Journal of Dental Implants
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Year : 2011  |  Volume : 1  |  Issue : 2  |  Page : 80-85

Effect of two different abutment types on stress distribution in the bone around an implant under two loading conditions

Department of Prosthodontics and Implantology, Meenakshi Ammal Dental College and Hospital, Chennai, India

Correspondence Address:
Siddharth Shelat
405/406 Shivalaya Towers, 90 Feet Road, Thakur Complex, Kandivali (East), Mumbai - 400 101, Maharasthra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0974-6781.91284

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Aim: To investigate the effect of two different abutment types on stress distribution in the bone around an implant under two loading conditions, vertical load and combined load (vertical + angle of 45°). Materials and Methods: Implant of 4.2 × 12 mm 2 was used. Two 2-piece implant systems, Internal Hex and External Hex implant-abutment complex were used. The implant-abutment complex was embedded in bone and subjected to static load of 100 N vertically and a combined load (vertical + 45° angulation). Finite Element modeling of bone implant and abutment was done using Ansys Classical 10.0 software. Results: In external hex system Von Mises stress was 0.784 MPa and 3.502 MPa for spongious bone and 8.60 MPa and 45.126 MPa for compact bone under vertical and combined loading conditions respectively. Internal hex implant system showed values of 0.922 MPa and 2.22 MPa for spongious bone and 6.798 MPa and 26.29 MPa for compact bone for vertical and combined loading conditions. Conclusion: Internal Hex Implant system generated the lowest maximum Von Mises stress for all loading conditions. The maximum Von Mises stress occurred in the region of the compact bone under all loading conditions irrespective of the type of abutment use. Significant reduction in Von Mises stress was observed at the boundary between compact and spongious bone because of relatively low elastic modulus of spongious bone.

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