Investigation of stress distribution in roots restored with different crown materials and luting agents.
The purpose of this study was to identify crown materials and luting agents that would decrease the stress concentrated at the roots of endodontically treated teeth. To this end, natural tooth model (NT), full cast crown model (gold-silver-palladium alloy; MC), polymer-based restorative material crown model (HCC), and all-ceramic crown model (ACC) were constructed. In each model, methyl methacrylate-based resin cement (MMA) and composite cement (CC) were used as luting agents. The magnitudes of von Mises stress of the roots during function were compared. When the luting agent was changed from MMA to CC, von Mises stress in the cervical area decreased by 37.8% for MC, 27.1% for HCC, and 37.0% for ACC. Within the limitations of this study, the combination of HCC and CC gave rise to the lowest stress concentration at the cervical area.
Fixed Prosthodontics, Department of Restorative Science, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. c.suzuki.fpro@tmd.ac.jp
Chikako
C
Suzuki
Hiroyuki
H
Miura
Daizo
D
Okada
Wataru
W
Komada
D000328:Adult; D001732:Bite Force; D003188:Composite Resins; D003442:Crowns; D003722:Dental Alloys; D003776:Dental Porcelain; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis / Q000379:methods*; D004548:Elasticity; D020342:Finite Element Analysis; D006801:Humans; D008297:Male; D011176:Post and Core Technique; D019279:Resin Cements; D014082:Tooth Fractures / Q000517:prevention & control; D014092:Tooth Root / Q000502:physiology*
C120982:Ag-Pd-Cu-Au alloy; D003188:Composite Resins; D003722:Dental Alloys; D019279:Resin Cements; D003776:Dental Porcelain