Three Dimensional Finite Element Analysis of Stresses Induced Around Inclined Implants with Different Framework Materials in Maxillary Complete Arch Prostheses (All on 4) | ||||
| Egyptian Dental Journal | ||||
| Article 32, Volume 69, Issue 2 - Serial Number 4, April 2023, Page 1517-1527 PDF (2.08 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2023.197760.2470 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Mohamed Hakim  
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| Associate Professor of Removable Prosthodontics, Faculty of Dental Medicine, Beni-Suef University | ||||
| Abstract | ||||
| The aim of the study is to compare stresses induced onto implant-bone interface, implants & denture bases on using cobalt Chromium (Cr-Co) and Titanium (Ti) framework materials. Methodology: Three dimensional finite element models of completely edentulous maxilla rehabilitated with ALL on 4 implant prostheses, (Two vertical anterior implants & two posterior implants 20°,30°, 45° mesially tilted ) , Cr-Co & Ti framework materials were constructed. Bilateral axial load of 100 N was applied onto the palatal cusps of maxillary posterior teeth. The resultant equivalent Von Misses stresses at areas of interest were calculated. Results: The Von Mises stresses induced in bone were 5.132 & 6.144 Mpa in model I & IV / 2.403 & 2.272 Mpa in model II & V /13.937 & 14.591 Mpa in model III & VI respectively . The stresses induced in denture bases were 225.25 & 218.91 Mpa in model I & IV, 156.74 & 170.19 Mpa in model II & V, 227.25 & 159.99 Mpa in model III & VI respectively. The stresses induced in implants were 26.591 & 31.315 Mpa in model I & IV, 18.322 & 26.42 Mpa in model II & V / 117.29 & 117.66 Mpa in model III & VI respectively. Conclusions: Within the limitations of this study, we may conclude: • The more rigid the framework, the less stress dissipation onto the surrounding structures. • Posterior implants tilted mesially may reduce the stresses induced onto implants & surrounding structures. | ||||
| Keywords | ||||
| All on four; Maxilla; FEA; implant tilting; framework | ||||
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