Screw thread implant

Abstract

Abstract The 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° « v < 35°, R is greater than 0.4 x D and that, for 35° « v « 55°, R is greater than 0.2 x D. In a preferred embodiment the restrictions are: for 0.05 mm « D « 0.5 mm and 35° « v « 55°, the top radius R is larger than 0.2 x D but smaller than D, and in that, for 0.25 mm « D « 0.5 mm and 10° « v < 35°, R is greater than 0.4 x D but smaller than D.

Inventors

• 👤 Stig Hansson

Bibliographic Details