Saratov JOURNAL of Medical and Scientific Research

ACL plastics

Determination of anterior cruciate ligament attachment with radiographic quadrant method to analyze complications following anterior cruciate ligament reconstruction

Year: 2019, volume 15 Issue: №3 Pages: 653-656
Heading: Traumatology and Orthopedics Article type: Original article
Authors: Sadykov R.Sh., Bogatov M.B.
Organization: First Moscow State Medical University n.a. I.M. Sechenov, Saratov State Medical University
Summary:

Objective: to demonstrate the potential of radiographic quadrant method for defining the correspondence of the administered femoral tunnel to the anatomical anterior cruciate ligament attachment. Material and Methods. We have surveyed 18 patients aged 23 to 36 yo. (mean age 26±2 yo.) who had underwent ACL arthroscopic transtibial plastic reconstruction in 2012-2014, and had post- surgical ACL graft rapture or knee joint instability. All patients had their knee joints X-raid in standard projections. Bernard and Hertel radiographic quadrant method was employed to take lateral view pictures for defining the accuracy of the administered femoral tunnel. Results. In all cases the sites of the administered femoral tunnels did not match ACL anatomic attachments, defined with Bernard and Hertel grid. Conclusion. Radiographic quadrant method of defining ACL anatomic attachments can be used for post-surgery complications analysis.

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Computer modeling of biomechanical systems «femoral bone — endoprosthesis / transplant — tibia» in different methods of anterior cruciate ligament plastics in knee joint

Year: 2017, volume 13 Issue: №3 Pages: 764-768
Heading: Traumatology and Orthopedics Article type: Original article
Authors: Shormanov A.M., Ivanov D.V., Norkin A.l., Ulyanov V.Yu., Bakhteeva N.Kh., Klimov S.S., Chibrikova Yu.A.
Organization: Saratov State Medical University
Summary:

The aim: to specify the indices of dislocation (displacement) and effective stress in biomechanical systems «femoral bone — endoprosthesis / transplant — tibia» in different methods of anterior cruciate ligament by computer modeling of a knee joint geometrically, physically and mechanically similar to human. Material and Methods. Steady-state tasks of the stress given on a knee joint after anterior cruciate ligament plastics fulfilled by different methods were resolved numerically by the method of finite elements implemented in the system of finite element analysis. Results. Maximum dislocations comprised 3.45 mm. for the method of single-beam plastics of ACL, 0.35 mm. for two-beam plastics and 0.93 mm. for plastics with semi-tendinous and gracilis tendons. Maximum stress were 1190 MPa for single-beam plastics of ACL, 141 MPa for two-beam plastics and 150 MPa for plastics with semi-tendinous and gracilis tendons. Conclusion. Finite element modeling of different ways of ACL plastics indicates higher stability of synthetic endoprosthesis under rising stress in case of two-beam plastics and transplant of semi tendinous and gracilis tendons compared to the single-beam plastics.

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