Femoral Fixation Research Articles

Case Report: Winkelmann hip rotationplasty as a last-resort solution

BackgroundRotationplasty, an invasive surgery, serves as an alternative to amputation in pediatric orthopedic oncology. It is currently applied in broader cases (e.g., infection, trauma, or malignant tumors). Winkelmann Type BII rotationplasty is a rare procedure with limited literature. Furthermore, no description of rotationplasties where the femur is attached to the sacroiliac joint has been published to date.MethodsBetween September 2022 and March 2023, three patients underwent Type BII rotationplasty. We used the Clavien-Dindo classification to describe postoperative complications and the musculoskeletal tumor society score (MSTS) for functional result assessments.ResultsOne patient suffered from multiple complications during the first 6 months postoperatively, one presented a single complication, and one had no complications after 4 and 3 months postoperatively, respectively. Two patients could walk pain-free with the help of crutches. One patient developed a crack on the femur, which did not require surgical revision. They all achieved satisfactory joint amplitudes of at least 50° in passive hip flexion. Unfortunately, one of the patients suffered from lung metastases.ConclusionsWinkelmann's Type BII rotationplasty is a reliable alternative to hindquarter amputation. Furthermore, we demonstrated that complete resection of the iliac wing and femur fixation through the sacroiliac joint is feasible.

Adverse Outcomes After Cemented and Cementless Primary Elective Total Hip Arthroplasty in 60,064 Matched Patients: A Study of Data From the Swedish Arthroplasty Register.

The choice between cemented and cementless fixation in primary elective total hip arthroplasty (THA) remains a subject of ongoing debate. However, comparisons between the two are subject to limited adjustments for patient characteristics, diagnoses, and surgical factors, as well as by limited outcome time endpoints. Our study aimed to compare the effect of femoral fixation on safety and implant survival outcomes in matched patients. Using propensity score techniques, we matched patients undergoing cemented (n = 101,523) and cementless (n = 52,996) primary elective THA in the Swedish Arthroplasty Register (SAR) based on age, sex, American Society of Anesthesiologists (ASA)grade, body mass index (BMI), hospital type, and pre-operative diagnosis between 2008 and 2018. We used both regression and survival models for 30, 60, and 90 days, as well as one and two years, to compare outcomes, including mortality, revision, and periprosthetic femoral fracture necessitating revision surgery. There were 30,032 cementless femoral fixations one-to-one matched with cemented ones using the Gradient Boosting Machine (GBM) modeling to estimate the propensity score. Regression analyses showed that cementless fixation had lower mortality outcomes (OR [odds ratio] 0.73, 95% CI [confidence interval] 0.69 to 0.78, P < 0.001), but significantly worse revision (OR 1.51, 95% CI 1.38 to 1.65, P < 0.001) and periprosthetic femoral fracture (OR 2.40, 95% CI 1.92 to 2.99, P < 0.001). Kaplan-Meier survival models showed statistically significant lower mortality risks for uncemented fixation at the 2-year interval (HR [hazard ratio] 0.82, 95% CI 0.71 to 0.94, P = 0.006), but not at earlier endpoints. Revision and periprosthetic femoral fractures were both higher for cementless rather than cemented fixation. This study found no significant differences in early mortality between cemented and cementless femoral implants. However, cementless fixation was associated with increased risks of revision and periprosthetic femoral fractures. These findings emphasize the importance of considering implant choice in the context of individual patient characteristics and surgical priorities to optimize outcomes in total hip arthroplasty.

Posterolateral Knee Ligament Reconstruction Using the Arciero Technique Provides Greater Rotational Stability Than the Modified Larson Technique: A Biomechanical Study

Background: It is still unknown if the double–femoral tunnel technique (Arciero [ARC]) provides better stability as compared with the single–femoral tunnel technique (modified Larson [LAR]) in posterolateral corner reconstruction. The ideal angle of fixation of the popliteofibular strand in ARC is also unknown. Hypotheses: The ARC provides greater external rotation (ER) stability than the LAR (hypothesis 1); there is no difference in varus rotation (VR) stability between LAR and ARC (hypothesis 2); and femoral fixation of the popliteofibular strand at 60° during the ARC leads to greater ER stability than fixation at 30° or 90° of knee flexion (hypothesis 3). Study Design: Controlled laboratory study. Methods: Eight fresh-frozen human knees were tested in a knee test bench in 4 states: native, posterolateral deficiency, LAR, and ARC. With the ARC, the popliteofibular strand was fixed at 30°, 60°, and 90° (ARC30, ARC60, ARC90). The order of testing (LAR/ARC) was randomized. A tibial ER and VR torque of 5 N·m was applied at 0°, 30°, 60°, and 90°. Rotation degrees were captured using an ultrasound-based analysis system. Wilcoxon signed rank tests were used to assess statistical significance between paired groups in different states. Results: The ARC and LAR significantly improved VR and ER stability at all flexion angles in comparison with posterolateral deficiency (P < .05). At 60° and 90°, ARC30 showed significantly greater ER stability in comparison with the LAR (mean ± SD; ARC30 vs LAR at 60°, 21.2°± 5.1° vs 15.4°± 5.6° [P < .05]; ARC30 vs LAR at 90°, 23.7°± 5.6° vs 16.8°± 6.3° [P < .05]). At 90°, the LAR showed significantly greater VR instability in comparison with the native state (3.5°± 1.5° vs 2.5°± 1.0°; P = .012), and ARC30 was not significantly different from the native state with respect to VR (2.9°± 1.5° vs 2.5°± 1.0°; P = .327). No significant differences in ER and VR were found among ARC30, ARC60, and ARC90 at any flexion angle (P≥ .05). Conclusion: The ARC technique provided greater tibial ER stability in comparison with the LAR at higher flexion angles (hypothesis 1 accepted). There were no differences between LAR and ARC in restoring VR stability, except at 90° (hypothesis 2 partly accepted). Different femoral flexion angles for fixation of the popliteofibular strand during the ARC did not show any significant differences in relation to knee stability (hypothesis 3 rejected). Clinical Relevance: Posterolateral corner reconstruction using the ARC technique provides greater ER stability at higher flexion angles than the modified LAR technique.

Survey of Orthopedic Surgeons' Perceptions of Adopting an Initiative With Cemented Hip Hemiarthroplasties for Fractures.

Hip hemiarthroplasty is a surgical procedure that requires the adhesion of the prosthetic implant by utilizing a fixation technique, either cemented or noncemented. The current literature does not provide a clear recommendation on a superior technique, although many countries outside the US have guidelines recommending cemented over noncemented procedures. Further, surgeon perceptions and beliefs related to the cemented and noncemented techniques in hip arthroplasty fractures are generally unknown. Orthopedic surgeon leaders adopted a quality assurance initiative to increase the rate of cemented cases within their practice. A survey was developed to capture the surgeons' perceptions related to fixation technique, affordability, and potential barriers and facilitators. Likert scale data were analyzed with descriptive statistics and chi-square tests. Sixty-one total joint surgeons throughout 13 locations were invited to participate in the study via email. A total of 38 of the 61 total joint surgeons completed the survey, representing a 62% response rate. Most responses were neutral or disagreed with the use of cement for femoral fixation in hemiarthroplasty. Although some questions elicited strong opinions, many surgeons expressed hesitancy to change their current fixation technique and their desire for autonomy within their clinical practices. However, the large number of neutral responses suggests the potential to engage, educate, and shift the surgeons' perception to adopt the quality assurance initiative and increase the rate of cemented cases.

Superolateral capsule pathway: a new arthroscopic viewing approach for spotting femoral fixation device in anterior cruciate ligament reconstruction

BackgroundThis study aimed to describe the arthroscopic superlateral capsule pathway technique for spotting femoral fixation device deployment, and to compare the results with normal procedure.MethodsA total of 69 patients underwent ACLR (Anterior Cruciate Ligament Reconstruction) with or without the SCP (superolateral capsule pathway) during procedure were retrospectively selected and evaluated. A total of 36 patients underwent SCP and 33 patients underwent ACLR without SCP. Mean follow-up was 6 months after surgery. All patient noted joint fluid, underwent VAS and Lysholm score at follow-up, and statistical analysis was performed.ResultsNo statistically significant differences were found in patient demographics, ACLR duration time (p = 0.076) and Lysholm score (p = 0.296). Significantly less postoperation pain was reported in the SCP group (p = 0.000), and fluid volume in SCP group was significantly lower (p = 0.001). The postoperative complications were rare in both group.ConclusionsThe superolateral capsule pathway approach is a minimally invasive and safe technique that can be used to accurately locate and implant suture button-based femoral fixation devices in anterior cruciate ligament reconstruction.

Effect of Torsion on the Corrosion Resistance of Nanotubular Anodized Spiral Plates for Femoral Fracture Fixation

The long-term performance of nanotubular anodized spiral plates used for femoral fracture fixation depends on their corrosion resistance in physiological environments. This study investigates the impact of torsion on the corrosion resistance of these implants. Torsion was found to significantly alter the implant's surface properties, affecting its electrochemical behaviour and corrosion resistance. While torsion increased the corrosion potential and electrochemical activity, it compromised the passive oxide layer, leading to reduced corrosion resistance. Electrochemical impedance spectroscopy (EIS) revealed increased solution resistance and decreased polarization resistance post-torsion. These findings provide important insights for designing more durable biomedical implants.

Bilateral femoral neck fractures and fixation failure due to stiff-person syndrome.

We describe a woman with stiff-person syndrome (SPS), whose muscle spasms resulted in sequential bilateral femoral neck fractures. Orthopaedic fixation of the first fracture was complicated by increased muscle spasm, fracture nonunion and ultimately metalwork fracture. SPS was diagnosed following the fracture of the contralateral femoral neck, neurology assessment and detection of high-titre antibodies to glutamic acid decarboxylase. Multidisciplinary management with high-dose benzodiazepines, intravenous immunoglobulin infusions, and bilateral total hip replacements achieved a good functional outcome. Spasms associated with SPS are a rare cause of pathological fractures and may cause orthopaedic fixation to fail. Early recognition and multidisciplinary care are essential to prevent additional morbidity.

Comparison of software-assisted and freehand methods of rotational assessment for diaphyseal femur fractures

ObjectiveAccurate rotational reduction following femoral shaft fracture fixation is absent in up to 28% of cases yet is critical for lower extremity biomechanics. The objective of this cadaveric study was to compare the results of freehand methods of rotational reduction with software-assisted rotational reduction.MethodsFour fellowship-trained orthopedic trauma surgeons attempted rotational correction in a cadaveric model with fluoroscopic assistance using (1) their method of choice (MoC) and (2) software assistance (SA). After correction, deviation from baseline rotation was calculated.ResultsThe mean difference between the two methods (MoC–SA) was 1.1 which was not significant when comparing all raters and between raters individually. SA had significantly less variability compared to MoC. The rate of clinically relevant rotational deformity (> 15°) was 28% using MoC and 11% using SA.ConclusionRotational assessment of diaphyseal femur fractures in this cadaveric model was not significantly different when compared between method of choice and software augmentation.

An overview of patients with intertrochanteric femoral fractures treated with proximal femoral nail fixation using important criteria

BackgroundThis study aimed to assess important criteria, including osteoporosis, fracture type, implant position within the bone, fracture reduction, and radiographic union, in patients with intertrochanteric femoral fractures treated with proximal femoral nail (PFN) fixation and to show their effect on clinical outcomes.MethodsPFN fixation was applied in 73 patients (41 females, 32 males; mean age: 64.5 ± 6.2). The T score, fracture type according to the AO Foundation and Orthopedic Trauma Association (AO/OTA), implant-related complications (IRCs), Harris hip score (HHS), Jensen social function (JSF) score, and Parker-Palmer mobility score (PPMS), postoperative reduction classification, screw position according to the Cleveland zone, Radiographic Union Scale for the Hip (RUSH) score, and tip-apex distance (TAD) were recorded.ResultsMost screws were in central-central (n = 42) and inferior-central (n = 11) positions. IRCs were seen mostly in cases of screws placed in peripheral zones (n = 10) and were not observed in almost any patient with a TAD ≤ 25 mm (n = 52) (p < 0.001). Most of the patients with acceptable or good fracture reduction did not have IRCs (n = 11 and 50, respectively) (p < 0.001). Half of type 3A1 (n = 13) and most type 3A2 (n = 20) fractures showed radiographic union at 3 months, and most type 3A3 (n = 9) fractures showed radiographic union at 5 months (p < 0.05). At 12 months, type 3A2 fractures had the highest HHS (79.2 ± 5.3) and PPMS (3.9 ± 1.5), while type 3A3 fractures had the lowest HHS (70.3 ± 4.6) and PPMS (0.6 ± 2.8) (p < 0.05). At 12 and 24 months, type 3A3 fractures had higher JSF scores (2.8 ± 0.4 and 3.5 ± 0.5, respectively); at 3 months, type 3A1 fractures had higher JSF scores (3.1 ± 0.3) (p < 0.05). The radiographic bone union time was prolonged in patients with a T score ≤ -2.5 standard deviation (SD) (p < 0.05). The HHS and PPMS increased while the RUSH score, considered as the radiographic union, was going towards the 4th month and decreased after the 4th month (p < 0.05).ConclusionsConsidering the criteria (osteoporosis, fracture type, implant position within the bone, fracture reduction, and radiographic union) examined in this study, satisfactory results can be obtained with PFN fixation in the treatment of patients with intertrochanteric femoral fractures.

Robotic-assistance and computer-navigation have similar rates of intraoperative fracture and return to the operating room within 1 year to fluoroscopy-only direct anterior total hip arthroplasty.

The use of technology in direct anterior approach (DAA) total hip arthroplasty (THA) is expanding. Although the use of computer-navigation (CN-THA) and robotics (RA-THA) has previously demonstrated improved component positioning, it is important to understand whether its use is associated with differences in intraoperative complications or early return to the operating room when compared to fluoroscopy-only (manual-THA) DAA THA. 3433 DAA THAs (226 RA-THA, 1007 CN-THA, 2200 manual-THA) performed at a single institution were retrospectively reviewed. Cohorts were adjusted for age, sex, BMI, femoral fixation, history of spine fusion, and Charlson Co-morbidity Index (CCI) using Inverse Probability of Treatment Weight (IPTW). Operative times were identified. Intraoperative fractures and re-operations within 1 year were identified via chart review. There were no statistically significant differences in intraoperative fracture among the cohorts (0.4% RA-THA, 0.4% CN-THA, 0.4% manual-THA; p > 0.529). There were also no statistically significant differences (p > 0.589) among the cohorts in rates of return to the operating room within 1 year for postoperative fracture (0.0% RA-THA, 0.4% CN-THA, 0.4% manual-THA), dislocation (0.0% RA-THA, 0.0% CN-THA, 0.1% manual-THA), infection (0.4% RA-THA, 0.7% CN-THA, 0.5% manual-THA), or other aetiologies (0.0% RA-THA, 0.2% CN-THA, 0.1% manual-THA). This study did not find a statistically significant difference in intraoperative fracture or re-operations within 1 year between DAA THA performed with RA, CN, or manual techniques. The introduction of technology to THA is not associated with increase in reoperations within one-year.

Retraction: A comparative study of functional and radiological outcome on aperture versus suspensory femoral fixation in Arthroscopic ACL reconstruction

Retraction: A comparative study of functional and radiological outcome on aperture versus suspensory femoral fixation in Arthroscopic ACL reconstruction

Using an Intraoperative Stress Examination to Direct Treatment in Posterior Femoral Head Fracture-Dislocations.

To examine the results of a treatment algorithm incorporating an examination under anesthesia (EUA) performed intraoperatively after fixation of the femoral head through a Smith-Petersen approach to determine the need for posterior wall or capsule repair. Retrospective review. Two Level 1 trauma centers. All acute, traumatic femoral head fractures from posterior hip dislocations treated at participating centers over a 5-year period from 2017 to 2022. Injuries were classified according to the Pipkin system. The primary outcome was the result of intraoperative EUA performed after femoral head fixation to determine the need for Kocher-Langenbeck exposure for posterior wall and/or capsule fixation. The secondary outcomes included rates of avascular necrosis, heterotopic bone formation, late instability, and conversion to total hip arthroplasty (THA). In total, 63 men and 22 women with a mean age of 32.5 (range 18-71) years were studied. Seventy-nine of 85 (92.9%) patients had a stable EUA after fixation of the femoral head through a Smith-Petersen approach. Six (6/85, 7.1%) underwent an additional Kocher-Langenbeck approach for posterior wall or capsule fixation. This included 1 Pipkin I, 1 Pipkin II, and 4 Pipkin IV injuries. Of the Pipkin IV injuries, 51/55 (92.7%) had stable EUA and did not require fixation of their posterior wall. This included seven patients with wall involvement >20%. Five patients were excluded because of planned fixation of their posterior wall based on preoperative imaging. Of patients with at least 6 months follow-up, 16 of 65 (26.4%) developed radiographic evidence of avascular necrosis and 21 of 65 (32.3%) evidence of heterotopic bone formation. Seven out of 65 (10.8%) were converted to THA over the study period. When comparing patients with a single exposure and those with additional KL exposure, it was found that they did not vary in their rate of avascular necrosis (27.1% vs. 0.0%, P = 0.3228), heterotopic ossification formation (30.5% vs. 50.0%, P = 0.3788), or conversion to THA (10.2% vs. 16.7%, P = 0.510). This study found residual posterior hip instability after femoral head fixation in patients with and without posterior wall fractures after posterior dislocations. The results of this study support the use of an EUA after femoral head fixation to identify residual posterior hip instability in all femoral head fractures from posterior hip dislocations, regardless of Pipkin type. Use of the Smith-Petersen exposure remains a viable surgical option and may be improved with the incorporation of an EUA after femoral head fixation. For Pipkin IV injuries with posterior wall fractures with indeterminate stability, an EUA accurately identifies residual instability. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Anatomic Posterolateral Corner Reconstruction of the Knee Using Single Semitendinosus Autograft: Technical Note for the Borderline-length Graft.

The original LaPrade technique for anatomic reconstruction of the posterolateral corner of the knee uses two separate allografts. More recently, a modification of this technique, using an adjustable-length suspension device with a cortical button for tibial fixation, allows anatomic reconstruction with a single semitendinosus autograft. This modification is of utmost relevance when sources of allograft are not available for multiligament knee reconstruction. In both techniques interference screws are used for femoral fixation of the fibular collateral ligament and popliteus tendon. The minimum length recommended for the anatomic reconstruction with single semitendinosus is 25 cm, but anatomic variations in the population exist, and a longer semitendinosus may be necessary. Indeed, some patients may only reach the necessary length considering the thinnest limb of the semitendinosus. In these patients, femoral fixation of the thinnest limb with a knotless suture anchor, as we describe, for the popliteus tendon limb, allows expansion of this technique to borderline semitendinosus autografts while reducing the risk of tunnel coalition. We also describe a different sequence of steps: fixation of the fibular collateral ligament in the femoral tunnel followed by its tensioning and fixation in the fibular head tunnel, fixation of the popliteus tendon in its femoral footprint with a knotless suture anchor and, finally, tensioning of the popliteofibular ligament and popliteus tendon. This different sequence also helps avoiding tendon waste, which may be left over, allowing more graft incorporation into the tibial tunnel.

Inferior short-term survivorship and patient outcomes for cementless compared to hybrid fixation with a cemented femoral implant in a novel blade-anchored medial unicompartmental knee arthroplasty design: An analysis of 132 cases

PurposeFor younger, more active patients, a cementless unicompartmental knee arthroplasty (UKA) might be more advantageous than cemented fixation. Therefore, this study aimed to compare implant survivorship and patient-reported outcome measures (PROMs) between cementless and hybrid fixation (cemented femur and cementless tibial fixation) in a novel tibial blade-anchored, medial UKA design. MethodsTwo surgeon’s registries were reviewed for patients who underwent primary cementless or hybrid medial UKA for medial osteoarthritis between 2019 and 2022. Patients were included if implant survivorship and one-year postoperative PROMs (UCLA-activity score, Oxford Knee Score (OKS), Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS-JR), pain (VAS) and satisfaction) were registered. Variables were compared using independent two-sample t-tests or the Chi-square test. Survival rates were determined using the Kaplan-Meier models and compared using the Log-rank test. ResultsA total of 132 knees were included (cementless 58.3%; cemented 41.7%; mean follow-up 3.1 ± 0.6 years). Three-year all-cause revision survival rate was significantly superior for the hybrid fixation (hybrid: 100%; cementless 88.5%[84.7%–92.3%], p = 0.026). However, the difference in three-year conversion rate to total knee arthroplasty (TKA) did not reach statistical significance. The one-year postoperative OKS (hybrid: 42.9 ± 4.8; cementless: 39.8 ± 6.4, p = 0.003) and KOOS-JR (hybrid:81.5 ± 13.7; cementless: 74.4 ± 12.1, p = 0.002) were significantly superior for the hybrid fixation. Three-year conversion rate to TKA and two-year postoperative PROMs did not significantly differ. ConclusionThe cementless medial UKA demonstrated a significantly inferior short-term all-cause survival rate and inferior postoperative one-year OKS and KOOS-JR compared to the hybrid medial UKA design with a cemented femoral component.

Salvage Total Hip Replacement for Failed Proximal Femoral Fracture Fixation.

Salvage arthroplasty for failed proximal femoral fracture fixation is a complex procedure. This involves the removal of the primary failed or broken implant followed by a hip joint replacement procedure. The complications and technical difficulties associated with these surgeries are often difficult to anticipate. Initially, to further understand the position in the literature with regardto salvage arthroplasty, we completed an informative scoping review. Search terms were selected, and databases Embase and PubMed were utilised to form a literature search. Relevant articles were selected by two independent researchers, with a final list of nine studies reviewed and tabulated for themes to be identified and analysed. Subsequently, we retrospectively studied the notes of all the patients who underwent complex conversion arthroplasty in the same district hospitals in a span of 16 years (August 2002 to August 2018) and presented the results. Seventy-one patients underwent complex salvage arthroplasty following a failed fixation of proximal femoral fracture under the care of three different surgeons. All surgeries were carried out by the posterior approach. The demographics, intraoperative events, and postoperative follow-up have been presented through clinical and radiological assessments. With a mean age being 73.6, female patients were almost twice the number of male patients. The left hip was the more common surgical site. Implant cutout was the most common cause of failure of the primary implant. Most of these surgeries were either uncemented (31 cases, 43.66%) or hybrid (29 cases, 40.84%). The most common acetabular size to be used was 50 mm, and the most common head size used was 32 mm. A majority of the surgeries were metal on poly bearings (64 cases, 90.14%). The mean surgical time, including anesthetic,was four hours and 13 minutes. A total of 31 (44%)patients needed blood transfusion postoperatively. The infection rate was 21.13% (15 cases), being the most common surgical complication. The mean follow-up of the patients was 27.2months with the maximum follow-up being 125 months. The one-year mortality was found to be 14% (10 cases). The mean limb length discrepancy was shortening by an average of 3.84 mm. A total of 66.2% (47 cases) of patientswere shortened postoperatively. The average cup abduction and anteversion angles were 35° and 24.25°, respectively. The average position of the femoral stem was 0.31° in the varus with 40.85% (29 cases) of patients having a slightly varus stem. Upon drawing comparisons with primary hip arthroplasty for primary osteoarthritis through data available in the literature, it is obvious that salvage arthroplasty is a complex procedure with longer surgical times and onerous rehabilitation. Whilst it is not the same as revision arthroplasty, many of the characteristics in terms of surgical planning and outcomes are similar. Therefore, it is our recommendation that salvage hip arthroplasty procedures should be categorised, listed, and studied separately from primary arthroplasty in the National Joint Registry database.

MPFL reconstruction with quadriceps tendon autograft in open physis

Despite open growth plates, reconstruction of the medial patellofemoral ligament (MPFL) is recommended for the treatment of patellar dislocation in children and adolescents. However, the open physis on the medial distal femur requires a tailored surgical approach with an essential knowledge of the anatomical relationship of the femoral MPFL insertion to the physis. This video illustrates the technique of MPFL reconstruction using an autologous pedicled quadriceps tendon graft with femoral drill channel fixation distal to the epiphyseal growth plate.

Comparing the performance of a femoral shaft fracture fixation using implants with biodegradable and non-biodegradable materials.

Orthopedic injuries, such as femur shaft fractures, often require surgical intervention to promote healing and functional recovery. Metal plate implants are widely used due to their mechanical strength and biocompatibility. Biodegradable metal plate implants, including those made from magnesium, zinc, and iron alloys, offer distinct advantages over non-biodegradable materials like stainless steel, titanium, and cobalt alloys. Biodegradable implants gradually replace native bone tissue, reducing the need for additional surgeries and improving patient recovery. However, non-biodegradable implants remain popular due to their stability, corrosion resistance, and biocompatibility. This study focuses on designing an implant plate for treating transverse femoral shaft fractures during the walking cycle. The primary objective is to conduct a comprehensive finite element analysis (FEA) of a fractured femur's stabilization using various biodegradable and non-biodegradable materials. The study assesses the efficacy of different implant materials, discusses implant design, and identifies the optimal materials for femoral stabilization. Results indicate that magnesium alloy is superior among biodegradable materials, while titanium alloy is preferred among non-biodegradable options. The findings suggest that magnesium alloy is the recommended material for bone implants due to its advantages over non-degradable alternatives.

Diphallia with associated congenital malformations

BACKGROUND: Diphallia is an extremely rare congenital pathology in which children are born with a double penis. Diphallia is usually accompanied by systemic abnormalities, and their degree varies from no associated abnormalities to multiple abnormalities, including genitourinary, gastrointestinal, and musculoskeletal ones. Mortality among infants born with diphallia is higher due to infectious diseases accompanying developmental anomalies. CLINICAL CASE DESCRIPTION: The presented case is an example of diphallia with associated developmental malformations and the staged surgical treatment which resulted in good outcomes. DISCUSSION: Diphallia is treated surgically, but in each case, it is necessary to take into account the concomitant pathology. The main cause of death in children with diphallia are concomitant severe developmental defects, so the treatment is carried out in stages. In this case, because of the anorectal defect, intestinal obstruction was eliminated first by forming a sigmoid colostomy. Subsequently, after the child’s condition improved and he developed further, a staged surgical treatment was performed: removal of a lipoma in the cauda equina, simultaneous surgery (removal of the penis, elimination of the rectovesical fistula, lowering the rectum and forming the anus, elimination of vesicoureteral reflux, plastic surgery of the anterior abdominal wall), osteotomy with reduction of the right femur head and fixation with an L-shaped plate. The next stage of surgical treatment is the correction of the curvature of the spine and pelvic bones. CONCLUSION: In case of diphallia associated with other pathologies of organs and systems, especially of anorectal malformations, the initial formation of a double-barreled sigmostostomy helps to stabilize the child’s condition and to postpone radical surgery to the time more convenient for the patient and the doctor.

Evaluating the Impact of Adjustable- and Fixed-Loop Femoral Endobuttons on Intraoperative Surgeon Satisfaction and Postoperative Patient Functional Outcomes in Anterior Cruciate Ligament (ACL) Reconstruction.

This study aims to evaluate the effects of adjustable- and fixed-loop femoral endobuttons on intraoperative surgeon satisfaction and postoperative patient functional outcomes in anterior cruciate ligament (ACL) reconstruction. The use of cortical suspensory devices, either fixed-loop or adjustable-loop, is common in ACL reconstruction surgeries for femoral tunnel fixation. Fixed-loop devices, although effective, often require additional tunnel drilling, potentially leading to tunnel widening. Adjustable-loop devices were introduced to mitigate this issue. However, there are concerns regarding the mechanical performance of adjustable loops, particularly under cyclical loading, which could affect long-term graft stability. This retrospective comparative study compares functional outcomes and intraoperative assessments of 140 patients who underwent ACL reconstruction between 2017 and 2021 with fixed-loop and adjustable-loop devices for the femoral side. Patients were evaluated at six weeks, six months, one year, and two years postoperatively using the Lysholm score, International Knee Document Committee score, Tegner activity scores, and knee stability tests, including Lachman and anterior drawer tests. Additionally, the study captured surgeon satisfaction intraoperatively and compared it with the final functional outcome. Both groups demonstrated significant improvements in knee stability, range of motion (ROM), and functional scores over time. At six weeks, the anterior drawer test showed 61 stable knees out of 70 in the adjustable-loop group and 57of 70 in the fixed-loop group, with stability maintained in 56 and 49 knees, respectively, at the final follow-up. The mean extension at two years was 0.5° ± 3.8° in the fixed-loop group and -1.3° ± 3.2° in the adjustable-loop group (p = 0.02). Although the adjustable-loop group showed trends toward better early knee stability and extension, these differences were not statistically significant at two years (p > 0.05). Surgeons' intraoperative satisfaction with graft firmness was higher in the adjustable-loop group. However, this did not correlate with long-term functional outcomes, as both groups had comparable scores at the final follow-up. Further research with larger sample sizes and extended follow-up periods is needed to confirm these findings. The limitations of this study include its retrospective design, the potential for selection bias, and the subjective nature of intraoperative assessments.

Comparison of dynamic hip screw with anti-rotation screw and femoral neck system internal fixation for the treatment of garden II-IV type femoral neck fractures.

Femoral neck fractures, which are fractures occurring from the femoral head to the base of the femoral neck, are prevalent in the elderly population. With the progression of societal aging, the incidence of femoral neck fractures has been steadily increasing, making it a significant global issue that urgently needs to be addressed. To compare the efficacy and safety of dynamic hip screw (DHS) with anti-rotation screw and femoral neck system (FNS) internal fixation for the treatment of Garden II-IV type femoral neck fractures. A total of 90 patients with Garden II-IV type femoral neck fractures were randomly assigned to either the control group (n= 45) treated with DHS and anti-rotation screw or the experimental group (n= 45) treated with FNS. Surgical outcomes, including incision size, blood loss, operation time, fluoroscopy frequency, and fracture healing time, were compared. Postoperative complication rates, reoperation rates, Harris scores, and visual analogue scale (VAS) scores were also assessed. The experimental group demonstrated significantly reduced incision length, blood loss, operation time, and fluoroscopy frequency compared to the control group (P< 0.01). No significant differences were observed in fracture healing time, Garden classification, or fracture reduction outcomes between the two groups (P> 0.05). At 6 months post-treatment, both groups showed significant improvements in Harris scores and VAS scores compared to pre-treatment (P< 0.05), with no significant differences between the groups (P> 0.05). The rates of internal fixation failure, nonunion, and avascular necrosis of the femoral head, as well as overall incidence of postoperative complications and reoperation rates, showed no significant differences between the two groups (P> 0.05). Both DHS with anti-rotation screw and FNS internal fixation demonstrated comparable efficacy and safety profiles in the treatment of Garden II-IV type femoral neck fractures. The experimental group showed advantages in terms of reduced incision length, blood loss, operation time, and fluoroscopy frequency, while maintaining similar clinical outcomes and complication rates.