[Three-dimensional finite element analysis of stress in supporting bone of mandibular posterior fixed bridge. II. Stress distribution of the cortical bone beneath pontic of fixed bridge].
OBJECTIVE
Stress distribution of the cortical bone beneath the pontic of the fixed bridge was observed.


METHODS
The three-dimensional finite element model was developed. 6 loadings were applied respectively and the Maximum Stress (epsilon max) and the Minimum Stress(epsilon min) of the cortical bone beneath the pontic of the fixed bridge were calculated.


RESULTS
The stress values were very small before the bridge was inserted. After the bridge was inserted the stress increased, but the stress level in the cortical bone was much lower than that in the alveolar bone. The stress values of the cortical bone were only 9.5% (vertical loading) and 2.2% (horizontal loading) of the alveolar bone's.


CONCLUSIONS
The stress value of the cortical bone beneath the pontic was very small. The load was born mainly by supporting tissue around the bridge abutment.
Tang
L
L
Department of Stomatology, Medical College, Jinan University.
Chen
G
G
D000539:Alveolar Process / Q000502:physiology*; D000044:Dental Abutments; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D006801:Humans; D013314:Stress, Mechanical