[Surgical repair of gluteus medius muscle in hip replacement surgery]. / Metodiki khirurgicheskogo lecheniia povrezhdenii srednei iagodichnoi myshtsy pri total'nom éndoprotezirovanii tazobedrennogo sustava.

Injury of gluteus medius muscle is a serious often complication after hip replacement surgery followed by pain, claudication and significant deterioration of the quality of life. Prevention of intraoperative injury of this muscle is especially relevant in young patients. Normal function of this muscle provides rapid rehabilitation and early postoperative recovery. However, hip replacement surgery through Hardinge's direct lateral approach is accompanied by fatty degeneration of gluteus medius muscle in 12-20% of cases. Moreover, two or more redo procedures lead to fatty degeneration of almost 70% of anterior and 40% of central muscular segment. Currently, there are many methods of surgical treatment of this complication including transosseous muscle fixation, endoscopic procedures, repair using Achilles tendon, gluteus maximus muscle, lateral head of quadriceps muscle and allografts. However, various publications devoted to this problem have certain disadvantages including short follow-up period, small sample size and often unsatisfactory outcomes. Therefore, the question of surgical repair of hip abductor function remains open.

[Additive technologies for complete recovery of joint function in revision endoprosthesis surgery (experimental trial)]. / Additivnaia tekhnologiia v polnom vosstanovlenii funktsii sustava pri éndoprotezirovanii (éksperimental'noe issledovanie).

AIM: Experimental analysis of the strength properties of integration of muscle tissue, tendons and ligaments, bone tissue into titanium highly porous materials prepared by using of additive technologies. MATERIAL AND METHODS: The study included 9 mature rabbits of the Chinchilla breed. Both posterior paws and latissimus dorsi muscles (36 specimens) were used. Titanium models (Ti-6-Al-4-V, 'Rematitan', Germany) were made by additive technologies with preliminary prototyping, the prototypes had a highly porous mesh structure. RESULTS: It was developed experimental model of functional bone defect involving points of attachment of the muscle and ligaments. Strength of attachment of muscles to highly porous implants was 145 H vs. 31 H for standard models. Tensile strength for fixation to bone tissue was 84 H vs. 152 H in the main group. CONCLUSION: It was found integration of soft tissues and bones into highly porous titanium implants prepared with additive technologies. Fixation strength significantly exceeds that for standard models.