Editorial Commentary: Hip Joint Laxity, Microinstability, or Instability Require Precise Definition: No Matter What You Call It, It's Here to Stay!

Hip instability has gained recognition as an important cause of hip pathology. Causes include incongruency of the articular surfaces due to dysplasia and/or impingement, joint capsule pathology, labral pathology, ligamentum teres tears, ligamentous laxity, muscular imbalance, and tendon tears. Lacking clearly defined symptoms and tests has hindered identification and treatment of this condition.

Outcomes Among Athletes Versus Nonathletes After Arthroscopic Management of Femoroacetabular Impingement.

This study synthesizes and reports patient-reported outcomes (PROs) among athletes vs nonathletes after hip arthroscopy for femoroacetabular impingement. A systematic review was performed in November 2020 with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) process. We included studies that reported PROs for athletes vs nonathletes.

[PROXIMAL FEMUR FRACTURES IN A TERTIARY HOSPITAL DURING THE COVID-19 PANDEMIC].

Introduction: A larger number of proximal hip fractures occur outdoors rather than within a patient's home.

Background: At the beginning of 2020, Covid-19 was classified as a global pandemic. Elderly patients are at risk for both occurrences of osteoporotic proximal hip fractures and for increased morbidity and mortality due to infection with Covid-19.

Lateral to Medial Joint Space Ratio is Predictive of Survivorship After Primary Hip Arthroscopy.

Purpose: To assess whether preoperative joint space measures would be predictive of survivorship in patients undergoing hip arthroscopy (HA) for femoroacetabular impingement (FAI).

Methods: Data on consecutive patients who underwent hip arthroscopy between February 2008 and February 2018 were retrospectively reviewed. To be eligible for final analysis, patients were required to have preoperative radiographs for joint space measurements and data indicating conversion to a total hip arthroplasty (THA), hip resurfacing, or neither; at a minimum of 2 years after primary hip arthroscopy.

Predictors of Achieving the Maximal Outcome Improvement Threshold for Willingness to Undergo Revision Hip Arthroscopy.

Background: The maximal outcome improvement threshold for willingness to undergo revision hip arthroscopy (MOWT) has not been defined yet.

Purpose: To determine the percentage MOWT in patients who underwent revision hip arthroscopy and to identify predictors of achieving the MOWT.

Study Design: Case-control study; Level of evidence, 3.

Personalized Medicine Using Predictive Analytics: A Machine Learning-Based Prognostic Model for Patients Undergoing Hip Arthroscopy.

Background: Personalized medicine models to predict outcomes of orthopaedic surgery are scarce. Many have required data that are only available postoperatively, mitigating their usefulness in preoperative decision making.

Purpose: To establish a method for predictive modeling to enable individualized prognostication and shared decision making based on preoperative patient factors using data from a prospective hip preservation registry.

Decrease in incidence of proximal femur fractures in the elderly population during the Covid-19 pandemic: a case-control study.

Background: The World Health Organization classified Covid-19 as a pandemic during the first months of 2020 as lockdown measures were implemented globally to mitigate the increasing incidence of Covid-19-related morbidity and mortality. The purpose of this study was to evaluate the effect of national lockdown measures on proximal femur fracture epidemiology. Our hypothesis was that due to the prolonged period of stay-at-home orders, we would observe a decrease in the incidence of proximal femur fractures during the years 2020-21.

Isolated Endoscopic Gluteus Medius Repair Can Achieve Successful Clinical Outcomes at Minimum 2-Year Follow-up.

Purpose: To report on clinical presentations and outcomes in patients who underwent an isolated endoscopic gluteus medius (GM) repair.

Methods: We retrospectively reviewed and prospectively collected data on patients who underwent a primary isolated endoscopic GM repair. Patients were included if the following patient-reported outcome scores were obtained preoperatively and at minimum 2-year follow-up: modified Harris Hip Score (mHHS), Non-arthritic Hip Score (NAHS), and visual analog scale (VAS) score.

In-line Pullout Strength of 2 Acetabular Fixation Methods for Ligamentum Teres Reconstruction of the Hip: A Cadaveric Study.

Background: Ligamentum teres (LT) reconstruction is an appropriate alternative in select cases of LT full-thickness tears, resulting in hip micro- or macroinstability. Graft fixation at the acetabular fossa is critical to achieving the best functional results.

Purpose: The purpose of this study is to compare the pullout strength of 2 graft fixation methods used for LT reconstruction of the hip.

Circumferential and Segmental Labral Reconstruction: A Systematic Review.

The purposes of this study were to synthesize, report, and compare patient-reported outcomes (PROs) between arthroscopic segmental and circumferential labral reconstruction. A systematic review was performed in February 2019 using the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) method. Inclusion criteria were levels I to IV evidence, articles in English, arthroscopic labral reconstruction, and PROs data.

Short-term Outcomes of Concomitant Femoral Derotation Osteotomy and Hip Arthroscopy.

The goal of this study is to report the short-term outcomes of concomitant hip arthroscopy and femoral derotational osteotomy (FRO) to treat femoral malrotation and intra-articular pathology. Data were retrospectively reviewed for patients undergoing concomitant hip arthroscopy and FRO between March 2013 and January 2017. Patients were included if they had a minimum of 1 year of follow-up for modified Harris Hip Score (mHHS), Nonarthritic Hip Score (NAHS), Hip Outcome Score-Sports Specific Subscale (HOS-SSS), International Hip Outcome Tool (iHOT-12) score, 12-item Short Form Health Survey Physical component and Mental component (SF-12 P and SF-12 M, respectively) scores, Veterans RAND 12-item Health Survey Physical and Mental (VR-12 P and VR-12 M, respectively) scores, visual analog scale (VAS) score for pain, and patient satisfaction ratings.

Modern Suture Anchor Techniques for Gluteus Medius Tear Repair With Concomitant Total Hip Arthroplasty Using the Direct Anterior and Posterior Approaches.

Gluteus medius (GM) tears are currently a well-established source of pain and disability. However, their role in primary total hip arthroplasty (THA) in the setting of osteoarthritis (OA) has been underexamined in the literature. The purpose of this study was to report on short-term patient-reported outcome measurements (PROMs) for patients who underwent concomitant primary THA and GM repair.

Dunn View Alpha Angle More Useful Than Femoral Head-Neck Offset to Predict Acetabular Cartilage Damage in Patients With Femoroacetabular Impingement Syndrome Undergoing Hip Arthroscopy.

Purpose: To identify radiographic measurements and demographics that are predictive of acetabular cartilage damage in patients with femoroacetabular impingement syndrome (FAIS) undergoing hip arthroscopy. More specifically, to compare the predictive value of alpha angle and femoral head-neck offset, as measured on Dunn view radiographs, in determining the preoperative likelihood and severity of acetabular cartilage damage.

Methods: Patients were included if they underwent primary hip arthroscopy for FAIS between February 2008 and June 2020.

Consensus-based classification system for intra-operative management of labral tears during hip arthroscopy-aggregate recommendations from high-volume hip preservation surgeons.

The purpose of this study was to survey high-volume hip preservation surgeons regarding their perspectives on intra-operative management of labral tears to improve decision-making and produce an effective classification system. A cross-sectional survey of high-volume hip preservation surgeons was conducted in person and anonymously, using a questionnaire that is repeated for indications of labral debridement, repair and reconstruction given the torn labra are stable, unstable, viable or non-viable. Twenty-six high-volume arthroscopic hip surgeons participated in this survey.

Arthroscopic Triple Reconstruction in the Hip Joint: Restoration of Soft-Tissue Stabilizers in Revision Surgery for Gross Instability.

Gross hip instability in an active adult with previous normal hip anatomy is usually due to disruption of the static stabilizers of the hip joint. Although such a disruption can result from a high-grade injury, it can be iatrogenic after previous hip arthroscopy. The patient may present with a painful limp and recurrent subluxation sensation in the affected hip joint.

Surgeon-Specific Traction Time During Hip Arthroscopy for Primary Labral Repair Can Continue to Decrease After a Substantial Number of Surgeries.

Purpose: The purpose of this study was to evaluate the total traction time and traction time as a function of anchors placed (TTAP) for primary labral repair in patients undergoing hip arthroscopy by a single surgeon.

Methods: Patients were included if they received a primary labral repair with or without acetabuloplasty, chondroplasty, or ligamentum teres debridement as part of the treatment for femoroacetabular impingement (FAI). Patients were excluded if they had a previous ipsilateral hip surgery, prior hip conditions, Tönnis grade >1, open procedures, microfracture, ligamentum teres reconstruction, or labral reconstruction.

Total hip arthroplasty after pelvic osteotomy for acetabular dysplasia: A systematic review.

The purposes were (1) to investigate and compare the findings of patients undergoing total hip arthroplasty (THA) following a corrective pelvic osteotomy (PO), to a control group of patients who underwent THA but not PO and (2) to evaluate the outcomes and complications for secondary THA after PO. Three studies recorded reduced cup anteversion in the osteotomy group. Two studies reported higher PROs for the control group.

Minimum 5-Year Outcomes for Revision Hip Arthroscopy With a Prospective Subanalysis Against a Propensity-Matched Control Primary Group.

Background: There is a paucity of midterm outcome data on hip revision arthroscopic surgery.

Purpose: (1) To report minimum 5-year patient-reported outcome measurement scores (PROMSs) in patients who underwent revision hip arthroscopy, (2) to compare minimum 5-year PROMSs with a propensity-matched control group that underwent primary hip arthroscopy, and (3) to compare the rate of achieving the minimal clinically important difference (MCID) at minimum 5-year follow-up between the revision group and the propensity-matched control primary group.

Study Design: Cohort study; Level of evidence, 3.

The Inverse Relationship Between Labral Size and Acetabular Coverage: Does It Protect the Cartilage in the Dysplastic Hip?

Purpose: The aims of this study were to confirm the relationship between osseous coverage and labral size and to investigate the severity of intra-articular damage in borderline dysplastic hips in correlation to labral size.

Methods: Patients treated with primary hip arthroscopy for symptomatic labral tears between 2010 and 2018 were considered for this study. Patients were included if they had preoperative radiographic measures and intraoperative assessments of the labra and cartilage.

Pertrochanteric Calcifications in Patients With Greater Trochanteric Pain Syndrome: Description, Prevalence, and Correlation With Intraoperatively Diagnosed Hip Abductor Tendon Injuries.

Background: Pertrochanteric calcifications can be found in patients with greater trochanteric pain syndrome (GTPS). A systematic description of the types and prevalence of these calcifications has not been undertaken. Furthermore, there is conflicting evidence regarding their association with abductor tendon injuries.

Structured physical therapy protocols following hip arthroscopy and their effect on patient-reported outcomes-a systematic review of the literature.

Unlabelled: The purpose of this study was to analyze the effect of structured physical therapy protocols on patient-reported outcomes (PROs) following hip arthroscopy. A literature search was completed in October 2019 according to Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines to identify articles reporting specific rehabilitation protocols following hip arthroscopy that document PROs. Studies meeting all inclusion and exclusion were reviewed and data were extracted.