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- W2353282305 abstract "Objective To investigate the stress in the periodontal tissues using three-dimansional finite element method when tip back bend arch was used.MethodsThe test was designed into two conditions.Cndition 1:the premolars had brackets and the tip back bend wire was in the slots.Conditon 2:the premolars had no brackets.Three-dimensional finite element models of the lower left central incisor and first molar were set up by means of CT.Stress distribution in root,PDL and alveolar bone,and the tendency of the tooth movement were obtained by calculation under terminal tip back bend arch.ResultsThe molar model revealed that the tensile stress concentration was at the mesial root cervix and rhe compressive stress at the distal root cervix.The incisor model showed that the tensile stress was concentrated at the lingual cervix and the compressive stress was concentrated at the apical tip.The molar had the tendency of lingual movement and distal tipping movement.The incisor had the tendency of intrusion and lingual tipping movement.ConclusionUnder condition 1,tip back bend arch can prevent the inclination of the anchorage molar or anchorage molar lost.Under condition 2,tip back bend arch can lower the incisor effectively." @default.
- W2353282305 created "2016-06-24" @default.
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- W2353282305 date "2008-01-01" @default.
- W2353282305 modified "2023-09-28" @default.
- W2353282305 title "The three-dimensional finite element stress analysis in the periodontal tissue of the left mandibular incisor and the first molar with tip back bendarch" @default.
- W2353282305 hasPublicationYear "2008" @default.
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