The interaction between third molars and surrounding periapical tissues in mandibular stress distribution during high-impact trauma: a finite element study.

IF 1.8 3区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
C-B Nogueira, F-W Costa, F-S Carvalho, T-P Bezerra, I-C Neto, F-I Júnior, E-C Soares
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Abstract

Background: The presence of mandibular third molars has been associated with the risk of mandibular fractures, highlighting the need for comprehensive studies considering the interaction with other mandibular structures. This study investigates how mandibular third molars and neighboring tissues can influence the structural fragility of the mandible using finite element analysis.

Material and methods: A finite element analysis study following the guidelines proposed by RIFEM 1.0 was performed using three previously created mandible models: Model A, without right and left third molars; Model B, without one third molar; Model C, with bilateral presence of third molars. A 2452N force was applied to the right mandibular body in a virtual environment, allowing for a structural analysis of each mandible.

Results: Models without third molars and with only one third molar showed similar energy dissipation patterns, contrasting with the model with both third molars. The presence of third molars influenced the magnitude and distribution of stress, highlighting fragility points in specific areas such as the lingual surface, the condyles bilaterally (models without and with one contralateral third molar to trauma), and the distal cervical region of the second molar (third molar absent), as well as significantly showed the path of energy towards the contralateral side of the trauma with a concentration of energy at the contact points of virtually all teeth present immediately after impact.

Conclusions: The presence of mandibular third molars influenced the distribution and magnitude of stress within the mandible during a simulated high-impact trauma. Models with third molars exhibit distinct stress patterns, with fragility points appearing in critical areas such as the lingual surface, condyles, and second molar regions. These findings suggest that the presence of third molars increases the structural fragility of the mandible, potentially elevating the risk of mandibular fractures, especially in the context of traumatic impacts.

高冲击创伤时下颌应力分布中第三磨牙与周围根尖周组织的相互作用:一项有限元研究。
背景:下颌第三磨牙的存在与下颌骨折的风险相关,强调了考虑其与其他下颌结构相互作用的综合研究的必要性。本研究利用有限元分析方法探讨下颌第三磨牙及其邻近组织对下颌结构脆性的影响。材料和方法:根据RIFEM 1.0提出的指导原则,使用先前创建的三个下颌骨模型进行有限元分析研究:模型A,不含左右第三磨牙;B型,没有1 / 3摩尔;C型,双侧有第三磨牙。在虚拟环境中对右下颌骨体施加2452N的力,允许对每个下颌骨进行结构分析。结果:没有第三磨牙和只有一个第三磨牙的模型与有两个第三磨牙的模型相比,能量耗散模式相似。第三磨牙的存在影响了应力的大小和分布,突出了特定区域的脆弱点,如舌面、双侧髁(没有和有一个对侧第三磨牙的模型)和第二磨牙的颈椎远端区域(第三磨牙缺失)。同时也明显地显示了能量流向创伤对侧的路径能量集中在碰撞后几乎所有牙齿的接触点。结论:下颌第三磨牙的存在影响了模拟高冲击创伤时下颌内应力的分布和大小。第三磨牙的模型表现出明显的应力模式,脆性点出现在关键区域,如舌面、髁突和第二磨牙区域。这些发现表明,第三磨牙的存在增加了下颌骨的结构脆弱性,潜在地增加了下颌骨骨折的风险,特别是在创伤性影响的情况下。
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来源期刊
Medicina Oral Patologia Oral Y Cirugia Bucal
Medicina Oral Patologia Oral Y Cirugia Bucal DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
4.60
自引率
0.00%
发文量
52
审稿时长
3-8 weeks
期刊介绍: 1. Oral Medicine and Pathology: Clinicopathological as well as medical or surgical management aspects of diseases affecting oral mucosa, salivary glands, maxillary bones, as well as orofacial neurological disorders, and systemic conditions with an impact on the oral cavity. 2. Oral Surgery: Surgical management aspects of diseases affecting oral mucosa, salivary glands, maxillary bones, teeth, implants, oral surgical procedures. Surgical management of diseases affecting head and neck areas. 3. Medically compromised patients in Dentistry: Articles discussing medical problems in Odontology will also be included, with a special focus on the clinico-odontological management of medically compromised patients, and considerations regarding high-risk or disabled patients. 4. Implantology 5. Periodontology
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