Valuation of stress patterns in the peri implant bone of non-parallel implants supporting a long-cantilevered prosthesis: a 3D finite element analysis

Journal: International Journal of Clinical and Biomedical Research

Article type: Original Research Articles

Published: 2020-10-29

Volume: 6; Issue: 4; Pages: 18-24

ISSN: 2395-0471

DOI: 10.31878/ijcbr.2020.64.05

Article URL: https://journals.sumathipublications.com/article/article-1784653451967-366828592

PDF: https://journals.sumathipublications.com/article/article-1784653451967-366828592.pdf

JATS XML: https://journals.sumathipublications.com/article/article-1784653451967-366828592.xml

Authors

  1. Mohammed Abusaad Siddiqui
    Reader, Department of Prosthodontics, Sri Balaji Dental College, Hyderabad, Telangana, India
  2. Sudheer N
    Professor, Department of prosthodontics, Kamineni Institute of Dental Sciences, Narketpally, Telangana, India
  3. Dulala Vikram Raj
    Professor and HOD, Department of Prosthodontics, Sri Balaji Dental College, Hyderabad, Telangana, India
  4. Aditi Chintamani Sabnis
    Reader, Department of Prosthodontics, Sri Balaji Dental College, Hyderabad, Telangana, India
  5. Alluru Amrutesh
    Senior Lecturer, Department of Prosthodontics, Sri Balaji Dental College, Hyderabad, Telangana, India
  6. Anurag Lahoti
    Senior Lecturer, Department of Prosthodontics, Sri Balaji Dental College, Hyderabad, Telangana, India

Abstract

The treatment modality for completely edentulous arches has shifted from complete dentures to dental implants during the last 15-20 years. Tilting of implants has reduced the concern of resorbed posterior ridges in completely edentulous patients with “All-on-four” and “All-on-six” concept of dental implants. The purpose of this study is to compare the biomechanical behaviour of the “All-on-four”, “All-on-six” models with tilted distal implants at different angulations of 30 and 45 ° with four parallel placed implant-supported fixed prosthesis, and six parallel placed implant-supported fixed prosthesis models as controls using three-dimensional finite element analysis. The results showed that in all the models, in cancellous bone, cortical bone, implant and prosthesis – “All-on-four” model with distal implants tilted at an angulation of 30° showed stress values less than or equivalent to all the other models except on the implant in the presence of cantilever and on prosthesis during full mouth biting load where maximum stresses were observed. The study shows that All-on-four concept with tilted distal implants at an angulation of 30° showed stress values favourable for the rehabilitation of completely edentulous maxilla, but the presence of cantilever remains an area of concern.

Keywords

Peri Implant Bone, Non Parallel Imnplants, Cantilevered Prothesis, Stress Patterns

Full Text

HTML full text is not available. Refer to the PDF galley.