A clinical example of a bioresorbable malleolar screw application for osteosynthesis of the medial malleolus

Abstract

The aim of the work: to study the clinical potential for use of an original MS-10 magnesium-based bioabsorbable malleolar screw in osteosynthesis of the medial malleolus. Materials and methods. In the course of the study, we tested the osteosynthesis of the medial malleolus of the tibia using a bioresorbable modified MS-10 magnesium alloy implant and evaluated the clinical course of the early and late postoperative period, the response of soft tissues, the radiological dynamics of fracture consolidation, and restoration of limb function. Osteosynthesis was performed using the malleolar screw of 3.5 mm-diameter with incomplete threading made of the bioresorbable modified MS-10 magnesium alloy (TS U 24.4-14307794-270:2018). The patient follow-up time was 7 months. X-rays of the ankle joint were performed at 6 week-intervals in2 in standard views, CT was performed during the 5th week. Results. During the period from the 1st to the 8th week, the patient X-ray examinations showed slight emphysema in the surrounding soft tissues and in the cancellous bone of the distal metaepiphysis of the tibia that was not accompanied by clinical manifestations and complications. Bioresorption of the magnesium implant did not change the time of soft tissues healing and the bone callus formation in the fracture zone. At the late stages of bioresorption (after the 18th week), the signs of pronounced ossification were seen around the magnesium implant. Conclusions. Based on the experimentally obtained data, we can conclude that it is possible and advisable to use bioresorbable implants made of the original MS-10 magnesium alloy in osteosynthesis.

Keywords

• osteosynthesis
• bioresorbable alloys
• magnesium