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Research Article

JCDR. 2021; 12(6): 539-550


Comprehensive evaluation of the stress distribution of mandibular implants using regular and platform switching implants: A finite element analysis based original research study

Dr. Aalok Mishra, Dr. Manmeet Gulati, Dr. Ram Rattan Goyal, Dr. Manmohit Singh Kumar, Dr. Parul Goel, Dr. Jasleen Arora.


Abstract

Background and Aim:Finite element modeling is described as the representation of the
geometric model in terms of a finite number of elements and nodes which are building blocks of
the numerical representation of the model. The sole aim of this study was to evaluate the stress
distribution of mandibular implants using regular and platform switching implants. Materials &
Methods:Initially, a three dimensional model simulating posterior edentulous maxillary segment
containing a regular implant and a platform switching concept implant were designed. The finite
element software used in this study was „ANSYS Workbench‟. The titanium implants of
diameter 4.5 mm and length 11.5 mm were designed as a solid cylinder. Group 1 implants were
be placed by regular concept wherein group 2 implants were placed by platform switching
concept. Group 3 implants were placed at 5degree lingual angulations. Eight different FEM
models were formed to study the stress distribution of mandibular implants. Statistical Analysis
and Results: Statistical analysis was completedby statistical software Statistical Package for the
Social Sciences (SPSS). The recorded data was subjected to appropriate statistical tests to obtain
p values, mean, standard deviation, standard error an 95% CI. P ≤ 0.05 was considered as
statistically significant.Total eight FEM models were designed based on the predetermined
criteria for stress analysis. The results were obtained in values i.e. maximum Von Mises stress
for each model. First model showed 21.7 Mpa stress values for cortical bone, 3.4 Mpa for
cancellous bone and 21 Mpa for implants. In eighth model, stress values obtained were 27.9 Mpa
for cortical bone, 4.8 Mpa for cancellous bone and 35 Mpa for implants.Conclusion: Within the
limitations of the study authors concluded that among all studied groups, the maximum stress
distribution among was seen in platform switched implants. It was also applicable to peri-implant
regions. However, regular implants have been shown to distribute lesser stress inside and around
the bone.

Key words: Finite element modeling, ANSYS, Cortical bone, Implants, Von Mises stress






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