Abstrait

Choosing Among Different Dimensions in A Newly Designed Dental Implant, 3 Dimensional FEA Comparative Study

Faaiz Alhamdani

Introduction: There are many dental implant designs, which have been adopted by hundreds of dental implant companies. These designs are modeled following certain micro and macro design criteria. One of these criteria is the dental implant thread design. The aim of introducing a new dental implant with a modified reverse buttress design has been suggested. The objective of the current study to choose the suitable implant material and dimensions among the tested range of implant designs under study using 3D Finite Element Study.

Materials and Methods: A modified Reverse Buttress dental implant in two models (TiG4 and TiG5 models, a range of different implant dimensions (3/13, 3.5/11, 4.11, 4/9, 4.5/9, 4.5/7, 5/9, 5/7, 5.5/9, 5.5/7 mm) were analysed for stress distribution over the surrounding cortical and cancellous bones. A three-dimensional Finite Element Analysis has been carried out in both normal (70 N vertical load) and overload (500 N, 25°) conditions.

Results: In all implant dimensions, maximum Von Mises stress was less than average cortical and cancellous bone elastic modulus. Mann Whitney U Test did not show a statistically significant difference between maximum Von Mises stress in both implant models over both cortical and cancellous bones in normal and over-occlusal loads (p>0.05).

Conclusion: All implant dimensions, showed far fewer stress levels over both cortical and cancellous bones. However, it would be advisable to eliminate the 3/13 mm implant dimension, especially, if the TiG5 model is to be considered, and 5.5/7 mm implant dimension if TiG4 model is to be considered.