[Three dimensional finite element analysis of stress distribution of bone tissues around abutments in telescope fixed bridge supported by tooth-implant].
OBJECTIVE
To study the stress distribution of bone tissues around the abutments in telescope fixed bridge supported by tooth-implant.


METHODS
A patient with loss of the left first mandibular molar was used as the subject. Two partial fixed denture models were established. One model (model I) was supported by the second premolar and implant in the second molar, the other model (model II) was supported by the second premolar and implant other than the second molar. Under decentralized vertical and oblique loads, the stress distribution of bone tissues around the tooth and implant was evaluated by three dimensional finite element analysis.


RESULTS
Under decentralized vertical load, the max EQVs of the bone tissues around the tooth and implant in model I were 2.58MPa and 43.92MPa, and 2.17MPa and 20.23MPa in model II. Under decentralized oblique load, the max EQVs of the bone tissues around the tooth and implant in model I were 2.23MPa and 46.37MPa, and 1.91MPa and 21.19MPa in model II.


CONCLUSIONS
The stress surrounding the implant is declined by the buffer of telescope retainer, and the decline is not different under the two loads. In designing the fixed bridge supported by tooth-implant, we can design telescope retainer on implant to reduce the stress of bone tissues around the implant and to prevent damages to bone tissues.
Xie
Guang-Ping
GP
Medical College of Huzhou Normal College, Huzhou 313000, Zhejiang Province, China.
Chen
Ye
Y
Han
Dong-Wei
DW
D001641:Bicuspid; D000044:Dental Abutments; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D008963:Molar; D010513:Periodontal Ligament
D015921:Dental Implants