抄録
We used two kinds of implant materials, clinical bone screw for control, titanium alloy dual locking screw. These samples were implanted into wood. Torsional and bending strength between the implant materials and wood was measured by torsion and bending tests with an Instron-type universal testing machine. There were no differences in torsional strength of bone screw and dual locking screw at rotation angle ±10°. Torsional strength was greatest in bone cement reinforced bone screw compared with other groups, but there was no significant difference between apatite cement reinforced bone screw and bone screw at rotation angle ±15°. The mean ultimate bending load of the Type S(bone screw)was(5.4±0.36 kN), Type D(dual locking screw)(3.8±0.23 kN), Type S(A)(bone screw with apatite cement)(1.2±0.4 kN)and that of the Type S(B)(bone screw with bone cement)(2.5±0.7 kN). In torsional test, the effect of the apatite and bone cement was positive, and in bending test, it was negative.
