【摘要】 【目的】探讨垂直型球帽状附着体的固位力衰减情况。【方法】在上颌标准石膏模型上制作垂直型球帽状附着体的固位力测试件,进行1000次就位/脱位循环实验,每进行100次就位/脱位循环后,在材料力学试验机上重复10次测定其固位力,并观察其固位力的衰减情况。【结果】垂直型球帽状附着体的固位力测试件每进行100次就位/脱位循环后的固位力分别为4.40,4.37,4.26,3.73,3.50,3.09,2.82,2.78,2.23和2.21N。以循环次数、固位力作变量x、y,求得线性回归方程:Y=4.816-0.0027x,β=-0.0027(P<0.05)。【结论】垂直型球帽状附着体的固位力随着就位/脱位循环次数的增加而逐渐降低。更多还原

【Abstract】 To investigate the decreasing tendency of retentive force of vertical easy ball attachment(VEBA). On a standard maxillary stone model, a piece of VEBA was fabricated and then given one thousand joining and separating cycles. After every 100 cycles, its retentive force was measured repeatedly ten times on Hounsfield Test Equipment. Then the decreasing tendency of retentive force of VEBA was analyzed. The retentive force of VEBA was 4.40, 4.37, 4.26, 3.73, 3.50, 3.09, 2.82, 2.78, 2.23 and 2.21 N respectively after every 100 joining and separating cycles gradually. Using the number of joining and separating cycles and the retentive force of VEBA as variable x and y, a regressive formula was gained: Y=4.816-0.002 7x, β= 0.002 7 (P < 0.05). [Conclusion]With the increase of joining and separating cycles of VEBA, its retentive force decreases gradually.更多还原