Background and Objectives: Total knee arthroplasty (TKA) is the most effective treatment method for end-stage osteoarthritis. One of the most important aspects of this surgery is adequate implant positioning, as it guarantees the desired outcome of restoring limb biomechanics. Surgical technique is being continuously improved along with hardware development. There are two novel devices designed to help establish proper femoral component rotation: soft-tissue tensor and robotic–assisted TKA (RATKA). This study compared the femoral component rotation achieved with the use of three methods: RATKA, soft tissue tensioner and the conventional measured-resection technique, all of them utilizing anatomical design prosthesis components. Materials and Methods: A total of 139 patients diagnosed with end-stage osteoarthritis underwent total knee arthroplasty between December 2020 and June 2021. After the surgery, they were divided into three groups depending on procedure technique and implant type: Persona (Zimmer Biomet) + Fuzion Balancer, RATKA + Journey II BCS or conventional TKA + Persona/Journey. Postoperatively, a computed tomography examination was performed in order to measure femoral component rotation. All three groups were compared independently during statistical analysis. Fisher’s exact, Kruskal–Wallis and Dwass–Steel–Crichtlow–Fligner tests were used for particular calculations. Results: Statistically significant differences in femoral component rotation between groups were noticed. However, in terms of values other than 0° in external rotation, no significant variance was revealed. Conclusions: Additional total knee arthroplasty instruments seem to improve the outcomes of the surgery, providing better component positioning than in the conventional measured-resection technique based only on bone landmarks.

Background: Osgood–Schlatter disease (OSD) occurs mainly in physically active adolescents, causing significant physical activity restrictions. The aim of this study is to compare the effectiveness of treating OSD with leukocyte-rich platelet-rich plasma (LR-PRP) depending on the duration of the disease and to attempt to develop an alternative treatment method to the currently used conservative therapy. Methods: Treatment efficacy was evaluated using the VAS, Tegner, Lysholm, and KOOS scales. Subject satisfaction, return to sports activity, potential adverse effects, and X-ray evaluation were likewise used to assess the success of the procedure. Results: Analysis across all scales showed statistically significant treatment effectiveness with LR-PRP in both groups of patients. When comparing the two groups, significantly better treatment outcomes were achieved in the acute phase of OSD. Treatment satisfaction in the acute OSD group was 95%, compared to 64% in the chronic group. The MCID value after LR-PRP injection in acute OSD compared to chronic OSD reached 100% vs. 81% on the VAS scale, 95.5% vs. 55% on the Tegner scale, 95% vs. 47% on the Lysholm scale and 91% vs. 27% on the KOOS scale. No adverse effects were recorded in either group. Conclusions: The high efficacy of LR-PRP treatment in patients with acute OSD, in correlation with high safety, as well as rapid and lasting results, can be an effective and beneficial alternative to conservative treatment. This single procedure seems particularly justified in a group of young professional athletes, where absence from training can lead to serious consequences.

Introduction Femoral neck fracture is one of the most common orthopaedic traumas affecting the elderly population. The standard treatment method is hip hemiarthroplasty and total hip arthroplasty. In hip hemiprostheses surgeons mainly have to reconstruct the femoral offset and limbs’ length to...

Introduction: Total hip arthroplasty (THA) is nowadays considered as the most effective treatment option for end-stage hip osteoarthritis (OA) and one of the most successful orthopedic procedures. Precise reproduction of the center of rotation (COR) is among the most important aspects of...

Introduction: Total knee arthroplasty (TKA) is a commonly performed surgery that can successfully treat end-stage osteoarthritis (OA). Obesity is a known risk factor for OA and its progression, but its impact on postoperative satisfaction and implant sizing remains unclear. The current study aimed to assess the association of preoperative body mass index (BMI) and lower limb dimensions with TKA component sizing and patient-reported outcomes. Material and methods: We retrospectively assessed 108 patients (43 males, 65 females) undergoing primary TKA with a Journey II BCS prosthesis, without patellar resurfacing, between January and November 2023. The mean patient age was 67.4 ±4.1 years, with a mean BMI of 29.3 ±3.9 kg/m². Patients were divided into 2 groups based on BMI: normal weight (< 25; n = 41) and overweight/obese (≥ 25; n = 67). Lower limb widths and component sizes were obtained from postoperative radiographs and protocols. Clinical outcomes were evaluated using the KOOS and WOMAC questionnaires. Statistical analysis was performed to assess correlations between BMI, limb dimensions, implant size, and patient satisfaction. Results: Significant differences were found between the normal-weight and overweight patients in the diameters of the femoral (15.8 ±2.1 cm vs. 17.3 ±1.9 cm, p = 0.02) and lower leg (14.0 ±1.5 cm vs. 12.5 ±1.2 cm, p = 0.002) areas. However, no significant correlation was found between BMI, limb dimensions, and implant size for the femoral (p = 0.94) and tibial components (p = 0.48). Although patient-reported outcomes were similar between groups, with slightly better results in the normal-weight group, no statistical significance was found. Conclusions: Body mass index affects lower limb sizes but does not predict implant sizing in TKA. Furthermore, no difference in patient satisfaction postoperatively between BMI categories was observed. The findings indicate that demographic factors may not be adequate to achieve precision in preoperative templating. Instead, surgical planning should be individualized, based on comprehensive anatomical measurements.

Background and Objectives: The safe zone in total hip replacement was introduced many years ago. Its aim was to provide guidelines for orthopedic surgeons in order to avoid complications such as instability. With the growing interest in spinopelvic alignment, some new insights suggest that the safe zone is an obsolete concept. This study aims to show that, even outside the safe zone, the effect of total hip replacement can be satisfactory. This could be used as preliminary study for an analysis of a larger group. Materials and Methods: Fifty-nine consecutive patients with end-stage osteoarthritis treated by total hip replacement were enrolled into the study and divided into two groups: inside the safe zone and outside the safe zone. A physical examination during postoperative visits was performed; the range of movement was measured using a goniometer; and the HHS and VAS were taken to measure functional outcomes and pain, respectively. An analysis of the radiological outcomes was performed. Results: There was no significant difference in regard to changes in total offset, pain, HHS and other complications. There were no signs of instability among patients during the follow-up. Conclusions: The results of this study show that the “safe zone” is a more complicated term that was previously thought. A proper soft tissue balance and spinopelvic alignment could be factors that change the “safe zone” for each patient and make it more individual.