Implants for one-stage osteointegration with mechanobiological stimulation of bone formation

Abstract

The paper presents the results of studies of one-stage osseointegration of new threaded implants made of Ti6Al4V alloy into the leg stump of mongrel dogs. The design of the implants has a combined geometry of the surface, consisting of a leading-in cutting-gauge part and a persistent thread with a large pitch. The cutting and calibrating part is a tap with grooves in which bone chips accumulate, contributing to bone formation of the regenerate. The implant contains a support-antiseptic belt for creating a compression load with a porous structure for antiseptic preparations. The implant was made by selective laser fusion on an EOSINT M280 installation. The implants were integrated into the shin stump of three dogs with a compression load of 20 N. X-ray and morphological studies after 180 days of the experiment revealed the stability and survival of the implants with bone formation along the entire length.