Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 723 articles

Articles

Pelvic Morphology Differs in Rotation and Obliquity Between Developmental Dysplasia of the Hip and Retroversion

Moritz Tannast MD, Peter Pfannebecker MD, Joseph M. Schwab MD, Christoph E. Albers MD, Klaus A. Siebenrock MD, Lorenz Büchler MD

Developmental dysplasia of the hip (DDH) and acetabular retroversion represent distinct acetabular pathomorphologies. Both are associated with alterations in pelvic morphology. In cases where direct radiographic assessment of the acetabulum is difficult or impossible or in mixed cases of DDH and retroversion, additional indirect pelvimetric parameters would help identify the major underlying structural abnormality.

Is Posterior Hip Instability Associated with Cam and Pincer Deformity?

Aaron J. Krych MD, Matt Thompson MD, Christopher M. Larson MD, J. W. Thomas Byrd MD, Bryan T. Kelly MD

Posterior hip instability is an increasingly recognized injury in athletes; however, the function of patients after these injuries and an understanding of the pathoanatomy and underlying mechanism are currently unclear.

Surgical Technique: Second-generation Bone Marrow Stimulation via Surgical Dislocation to Treat Hip Cartilage Lesions

Michael Leunig MD, Lisa M. Tibor MD, Florian D. Naal MD, Reinhold Ganz MD, Matthias R. Steinwachs MD

Compared to knees, hips have more bony constraint and soft tissue coverage. Thus, repair of focal cartilage defects in hips requires more invasive and technically complex surgeries than simple arthroscopy or arthrotomy. Autologous matrix-induced chondrogenesis (AMIC) is a second-generation bone marrow stimulation technique. Improvement in Tegner, Lysholm, International Cartilage Repair Society (ICRS), and Cincinnati scores has been reported at 1 and 2 years after AMIC in knees. AMIC is potentially useful to repair defects in hips, but it is unknown whether it relieves symptoms or results in a durable construct.

Acetabular Component Positioning Using Anatomic Landmarks of the Acetabulum

Yong-Chan Ha MD, Jeong Joon Yoo MD, PhD, Young-Kyun Lee MD, Jin Young Kim MD, Kyung-Hoi Koo MD

The acetabular cup should be properly oriented to prevent dislocation and to reduce wear. However, achieving proper cup placement is challenging with potentially large variations of cup position. We propose a new technique to position the acetabular cup.

Case Report: Bilateral Femoral Neck Fractures in a Child and a Rare Complication of Slipped Capital Epiphysis After Internal Fixation

Nirmal Raj Gopinathan MS, Dip SICOT, Devendra Chouhan MS, Narendranadh Akkina MS, Prateek Behera MBBS

Bilateral traumatic femoral neck fractures are uncommon in children. The most commonly reported complications are nonunion, avascular necrosis of the femoral head, and chondrolysis. Slipped capital femoral epiphysis (SCFE) associated with nonunion after percutaneous partially threaded cancellous screw (PTCS) fixation of the fracture is an unreported complication.

Does Bone Wax Induce a Chronic Inflammatory Articular Reaction?

Lucian B. Solomon MD, PhD, FRACS, Carlos Guevara MD, PD, Lorenz Büchler MD, Donald W. Howie MBBS, PhD, FRACS, Roger W. Byard MD, Martin Beck MD, PD

Bone wax is used to control femoral neck bleeding during open femoroacetabular impingement (FAI) surgery. Despite its widespread use, only a few case reports and small case series describe side effects after extraarticular use. It is unclear whether intraarticular use of bone wax leads to such complications. However, during revision FAI surgery, we have observed various degrees of articular inflammatory reactions.

Parafoveal Chondral Defects Associated with Femoroacetabular Impingement

Ira Zaltz MD, Michael Leunig MD

Cam-type, pincer, and mixed femoroacetabular impingement (FAI) are accepted causes of labral and acetabular rim injury; however, the abnormal contact stresses associated with motion may damage other areas of the hip. Although cartilage damage to the femoral head has been reported previously in athletes, FAI-associated focal parafoveal chondral defects differ from previously reported lesions and represent a rare manifestation of the complex pathomechanics associated with FAI.

Slipped Capital Femoral Epiphysis: Prevalence, Pathogenesis, and Natural History

Eduardo N. Novais MD, Michael B. Millis MD

Obesity is a risk factor for developing slipped capital femoral epiphysis (SCFE). The long-term outcome after SCFE treatment depends on the severity of residual hip deformity and the occurrence of complications, mainly avascular necrosis (AVN). Femoroacetabular impingement (FAI) is associated with SCFE-related deformity and dysfunction in both short and long term.

Anterior Impingement Test for Labral Lesions Has High Positive Predictive Value

Takehito Hananouchi MD, PhD, Yukihiko Yasui MD, Kengo Yamamoto MD, Yukiyoshi Toritsuka MD, PhD, Kenji Ohzono MD, PhD

The anterior impingement test is intended to detect anterosuperior acetabular labral lesions. In patients treated for labral lesions its sensitivity is reportedly 95% to 100%, and in a small group of patients undergoing periacetabular osteotomy, its sensitivity was 59% and specificity 100%. However, the sensitivity, specificity, positive predictive value, and negative predict value of this test to detect these labral lesions in unselected patients with hip pain are unknown.

Report of Breakout Session: Strategies to Improve Hip Preservation Training

Christopher L. Peters MD, Paul E. Beaulé MD, Martin Beck MD, Moritz Tannast MD, William Jiranek MD, Rafael J. Sierra MD