An Investigation Of Relationship Between Cantilever Arm Length And Implant Place Of Maxillary Whole Dentition Fixed Bridge And Stress Distribution

Objective: To develop the stress distribution variation when restore maxillary edentulous jaw with different cantilever arm length and implant place, to get a better design proposal. Methods: combining spiral CT scanning, digital image transfer and a series of computer software to construct the finite element model of upper jaw and maxillary whole dentition fixed bridge, comparing the stress analysis results by 3 experiments. Results: Successfully construct the 3-D finite element model. The stress value of implant cervical part is increasing with the cantilever arm length grows up. The variation of implant position will have certain impact on the stress distribution. Conclusion: The method to construct 3-D finite element model of upper jaw and maxillary whole dentition fixed bridge is feasible. Among the three models of maxillary whole dentition fixed bridge, it is more proper when the cantilever arm length is 12mm. The stress distribution of Model I is more reasonable than that of Model II, and the cantilever arm length could be extended properly.