ARTIFICIAL ROOT OF TOOTH,申请号JP19890126024-传众专利搜索

ARTIFICIAL ROOT OF TOOTH

申请公布号：JPH02305570(A)

申请号：JP19890126024

申请日期：1989.05.19

申请公布日期：1990.12.19

申请人：

TDK CORP

发明人：NONAMI TOORU

分类号：A61C8/00

主分类号：A61C8/00

摘要：<p>PURPOSE:To prevent the occurrence of a crack and breakage by a method wherein a curved part between a stage part and a small part forms an R-surface or the staged part forms a slope or the small part is formed in the shape of a taper. CONSTITUTION:The artificial root of a tooth is formed with a body part 1A, a staged part 2, and a small part 3, and a portion (e) between the stage part 2 and the small part 3 forms an R-surface. The curvature of radius of an R-surface curved part responds to the size of the artificial root of a tooth or is set to a value in a range of 0.5-50mm from a point of view of dispersion of stress and prevention of the occurrence of a crack. The stage part 2A forms a slope, and the angle of the staged part 2A with a horizontal plane is set to a value higher than a right angle. The small part 3A is formed in the shape of a taper and the angle of the stage part with the small part 3A is set to a value higher than a right angle. Through combination of the staged part 2A forming a slope and the small part 3A in the shape of a taper, an angle alpha of the stage part 2A with the small pact 3A is set to a high value. A top part (i) of the small part 3A is rounded, and by rounding a peripheral pert (j) of the stage part 2A and a lower part (k) of a body part 1B, stress concentration is relaxed, and a shape in which a crack and chipping off are difficult to occur can be realized.</p>