[Effect of stud attachment post design on dentin stress distribution].
The shape design of attachment post is crucial factors influencing post retention and stress distribution to the dentin. By means of CAD and FEA, the present study investigated the effects of the shape designs of attachment posts on the stress distribution in dentin. The results indicated that the taper post had wedging effects on the dentin and produced higher Von Misses stress than that of parallel side post and the Von Misses stress value of the dentin was about 1.1 times. The maximum Von Misses stress value that the design of the thread post produced was about 1.06 times the stress of the nonthread post did. However, the effects of post design on the dentin were minor compared with the bite force directions. In the same post design, the maximum Von Misses stress in dentin with 45 degree oblique force was about 2.1 times with vertical force. Therefore, reducing oblique force is the main method to prevent root fracture in clinic.
Jia
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A
Department of Prosthodontics, College of Stomatology, Fourth Military Medical University, China.
Luo
X
X
Ou
Y
Y
D017076:Computer-Aided Design; D003481:Cuspid; D003804:Dentin / Q000502:physiology*; D003779:Denture Design; D003834:Denture Precision Attachment; D003781:Denture Retention; D006801:Humans; D013314:Stress, Mechanical