3D finite element analysis assessment of maxillary premolar restored with various restorative materials

Nasser Mohey Shehab; Abdullah Ahmed Abdelhady; Khaled Mohammad Noaman; Hossam El Mandouh Tawfeek

doi:10.53730/ijhs.v6nS9.12349

Authors

Nasser Mohey Shehab
drn.shehab.86@gmail.com
Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt.
Abdullah Ahmed Abdelhady Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt.
Khaled Mohammad Noaman Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt.
Hossam El Mandouh Tawfeek Conservative Dentistry Department, Faculty of Dentistry, Suez Canal University, Egypt.

Keywords:

Finite element analysis, Maxillary premolar, Non-carious cervical lesions, Restorative materials, Stress distribution

Abstract

Objectives: The study used three-dimensional finite element analysis to evaluate the effects of total deformation and Von Mises stresses (VMS) of different shaped non-carious cervical lesions (NCCLs) and occluso-gingival dimensions (OGD) of maxillary premolars when restored with different restorative materials. Methods: Maxillary premolar was scanned utilizing 3D-laser scanning to produce a 3D digital geometrical model. Six cavities were created with three different shapes (notch, saucer, and mixed), and two OGD (1.5mm and 3mm). Two 100N oblique forces were applied at 11^o and 45^o from the vertical axis. The total deformation data obtained were expressed in mm, and the VMS values were recorded. Results: Various tested dimensions and shapes of NCCLs produce equivalent values of maximum total deformation on restorations. Increasing oblique angle from 11º to 45º increased the total deformation about three times. Increasing oblique angle increase VMS by about 30%. One Bulk Fill restorative came in second with the lowest VMS. Ketacä N100 restoration had the longest lifetime. Conclusion: Various OGD shapes of NCCLs did not affect the restoration deformation or the values of VMS, whereas the loading angle and the type of restorative materials influenced the stress distribution in the cavity models of the maxillary premolars.

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