Influence Of Different Implant Abutment Connection On Fatigue Life Of Bone In Edentulous Hemimandibulectomy Cases Restored By Implant Supported Overdenture. A Finite Element Analysis

Document Type : Original Article

Authors

1 Teaching Assistant Prosthetic Dentistry Department, Faculty of Dentistry, Minia University, Egypt

2 Associate Professor and Head of Prosthetic Dentistry Department, Faculty of Dentistry, Minia University, Egypt

3 Professor, Prosthetic Dentistry Department, Faculty of Dentistry, Minia University, and Dean , faculty of Dentistry Delta University , Egypt

Abstract

the purpose of the study is to compare the effect of different type of implant abutment connection system (external hexagonal, internal hexagonal and internal conical) of used implants under the overdenture in fatigue life of remaining bone of hemimandible.
Materials & methods: A three-dimensional finite element study model was constructed and duplicated three times. The model was composed of hemimandible screwed with reconstructive plate and restored by overdenture. The overdenture was retained by three implants of the same type of (IACS) at three positions. The only difference between the three models was the type of IACS used. Model (A) had implants of external hexagonal connection system, Model (B) had implants of internal hexagonal connection and model (C) had internal conical connection
Results: bone of internal hexagonal connection model showed largest number of fatigue life cycles, whereas external hexagonal connection showed smallest one and the values of internal conical connection model was intermediate
Conclusion: under the limitations of the current study, it may be concluded that using internal hexagonal IACS in implant supported mandibular overdenture rehabilitating hemimandible may be the most suitable type

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Egyptian Dental Journal
Volume 68, Issue 4 - Serial Number 4
October (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)
October 2022
Pages 3659-3669

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