| 摘要 |
PCT No. PCT/SE97/00212 Sec. 371 Date Mar. 13, 1997 Sec. 102(e) Date Mar. 13, 1997 PCT Filed Feb. 12, 1997 PCT Pub. No. WO97/29713 PCT Pub. Date Aug. 21, 1997The present invention relates to a thread or oriented macroroughness for bone implants, particularly threaded dental implants, a section of said thread or roughness (i.e. the profile) comprising two flanks, a top radius R at the apex formed by the intersection of said two flanks, a bottom radius r formed at the bottom of the groove between two adjacent threads or roughnesses, said flanks forming an angle v with a plane which is perpendicular to a cross-section of said thread or roughness and perpendicular to the surface of the implant body, said profile further having a height D. According to the invention the dimensions of the thread or roughness are subject to the following restrictions: for 10 DEG </=v<35 DEG , R is greater than 0.4xD and that, for 35 DEG </=v<55 DEG , R is greater than 0.2xD. In a preferred embodiment the restrictions are: for 0.05 mm</=D</=0.5 mm and 35</=v</=55 DEG , the top radius R is larger than 0.2xD but smaller than D, and in that, for 0.25 mm</=D</=0.5 mm and 10 DEG </=v<35 DEG , R is greater than 0.4xD but smaller than D. FIG. 1.
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