口腔医学研究

口腔医学研究 ›› 2025, Vol. 41 ›› Issue (6): 496-502.DOI: 10.13701/j.cnki.kqyxyj.2025.06.008

• 儿童口腔医学研究 • 上一篇    下一篇

对替牙期外伤上颌中切牙行复合树脂修复后的有限元分析

邵天洋1,2, 于淼1,2, 纪妍1, 李昕华1, 赵玥1*   

  1. 1.佳木斯大学口腔医学院,佳木斯大学附属口腔医院儿童牙病二科 黑龙江 佳木斯 154002;
    2.黑龙江省口腔生物医学材料及临床应用重点实验室,佳木斯大学口腔医学工程实验中心 黑龙江 佳木斯 154000
  • 收稿日期:2024-11-14 发布日期:2025-06-25
  • 通讯作者: *赵玥,E-mail:Zhaoyue258@sina.com
  • 作者简介:邵天洋(1994~ ),女,黑龙江佳木斯人,主治医师,学士,研究方向:儿童口腔疾病的诊断与序列治疗。
  • 基金资助:
    黑龙江省教育厅基本科研业务基础研究项目(编号:2020-KYYWF-0297)

Finite Element Analysis of Composite Resin Restoration in Injured Maxillary Central Incisors

SHAO Tianyang1,2, YU Miao1,2, JI Yan1, LI Xinhua1, ZHAO Yue1*   

  1. 1. Department of Pediatric Dentistry Ⅱ, Affiliated Stomatological Hospital, School of Stomatology, Jiamusi University, Jiamusi 154002, China;
    2. Key Laboratory of Stomatological Biomedical Materials and Clinical Application of Heilongjiang Province, Jiamusi University Stomatological Engineering Experimental Center, Jiamusi 154000, China
  • Received:2024-11-14 Published:2025-06-25

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摘要： 目的: 探讨在不同咬合方式下,利用复合树脂材料对替牙期上颌中切牙外伤行修复术后的受力分析。方法: 选择形态、尺寸正常的年轻恒牙中的上颌中切牙,通过逆向工程技术建立上颌中切牙的三维有限元模型,对其牙冠进行切割设计。根据不同咬合方式分为3组工况,工况一:与牙体长轴呈0°;工况二:与牙体长轴呈45°;工况三:与牙体长轴呈60°。根据冠折类型不同,每组工况包含5组,即A组:正常牙冠;B组:牙冠横折2 mm;C组:牙冠横折4 mm;D组:牙冠斜折2 mm;E组:牙冠斜折4 mm。运用三维有限元法,分析在不同咬合方式下不同冠折类型的中切牙进行树脂修复后牙体组织的最大应力值、最大应变值。结果: 外伤牙齿加载0°的力时,横折4 mm组应力峰值最大为39.755 MPa,横折2 mm组应变峰值最大为0.0013441 mm。外伤牙齿加载45°的力时,斜折2 mm组应力应变峰值均最大,应力峰值为426.10 MPa,应变峰值为0.0099519 mm。外伤牙齿加载60°的力时,斜折2 mm组应力应变峰值均最大,应力峰值为531.88 MPa,应变峰值为0.0124230 mm。结论: 有限元分析结果表明,年轻恒牙上前牙外伤冠折行复合树脂修复后,当外伤牙齿受0°的咬合力时,横折组脱落率最高;外伤牙齿受45°和60°的咬合力时,斜折2 mm组脱落率最高。

关键词: 年轻恒牙, 前牙外伤, 冠折, 树脂修复, 有限元, 应力分析

Abstract: Objective: To analyze the force distribution in the repair of maxillary central incisor trauma during the replacement stage using composite resin materials under different occlusal modes. Methods: The maxillary central incisors in the young permanent teeth with normal shape and size were selected, and three-dimensional finite element model of the maxillary central incisors was established by reverse engineering technology with the crown was cut and designed. According to different occlusal methods, it is divided into three groups of working conditions, working condition one: 0-degree to the long axis of the tooth; working condition 2: 45-degree to the long axis of the tooth; working condition 3: 60-degree to the long axis of the tooth. According to the different types of crown folds, each group contained 5 groups, i.e. group A: normal crowns; Group B: crown folded 2 mm; Group C: crown transverse fold 4 mm; Group D: crown obliquely folded 2 mm; Group E: crown obliquely folded 4 mm. Using the three-dimensional finite element method, the maximum stress and strain values of the tooth tissue after resin restoration of the central incisor with different crown and fold types were calculated under different occlusal modes. Results: When the traumatic tooth was loaded with a force at 0-degree, the maximum stress peak value of the transverse 4 mm group was 39.755 MPa, and the maximum strain peak value of the transverse 2 mm group was 0.0013441 mm. When the injured tooth was loaded with a force at 45-degree, the stress-strain peak value of the oblique fold 2 mm group was the largest with the stress peak at 426.10 MPa and the strain peak at 0.0099519 mm. When the wounded tooth was loaded with a force at 60-degree, the stress-strain peak value of the oblique fold 2 mm group was the largest with the stress peak value at 531.88 MPa and the strain peak value at 0.0124230 mm. Conclusion: The transverse fracture group had the highest loss rate when the traumatic teeth were subjected to a 0-degree occlusal force after composite resin restoration of the traumatic crown of the upper anterior teeth of young permanent teeth. When the injured tooth was subjected to a bite force of 45-degree and 60-degree, the loss rate was the highest in the oblique 2 mm group.

Key words: young permanent teeth, anterior tooth trauma, crown fracture, resin restoration, finite element, stress analysis