Eskibağlar Mehmet, Erdem Serkan, Kaman Mete Onur
Department of Endodontics, Faculty of Dentisry, Fırat University, Elazığ, Turkey.
Department of Mechanical Engineering, Engineering Faculty, Firat University, Elazığ, Turkey.
Comput Methods Biomech Biomed Engin. 2024 Sep;27(12):1704-1713. doi: 10.1080/10255842.2023.2254882. Epub 2023 Sep 7.
The aim of this study was to evaluate the stress induced by clamps made of different materials on mandibular first molar teeth using finite element analysis. The tooth model to be used in the study was created using micro-CT scanner and the rubber dam clamp model was created in three dimensions (3D) using Solidworks and applied to a finite element tooth model of an intact mandibular first molar. The size of the clamp opening and the force to be applied were calculated according to the buccolingual distances of the tooth. The contact areas of the clamps on the tooth were determined and subjected to force. The stress distribution patterns and maximum von Mises stresses were calculated and compared against these forces. The most stress against these forces occurred in the enamel tissue on the distal side where the clamp was in contact with the tooth. The stress value in the stainless steel clamp (191.63 MPa) was approximately 85% higher than the clamp made of polyethylene ketone (103.85 MPa). The stress in the dentin and pulp tissue of the tooth was negligible. Clinicians should examine the enamel tissue below the equatorial line of the tooth in detail before clamp application. The forces exerted by stainless steel clamps can cause damage to the enamel tissue of the tooth or progression of an existing enamel crack.
本研究的目的是使用有限元分析评估由不同材料制成的夹子对下颌第一磨牙产生的应力。研究中使用的牙齿模型通过微型计算机断层扫描（micro-CT）扫描仪创建，橡胶障夹模型使用Solidworks软件进行三维（3D）创建，并应用于完整下颌第一磨牙的有限元牙齿模型。根据牙齿的颊舌径计算夹子开口的大小和施加的力。确定夹子在牙齿上的接触区域并施加力。计算应力分布模式和最大冯·米塞斯应力，并与这些力进行比较。在夹子与牙齿接触的远中侧釉质组织中，针对这些力产生的应力最大。不锈钢夹子中的应力值（191.63 MPa）比聚醚酮制成的夹子（103.85 MPa）高出约85%。牙齿牙本质和牙髓组织中的应力可忽略不计。临床医生在应用夹子之前应详细检查牙齿赤道线以下的釉质组织。不锈钢夹子施加的力可能会对牙齿的釉质组织造成损伤或使现有的釉质裂纹进展。
