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http://dx.doi.org/10.5395/JKACD.2008.33.6.570

STRESS ANALYSIS OF MAXILLARY PREMOLARS WITH COMPOSITE RESIN RESTORATION OF NOTCH-SHAPED CLASSⅤCAVITY AND ACCESS CAVITY ; THREE-DIMENSIONAL FINITE ELEMENT STUDY  

Lee, Seon-Hwa (Department of Conservative dentistry, School of Dentistry, Pusan National University)
Kim, Hyeon-Cheol (Department of Conservative dentistry, School of Dentistry, Pusan National University)
Hur, Bock (Department of Conservative dentistry, School of Dentistry, Pusan National University)
Kim, Kwang-Hoon (Department of Mechanical design engineering, College of Engineering, Pusan National University)
Son, Kwon (Department of Mechanical design engineering, College of Engineering, Pusan National University)
Park, Jeong-Kil (Department of Conservative dentistry, School of Dentistry, Pusan National University)
Publication Information
Restorative Dentistry and Endodontics / v.33, no.6, 2008 , pp. 570-579 More about this Journal
Abstract
The purpose of this study was to investigate the distribution of tensile stress of canal obturated maxillary second premolar with access cavity and notch-shaped class V cavity restored with composite resin using a 3D finite element analysis. The tested groups were classified as 8 situations by only access cavity or access cavity with notch-shaped class V cavity (S or N), loading condition (L1 or L2), and with or without glass ionomer cement base (R1 or R2). A static load of 500 N was applied at buccal and palatal cusps. Notch-shaped cavity and access cavity were filled microhybrid composite resin (Z100) with or without GIC base (Fuji II LC). The tensile stresses presented in the buccal cervical area, palatal cervical area and occlusal surface were analyzed using ANSYS. Tensile stress distributions were similar regardless of base. When the load was applied on the buccal cusp, excessive high tensile stress was concentrated around the loading point and along the central groove of occlusal surface. The tensile stress values of the tooth with class Ⅴ cavity were slightly higher than that of the tooth without class V cavity. When the load was applied the palatal cusp, excessive high tensile stress was concentrated around the loading point and along the central groove of occlusal surface. The tensile stress values of the tooth without class V cavity were slightly higher than that of the tooth with class V cavity.
Keywords
Tensile stress; Finite element analysis; Class V cavity; Access cavity; Base;
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Times Cited By KSCI : 2  (Citation Analysis)
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