Experimental substantiation of acetabular component impaction with uncoverage in arthroplasty of patients with severe hip dysplasia

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Purpose. Estimation of critical value of acetabular component uncoverage enabling its implantation without an additional support. Methods. A comparative analysis of an original method for intraoperative measurement of uncoverage space of acetabular component based on the measurement of the depth of uncovered sector with X-ray control by the same technique was carried out. Mathematical computer modeling based on the finite element techniqueand the mechanical experiment were performed. Critical values of uncoverage enabling safe primary fixation of acetabular component were estimated in designed models. Results. High rate of coincidence of direct intraoperative and postoperative measurements by radiograms was obtained, testifying to the possibility of application of this technique of uncoverage estimation at the stage of preoperative X-ray planning in patients with different degree of dysplasia. Using the finite element technique and the mechanical experiment on pelvis models, a possibility of mounting anacetabular component with moderate uncoverage within 25% without screws and with significant uncoverage to 35% with additional two screws fixation was demonstrated.

About the authors

R. M. Tikhilov

Vreden Russian Research Institute of Traumatology and Orthopedics; Mechnikov North-Western State Medical University

Author for correspondence.
Email: info@rniito.org
Russian Federation

I. I. Shubnyakov

Vreden Russian Research Institute of Traumatology and Orthopedics

Email: shubnyakov@mail.ru
Russian Federation

A. V. Mazurenko

Federal Centre of Traumatology, Orthopedics and Arthroplasty

Email: amazourenko.home@inbox.ru
Russian Federation

V. I. Mitryaikin

A.N. Tupolev Kazan National Research Technical University

Email: kati_mit@mail.ru
Russian Federation

O. A. Sachenkov

N.I. Lobachevsky Institute of Mathematics and Mechanics of Kazan (Volga region) Federal University

Email: 4works@bk.ru
Russian Federation

A. K. Kuzin

Institute Of Metallurgy, Mechanical Engineering and Transport

Email: kuzin_aleksei@mail.ru
Russian Federation

A. O. Denisov

Vreden Russian Research Institute of Traumatology and Orthopedics

Email: med-03@yandex.ru
Russian Federation

D. G. Pliev

Vreden Russian Research Institute of Traumatology and Orthopedics

Email: plievd@gmail.com
Russian Federation

A. A. Boyarov

Vreden Russian Research Institute of Traumatology and Orthopedics

Email: bojaroffaa@mail.ru
Russian Federation

A. N. Kovalenko

Vreden Russian Research Institute of Traumatology and Orthopedics

Email: ankovalenko@rniito.ru
Russian Federation


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