[Robot-assisted choledochal cyst resection in a child].

The generally accepted method for choledochal cysts is total resection of cystic extrahepatic bile ducts and gallbladder followed by biliodigestive anastomosis. Minimally invasive interventions have recently become the «gold» standard in pediatric hepatobiliary surgery. However, laparoscopic resection of choledochal cysts has certain disadvantages related to difficult positioning of instruments in narrow surgical field.

Minimally Invasive (Epivastus) Approach for Total Knee Arthroplasty.

Unlabelled: was to assess the efficiency of a developed minimally invasive (epivastus) approach in total knee arthroplasty (TKA) by comparing its early results with those of a standard medial mediapatellar approach (MMPA).

Materials And Methods: A single-center, comparative randomized prospective study involved 127 patients, who underwent TKA using MMPA (n=62) and a modified minimally invasive epivastus approach (n=65) within the period from January to December, 2022. The study groups were comparable by gender, age, BMI, gonarthrosis stage, and knee joint functioning parameters.

Use of Additive Technologies in Surgical Treatment of Chronic Posterior Dislocations of the Shoulder.

Unlabelled: was to evaluate the efficiency of additive technologies in surgical treatment of patients with osteochondral defects of the humeral head articular surface against the background of chronic posterior dislocation of the shoulder by means of comparing clinical and radiological results with the McLaughlin procedure.

Materials And Methods: A prospective randomized comparative group clinical study was conducted, which included 20 patients who in 2019-2021 underwent surgical treatment of chronic posterior dislocation of the shoulder in the Traumatological and Orthopedic Department of the Institute of Traumatology and Orthopedics of the Privolzhsky Research Medical University (Nizhny Novgorod, Russia). Depending on the type of surgery, all patients were divided into 2 groups: group 1 (n=10) was subject to McLaughlin procedure, whereas group 2 (n=10) - to reconstruction of the humeral head using a customized implant based on additive technologies (3D printing).

Topological solitons in arrays of modelocked lasers.

We report spatiotemporal topological solitons in an array of modelocked lasers. In its conservative limit, our model reduces to the famous Su-Schrieffer-Heeger system possessing topological states inside the gap of its linear spectrum. We report one-dimensional spatial and two-dimensional spatiotemporal topological solitons, i.