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http://dx.doi.org/10.4047/jkap.2014.52.3.202

Effect of the marginal position of prosthesis on stress distribution of teeth with abfraction lesion using finite element analysis  

Kim, Myeong-Hyeon (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
Lee, Cheong-Hee (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
Publication Information
The Journal of Korean Academy of Prosthodontics / v.52, no.3, 2014 , pp. 202-210 More about this Journal
Abstract
Purpose: The aim of this study was to evaluate the stress concentration and distribution whether restoring the cavity or not while restoring with metal ceramic crown on tooth with abfraction lesion using finite element analysis. Materials and methods: Maxillary first premolar was selected and made a total of 10 finite element model. Model 1 was natural tooth; Model 2 was tooth with metal ceramic crown restoration which margin was positioned above 2 mm from CEJ; Model 3 was tooth with metal ceramic crown restoration which margin was positioned on CEJ; Model 4 was natural tooth which has abfraction lesion; Model 5 and 6 had abfraction lesion and the other condition was same as model 2 and 3, respectively; Model 7 was natural tooth which had abfraction lesion restored with composite resin; Model 8 and 9 was tooth with metal ceramic crown after restoring on abfraction lesion with composite resin; Model 10 was restored tooth on abfraction lesion with composite resin and metal ceramic crown restoration which margin is positioned on lower border of abfraction lesion. Load A and Load B was also designed. Von Mises value was evaluated on each point. Results: Under load A or load B, on tooth with abfraction lesion, stress was concentrated on the apex of lesion. Under load A or load B, on tooth that abfraction lesion was restored with composite resin, the stress value was reduced on the apex. Conclusion: In case of abfraction lesion was restored with composite resin, the stress was concentrated on the apical border of restored cavity regardless of marginal position. It was favorable to place crown margin on the enamel for restoring with metal ceramic crown.
Keywords
Dental stress analysis; Finite element analysis;
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