SCREW IMPLANT FOR JAW BONE WITH CORONAL COMPRESSION THREAD AND APICAL SELF-TAPPING THREAD Russian patent published in 2017 - IPC A61C8/00 

FIELD: medicine.

SUBSTANCE: screw implant for a jawbone with a coronal compression thread screw with threads and an apical self-tapping thread with threads, thread pitches are substantially identical. Compression thread is apically adjacent to the implant coronal head thread for the final placement at least in the cancellous bone to which the cutting thread is apically adjacent for the final placement at least in the apical cortical bone medium. Core diameter and the outer diameter of compression thread at least in its apical region varies conically with narrowing from the coronal portion to the apical portion. The axial length of compression thread varies mainly from the two- to fifteen +/-25% values of the cutting thread axial length. Radial depth of the cutting thread depth exceeds the radial depth of compression thread in the apical part, preferably by 1.5 +/-25%. Angle (β) of the compression thread wedge exceeds the angle (α) of the cutting thread wedge, preferably by 1.5 +/-25%.

EFFECT: invention can reduce the screwing power to increase not only the time before the first load application after implantation due to high primary implant stability, but also to strengthen the retention and stability after the implantation period, the implant can be used in immediate loading protocols.

21 cl, 6 dwg