Establishment and stress analysis of buccal⁃occlusal⁃lingual inlay finite element model of mandibular first mo⁃ lar

• Main Authors: CHEN Jingping, WU Buling
• Format: Article
• Language: zho
• Published: Editorial Department of Journal of Prevention and Treatment for Stomatological Diseases 2019-04-01
• Series: 口腔疾病防治
• Subjects: Mandibular first molar; Bucco ⁃ occluso ⁃ lingual (BOL) inlay; Three ⁃ dimensional finite element; Stress analysis; Cracked tooth
• Online Access: http://www.kqjbfz.com/EN/10.12016/j.issn.2096-1456.2019.04.007

Objective To observe the stress distribution according to a model of the bucco⁃occluso⁃lingual (BOL) inlay of mandibular first molar after restoration to provide a basis for the clinical treatment of cracked tooth with BOL in⁃ lay. Methods A three⁃dimensional finite element model of mandibular first molar was established by combining micro⁃ CT scanning technology with Mimics, UG, Ansys and Midas⁃FEA software. Based on this model, a BOL inlay restoration model was established. The material parameter of inlay IPS e.max CAD was given, and a Von⁃mises stress distribution nephogram under the same loading condition was obtained. The results of the stress distribution in each model were compared. Results The stress of intact teeth is mainly concentrated in the central fissure of the occlusal surface at the crown. The stress of the cavity after BOL inlay restoration is mainly concentrated in the mesial and distal walls of the cavity, the axial⁃pulpal line angle and the gingival wall. The stress of the inlay is mainly distributed at the bottom of the inlay, axial wall and the gingival wall. Conclusion BOL inlay restoration change the stress distribution in the com⁃ plete dental model, which relieves the stress concentration in the fossa and groove of the occlusal surface and can play an active role in the treatment of cracked tooth.