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Kurt A, Yaylacı M, Dizdar A, Naralan ME, Yaylacı EU, Öztürk Ş, Çakır B. Evaluation of the effect on the permanent tooth germ and the adjacent teeth by finite element impact analysis in the traumatized primary tooth. Int J Paediatr Dent 2024. [PMID: 38584350 DOI: 10.1111/ipd.13183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/27/2024] [Accepted: 03/10/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND One of the primary concerns in the paediatric emergencies is traumatic dental injuries. OBJECTIVE This study aimed to create trauma in primary teeth and reveal its effects finite element analysis. DESIGN Three-dimensional models were created using cone-beam computed tomography images, representing a maxillary primary central incisor. An impact force moving at a speed of 10 m/s was simulated on the labial tooth surface in two directions: buccal and incisal. RESULTS The stress and deformation experienced in the adjacent tooth due to the primary tooth were higher than those generated in the permanent tooth. Forces applied in the incisal direction resulted in higher levels of stress and deformation in the permanent tooth germ. The difference between the stress and deformation values in primary teeth in the forces applied in the buccal and incisal directions is 21% and 75%, respectively; in the permanent tooth germ, this difference was 233% and 100%, respectively. CONCLUSIONS Based on the findings of this study, it is crucial to thoroughly evaluate not only the affected primary tooth but also the adjacent teeth and the permanent tooth germ in traumatic dental injuries. This comprehensive examination allows for the anticipation and management of potential long-term problems.
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Affiliation(s)
- Ayça Kurt
- Faculty of Dentistry, Department of Pediatric Dentistry, Recep Tayyip Erdogan University, Rize, Turkey
| | - Murat Yaylacı
- Biomedical Engineering MSc Program, Recep Tayyip Erdogan University, Rize, Turkey
- Faculty of Engineering and Architecture, Department of Civil Engineering, Recep Tayyip Erdogan University, Rize, Turkey
- Turgut Kıran Maritime Faculty, Recep Tayyip Erdogan University, Rize, Turkey
| | - Ayberk Dizdar
- Department of Biomedical Engineering, Kocaeli University, Kocaeli, Turkey
| | - Muhammed Enes Naralan
- Faculty of Dentistry, Department of Oral and Dentomaxillofacial Radiology, Recep Tayyip Erdogan University, Rize, Turkey
| | - Ecren Uzun Yaylacı
- Technology Transfer Office, Recep Tayyip Erdogan University, Rize, Turkey
| | - Şevval Öztürk
- Faculty of Engineering and Architecture, Department of Civil Engineering, Recep Tayyip Erdogan University, Rize, Turkey
| | - Binali Çakır
- Faculty of Dentistry, Department of Oral and Dentomaxillofacial Radiology, Atatürk University, Erzurum, Turkey
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Tian T, Huang HY, Wang W, Shi B, Zheng Q, Li CH. Three-dimensional finite element analysis of the effect of alveolar cleft bone graft on the maxillofacial biomechanical stabilities of unilateral complete cleft lip and palate. Biomed Eng Online 2022; 21:31. [PMID: 35596229 PMCID: PMC9123812 DOI: 10.1186/s12938-022-01000-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: 09/30/2021] [Accepted: 05/16/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND The objective is to clarify the effect of alveolar cleft bone graft on maxillofacial biomechanical stabilities, the key areas when bone grafting and in which should be supplemented with bone graft once bone resorption occurred in UCCLP (unilateral complete cleft lip and palate). METHODS Maxillofacial CAD (computer aided design) models of non-bone graft and full maxilla cleft, full alveolar cleft bone graft, bone graft in other sites of the alveolar cleft were acquired by processing the UCCLP maxillofacial CT data in three-dimensional modeling software. The maxillofacial bone EQV (equivalent) stresses and bone suture EQV strains under occlusal states were obtained in the finite element analysis software. RESULTS Under corresponding occlusal states, the EQV stresses of maxilla, pterygoid process of sphenoid bone on the corresponding side and anterior alveolar arch on the non-cleft side were higher than other maxillofacial bones, the EQV strains of nasomaxillary, zygomaticomaxillary and pterygomaxillary suture on the corresponding side were higher than other maxillofacial bone sutures. The mean EQV strains of nasal raphe, the maximum EQV stresses of posterior alveolar arch on the non-cleft side, the mean and maximum EQV strains of nasomaxillary suture on the non-cleft side in full alveolar cleft bone graft model were all significantly lower than those in non-bone graft model. The mean EQV stresses of bilateral anterior alveolar arches, the maximum EQV stresses of maxilla and its alveolar arch on the cleft side in the model with bone graft in lower 1/3 of the alveolar cleft were significantly higher than those in full alveolar cleft bone graft model. CONCLUSIONS For UCCLP, bilateral maxillae, pterygoid processes of sphenoid bones and bilateral nasomaxillary, zygomaticomaxillary, pterygomaxillary sutures, anterior alveolar arch on the non-cleft side are the main occlusal load-bearing structures before and after alveolar cleft bone graft. Alveolar cleft bone graft mainly affects biomechanical stabilities of nasal raphe and posterior alveolar arch, nasomaxillary suture on the non-cleft side. The areas near nasal floor and in the middle of the alveolar cleft are the key sites when bone grafting, and should be supplemented with bone graft when the bone resorbed in these areas.
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Affiliation(s)
- Tao Tian
- West China School of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China
| | - Han-Yao Huang
- West China School of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China.,West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China
| | - Wei Wang
- Urumql DW Innovation InfoTech Co., Ltd., Urumqi, 830000, Xinjiang Uygur Autonomous Region, The People's Republic of China
| | - Bing Shi
- West China School of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China.,West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China
| | - Qian Zheng
- West China School of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China. .,West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China.
| | - Cheng-Hao Li
- West China School of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China. .,West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province, The People's Republic of China.
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Ciancia S, Lucantonio A, Vannozzi L, Pedrazzini GA, Ricotti L. Thermal Analysis of Paraffin-Embedded Tissue Blocks for Anatomic Pathology Processes. J Biomech Eng 2021; 143:094501. [PMID: 33764437 DOI: 10.1115/1.4050645] [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: 09/25/2020] [Indexed: 11/08/2022]
Abstract
We analyze temperature dynamics in anatomic pathology samples to identify the most efficient refrigeration method and to predict the time available for optimal sectioning before sample heating, thus getting appropriate information for a correct diagnosis by anatomopathologists. A thermal finite element (FE) analysis was carried out with comsolmultiphysics to evaluate temperature variations in paraffin-embedded tissues, i.e., muscle, bone and fat, and the corresponding thermal stresses. Experiments with different tissues and thermocouple-based measurements allowed validating the FE simulations. Simulations allowed to estimate the time needed to bring the sample at the optimal temperature for sectioning (-8 to -4 °C) in different conditions: refrigeration on a cold plate, refrigeration in a cooled environment, and refrigeration in an environment with forced convection. Among the three cooling methods tested, the forced convection at -20 °C and with an air-flow speed of 5 m/s resulted in the shortest cooling time. As compared to the other methods, thermal stresses can be modulated by varying the air-flow speed. For the different conditions, the time needed for the surface of the tissue block to exit from a temperature corresponding to an optimal cutting, when leaving the sample exposed to room temperature after refrigeration, ranged from 12 to 310 s. We quantify the time needed to adequately refrigerate paraffin-embedded tissue samples and the time available before they leave the optimal temperature window for sectioning. We also evaluate the maximum stress attained in the paraffin block during the cooling and the heating transients. This information will help optimize anatomic pathology processes.
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Affiliation(s)
- Sabrina Ciancia
- Department of Excellence in Robotics & AI, The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56127, Italy
| | - Alessandro Lucantonio
- Department of Excellence in Robotics & AI, The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56127, Italy
| | - Lorenzo Vannozzi
- Department of Excellence in Robotics & AI, The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56127, Italy
| | | | - Leonardo Ricotti
- Department of Excellence in Robotics & AI, The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa 56127, Italy
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Bonab MF, Mojra A, Shirazi M. A numerical-experimental study on thermal evaluation of orthodontic tooth movement during initial phase of treatment. J Therm Biol 2019; 80:45-55. [PMID: 30784487 DOI: 10.1016/j.jtherbio.2019.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/02/2019] [Accepted: 01/06/2019] [Indexed: 10/27/2022]
Abstract
The most desired target of orthodontic treatment is tooth movement as a result of application of efficient force system. In this study, effect of tooth loading is studied on temperature profile around the tooth at early stages of treatment. The basis of temperature variation is increase of cell number and activities in periodontium as a result of compression and tension of this layer. Highest cellular activities occur in the beginning of loading procedure and aim to reduce mechanical stress in the periodontium which finally ends up with orthodontic tooth movement during couple of years. To find out the correlation between temperature variation and the applied force, in vivo experiments are conducted on ten rats and temperature is measured in specific time periods. It is observed that temperature is higher in direction of the net force about 0.3℃. Next, numerical finite element analysis is carried out on the rat tooth model. Mechanical stress results show that regions with compressive stress have rather high temperature in the experiments. Mechanical stress on periodontium-bone interface is multiplied by a coefficient to simulate cellular activities on this boundary as a heat source and thermal analysis is carried out to obtain temperature profile. The thermo-mechanical coefficient is identified for each rat by imposing the experimental temperatures on numerical outputs. For assessment of a treatment efficiency and deduction of the applied force, temperatures could be measured experimentally and compared with the corresponding numerical analysis temperature result obtained by employing the thermo-mechanical coefficient found earlier for each rat.
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Affiliation(s)
- M Fakhimi Bonab
- Department of Mechanical Engineering, K. N. Toosi University of Technology, 15 Pardis St., Tehran 1991943344, Iran.
| | - A Mojra
- Department of Mechanical Engineering, K. N. Toosi University of Technology, 15 Pardis St., Tehran 1991943344, Iran.
| | - M Shirazi
- Department of Orthodontics and Dental Research Centre, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
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Vilela ABF, Soares PBF, Almeida GA, Veríssimo C, Rodrigues MP, Versluis A, Soares CJ. Three‐dimensional finite element stress analysis of teeth adjacent to a traumatized incisor. Dent Traumatol 2018; 35:128-134. [DOI: 10.1111/edt.12453] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Andomar B. F. Vilela
- Department of Operative Dentistry and Dental MaterialsSchool of DentistryFederal University of Uberlândia Uberlândia Minas Gerais Brazil
| | - Priscilla B. F. Soares
- Department of Periodontology and ImplantologySchool of DentistryFederal University of Uberlândia Minas Gerais Brazil
| | - Guilherme A. Almeida
- Department of OrthodonitcsSchool of DentistryFederal University of Uberlândia Minas Gerais Brazil
| | - Crisnicaw Veríssimo
- Department of Operative Dentistry and Dental MaterialsSchool of DentistryFederal University of Goiás Goiás Brazil
| | - Monise P. Rodrigues
- Department of Operative Dentistry and Dental MaterialsSchool of DentistryFederal University of Uberlândia Uberlândia Minas Gerais Brazil
| | - Antheunis Versluis
- Department of Bioscience ResearchUniversity of Tennessee Health Science CenterCollege of Dentistry Memphis Tennessee
| | - Carlos J. Soares
- Department of Operative Dentistry and Dental MaterialsSchool of DentistryFederal University of Uberlândia Uberlândia Minas Gerais Brazil
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