Influence of Attachment Configuration on Stresses in Completely Edentulous Mandibular Ridge with an Implant-retained Overdenture: A Finite Element Analysis

JOURNAL TITLE: World Journal of Dentistry

Author
1. Srivatsa Gopalakrishna
2. Ipsha Singh
3. Usha Bollineni
4. Rohit Shetty
ISSN
0976-6006
DOI
10.5005/jp-journals-10015-1535
Volume
9
Issue
3
Publishing Year
2018
Pages
7
Author Affiliations
    1. Narayana Nethralaya, Bengaluru, Karnataka, India
    2. Narayana Nethralaya, Bangalore
    3. Narayana Nethralaya, Bangalore, India
    4. Sankara Nethralaya, Bengaluru, Karnataka, India
    5. Narayana Nethralaya Eye Hospital, Bangalore, Karanatak, India
    6. Narayan Nethralaya, Bengaluru, Karnataka, India
    1. Department of Prosthodontics and Implantology, KLE Society's Institute of Dental Sciences, Bengaluru, Karnataka India
    1. Department of Prosthodontics, KLE Society\'s Institute of Dental Sciences, Bengaluru, Karnataka, India
    1. Department of Prosthodontics, KLE Society\'s Institute of Dental Sciences, Bengaluru, Karnataka, India
  • Article keywords
    Ball attachment, Implant-retained overdenture, Nylon cap, Peri-implant stresses, Resilient attachment, Singlepiece implant

    Abstract

    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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