|
KMID : 1004520130290030209
|
|
Journal of Dental Rehabilitation and Applied Science
2013 Volume.29 No. 3 p.209 ~ p.223
|
|
|
Stress Analysis and Fatigue Failure of Prefabricated and Customized Abutments of Dental Implants
|
|
Kim Hee-Eun
Cho In-Ho
|
|
|
Abstract
|
|
|
|
This study was to evaluate the stress distributions of prefabricated, customized abutments and fixtures according to their material and shape by three-dimensional finite element analysis. And to investigate the fatigue life and fracture characteristics. Mandibular models were fabricated by reconstruction of the CT scan of patients with normal occlusion. A total of six finite element models were designed, a load of 100 N was applied on the buccal cusps vertically, and 30 degree obliquely. 10 specimens each were fabricated for the more clinically widely used 4 type abutments and were loaded according to ISO 14801. Differences in stress distribution patterns were not found according to the materials of the abutments and fixtures. But a slight difference in the stress level was detected. Customized abutment groups showed lower crown stress levels. Onepiece zirconia implant showed the lowest bone stress levels. In the fatigue test, highest values were measured in group 7. Prefabricated abutments showed less variation of fatigue life (P<0.05). Use of customized abutments can improve the fracture resistance of restorations. Especially, use of customized zirconia abutments reinforced by titanium screw connecting parts is recommended.
|
|
|
KEYWORD
|
|
|
CAD/CAM, Customized abutment, Fatigue failure, Finite element analysis, Zirconia
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|