Comparative stress analysis of delayed and immediate loading of a single implant in an edentulous maxilla model
Identifieur interne : 000948 ( Main/Exploration ); précédent : 000947; suivant : 000949Comparative stress analysis of delayed and immediate loading of a single implant in an edentulous maxilla model
Auteurs : Jie Gao ; Yasuyuki Matsushita ; Daisuke Esaki ; Tatsuya Matsuzaki ; Kiyoshi KoyanoSource :
- Journal of Dental Biomechanics [ 1758-7360 ] ; 2014.
Abstract
Stress distribution in peri-implant bone in an edentulous maxilla following delayed and immediate loading implant and the effect of implant length on the maximum stress were evaluated by using two kinds of finite element analyses. A threaded implant was loaded with a 100 N vertical force, either immediately or delayed, and examined by finite element analysis with a simple contact relation or a bonding interaction between the implant and the bone, respectively. Higher stresses were observed in cortical bone around the implant neck following delayed loading and in the trabecular bone around the implant threading in the immediate loading model. The maximum stress in the immediate loading model was dramatically higher than in delayed loading. Increased implant length caused decrease in bone stresses in both loading models. Though the stress level was higher, the decrease in the maximum trabecular bone stress in immediate loading was profound.
Url:
DOI: 10.1177/1758736014533982
PubMed: 25342982
PubMed Central: 4206692
Affiliations:
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<front><div type="abstract" xml:lang="en"><p>Stress distribution in peri-implant bone in an edentulous maxilla following delayed and immediate loading implant and the effect of implant length on the maximum stress were evaluated by using two kinds of finite element analyses. A threaded implant was loaded with a 100 N vertical force, either immediately or delayed, and examined by finite element analysis with a simple contact relation or a bonding interaction between the implant and the bone, respectively. Higher stresses were observed in cortical bone around the implant neck following delayed loading and in the trabecular bone around the implant threading in the immediate loading model. The maximum stress in the immediate loading model was dramatically higher than in delayed loading. Increased implant length caused decrease in bone stresses in both loading models. Though the stress level was higher, the decrease in the maximum trabecular bone stress in immediate loading was profound.</p>
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