Comparison of Stresses Around Dental Implants Placed in Normal and Fibula Reconstructed Mandibular Models using Finite Element Analysis

Abstract

Purpose: This study was formulated to evaluate and compare stresses around endosseous implants in various normal and fibula reconstructed mandibular models using finite element analysis method. Materials and Methods:CT scan data of a completely edentulous patient and a fibula reconstructed patient was made and the Dicom images were used to design 3-D mandibular models using software. Based on the information from the scan data, various types of reconstructed FEA models were made. Implants (fixtures) and superstructures were then embedded in each model and Von Mises stress around the neck of each implant under a vertical loading of 200 N and Horizontal load of 50 N was calculated using finite element structural analysis software. The results were compared between the reconstructed mandible and their respective normal mandible. Results:Higher stress values were obtained for all the reconstructed types under horizontal loading and in reconstructed models involving larger area of reconstruction the stress were more. In the models involving smaller area of reconstruction like symphysis alone or body alone there is no significant change in the stress values on vertical loading. Conclusion:Stresses were comparatively smaller in mandibles involving a smaller area of reconstruction. Hence, fixed prosthesis could be advised and a bar retained over denture for reconstruction for larger area of reconstruction.Thiyaneswaran nesappan 1 , padma ariga 2

Rehabilitation of long‐term mandibular defects by whole‐process digital fibula flap combining with implants: A case report

“…(1) Primary insertion may affect the blood supply of the 4) Simultaneous dental implants significantly increase the difficulty of presurgical design and surgery field. 20 Delayed dental implants at 6-12 months after the graft is considered a safer way but significantly prolongs the treatment time. In this case, the patient could avoid postoperative radiotherapy and expect a shorter treatment protocol.…”

“…(3) Dental implants might impair the ability of bone regeneration, prolonging the bone healing process. (4) Simultaneous dental implants significantly increase the difficulty of presurgical design and surgery field 20 . Delayed dental implants at 6–12 months after the graft is considered a safer way but significantly prolongs the treatment time.…”

Evaluation of Fatigue Life for Dental Implants Using FEM Analysis

“…A cancellous bone with a surrounding 2 mm thickness cortical bone were simulated [14,18] based on the CT scan images [19] in Mimics software (Mimics ® , Materialise Corp., Leuven, Belgium), based on which a 3D model was generated in SolidWorks 2008 (Dassault Systems SOLIDWORKS Corp., Waltham, MA, USA) [15]. Based on the ITI standard, a dental implant model was generated with a diameter of 4.1 mm and length of 10 mm.…”

Sonlu Elemanlar Stres Anali̇z Yöntemi̇ Ve Dental İmplantoloji̇ İle İlgi̇li̇ Yapilan Araştirmalar

“…35 açılı yerleştirilen implantlarla ilgili bir SESA çalışması yapmıştır.Sannino 36 All-on-4 implant konsepti ile ilgili bir SESA çalışması gerçekleştirmiştir. Kısa implantlar 37 , dental implant üstü kantilever uzantılar 38 , kişiye özel implant tasarımı 39 , fibula greftine yerleştirilen implantlar 40 , zigoma implantları 41 gibi dental implantolojinin birçok alanıyla ilgili SESA ile yapılmış literatürde yüzlerce çalışma bulunmaktadır ve neredeyse yapılabilecek çalışmalar ancak hayal gücü ile sınırlandırılabilmektedir.…”