Analysis of the Accuracy of CAM-type Deformity Resection on a Low-cost Arthroscopic Simulator in a Training Scenario.

Objective To evaluate surgeons' performance in resecting CAM-type deformities using a realistic arthroscopic surgery simulator. Methods An arthroscopic simulator was created using low-cost materials with the help of a GTMax Core A1 3D printer and the programs Invesalius and Meshmixer 2017, which were used to develop femoral head parts in ABS material, with the presence of a CAM-type deformity, to mimic a femoroacetabular impact situation. After the operations were performed by 16 surgeons, the femurs were compared to a previous model with deformity and another without, using Cloudcompare, and parameters such as the volumetric difference between the operated femurs, with and without deformity, the minimum and maximum distance between them, the percentage of the deformity resected, the estimated time for total resection of the deformity, as well as a qualitative analysis based on the images and graphs provided by the program representing the areas of the parts resected, were evaluated at the end. Results The average resection speed was 34.66 mm 3 /min (SD = 46 mm 3 /min, max = 147.33; min = -2.66). The average resection rate was 26.2% (SD = 34.7%, max = 111; min = -2). Qualitative analysis showed hyporesection of deformities and sometimes hyperresection of nondeformed areas. The simulator was highly rated by the surgeons, with a tactile sensation very similar to real surgery, according to them. Conclusion Arthroscopic simulators have proved very useful in training less experienced surgeons.

Capsule closure has better hip function than non-closure in hip arthroscopy for femoracetabular impingement: A systematic review and meta-analysis.

Background: The impact of capsular closure vs non-closure in hip arthroscopy for femoracetabular impingement (FAI) was assessed by a meta-analysis. Methods: With the most recent search update occurring in August 2022, relevant studies were found by searching the Pubmed and EMBASE databases. A collection of studies was made that conducted hip arthroscopy for FAI. Review Manager 5.3 was used to carry out the meta-analysis. The dichotomous and continuous factors were compared using the odds ratios (OR) and mean differences (MD). A fixed-effect or random-effect model was chosen, depending on the degree of heterogeneity (I2). Forest plots were used to assess the results. A significance level of P < 0.05 was applied to the statistical analysis. Results: Ultimately, 15 studies were incorporated into the meta-analysis. The surgery time was longer for the capsular closure group (CC group) compared to the non-closure (NC group) group. (P < 0.001, SMD = 8.59, 95%CI [7.40, 9.77], I2 = 32 %). Following hip arthroscopy, the CC group's mHHS was superior to that of the NC group (P = 0.001, MD = 2.05, 95%CI [0.83, 3.27], I2 = 42 %), HOS-ADL (P < 0.001, MD = 4.29, 95%CI [3.08, 5.50], I2 = 0 %). The capsular closure group had a reduced rate of postoperative complications (P = 0.001, OR = 0.21, 95%CI [0.08, 0.54], I2 = 0 %) and conversion to THA (P = 0.01, OR = 0.42, 95%CI [0.21, 0.83], I2 = 0 %) following hip arthroscopy than the non-closure group. The revision rate, VAS, and postoperative HOS-SSS did not significantly differ between these two groups (P＞0.05). Conclusion: The current meta-analysis found that the closed group had a lower complication rate and considerably greater mHHS and HOS-ADL following surgery compared to the non-closed capsule group. Whether this is related to the continuous progress of biomechanical and clinical research techniques deserves our attention. Level of evidence: Level IV, systematic review of Level I through Level III studies.

Relationship between Femoroacetabular Impingement and Pubalgia in Professional Soccer Players.

Objective To analyze the relationship between pubalgia and femoroacetabular impingement (FAI) in professional athletes of a soccer club, defining the prevalence of these conditions in the sample studied. Methods It is an epidemiological, cross-sectional, and analytical study including 90 professional soccer players active from 2019 to 2021. We accessed the medical records of the subjects to retrieve information from the modified Pre-Competition Medical Assessment (PCMA) protocol, orthopedic physical examination, and anteroposterior pelvic radiographs to assess pubalgia and FAI, respectively. Inclusion criteria were athletes playing in the professional soccer club in the 2019 to 2021 season, who underwent a modified PCMA upon admission, and who signed an informed consent form. Results FAI was highly prevalent (85.6%) in the sample. This prevalence may occur because, in Brazil, people start playing sports early, not always in suitable fields, or with no proper equipment and supervision. In addition, the CAM-type impingement was the most frequent (62.2%). These injuries are related to high-intensity movements, including those associated with soccer. Furthermore, there is no dependency correlation between pubalgia and FAI. FAI was present in only 20% of athletes with pubalgia complaints. Conclusion There was a high prevalence of FAI in professional soccer players in the studied population (85.6%) but with no relationship between FAI and pubalgia.

Parafoveal chondral lesion of the femoral head in patients with femoroacetabular impingement.

Objective: To describe cases of parafoveal chondral lesion of the femoral head in patients with femoroacetabular impingement, correlating the clinical and imaging data. Materials and Methods: This was a retrospective descriptive case series of parafoveal chondral lesion of the femoral head in 21 patients who underwent computed tomography and magnetic resonance arthrography scans of the hip, having then received an imaging-based diagnosis of femoroacetabular impingement. Results: Of the 21 patients evaluated, 15 (71%) had cam-type femoroacetabular impingement, whereas five (24%) had mixed-type impingement, and one (5%) had pincer-type impingement. Twelve patients (57%) had a low frequency of physical activity, which was significantly associated with the presence of cam-type impingement (p = 0.015). Although the extent of the lesion correlated significantly with the acetabular coverage angle (p = 0.04), it did not correlate significantly with the alpha angle or femoral head-neck offset value (p = 0.08 and p = 0.06, respectively). We also found no correlation between the extent of the lesion and the other main parameters that define the femoroacetabular impingement types. Conclusion: This was one of the largest case series of parafoveal chondral lesion of the femoral head in patients with imaging findings of femoroacetabular impingement. The extent of such lesions does not appear to correlate with the parameters of femoroacetabular impingement, with the exception of the acetabular coverage angle.

Objetivo: Descrever casos de lesão condral parafoveal da cabeça femoral em pacientes com impacto femoroacetabular, correlacionando dados clínicos e de imagem. Materiais e Métodos: Esta foi uma série de casos descritiva retrospectiva de lesão condral parafoveal da cabeça femoral em 21 pacientes submetidos a tomografia computadorizada e artrorressonância magnética do quadril e que receberam diagnóstico por imagem de impacto femoroacetabular. Resultados: Dos 21 pacientes avaliados, 15 (71%) tiveram impacto femoroacetabular do tipo cam, enquanto cinco (24%) tiveram impacto do tipo misto e um (5%) teve impacto do tipo pincer. Doze pacientes (57%) apresentaram baixa frequência de atividade física, sendo esta significativamente associada a impacto do tipo cam (p = 0,015). Houve correlação significativa entre a extensão da lesão e o ângulo de cobertura acetabular (p = 0,04), porém, não se correlacionou significativamente com o ângulo alfa ou com o valor do deslocamento cabeça-colo femoral (p = 0,08 e p = 0,06, respectivamente). Também não encontramos correlação entre a extensão da lesão e os outros principais parâmetros que definem os tipos de impacto femoroacetabular. Conclusão: Esta foi uma das maiores casuísticas de lesão condral parafoveal da cabeça femoral em pacientes com achados de imagem de impacto femoroacetabular. A extensão dessas lesões não parece se correlacionar com os parâmetros do impacto femoroacetabular, com exceção do ângulo de cobertura acetabular.

Demographic and Clinical Correlates of Device-Measured Physical Activity Levels in Individuals with Femoroacetabular Impingement Syndrome.

Objective: To compare physical activity (PA) levels between individuals with femoroacetabular impingement syndrome (FAIS) and uninjured controls and determine correlates of moderate to vigorous physical activity (MVPA). Design: Cross-sectional, comparative study. Setting: University laboratory. Participants: A total number of 25 individuals with FAIS (15 female; age, 31.0±9.2 years; symptom duration, 4.7±7.1 years) and 14 uninjured controls (9 female; age, 28.0±9.1 years) (N=39). Interventions: Not applicable. Main Outcome Measures: All individuals wore an accelerometer around the waist during waking hours for 7 days. We compared demographic, clinical data, and PA levels between groups using independent samples t tests and compared the proportions of those meeting the PA guideline cutoff (150min/wk) using a chi-square test. Additionally, we examined correlates of mean daily MVPA using linear regression in both groups. Results: Individuals with FAIS spent less time in MVPA (controls, 52.1±25.6min/d; FAIS, 26.9±19.1min/d; P=.001) and took fewer steps (controls, 8428±2931 steps/d; FAIS, 6449±2527 steps/d; P=.033) than uninjured controls. A lower proportion of individuals with FAIS met the PA cutoff (40.0%) compared with uninjured controls (78.6%; P=.020). Higher body mass index (BMI) values and lower (worse) Hip Disability and Osteoarthritis Outcome Score (HOOS)-Quality of Life subscale scores were associated with lower mean daily MVPA in those with FAIS (R 2=21.2%, P=.021; R 2=22.0%, P=.018; respectively) but not in uninjured controls. Conclusions: Individuals with FAIS spent less time in daily MVPA, took fewer daily steps, and met recommended PA guideline cutoffs at lower proportions compared with uninjured controls. Higher BMI and lower HOOS-Quality of Life scores were associated with lower mean daily MVPA. Interventions should be developed for individuals with FAIS to increase PA engagement to potentially lessen the risk of future comorbidities associated with decreased PA and increased BMI.

[Preoperative MR imaging for hip dysplasia : Assessment of associated deformities and intraarticular pathologies]. / Präoperative MRT-Bildgebung bei Hüftdysplasie : Abklärung assoziierter Deformitäten und intraartikulärer Pathologien.

BACKGROUND: Developmental dysplasia of the hip (DDH) is a known reason for hip pain for adolescents and young adults. Preoperative imaging is increasingly recognized as an important factor due to the recent advances in MR imaging. OBJECTIVES: The aim of this article is to give an overview of preoperative imaging for DDH. The acetabular version and morphology, associated femoral deformities (cam deformity, valgus and femoral antetorsion) and intraarticular pathologies (labrum and cartilage damage) and cartilage mapping are described. METHODS: After an initial evaluation with AP radiographs, CT or MRI represent the methods of choice for the preoperative evaluation of the acetabular morphology and cam deformity, and for the measurement of femoral torsion. Different measurement techniques and normal values should be considered, especially for patients with increased femoral antetorsion because this could lead to misinterpretation and misdiagnosis. MRI allows analysis of labrum hypertrophy and subtle signs for hip instability. 3D MRI for cartilage mapping allows quantification of biochemical cartilage degeneration and yields great potential for surgical decision-making. 3D-CT and, increasingly, 3D MRI of the hip to generate 3D pelvic bone models and subsequent 3D impingement simulation can help to detect posterior extraarticular ischiofemoral impingement. RESULTS AND DISCUSSION: Acetabular morphology can be divided in anterior, lateral and posterior hip dysplasia. Combined osseous deformities are common, such as hip dysplasia combined with cam deformity (86%). Valgus deformities were reported in 44%. Combined hip dysplasia and increased femoral antetorsion can occur in 52%. Posterior extraarticular ischiofemoral impingement between the lesser trochanter and the ischial tuberosity can occur in patients with increased femoral antetorsion. Typically, labrum damage and hypertrophy, cartilage damage, subchondral cysts can occur in hip dysplasia. Hypertrophy of the muscle iliocapsularis is a sign for hip instability. Acetabular morphology and femoral deformities (cam deformity and femoral anteversion) should be evaluated before surgical therapy for patients with hip dysplasia, considering the different measurement techniques and normal values of femoral antetorsion.

[Definition of hip dysplasia in 2023 : Signs of macro and micro instability]. / Definition der Hüftdysplasie im Jahr 2023 : Zeichen der Makro- und Mikroinstabilität.

BACKGROUND: Hip dysplasia is a complex static-dynamic pathology leading to chronic joint instability and osteoarthritis. Because our understanding of the underlying pathomorphologies of hip dysplasia, both on the macro and micro levels, has evolved, an updated definition is needed. QUESTION: What is the definition of hip dysplasia in 2023? METHODS: By summarizing and reviewing relevant literature, we provide an up-to-date definition of hip dysplasia with a guide to appropriately making the diagnosis. RESULTS: In addition to the pathognomonic parameters, supportive and descriptive indicators, as well as secondary changes are used to fully characterize instability inherent in hip dysplasia. The primary diagnostic tool is always the plain anteroposterior pelvis radiograph, which can be supplemented by additional investigations (MRI of the hip with intraarticular contrast agent; CT) if necessary. CONCLUSION: The complexity, subtlety, and diversity of the pathomorphology of residual hip dysplasia requires careful, multilevel diagnosis and treatment planning in specialized centers.

Femoroacetabular impingement in ancient Nubia 1400-656 BC.

INTRODUCTION: There is significant recent interest in femoroacetabular impingement (FAI) in orthopaedics. The etiology of the cam deformity is unknown but has been hypothesized to be due to stresses from sporting activities in our modern society. Few archeological studies exist of femora and FAI. This study reviewed proximal femoral anatomy in a skeletal collection from the ancient Nile valley archeological site at Tombos 1400-656 BC. METHODS: Digital photographs of the femora were used to obtain angular measurements of the apparent neck shaft, true neck shaft, version, inclination, and α and ß angles of Nötzli. All photographs were reviewed by two orthopaedic surgeons for cam and pincer lesions. Sex and age of the specimens was determined when possible. A cam lesion was defined as any femur demonstrating an α angle > 50° or when a cam deformity was seen on visual inspection by both orthopaedic surgeons. Pincer lesions were identified upon visual inspection by both orthopaedic surgeons, when the femoral neck demonstrated impaction lesions, as pelvis radiographs could not be obtained. RESULTS: There were 126 unique femora; 69 female and 57 male. Age estimates were possible in 100 and was 15-24 years in 14, 25-34 years in 33, 35-49 years in 28, 50-69 years in 17, and ≥ 70 years in 8. There were nine femora (seven individuals) with cam lesions (7%) and five femora (four individuals) with pincer lesions (4%). One demonstrated a combined lesion. CONCLUSION: FAI existed in ancient Nile valley inhabitants and is thus not only a product of modern day life style athletics. This contrasts with Native Americans living in Ohio 700-1000 AD where no FAI was identified. This difference is likely due to combinations of different types of activity, diet, and genetics. Further research of ancient populations is needed to further answer this question. LEVEL OF EVIDENCE: IV-cohort study.

Parafoveal chondral lesion of the femoral head in patients with femoroacetabular impingement / Lesão condral parafoveal da cabeça femoral em pacientes com impacto femoroacetabular

Abstract Objective: To describe cases of parafoveal chondral lesion of the femoral head in patients with femoroacetabular impingement, correlating the clinical and imaging data. Materials and Methods: This was a retrospective descriptive case series of parafoveal chondral lesion of the femoral head in 21 patients who underwent computed tomography and magnetic resonance arthrography scans of the hip, having then received an imaging-based diagnosis of femoroacetabular impingement. Results: Of the 21 patients evaluated, 15 (71%) had cam-type femoroacetabular impingement, whereas five (24%) had mixed-type impingement, and one (5%) had pincer-type impingement. Twelve patients (57%) had a low frequency of physical activity, which was significantly associated with the presence of cam-type impingement (p = 0.015). Although the extent of the lesion correlated significantly with the acetabular coverage angle (p = 0.04), it did not correlate significantly with the alpha angle or femoral head-neck offset value (p = 0.08 and p = 0.06, respectively). We also found no correlation between the extent of the lesion and the other main parameters that define the femoroacetabular impingement types. Conclusion: This was one of the largest case series of parafoveal chondral lesion of the femoral head in patients with imaging findings of femoroacetabular impingement. The extent of such lesions does not appear to correlate with the parameters of femoroacetabular impingement, with the exception of the acetabular coverage angle.

Resumo Objetivo: Descrever casos de lesão condral parafoveal da cabeça femoral em pacientes com impacto femoroacetabular, correlacionando dados clínicos e de imagem. Materiais e Métodos: Esta foi uma série de casos descritiva retrospectiva de lesão condral parafoveal da cabeça femoral em 21 pacientes submetidos a tomografia computadorizada e artrorressonância magnética do quadril e que receberam diagnóstico por imagem de impacto femoroacetabular. Resultados: Dos 21 pacientes avaliados, 15 (71%) tiveram impacto femoroacetabular do tipo cam, enquanto cinco (24%) tiveram impacto do tipo misto e um (5%) teve impacto do tipo pincer. Doze pacientes (57%) apresentaram baixa frequência de atividade física, sendo esta significativamente associada a impacto do tipo cam (p = 0,015). Houve correlação significativa entre a extensão da lesão e o ângulo de cobertura acetabular (p = 0,04), porém, não se correlacionou significativamente com o ângulo alfa ou com o valor do deslocamento cabeça-colo femoral (p = 0,08 e p = 0,06, respectivamente). Também não encontramos correlação entre a extensão da lesão e os outros principais parâmetros que definem os tipos de impacto femoroacetabular. Conclusão: Esta foi uma das maiores casuísticas de lesão condral parafoveal da cabeça femoral em pacientes com achados de imagem de impacto femoroacetabular. A extensão dessas lesões não parece se correlacionar com os parâmetros do impacto femoroacetabular, com exceção do ângulo de cobertura acetabular.

DISTAL FEMORAL FRACTURES FROM HIGH-ENERGY TRAUMA: A RETROSPECTIVE REVIEW OF COMPLICATION RATE AND RISK FACTORS.

Objective: Determine complications' incidence and risk factors in high-energy distal femur fractures fixed with a lateral locked plate. Methods: Forty-seven patients were included; 87.2% were male, and the average age was 38.9. The main radiographic parameters collected were distal lateral femoral angle (DFA), distal posterior femoral angle (DPLF), comminution length, plate length, screw working length, bone loss, and medial contact after reduction and plate-bone contact, location of callus formation, and implant failure. The complications recorded were nonunion, implant failure, and infection. Results: Complex C2 and C3 fractures accounted for 85.1% of cases. Open fractures accounted for 63.8% of cases. The mean AFDL and AFDP were 79.8 4.0 and 79.3 6.0, respectively. The average total proximal and distal working lengths were 133.3 42.7, 60.4 33.4, and 29.5 21.8 mm, respectively. The infection rate was 29.8%, and the only risk factor was open fracture (p = 0.005). The nonunion rate was 19.1%, with longer working length (p = 0.035) and higher PDFA (p = 0.001) as risk factors. The site of callus formation also influenced pseudoarthrosis (p = 0.034). Conclusion: High-energy distal femoral fractures have a higher incidence of pseudoarthrosis and infection. Nonunion has greater working length, greater AFDL, and absence of callus formation on the medial and posterior sides as risk factors. The risk factor for infection was an open fracture. Level of Evidence III; Retrospective Cohort Study .

Objetivos: Determinar a incidência e os fatores de risco de complicações nas fraturas de alta energia das fraturas distais do fêmur fixadas com placa bloqueada lateral. Métodos: Foram incluídos 47 pacientes, sendo 87,2% homens e idade média de 38,9 anos. Os principais parâmetros radiográficos coletados foram o ângulo femoral distal lateral (AFDL), ângulo femoral distal posterior (AFDP), comprimento da cominuição, comprimento da placa, comprimento de trabalho dos parafusos, perda óssea, contato medial após a redução e contato placa-osso, localização da formação do calo e falha do implante. As complicações registradas foram não união, falha do implante e infecção. Resultados: Fraturas complexas C2 e C3 representaram 85,1% dos casos. As fraturas expostas corresponderam a 63,8% dos casos. O AFDL e AFDP médios foram 79,8° ± 4,0° e 79,3°± 6,0°, respectivamente. Os comprimentos de trabalho total, proximal e distal médios foram 133,3 ± 42,7, 60,4 ± 33,4 e 29,5 ± 21,8 mm, respectivamente. A taxa de infecção foi de 29,8% e o único fator de risco foi a fratura exposta (p = 0,005). A taxa de não união foi de 19,1%, com maior comprimento de trabalho (p = 0,035) e maior PDFA (p = 0,001) como fatores de risco. O local de formação do calo também influenciou na pseudoartrose (p = 0,034). Conclusões: Fraturas distais do fêmur de alta energia apresentam maior incidência de pseudoartrose e infecção. A não união tem como fatores de risco maior comprimento de trabalho, maior AFDL e ausência de formação de calo nos lados medial e posterior. O fator de risco para infecção foi a fratura exposta. Nível de evidência III; Estudo de Coorte Retrospectivo .

Satisfaction, functional outcomes and predictors in hip arthroscopy: a cohort study.

INTRODUCTION: Hip arthroscopy is not always successful, leading to high rates of total hip arthroplasty (THA) after arthroscopy. The aim of this study was to identify risk factors for THA, revision arthroscopy and low patient satisfaction and to compare outcomes of the different procedures of primary hip arthroscopy. METHODS: A total of 91 primary hip arthroscopy procedures in 90 patients (66% female) were analysed. Data were gathered from patient files and a questionnaire was sent to patients including the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), modified Harris Hip Score (mHHS), the EuroQol 5-dimension and questions about return to sports, satisfaction and pain before and after surgery. Using regression analyses, predictive factors for the outcomes were identified. RESULTS: After a mean of 1.6 years, 4 patients (4%) underwent revision arthroscopy and 10 (11%) a THA. Of the responders (62%), 66% of the patients was satisfied to very satisfied about the surgery. Mean mHHS score was 75.3 (SE 1.9) and the mean WOMAC score was 81.0 (SE 2.8). Return to sports rate was 58%. A higher age was a significant predictor for lower satisfaction (p = 0.008) and a longer duration of symptoms was a significant predictor for worse mHHS outcome scores (p = 0.005). CONCLUSION: A higher age is a predictor for a lower satisfaction and a longer duration of symptoms before surgery has a negative influence on functional outcome. No risk factors for THA or revision arthroscopy were found and there were no significant differences in outcome measurements between the performed surgeries.

Distal femoral fractures from high-energy trauma: a retrospective review of complication rate and risk factors / Fraturas distais do fêmur por trauma de alta energia: uma revisão retrospectiva da taxa de complicações e fatores de risco

ABSTRACT Objective Determine complications' incidence and risk factors in high-energy distal femur fractures fixed with a lateral locked plate. Methods Forty-seven patients were included; 87.2% were male, and the average age was 38.9. The main radiographic parameters collected were distal lateral femoral angle (DFA), distal posterior femoral angle (DPLF), comminution length, plate length, screw working length, bone loss, and medial contact after reduction and plate-bone contact, location of callus formation, and implant failure. The complications recorded were nonunion, implant failure, and infection. Results Complex C2 and C3 fractures accounted for 85.1% of cases. Open fractures accounted for 63.8% of cases. The mean AFDL and AFDP were 79.8 4.0 and 79.3 6.0, respectively. The average total proximal and distal working lengths were 133.3 42.7, 60.4 33.4, and 29.5 21.8 mm, respectively. The infection rate was 29.8%, and the only risk factor was open fracture (p = 0.005). The nonunion rate was 19.1%, with longer working length (p = 0.035) and higher PDFA (p = 0.001) as risk factors. The site of callus formation also influenced pseudoarthrosis (p = 0.034). Conclusion High-energy distal femoral fractures have a higher incidence of pseudoarthrosis and infection. Nonunion has greater working length, greater AFDL, and absence of callus formation on the medial and posterior sides as risk factors. The risk factor for infection was an open fracture. Level of Evidence III; Retrospective Cohort Study.

RESUMO Objetivos Determinar a incidência e os fatores de risco de complicações nas fraturas de alta energia das fraturas distais do fêmur fixadas com placa bloqueada lateral. Métodos Foram incluídos 47 pacientes, sendo 87,2% homens e idade média de 38,9 anos. Os principais parâmetros radiográficos coletados foram o ângulo femoral distal lateral (AFDL), ângulo femoral distal posterior (AFDP), comprimento da cominuição, comprimento da placa, comprimento de trabalho dos parafusos, perda óssea, contato medial após a redução e contato placa-osso, localização da formação do calo e falha do implante. As complicações registradas foram não união, falha do implante e infecção. Resultados Fraturas complexas C2 e C3 representaram 85,1% dos casos. As fraturas expostas corresponderam a 63,8% dos casos. O AFDL e AFDP médios foram 79,8° ± 4,0° e 79,3°± 6,0°, respectivamente. Os comprimentos de trabalho total, proximal e distal médios foram 133,3 ± 42,7, 60,4 ± 33,4 e 29,5 ± 21,8 mm, respectivamente. A taxa de infecção foi de 29,8% e o único fator de risco foi a fratura exposta (p = 0,005). A taxa de não união foi de 19,1%, com maior comprimento de trabalho (p = 0,035) e maior PDFA (p = 0,001) como fatores de risco. O local de formação do calo também influenciou na pseudoartrose (p = 0,034). Conclusões Fraturas distais do fêmur de alta energia apresentam maior incidência de pseudoartrose e infecção. A não união tem como fatores de risco maior comprimento de trabalho, maior AFDL e ausência de formação de calo nos lados medial e posterior. O fator de risco para infecção foi a fratura exposta. Nível de evidência III; Estudo de Coorte Retrospectivo.

Hip Arthroscopy for Femoracetabular Impingement in China: A Review and Meta-Analysis.

OBJECTIVE: To explore the development of hip arthroscopy in China through reviewing the change of the application of hip arthroscopy operation on treating femoracetabular impingement (FAI). METHOD: Papers were retrieved from January 1, 2005 to November 1, 2019, from databases CNKI, Wanfang Data, VIP, PubMed, and Embase. The keywords are Hip Impingement, Femoroacetabular impingement, Hip arthroscopy, Arthroscopic operation, Hip Arthroscopy operation, and Arthroscope, etc. The quality of papers was assessed through MINORS , and statistics and meta-analysis were performed by Word, Excel, and Revman 5.3 Zurich, Switzerland. RESULTS: From a total of 8,953 papers, 46 review articles without data and 48 articles with data were involved, and 25 papers were included in the Meta-analysis. The twenty-five papers were selected from 48 papers with data, of which 41 were reported in Chinese, 11 were missing complete Harris scores, five did not mention the number of patients who had lost follow-up, three had minors quality scores below 7, one did not have enough FAI cases, and three did not have standard deviations in Harris scores. Overall, in China, the application of hip arthroscopy regarding FAI has flourished while maintaining a high level of treatment and has reached its peak in the past 2 years. CONCLUSION: With the rapid development of hip arthroscopy in China, hip operation is widely recognized, many reports on its application on FAI have emerged successively, and the scope of application and technical level have been improved.

The effects of sex and landing task on hip mechanics.

Prevalence of femoroacetabular impingement syndrome is common in cutting sports. A first step to understanding the relationship between cutting sports and the development of femoroacetabular impingement is to investigate hip joint contact forces during such tasks. The purpose of this study was to explore sex and task differences in hip joint contact forces, estimated through musculoskeletal modeling, during single-leg drop landings and land-and-cuts. Kinematics and ground reaction forces were obtained from 38 adults performing drop landings and land-and-cut tasks. Simulations were performed in OpenSim to estimate lower extremity muscle forces and hip joint contact forces. Statistical parametric mapping was used to compare hip joint force waveforms between sex and task. There were no sex differences in hip joint forces, but landing trials were characterized by increased hip joint forces compared to land-and-cut trials. The hip joint force estimates obtained the current study could be used in future finite element models that incorporate bone growth models to understand the development of femoroacetabular impingement and design possible compensatory exercises.

Longitudinal Capsulotomy in Hip Arthroscopy: A Safe and Feasible Procedure for Cam-Type Femoracetabular Impingement.

OBJECTIVE: To evaluate the surgical security, feasibility, and clinical efficacy of the longitudinal outside-in capsulotomy in hip arthroscopic treatment for cam-type femoracetabular impingement (FAI). METHODS: We retrospectively reviewed patients with cam-type FAI who underwent hip arthroscopy in our institute from January 2018 to June 2019. All hip arthroscopic procedures were performed by one experienced surgeon in the same manner, except the fashions of capsulotomy. Fifty six patients with mean age of 39.1 and mean body mass index (BMI) of 24.5 were categorized into two groups according to the fashions of capsulotomy. Twenty six cases with longitudinal outside-in capsulotomy were categorized into Group L, and 30 cases with transversal interportal capsulotomy were categorized into Group T as the control group. The demographic parameters were retrieved from medical documents and compared between the two groups. Surgical outcome including overall surgical time, traction time, complications, visual analogue score (VAS), and intraoperative radiation exposure were compared to investigate the security and feasibility. Radiographic assessment, and functional outcome were compared between the two groups to determine the clinical efficacy of the longitudinal capsulotomy. RESULTS: There was no significant difference in the demography and duration of follow-up between the two groups. The overall surgical time demonstrated no significant difference between Group L and Group T (130.8 ± 16.6 min and 134.0 ± 14.7 min, P = 0.490). Significantly decreased traction time was found in Group L (43.2 ± 8.4 min and 62.2 ± 8.6 min, P < 0.001) compared to Group T. The Median of the fluoroscopic shot was 1 and 3 (P < 0.001). No major complications and reoperation were reported in both groups. The case of intraoperative iatrogenic injure was 0 (0%) and 6 (20%) in Group L and Group T respectively (P = 0.035), and the case of postoperative neurapraxia was 0 (0%) and 8 (26.6%) in Group L and Group T respectively (P = 0.017). The Median of postoperative VAS was 2 and 3 in Group L Group T (P = 0.002). The postoperative α angle was 42.3° ± 3.4° and 44.4° ± 3.5° in group L and group T respectively (P = 0.001). The postoperative iHOT-12 score at final follow-up was 79.3 ± 6.7 and 77.0 ± 7.9 respectively (P = 0.141). CONCLUSION: Longitudinal outside-in capsulotomy with less radiation exposure, reduced traction time, and reduced complications could be a safe and feasible procedure in arthroscopic treatment for cam FAI. Its clinical efficacy was not worse compared with traditional interportal capsulotomy in short-term follow-up.

Epidemiology of hip pain in brazilian bodybuilders / Epidemiologia da dor no quadril em fisiculturistas brasileiros

ABSTRACT Objective: To determine the frequency of hip pain in competitive bodybuilders over three different bodybuilding competitions. Methods: This study evaluated bodybuilders recruited from three competitions during the year of 2016. All participants provided their informed consent and the study received IRB approval. Training routine, health condition, level of success on competitions, history of hip pain and physical examination of the hip were evaluated. Results: 113 bodybuilders were evaluated, mean age was 30.5 ± 8.65 years and mean BMI was 25.2 ± 3.65 kg/m2. Mean values for hip flexion, adduction, abduction, internal rotation, external rotation and distance between the knee and the table (FABER distance) were 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 and 19 ± 4, respectively. Eight (7%) participants presented hip pain within the week prior to examination and only 2 (1,7%) presented with anterior impingement sign. None of the athletes who reported hip pain interrupted their physical training or performance. Conclusion: Symptomatic athletes continued their training program under the presence of hip pain. The frequency of hip pain among bodybuilders is high and may be underestimated in this study. Level of Evidence IV, Case series.

RESUMO Objetivo: Determinar a frequência de dor no quadril em atletas fisiculturistas durante três competições de fisiculturismo. Métodos: Este estudo avaliou fisiculturistas recrutados em três competições de fisiculturismo durante o ano de 2016. Termo de consentimento foi obtido de todos os participantes, e também foi obtido a aprovação do CEP. Rotina de treinos, condição de saúde, nível de sucesso nas competições, antecedente de dor no quadril ao exame físico foram avaliados. Resultados: Um total de 113 fisiculturistas foram avaliados, com idade e IMC médio de 30.5 ± 8.65 anos e 25.2 ± 3.65 kg/m2, respectivamente. O valor médio de flexão, adução, abdução, rotação interna, rotação externa do quadril, e distância entre o joelho e a mesa de exame (distância FABERE) foi de 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 e 19 ± 4, respectivamente. Oito (7%) participantes apresentavam dor no quadril dentro da última semana antes de serem examinados, e apenas dois (1.7%) apresentavam sinal do impacto anterior do quadril à manobra de flexão adução e rotação interna. A dor no quadril não afetou o treinamento físico e a performance dos atletas que reportaram dor no quadril. Conclusão: Atletas sintomáticos continuaram o programa de treinamento mesmo na presença de dor no quadril. A frequência de dor no quadril de atletas fisiculturistas é alta e pode ter sido subestimada neste estudo. Nível de Evidência IV, Série de casos.

EPIDEMIOLOGY OF HIP PAIN IN BRAZILIAN BODYBUILDERS.

OBJECTIVE: To determine the frequency of hip pain in competitive bodybuilders over three different bodybuilding competitions. METHODS: This study evaluated bodybuilders recruited from three competitions during the year of 2016. All participants provided their informed consent and the study received IRB approval. Training routine, health condition, level of success on competitions, history of hip pain and physical examination of the hip were evaluated. RESULTS: 113 bodybuilders were evaluated, mean age was 30.5 ± 8.65 years and mean BMI was 25.2 ± 3.65 kg/m2. Mean values for hip flexion, adduction, abduction, internal rotation, external rotation and distance between the knee and the table (FABER distance) were 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 and 19 ± 4, respectively. Eight (7%) participants presented hip pain within the week prior to examination and only 2 (1,7%) presented with anterior impingement sign. None of the athletes who reported hip pain interrupted their physical training or performance. CONCLUSION: Symptomatic athletes continued their training program under the presence of hip pain. The frequency of hip pain among bodybuilders is high and may be underestimated in this study. Level of Evidence IV, Case series.

OBJETIVO: Determinar a frequência de dor no quadril em atletas fisiculturistas durante três competições de fisiculturismo. MÉTODOS: Este estudo avaliou fisiculturistas recrutados em três competições de fisiculturismo durante o ano de 2016. Termo de consentimento foi obtido de todos os participantes, e também foi obtido a aprovação do CEP. Rotina de treinos, condição de saúde, nível de sucesso nas competições, antecedente de dor no quadril ao exame físico foram avaliados. RESULTADOS: Um total de 113 fisiculturistas foram avaliados, com idade e IMC médio de 30.5 ± 8.65 anos e 25.2 ± 3.65 kg/m2, respectivamente. O valor médio de flexão, adução, abdução, rotação interna, rotação externa do quadril, e distância entre o joelho e a mesa de exame (distância FABERE) foi de 116 ± 13, 23 ± 8, 71 ± 12, 40 ± 10, 36 ± 9 e 19 ± 4, respectivamente. Oito (7%) participantes apresentavam dor no quadril dentro da última semana antes de serem examinados, e apenas dois (1.7%) apresentavam sinal do impacto anterior do quadril à manobra de flexão adução e rotação interna. A dor no quadril não afetou o treinamento físico e a performance dos atletas que reportaram dor no quadril. CONCLUSÃO: Atletas sintomáticos continuaram o programa de treinamento mesmo na presença de dor no quadril. A frequência de dor no quadril de atletas fisiculturistas é alta e pode ter sido subestimada neste estudo. Nível de Evidência IV, Série de casos.

Characterizing cam-type hip impingement in professional women's ice hockey players.

OBJECTIVE: There is a high prevalence of femoroacetabular impingement (FAI) amongst elite men's ice hockey players, yet little is known about the hips of players in the National Women's Hockey League (NWHL). The primary purpose of this study was to determine the prevalence of radiographic cam-type FAI in women's professional ice hockey players. The secondary purpose was to analyze the relationship between the cam deformity and both menarchal age and hip range-of-motion (ROM). METHODS: Data were collected for NWHL players during pre-participation physicals. Alpha angles were measured on 45° Dunn radiographs, with alpha angles >55° defined as cam-positive. Pearson correlation coefficients (ρ) were performed to analyze the relationship between alpha angle and both ROM measurements and menarchal age, with statistical significance set at p < 0.05. RESULTS: Twenty-six athletes were included. Twenty-four (92%) had alpha angles >55°; 20 players (77%) had bilateral cam deformity. Average menarchal age was 13.8 ± 1.7 years. There was a significant association between age of menarche and alpha angle (ρ = 0.36, p < 0.02). There was no significant association between alpha angle and hip ROM (p > 0.05). CONCLUSION: Elite women's ice hockey players have a higher prevalence of cam-type morphology than the general population. The positive association between alpha angle and menarchal age lends additional support to the etiological hypothesis of the cam lesion resulting from activity-related stress at the proximal femoral physis during skeletal development. Professional women's ice hockey players have a high risk of developing cam-type morphology, although each player's menarchal age may mediate her individual risk for cam development.

Combining results from hip impingement and range of motion tests can increase diagnostic accuracy in patients with FAI syndrome.

PURPOSE: Clinical examination is an important part in the diagnosis of femoroacetabular impingement (FAI) syndrome. However, knowledge on reliability and validity of clinical diagnostic tests is scarce. The aims were to evaluate the inter-rater agreement and diagnostic accuracy of clinical tests to detect patients with FAI syndrome. METHODS: Eighty-one patients (49% women) were recruited. Two experienced raters performed impingement and range of motion (ROM) tests. Three criteria had to be fulfilled for the diagnosis of FAI syndrome: (1) symptoms; (2) CAM and/or Pincer morphology; and (3) being responder to intra-articular block injection. For inter-rater agreement, the Cohen's kappa statistics were used (0.41-0.60 = moderate, 0.61-0.80 = substantial agreement). For diagnostic accuracy, sensitivity, specificity, positive and negative predictive values were calculated. RESULTS: Anterior impingement test (AIMT), FADIR test and FABER test showed kappa values above 0.6. All passive hip ROM, except extension, had kappa values above 0.4. AIMT and FADIR showed the highest sensitivity, i.e., 80%, with a specificity of 26% and 25%, respectively. Passive hip ROM in internal rotation with neutral hip position had a sensitivity of 29% and a specificity of 94%. CONCLUSION: The AIMT, FADIR and FABER tests were reliable between two experienced raters, while results from different raters for hip ROM should be interpreted with caution. The AIMT and FADIR test can only be used to rule out patients with FAI syndrome, while evaluation of ROM in internal rotation with neutral position may be more suitable to rule in patients with FAI syndrome. LEVEL OF EVIDENCE: II.

Comparative Evaluation of Cross-table and Ducroquet Incidences for Measurement of the Hip Alpha Angle.

Objective The purpose of the present paper is to compare the equivalence of the measurement of the alpha angle using the Ducroquet and cross-table lateral views. Methods We have recruited 90 patients, resulting in 95 hips. We have standardized the realization of the radiographic views. The incidence of the lateral cross-table views were taken with 15° of internal rotation with the patient in the supine position, and the incidence of the Ducroquet views was standardized with the patient in the supine position, with 90° of flexion and 45° of abduction of the hip. The alpha angle was measured in both lateral views, by two musculoskeletal radiologists. The measurements were performed in 2 different times: an initial evaluation and another 4 weeks afterwards. The t Student test was used and calculated the intraclass correlation coefficient (ICC). Results We have found a good intraobserver correlation for both views in different times; there was no statistically significant difference between the measurements performed by the two views. However, the interobserver correlation was low. Conclusion In conclusion, the Ducroquet profile view is a good choice for the α angle measurement and can be used instead of the cross-table view.