical practice to help dentists in the diagnostic and therapeutic phases. To do this, future research should deeply investigate the loading influence on the bone-implant complex at a microscale level. This is a key factor still not adequately studied. Thus, a multiscale model could be useful, allowing to account for this information through multiple length scales. It could help to obtain information about the relationship among implant design, distribution of bone stress, and bone growth. Finally, the adoption of a standardized approach will be necessary, in order to make FE modeling highly predictive of the implant's long-term stability.
Collapse
Affiliation(s)
- Cristina Falcinelli
- Department of Engineering and Geology, University "G. d'Annunzio" of Chieti-Pescara, Viale Pindaro 42, Pescara 65127, Italy.
| | - Francesco Valente
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, Chieti 66100, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, Chieti 66100, Italy
| | - Marcello Vasta
- Department of Engineering and Geology, University "G. d'Annunzio" of Chieti-Pescara, Viale Pindaro 42, Pescara 65127, Italy
| | - Tonino Traini
- Department of Innovative Technologies in Medicine & Dentistry, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, Chieti 66100, Italy; Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, Chieti 66100, Italy
| |
Collapse
|
5
|
Körtvélyessy G, Szabó ÁL, Pelsőczi-Kovács I, Tarjányi T, Tóth Z, Kárpáti K, Matusovits D, Hangyási BD, Baráth Z. Different Conical Angle Connection of Implant and Abutment Behavior: A Static and Dynamic Load Test and Finite Element Analysis Study. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1988. [PMID: 36903102 PMCID: PMC10004464 DOI: 10.3390/ma16051988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/23/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Dental implants are artificial dental roots anchoring prosthetic restorations to replace natural teeth. Dental implant systems may have different tapered conical connections. Our research focused on the mechanical examination of implant-superstructure connections. Thirty-five samples with 5 different cone angles (24°, 35°, 55°, 75°, and 90°) were tested for static and dynamic loads, carried out by a mechanical fatigue testing machine. Fixing screws were fixed with a torque of 35 Ncm before measurements. For static loading, samples were loaded with a force of 500 N in 20 s. For dynamic loading, the samples were loaded for 15,000 cycles with a force of 250 ± 150 N. In both cases, the compression resulting from load and reverse torque was examined. At the highest compression load of the static tests, a significant difference (p = 0.021) was found for each cone angle group. Following dynamic loading, significant differences (p < 0.001) for the reverse torques of the fixing screw were also shown. Static and dynamic results showed a similar trend: under the same loading conditions, changing the cone angle-which determines the relationship between the implant and the abutment-had led to significant differences in the loosening of the fixing screw. In conclusion, the greater the angle of the implant-superstructure connection, the smaller the screw loosening due to loading, which may have considerable effects on the long-term, safe operation of the dental prosthesis.
Collapse
Affiliation(s)
- Győző Körtvélyessy
- Department of Oral Biology and Experimental Dental Research, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - Árpád László Szabó
- Department of Prosthodontics, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - István Pelsőczi-Kovács
- Department of Prosthodontics, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - Tamás Tarjányi
- Department of Oral Biology and Experimental Dental Research, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - Zsolt Tóth
- Department of Medical Physics and Informatics, Albert Szent-Györgyi Medical School, Faculty of Science and Informatics, University of Szeged, Korányi fasor 9, H-6720 Szeged, Hungary
| | - Krisztina Kárpáti
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - Danica Matusovits
- Department of Prosthodontics, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - Botond Dávid Hangyási
- Department of Periodontology, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| | - Zoltán Baráth
- Department of Prosthodontics, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 64-66, H-6720 Szeged, Hungary
| |
Collapse
|
6
|
Bajoghli F, Sabouhi M, Pourali M, Davoudi A. Stability of implant-abutment connection in three different systems after fatigue test. J Indian Prosthodont Soc 2022; 22:338-342. [PMID: 36511067 PMCID: PMC9709864 DOI: 10.4103/jips.jips_247_21] [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] [Received: 05/24/2021] [Revised: 10/20/2021] [Accepted: 12/20/2021] [Indexed: 11/30/2022] Open
Abstract
Aim Abutment screw loosening of implant-supported prosthesis causes a mismatch between the abutment and the implant. This screw loosening is influenced by the implant-abutment connection type, however, with contradictory results reported in different studies. The present study evaluates the stability of abutment-implant connections in three different systems before and after the fatigue test. Settings and Design Thirty implants (4.3 mm in diameter and 12 mm in length) were divided into three groups of 10: Implantium, Zimmer, and straight internal hexagonal connection (SIC) implants. Materials and Methods Two torques of 35 Ncm with an interval of 10 min were applied, followed by measuring removal torque value (RTV). The samples were re-torqued and then underwent a simulation of 1-year chewing clinical performance of dental implant under axial force of 400 N, with a frequency of 8 Hz (one million cycles). After fatigue test, the RTV was calculated and recorded. Statistical Analysis The mean RTVs obtained before and after cyclic load were analyzed by SPSS version 22 software using multivariate analysis. Results Significant differences in RTV and role of cyclic loading were found between SIC and Implantium groups (P = 0.006 and 0.021, respectively), as well as between Zimmer and SIC groups (P = 0.032 and 0.006, respectively), but not between Zimmer and Implantium groups (P = 0.771 and 0.248, respectively). Conclusion The type of connection could affect the screw loosening, the preload loss, and the implant component stability. SIC group revealed the highest RTVs before and after cyclic loading.
Collapse
Affiliation(s)
- Farshad Bajoghli
- Dental Implants Research Center, Department of Prosthodontics, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohmoud Sabouhi
- Dental Materials Research Center, Department of Prosthodontics, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohamad Pourali
- Department of Prosthodontics, School of Dentistry, Qom, Iran
| | - Amin Davoudi
- Department of Prosthodontics, School of Dentistry, Shahrekord University of Medical Sciences, Shahrekord, Iran
| |
Collapse
|
7
|
Zupancic Cepic L, Frank M, Reisinger A, Pahr D, Zechner W, Schedle A. Biomechanical finite element analysis of short-implant-supported, 3-unit, fixed CAD/CAM prostheses in the posterior mandible. Int J Implant Dent 2022; 8:8. [PMID: 35147791 PMCID: PMC8837704 DOI: 10.1186/s40729-022-00404-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 01/17/2022] [Indexed: 11/21/2022] Open
Abstract
Objective To assess the biomechanical effects of different prosthetic/implant configurations and load directions on 3-unit fixed prostheses supported by short dental implants in the posterior mandible using validated 3-D finite element (FE) models.
Methods Models represented an atrophic mandible, missing the 2nd premolar, 1st and 2nd molars, and rehabilitated with either two short implants (implant length-IL = 8 mm and 4 mm) supporting a 3-unit dental bridge or three short implants (IL = 8 mm, 6 mm and 4 mm) supporting zirconia prosthesis in splinted or single crowns design. Load simulations were performed in ABAQUS (Dassault Systèmes, France) under axial and oblique (30°) force of 100 N to assess the global stiffness and forces within the implant prosthesis. Local stresses within implant/prosthesis system and strain energy density (SED) within surrounding bone were determined and compared between configurations. Results The global stiffness was around 1.5 times higher in splinted configurations vs. single crowns, whereby off-axis loading lead to a decrease of 39%. Splinted prostheses exhibited a better stress distribution than single crowns. Local stresses were larger and distributed over a larger area under oblique loads compared to axial load direction. The forces on each implant in the 2-implant-splinted configurations increased by 25% compared to splinted crowns on 3 implants. Loading of un-splinted configurations resulted in increased local SED magnitude. Conclusion Splinting of adjacent short implants in posterior mandible by the prosthetic restoration has a profound effect on the magnitude and distribution of the local stress peaks in peri-implant regions. Replacing each missing tooth with an implant is recommended, whenever bone supply and costs permit.
Collapse
Affiliation(s)
- Lana Zupancic Cepic
- Department of Prosthodontics, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Martin Frank
- Institute of Lightweight Design and Structural Biomechanics, TU Wien, Vienna, Austria
| | - Andreas Reisinger
- Division Biomechanics, Department of Anatomy and Biomechanics, Karl Landsteiner University of Health Sciences, Krems, Austria
| | - Dieter Pahr
- Division Biomechanics, Department of Anatomy and Biomechanics, Karl Landsteiner University of Health Sciences, Krems, Austria
| | - Werner Zechner
- Department of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Andreas Schedle
- Competence Centre Dental Materials, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
| |
Collapse
|
8
|
Zincir ÖÖ, Parlar A. Comparison of stresses in monoblock tilted implants and conventional angled multiunit abutment-implant connection systems in the all-on-four procedure. BMC Oral Health 2021; 21:646. [PMID: 34915864 PMCID: PMC8680270 DOI: 10.1186/s12903-021-02023-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 12/13/2021] [Indexed: 11/10/2022] Open
Abstract
Background The All-on-four dental implant method is an implantology method designed to provide a comfortable prosthetic treatment option by avoiding advanced surgical procedures. This research aims to compare and evaluate the stress and tension values in conventional angled multiunit abutment-implant connection systems and monoblock dental implants used in the all-on-four procedure with finite element analysis. Methods Two master models were created by placing four implants connected to multiunit abutments (group A) in the interforaminal region of a completely edentulous mandible and four monoblock implants (group B) in the same region of another completely edentulous mandible. Group A implants were classified according to their diameter as follows: 3.5 mm (M1A), 4.0 mm (M2A), and 4.5 mm (M3A). Similarly, group B implants were classified as M1B, M2B, and M3B. In the six models rehabilitated with acrylic fixed prostheses, a 100 N force was applied to the anterior implant region, and a 250 N force was applied to the posterior cantilever in both axial and 30° oblique directions. Von Mises stresses were analyzed in the bone and implant regions of all models. Results M1A and M1B, M2A and M2B, and M3A and M3B were compared with each other under axial and oblique forces. The maximum Von Mises stresses in the bone around implants and the prosthesis screws, and the maximum and minimum principal stresses in the cortical and trabecular bone in group A models were significantly higher than those in group B models. Conclusions In monoblock implant systems under axial and oblique forces, higher stress is accumulated in the bone, prosthesis screw and implant compared to multiunit abutment-implant connection systems.
Collapse
Affiliation(s)
- Özge Özdal Zincir
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul Gelisim University, Istanbul, Turkey.
| | - Ateş Parlar
- Department of Periodontology, Private Primadent Oral, Dental Health and Implantology Center, Ankara, Turkey
| |
Collapse
|
9
|
Niroomand MR, Toutounchi H, Mousavi S. How to design a more stable dental implant: A topology optimization approach. Proc Inst Mech Eng H 2021; 236:341-348. [PMID: 34696643 DOI: 10.1177/09544119211048012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The body shape design is one of the most influential factors in the success of dental implants. This study presents a strategy to design the geometrical features of a threaded implant. The topology optimization technique is applied to identify appropriate spaces in the implant body to be removed for bone growth. The exact shape, position, and dimensions of the spaces are determined using a finite element model. This model consists of a mandibular segment, implant, abutment, and crown. During the optimization process, some grooves and holes are created in the implant by removing redundant materials. Bone growth into these spaces causes mechanical locking between the implant and surrounding bone. The smoothing process is performed following the optimization to remove stress concentration. The results indicate that this design strategy reduces the maximum displacement of the implant by approximately 20%. Moreover, a reduction in the implant's volume and an increase in the contact area between the implant and bone are obtained. All mentioned issues would increase the stability and reduce the risk of implant loosening. Finally, using conventional production methods, the optimal implant was produced from titanium alloy to demonstrate the possibility of production of the proposed design.
Collapse
Affiliation(s)
| | - Hamidreza Toutounchi
- Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| | - Sayedali Mousavi
- Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| |
Collapse
|
10
|
The influence of crown-to-implant ratio in single crowns on clinical outcomes: A systematic review and meta-analysis. J Prosthet Dent 2021; 126:497-502. [DOI: 10.1016/j.prosdent.2020.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/02/2020] [Accepted: 06/02/2020] [Indexed: 01/23/2023]
|
11
|
Dam VV, Trinh HA, Dung DT, Hai TD. Applications of Finite Element in Implant Dentistry and Oral Rehabilitation. Open Dent J 2021. [DOI: 10.2174/1874210602115010392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Finite element is widely applied in dentistry to study the stress distributions on adjoining bone, the biomechanics of dental implant and bone; implant and bone interface and study its fatigue behaviors of the implant. This article presents various applications of finite element in implant dentistry. Available articles were searched and reviewed from March 1980 till September 2020 from Pubmed, Scopus, Google Scholar, and Science direct. Relevant studies were included and critically analyzed. Finite element is an important tool in implant dentistry to study the stress distributions on adjoining bone, the biomechanics of dental implant and bone; implant and bone interface, and fatigue behaviors.
Collapse
|
12
|
Comparative analysis of stress distribution in one-piece and two-piece implants with narrow and extra-narrow diameters: A finite element study. PLoS One 2021; 16:e0245800. [PMID: 33539392 PMCID: PMC7861395 DOI: 10.1371/journal.pone.0245800] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 01/07/2021] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES The aim of this in vitro study was to evaluate the stress distribution on three implant models with narrow and extra-narrow diameters using the finite element method (FEA). MATERIALS AND METHODS Dental implants of extra-narrow diameter of 2.5 mm for a one-piece implant (group G1), a narrow diameter of 3.0 mm for a one-piece implant (group G2) and a narrow diameter of 3.5 mm for a two-piece implant with a Morse taper connection (group G3). A three-dimensional model was designed with cortical and cancellous bone, a crown and an implant/abutment set of each group. Axial and angled (30°) loads of 150 N was applied. The equivalent von Mises stress was used for the implants and peri-implant bone plus the Mohr-Coulomb analysis to confirm the data of the peri-implant bone. RESULTS In the axial load, the maximum stress value of the cortical bone for the group G1 was 22.35% higher than that the group G2 and 321.23% than the group G3. Whereas in angled load, the groups G1 and G2 showing a similar value (# 3.5%) and a highest difference for the group G3 (391.8%). In the implant structure, the group G1 showed a value of 2188MPa, 93.6% higher than the limit. CONCLUSIONS The results of this study show that the extra-narrow one-piece implant should be used with great caution, especially in areas of non-axial loads, whereas the one- and two-piece narrow-diameter implants show adequate behavior in both directions of the applied load.
Collapse
|
13
|
Robau-Porrua A, Pérez-Rodríguez Y, Soris-Rodríguez LM, Pérez-Acosta O, González JE. The effect of diameter, length and elastic modulus of a dental implant on stress and strain levels in peri-implant bone: A 3D finite element analysis. Biomed Mater Eng 2020; 30:541-558. [PMID: 31903978 DOI: 10.3233/bme-191073] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study investigated the effect of three different parameters of a dental implant on stress and strain values in the peri-implant bone by finite element analysis. In this work, the effect of diameter, length and elastic modulus on the biomechanical behavior of a new dental implant was simulated using the finite element method. A three-dimensional model of a mandible segment corresponding to the premolar region and twelve dental implant models were obtained. Loads in three directions were distributed on the surface of the coronal area of the dental implants. The dental implant models were obtained in the FreeCAD 0.16 software and the simulations were made using the Abaqus/CAE software. In all cases, higher stress concentrations were obtained in the peri-implant cortical bone between 40.6 and 62.8 MPa, while the highest levels of strain were observed in the peri-implant trabecular bone between 0.002544 and 0.003873. In general, the highest von Mises equivalent stress values were observed in the peri-implant cortical bone. However, in this bone, both the maximum von Mises equivalent stress values and the von Mises strain are similar or inferior to those reported in different studies by finite element for other models of dental implants under immediate loading. Maximum von Mises strain values were observed in peri-implant trabecular bone. However, in this bone strains levels were obtained that maintain bone density or increase it. The effect of the three simulated variables (implant diameter, length, and elastic modulus) have a statistically significant influence on the von Mises equivalent stress and in von Mises strain values.
Collapse
Affiliation(s)
- Amanda Robau-Porrua
- Department of Technology of Machinery Construction, Mechanical Engineering Faculty, Technological University of Havana José Antonio Echeverría, Cuba
| | | | - Laura M Soris-Rodríguez
- Department of Technology of Machinery Construction, Mechanical Engineering Faculty, Technological University of Havana José Antonio Echeverría, Cuba
| | | | - Jesús E González
- Department of Ceramic and Metallic Biomaterials, Biomaterials Center, University of Havana, Cuba
| |
Collapse
|
14
|
Sesha MR, Sunduram R, Eid Abdelmagyd HA. Biomechanical Evaluation of Stress Distribution in Subcrestal Placed Platform-switched Short Dental Implants in D4 Bone: In Vitro Finiteelement Model Study. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2020; 12:S134-S139. [PMID: 33149444 PMCID: PMC7595558 DOI: 10.4103/jpbs.jpbs_44_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 03/10/2020] [Accepted: 03/10/2020] [Indexed: 11/04/2022] Open
Abstract
The present study was carried out to assess stress distribution in the maxillary posterior bone region (D4 bone) with the help of a short platform switched subcrestal dental implants using the FEM model. Missing teeth surfaces related to the maxillary posterior region were stimulated. The bone model had a cancellous core of (0.5 mm) which represents D4 bone. A 7.5x4.6 mm screw type implant system with 3.5 platform switch abutment was selected. ANSYS WORKBENCH was used to model all the finite element structures. Force of 100 N was tested and adapted at an angle of 0º, 15º, 30º on the tooth model. Overall results from the current study showed that a high amount of stress was seen in cortical than in relation to cancellous bone. Stress values reduced from equicrestal to subcrestal (2 mm) placement of dental implants irrespective of angulation of load from 0o to 30o in both types of bone. However higher stress values were seen when force was applied in an oblique direction (30o) in comparison to a vertical load (0o). Least amount of stress was noticed when platform switched implants were placed 0.5 mm subcrestatlly irrespective of angulations of a load. Platform switched short subcrestal implants reduced the stress in the D4 cortical bone than in contrary equicrestal implant placement. This results in the preservation of marginal bone leading to implant success.
Collapse
Affiliation(s)
- Manchala R Sesha
- Department of Periodontics, College of Dentistry, Gulf Medical University, Ajman, UAE
| | - Rajashekar Sunduram
- Department of Periodontics, Rajah Muthiah Dental College & Hospital, Annamalai Nagar, Tamil Nadu, India
| | | |
Collapse
|
15
|
de Paula Miranda RB, Leite TP, Pedroni ACF, Marques MM, de Lima NB, Marchi J, Cesar PF. Effect of titania addition and sintering temperature on the microstructure, optical, mechanical and biological properties of the Y-TZP/TiO 2 composite. Dent Mater 2020; 36:1418-1429. [PMID: 32958310 DOI: 10.1016/j.dental.2020.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/16/2020] [Accepted: 08/29/2020] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aims of this study were: 1) to evaluate the effect of sintering temperature on microstructure, density and flexural strength of a 3Y-TZP/TiO2 composite containing 12.5 wt% of TiO2 compared to 3Y-TZP specimens (control); 2) to compare 3Y-TZP with the experimental 3Y-TZP/TiO2 composite, both sintered at 1400 °C, with respect to the following parameters: optical properties, characteristic strength, Weibull modulus, fatigue behavior, induction of osteoblasts proliferation and differentiation (mineralization nodules formation). METHODS The 3Y-TZP and 3Y-TZP/TiO2 powders were uniaxially pressed and sintered at 1200 °C, 1300 °C, 1400 °C or 1500 °C for one hour in a furnace. The microstructural analysis consisted of X-ray diffraction and scanning electron microscopy. The density was measured by the Archimedes' principle and the flexural strength was obtained by the biaxial flexure test. The optical properties were measured using a spectrophotometer operating in the visible light wavelength range. The step-stress accelerated life testing was performed by the pneumatic mechanical cycler and the biological behavior achieved by using osteoblast-like cells (Osteo-1 cell line). RESULTS Tetragonal zirconia was identified in all groups and cubic zirconia was identified only at 3Y-TZP group. The addition of TiO2 decreased the values of density and flexural strength of the composite 3Y-TZP/TiO2 in relation to 3Y-TZP regardless of the sintering temperature. The color difference between the two materials was not significant regarding L*a*b* parameters. The composite showed higher probability of failure, and induced higher proliferation and differentiation than control. SIGNIFICANCE The composite developed have good aesthetic and biologics properties. However, its microstructure and mechanical properties need to be improved for future dental implant applications.
Collapse
Affiliation(s)
| | - Tayná Paula Leite
- Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ana Clara Fagundes Pedroni
- Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Márcia Martins Marques
- Programa de Pós-Graduação em Odontologia, Universidade Ibirapuera, São Paulo, SP, Brazil
| | - Nelson Batista de Lima
- Centro de Ciência e Tecnologia de Materiais, Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil
| | - Juliana Marchi
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
| | - Paulo Francisco Cesar
- Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil.
| |
Collapse
|
16
|
de Souza Rendohl E, Brandt WC. Stress distribution with extra-short implants in an angled frictional system: A finite element analysis study. J Prosthet Dent 2020; 124:728.e1-728.e9. [PMID: 32694020 DOI: 10.1016/j.prosdent.2020.04.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/25/2020] [Accepted: 04/27/2020] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM Short and extra-short implants with Morse taper connections were developed to avoid grafting procedures. How the stresses around these implants differ with abutments of different angulations is unclear. PURPOSE The purpose of this finite element study was to analyze the stress distribution in different structures (abutment, implant, and bone) of an extra-short implant with a Morse taper connection to the abutment (Arcsys-FGM-Brazil) (5.0×5.0 mm and 4.3×5.0 mm) when different abutment degrees were used. MATERIAL AND METHODS Eight 3D models were designed according to each group under analysis: group 5DS (5.0×5.0-mm implants with straight abutment), group 5DA (5.0×5.0-mm implants with 20-degree angled abutments), group 4DS (4.3×5.0-mm implants with straight abutments), and group 4DA (4.3×5.0-mm implants with 20-degree angled abutments). Axial and oblique loads of 150 N were applied on the mandibular molar crowns. RESULTS The oblique loads and angled abutments had higher stress values in the whole model (implant, abutment, and bone) than the axial loads and straight abutments. Implants with a different diameter had almost the same stress distribution on the implant, abutment, and bone. The yield limit was exceeded in the cortical bone with oblique loads and was also exceeded in implant models when an angled abutment with oblique loads was used. CONCLUSIONS Extra-short implants with Morse taper connections to the abutment had higher stress concentrations with an angled abutment on oblique loads, and the peri-implant bone was the most damaged structure.
Collapse
Affiliation(s)
| | - William Cunha Brandt
- Full Professor, Department of Implantology, University of Santo Amaro, UNISA, Sao Paulo, Brazil
| |
Collapse
|
17
|
Kilic E, Doganay O. Evaluation of Stress in Tilted Implant Concept With Variable Diameters in the Atrophic Mandible: Three-Dimensional Finite Element Analysis. J ORAL IMPLANTOL 2020; 46:19-26. [PMID: 31647683 DOI: 10.1563/aaid-joi-d-19-00066] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The beneficial mechanical properties provided by greater diameter or short implants increases their usage in the tilted implant concept. The aim of the present study is to compare the stress distribution of 4 different treatment models including variable implant numbers and diameters under a static loading protocol in the atrophic mandible using 3-dimensional finite element analysis. Three models included 2 tilted and 2 vertically positioned implants with different diameters, whereas 2 distally placed short implants were added to the fourth model. The von Mises stress as well as the maximum and minimum principal stress values were evaluated after applying 200 N bilateral oblique loads to the first molar teeth with the inclination of 45° to the longitudinal axis. Tilted implants were associated with higher stress values when compared with vertical implants in all models. The lowest stress values were obtained in the fourth model, including short implants. Although all stress values showed slight increases by descending implant diameters, the stress values of the model including implants with 3.3-mm diameter were within physiologic limits. All in all, an increasing number or diameter of implants may have a positive effect on implant survival. In addition, when narrow-diameter implants need to be inserted in the tilted implant concept, combination with short implants may be recommended for long-term success.
Collapse
Affiliation(s)
- Erdem Kilic
- Bezmialem Vakıf University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul, Turkey
| | - Ozge Doganay
- Bezmialem Vakıf University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul, Turkey
| |
Collapse
|
18
|
Bataineh K, Al Janaideh M. Effect of different biocompatible implant materials on the mechanical stability of dental implants under excessive oblique load. Clin Implant Dent Relat Res 2019; 21:1206-1217. [DOI: 10.1111/cid.12858] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 10/01/2019] [Accepted: 10/07/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Khaled Bataineh
- Department of Mechanical EngineeringJordan University of Science and Technology Irbid Jordan
| | - Mohammad Al Janaideh
- Department of Mechanical EngineeringJordan University of Science and Technology Irbid Jordan
| |
Collapse
|
19
|
Chatterjee S, Sarkar S, Kalidindi SR, Basu B. Periprosthetic biomechanical response towards dental implants, with functional gradation, for single/multiple dental loss. J Mech Behav Biomed Mater 2019; 94:249-258. [PMID: 30928669 DOI: 10.1016/j.jmbbm.2019.03.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 02/28/2019] [Accepted: 03/02/2019] [Indexed: 01/23/2023]
Abstract
The differences in shape and stiffness of the dental implants with respect to the natural teeth (especially, dental roots) cause a significant alteration of the periprosthetic biomechanical response, which typically leads to bone resorption and ultimately implant loosening. In order to avoid such clinical complications, the implant stiffness needs to be appropriately adapted. In this study, hollow channels were virtually introduced within the designed implant screws for reduction of the overall stiffness of the prototype. In particular, two opposing radial gradients of increasing hollow channel diameters, i.e., outside to inside (Channel 1) and inside to outside (Channel 2) were considered. Two clinical situations of edentulism were addressed in this finite element-based study, and these include a) loss of the first molar, and b) loss of all the three molars. Consequently, two implantation approaches were simulated for multiple teeth loss - individual implantation and implant supported dental bridge. The effects of implant length, approach and channel distribution on the biomechanical response were evaluated in terms of the von Mises stress within the interfacial periprosthetic bone, under normal masticatory loading. The results of our FE analysis clearly reveal significant variation in periprosthetic bone stress between the different implant designs and approaches. An implant screw length of 11 mm with the Channel 2 configuration was found to provide the best biomechanical response. This study also revealed that the implant supported dental bridge approach, which requires lower bone invasion, results in favorable biomechanical response in case of consecutive multiple dental loss.
Collapse
Affiliation(s)
- Subhomoy Chatterjee
- Materials Research Centre, Indian Institute of Science, Bengaluru 560012, Karnataka, India; Translational Center on Biomaterials for Orthopaedic and Dental Applications, Indian Institute of Science, Bengaluru 560012, Karnataka, India.
| | - Sulagna Sarkar
- Materials Research Centre, Indian Institute of Science, Bengaluru 560012, Karnataka, India; Department of Metallurgical and Material Engineering, Jadavpur University, Kolkata 700032, West Bengal, India.
| | - Surya R Kalidindi
- Materials Research Centre, Indian Institute of Science, Bengaluru 560012, Karnataka, India; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, North Avenue, Atlanta, GA 30332, USA.
| | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bengaluru 560012, Karnataka, India; Translational Center on Biomaterials for Orthopaedic and Dental Applications, Indian Institute of Science, Bengaluru 560012, Karnataka, India; Centre for BioSystems and Engineering, Indian Institute of Science, Bengaluru 560012, Karnataka, India.
| |
Collapse
|
20
|
Waldecker M, Rues S, Rammelsberg P, Bömicke W. Validation of in-vitro tests of zirconia-ceramic inlay-retained fixed partial dentures: A finite element analysis. Dent Mater 2019; 35:e53-e62. [PMID: 30686709 DOI: 10.1016/j.dental.2019.01.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/13/2018] [Accepted: 01/13/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE In the past, discrepancies between laboratory results and clinical behavior have been observed for all-ceramic restorations. This analysis of fracture resistance of zirconia-based inlay-retained fixed partial dentures (IRFPDs) aimed at identifying correlations between an in-vitro test setup and the clinical situation. The effects of tooth material, tooth mobility, restoration design, load direction, and different cements were taken into account. METHODS The in-vitro test model and IRFPD were reverse engineered (Geomagic DesignX) and meshed predominantly with hexahedral elements (approx. 230,000 elements). Homogenous, linear-elastic behavior was assumed for all materials. On the basis of the calculated stresses (ANSYS 18.2) and already known strength distributions for the restorative materials fracture resistance of the complete restoration and force at initial damage (fracture within the veneer) was estimated on the basis of the principal stress hypothesis. Differences depending on the assumed clinical situation and effects of different variables on fracture resistance were evaluated. RESULTS All variables tested in the finite element analysis affected the calculated fracture resistance of the IRFPD. Use of resin teeth led to an underestimation of fracture resistance by up to -57%, whereas fracture resistance of IRFPDs on metal abutment teeth was close to the clinical reference (-6% to +15%). Good correlation between the clinical scenario and that using metal teeth could only be achieved when the natural resilience of the abutment teeth was simulated. SIGNIFICANCE When testing fracture resistance of zirconia-based IRFPDs, metal abutment teeth in combination with simulated tooth resilience can reflect the clinical situation accurately.
Collapse
Affiliation(s)
- M Waldecker
- Department of Prosthodontics, Heidelberg University Hospital, University of Heidelberg, Heidelberg, Germany.
| | - S Rues
- Department of Prosthodontics, Heidelberg University Hospital, University of Heidelberg, Heidelberg, Germany
| | - P Rammelsberg
- Department of Prosthodontics, Heidelberg University Hospital, University of Heidelberg, Heidelberg, Germany
| | - W Bömicke
- Department of Prosthodontics, Heidelberg University Hospital, University of Heidelberg, Heidelberg, Germany
| |
Collapse
|
21
|
Complete mechanical characterization of an external hexagonal implant connection: in vitro study, 3D FEM, and probabilistic fatigue. Med Biol Eng Comput 2018; 56:2233-2244. [PMID: 29949022 DOI: 10.1007/s11517-018-1846-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 05/12/2018] [Indexed: 10/14/2022]
Abstract
The aim of this study was to fully characterize the mechanical behavior of an external hexagonal implant connection (ø3.5 mm, 10-mm length) with an in vitro study, a three-dimensional finite element analysis, and a probabilistic fatigue study. Ten implant-abutment assemblies were randomly divided into two groups, five were subjected to a fracture test to obtain the maximum fracture load, and the remaining were exposed to a fatigue test with 360,000 cycles of 150 ± 10 N. After mechanical cycling, all samples were attached to the torque-testing machine and the removal torque was measured in Newton centimeters. A finite element analysis (FEA) was then executed in ANSYS® to verify all results obtained in the mechanical tests. Finally, due to the randomness of the fatigue phenomenon, a probabilistic fatigue model was computed to obtain the probability of failure associated with each cycle load. FEA demonstrated that the fracture corresponded with a maximum stress of 2454 MPa obtained in the in vitro fracture test. Mean life was verified by the three methods. Results obtained by the FEA, the in vitro test, and the probabilistic approaches were in accordance. Under these conditions, no mechanical etiology failure is expected to occur up to 100,000 cycles. Graphical abstract ᅟ.
Collapse
|