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KMID : 0362420080460020193
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Journal of Korean Academy of Prosthodontics
2008 Volume.46 No. 2 p.193 ~ p.200
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FINITE ELEMENT STRESS ANALYSIS OF MAXILLARY TWO IMPLANTS-RETAINED OVERDENTURE ACCORDING TO POSITION OF IMPLANT FIXTURES
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Ha Heon-Seok
Kim Chang-Whe
Lim Young-Jun
Kim Myung-Joo
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Abstract
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Statement of problem: There have been a few studies about unsplinted implant retainted maxillary overdenture.
Purpose: The purpose of this study was to examine the effect of different position of implant for 2 implants-retained maxillary overdenture.
Materials and methods: Three-dimensional finite element models were used to reproduce an edentulous human maxilla with an implant-retained overdenture. Two implants in the canine tooth positions on both side and in the second premolar tooth positions on both side models were examined. Axial loads of 100 N were applied to the occlusal surface at the right first molar tooth positions. Maximum stress at the implant-bone interface and stress at the cortical bone surface just under the loading point were observed.
Results and conclusion: Within the limits of this study, maximum stresses were concentrated around implant of canine position at loading side. The second premolar area was thought to be more favorable to distribution of stress on mucosa, alveolar bone and implants than canine area for maxillary overdenture.
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KEYWORD
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Maxillary unsplinted implant overdenture, Three-dimensional finite element analysis, Stress distribution
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