Patent ID: 8029285

Claim:
A screw-type dental implant for insertion into a bore hole arranged in a human jaw bone, said dental implant comprising: a cancellous portion presenting an outer surface which has an apical part with a macro threading and a coronal part with a micro threading, and a cortical portion having an axial length such that, when installed in the bore hole, the engagement of said cortical portion with the jaw bone will generally be confined to the cortical bone tissue layer, said cortical portion presenting a conical outer surface which has a micro threading for accomplishing said engagement and which has a conical taper such that said conical outer surface forms, at a transversal border plane between said conical outer surface of the cortical portion and said outer surface of the cancellous portion, a non-zero angle of less than 5° in relation to the outer surface of the cancellous portion, wherein the micro threading of the cortical portion and the micro threading of the coronal part of the cancellous portion meet at the transversal border plane, the micro threading of the cortical portion continues uninterrupted across the transversal border plane and a maximum diameter of the dental implant is located in the cortical portion.