Research Article
Volume 19 Issue 6 - 2020
Finite Element Study on Posterior Three-Unit Fixed Dental Prosthesis Made from Different Materials
Salah A Yousief1,2*, Jumanah Ateeq A Alsubhi3, Wurayf Hassan A Tulbah3, Maram Turky Abbas3, Nusaybah Abbas Yamani3, Haila Majed aljuhani3, Suha saud alshammari3, Manar Ghazi Almohnna3, Njoud fahad almeniei3, Ebtisam, Alghamdi3, Ibrahim Alqurashi3, Madawi Badr Alshalhoub3, Yousef Jayar3, Rami M Galal4,5 and Mohamed I El-Anwar6
1Restorative Dentistry Department, AL-Farabi Dental College, Jeddah, Saudi Arabia
2Crown and Bridge Department, Faculty of Oral and Dental Medicine, Al Azhar University, Assuit Branch, Egypt
3Restorative Dentistry Department, King Khallid University, Abha, Saudi Arabia
4Fixed and Removable Prosthodontics Department, National Research Centre, Egypt
5Fixed Prosthodontics Department, Al Nahda University (NUB), Egypt
6Mechanical Engineering Department, National Research Centre (NRC), Egypt
*Corresponding Author: Salah A Yousief, Crown and Bridge Department, Faculty of Oral and Dental Medicine, Al Azhar University, Assuit Branch, Egypt.
Received: April 04, 2020; Published: May 14, 2020


Objective: Numerically investigating different restorative materials effect on fixed dental prostheses stresses and deformation distributions on bone, cement, and prosthesis body.

Materials and Methods: Four different restorative materials; Porcelain Fused to Metal (PFM), Emax, Feldspathic porcelain and Poly-Ether-Ketone-Ketone (PEKK) were tested. A 3D finite element model was created by scanning plaster Model Bridge with missing maxillary first premolar. Mandibular bone augmented by two prepared abutments representing maxillary canine and second premolar. Compressive vertical load of 200N was applied at the central fossa of the pontic, while model base was fixed in place as boundary condition.

Results: Four linear static analyses were performed. Regardless the prosthesis material, maximum Von Mises stress was located on the abutment finishline towards the pontic. On the other hand maximum total deformation was found on abutment top towards the pontic.

Conclusion: Carful preparation of the finishline contact with fixed partial denture is a must to avoid stress concentration. Bone deformation and stresses were within physiological limits, while increasing fixed prosthesis material has slightly decreased bone stresses. Pure PEKK as fixed prosthesis material is not recommended due its high flexibility and deformation.

Keywords: Finite Element Analysis; Fixed Dental Prosthesis; Porcelain Fused to Metal; Emax; Feldspathic Porcelain; PEKK


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Citation: Salah A Yousief., et al. “Finite Element Study on Posterior Three-Unit Fixed Dental Prosthesis Made from Different Materials”. EC Dental Science 19.6 (2020): 37-43.

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