Three-dimensional finite element analysis of stress and strain distributions in post-and-core treated maxillary central incisors.
OBJECTIVE
To estimate which combination of restorative materials resulted in the most homogeneous stress and strain distributions in post-and-core treated teeth.


METHODS
Eight experimental finite element models with different material configurations were simulated; both indirect and direct restorations were considered. An arbitrary load of 50 N was applied on the palatal surface of the crown at a 60-degree angle to the tooth's longitudinal axis to simulate tearing function.


RESULTS
In all the models, the values of both strain and stress recorded in the middle third of the buccal aspect of the root surface were off the scale. In contrast, the minimum values were noticed at the level of both the apical portion of the post and the root apex.


CONCLUSIONS
The mechanical properties of the crown and core materials influenced both the position of concentration areas and the level of stress and strain along the dentin/cement/post interfaces.
Sorrentino
Roberto
R
Department of Dental Materials and Restorative Dentistry, University of Siena, Policlinico Le Scotte, Siena, Italy.
Salameh
Ziad
Z
Apicella
Davide
D
Auriemma
Tommaso
T
Zarone
Fernando
F
Apicella
Antonio
A
Ferrari
Marco
M
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D017267:Dental Prosthesis Design; D003786:Dental Pulp Cavity / Q000502:physiology; D003804:Dentin / Q000502:physiology; D020342:Finite Element Analysis / Q000145:classification; D005898:Glass / Q000737:chemistry; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007180:Incisor / Q000502:physiology*; D008422:Materials Testing; D008437:Maxilla; D008954:Models, Biological; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry; D013232:Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D019227:Tooth Apex / Q000502:physiology; D014092:Tooth Root / Q000502:physiology; D015040:Zirconium / Q000737:chemistry
D003188:Composite Resins; D003764:Dental Materials; C467913:Filtek Flow; C444701:Filtek Z250; D011109:Polymethacrylic Acids; C483701:Rely X Unicem; C462240:RelyX ARC; D019279:Resin Cements; C009753:fiberglass; D013232:Steel; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D015040:Zirconium; C028541:zirconium oxide