Aim: To evaluate and compare the stress distribution in periimplant area and posterior region of completely edentulous mandible rehabilitated using implant-retained overdenture (IOD) with two types of ball attachment configuration, i.e., rigid and resilient.Materials and methods: Two mathematical models were prepared simulating completely edentulous mandibular ridge. Model 1 represented implant with rigid stud attachment. Model 2 represented implant with resilient stud attachment. Both the models were subjected to the compressive force of 35 N. The stresses in the peri-implant area and posterior region of the mandible were evaluated and compared for both the models. Results:The IOD with rigid stud configuration showed 12.1% higher peri-implant stresses than resilient configuration, whereas the resultant stress values in posterior edentulous region were 1.5% lower with resilient configuration. Conclusion:Highest stress value was seen in the crestal part of bone around the implant with both rigid and resilient attachment configuration. Implant-retained overdentures with resilient stud attachment showed better dissipation of forces when compared with rigid attachment.Clinical significance: Correct choice of attachment configuration can influence the peri-implant stresses in IOD, which in turn reduces the complications that can be a result of excessive stresses around the implant.
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