title: Three-dimensional finite element analysis of stress distribution in composite resin cores with fiber posts of varying diameters.
abstract: Using three-dimensional finite element analysis (3D-FEA), stress distributions in the remaining radicular tooth structure were investigated under the condition of varying diameters of fiber post for fiber post-reinforced composite resin cores (fiber post and core) in maxillary central incisors. Four 3D-FEA models were constructed: (1) fiber post (ø1.2, ø1.4, and ø1.6 mm) and composite resin core; and (2) gold-cast post and core. Maximum stresses in the tooth structure for fiber post and core were higher than that for gold-cast post and core. In the former models, stresses in the tooth structure as well as in the composite resin were slightly reduced with increase in fiber post diameter. These results thus suggested that to reduce stress in the remaining radicular tooth with a large coronal defect, it is recommended to accompany a composite resin core with a fiber post of a large diameter.
authors.affiliation: Division of Prosthodontics, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan. okamoto@dent.meikai.ac.jp
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Okamoto
authors.forename: Teruno
authors.initials: T
authors.lastname: Ino
authors.forename: Naoki
authors.initials: N
authors.lastname: Iwase
authors.forename: Eitaroh
authors.initials: E
authors.lastname: Shimizu
authors.forename: Megumi
authors.initials: M
authors.lastname: Suzuki
authors.forename: Goh
authors.initials: G
authors.lastname: Satoh
authors.forename: Shuji
authors.initials: S
authors.lastname: Ohkawa
authors.forename: Masanori
authors.initials: M
authors.lastname: Fujisawa
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003804:Dentin / Q000502:physiology; D020342:Finite Element Analysis; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007180:Incisor / Q000502:physiology; D016876:Metal Ceramic Alloys / Q000737:chemistry; D008954:Models, Biological; D011176:Post and Core Technique / Q000295:instrumentation; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D014092:Tooth Root / Q000502:physiology
chemical_list: D003188:Composite Resins; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D019279:Resin Cements; D003776:Dental Porcelain