TY - JOUR
T1 - The influence of elastic moduli of core materials on shear stress distributions at the adhesive interface in resin built-up teeth
AU - Chiba, Ayaka
AU - Hatayama, Takashi
AU - Kainose, Kimisuke
AU - Nakajima, Masatoshi
AU - Pashley, David H.
AU - Wakabayashi, Noriyuki
AU - Tagami, Junji
N1 - Publisher Copyright:
© 2017, Japanese Society for Dental Materials and Devices. All rights reserved.
PY - 2017
Y1 - 2017
N2 - This study aimed to investigate shear stress distributions in resin built-up teeth using resin composites of varying elastic moduli (E), with or without fiber posts. Three-dimensional mathematical models of a root-filled mandibular premolar tooth were constructed. Resin post and cores were built-up with resin composites of three different E: 12,000, 18,000 and 24,000 MPa, with or without fiber posts. Finite element linear analysis was performed to calculate shear stress distributions at bonding interface between resin core and dentin. Regardless of fiber post insertion, the shear stress on the cervical surface of resin core decreased as the E of resin composites increased. Insertion of fiber posts increased the shear stress on the post surface of resin core, with increases in the E of resin composites. In conclusion, using resin core materials with higher E decreased the shear stress at cervical interface between resin core and dentin regardless of fiber post insertion.
AB - This study aimed to investigate shear stress distributions in resin built-up teeth using resin composites of varying elastic moduli (E), with or without fiber posts. Three-dimensional mathematical models of a root-filled mandibular premolar tooth were constructed. Resin post and cores were built-up with resin composites of three different E: 12,000, 18,000 and 24,000 MPa, with or without fiber posts. Finite element linear analysis was performed to calculate shear stress distributions at bonding interface between resin core and dentin. Regardless of fiber post insertion, the shear stress on the cervical surface of resin core decreased as the E of resin composites increased. Insertion of fiber posts increased the shear stress on the post surface of resin core, with increases in the E of resin composites. In conclusion, using resin core materials with higher E decreased the shear stress at cervical interface between resin core and dentin regardless of fiber post insertion.
KW - Debonding
KW - Elastic modulus
KW - Fiber post
KW - Finite element analysis
KW - Resin composite
UR - http://www.scopus.com/inward/record.url?scp=85011698039&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85011698039&partnerID=8YFLogxK
U2 - 10.4012/dmj.2016-160
DO - 10.4012/dmj.2016-160
M3 - Article
C2 - 28090032
AN - SCOPUS:85011698039
SN - 0287-4547
VL - 36
SP - 95
EP - 102
JO - Dental Materials Journal
JF - Dental Materials Journal
IS - 1
M1 - dmj/2016-160
ER -