Comparative study between conventional and mini dental implants of different diameters supportin g mandibular overdentures. A finite element stress analysis study

Document Type : Original Article

Authors

Lecturer Prosthodontist, Faculty of Oral and Dental Medicine, Cairo University.

Abstract

This study was conducted to provide an understanding of the biomechanical behavior of
different diameters MDIs and compare it with conventional diameter implants when supporting
an overdenture . Three different models were designed .The first model has two standard diameter
implants (3.8x12mm) (D1), the second (D2) has 2 mini-dental implants (2.4x12mm) and the third
model (D3) has 2 of ultra-small diameter (1.8 x 12mm) all implants were placed at canines region.
3D finite elements stress analysis was performed to evaluate biomechanical situation in both the
implants and the peri-implant bone under vertical and oblique loading of the overdentures. It can be
concluded that the stress values affecting the peri-implant bone and the implants are reciprocal to
dental implant diameter and the use of MDIs as overdenture abutments should be limited to cases
with limited bone quantity.

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