Comparative Study Of CCB's Biomechanics Property

Objective: After implantation the biomechanical environment around prosthesis will change. Detect the mechanic conduction property of CCB; make a comparative study concerning different conditions. Provide data to better the design of CCB.Methods: Establish models of femur and CCB; imitate the condition when standing on one foot and compare the biomechanical environment in different conditions. Set in three group: 1, prosthesis without hole on the side wall compare with CCB; 2, compare the condition before and after the connection between the hollow part of prosthesis and the surrounding bone tissue; 3, shortening the length of the prosthesis, detect the mechanics property and make a comparation.Deal with the data using Microsoft Excel 2000.Results: 1. Making holes on the lateral side of the prosthesis lower the maxim stress, however, the stress around the hole does not change obviously.2. After connection between the hollow part of the prosthesis, the stress around the holes does not increase, meanwhile, the stress on the lateral side does not change obviously.3. After shortening the length of the prosthesis, the mechanic conduction style remains the same; however, the stress near the hole increase so much. The stress around the lower hole is higher, and in all these conditions the direction of force around the holes is basically the same.Conclusions: 1. Hole on the lateral side can lower the maxim stress on the lateral side. 2. After connection between the hollow part of the prosthesis, the stress around the holes does not increase obviously, always at a low level; so enlarging the diameter of the hole is available.3. Shortening the length of the prosthesis will enlarge the biomechanical effect of the design.