Full Text Journal Articles by
Author Michael B Millis

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What Are the Early Outcomes of True Reverse Periacetabular Osteotomy for Symptomatic Hip Overcoverage?

Stephanie Y Pun, Shayan Hosseinzadeh, Roya Dastjerdi, Michael B Millis,

<h4>Background</h4>Acetabular overcoverage is associated with pincer-type femoroacetabular impingement (FAI). A subtype of acetabular overcoverage is caused by a deep acetabulum with a negatively tilted acetabular roof, in which acetabular reorientation may be a preferable alternative to rim trimming to uncover the femoral head. We introduced the true reverse periacetabular osteotomy ... Read more >>

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2021, 479(5):1081-1093]

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CORR Insights®: What Is the Association Among Epiphyseal Rotation, Translation, and the Morphology of the Epiphysis and Metaphysis in Slipped Capital Femoral Epiphysis?

Michael B Millis,

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2021, 479(5):944-946]

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Editorial Comment: Selected Proceedings from the 2020 Bernese Hip Symposium.

Michael B Millis,

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2021, 479(5):904-905]

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Surgical Treatment of Femoroacetabular Impingement: Hip Arthroscopy Versus Surgical Hip Dislocation: A Propensity-Matched Analysis.

Jeffrey J Nepple, Ira Zaltz, Christopher M Larson, Paul E Beaulé, Young-Jo Kim, Michael B Millis, Rafael J Sierra, John C Clohisy, ,

<h4>Background</h4>Surgical treatment of femoroacetabular impingement (FAI) continues to evolve and is most commonly approached with either hip arthroscopy (HA) or surgical dislocation (SD) of the hip. The purpose of this study was to compare the outcomes of similar patients undergoing surgical treatment of FAI with either HA or SD.<h4>Methods</h4>A prospective ... Read more >>

J Bone Joint Surg Am (The Journal of bone and joint surgery. American volume)
[2020, 102(Suppl 2):51-58]

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Prearthritic Hip Disease: Important Issues.

Michael B Millis,

Prearthritic hip disease is challenging to define, diagnose, and treat. The mechanically abnormal hip, which has not yet suffered irreversible damage but will do so if its abnormal mechanics are not corrected, can be considered to be in a prearthritic stage. A conundrum regarding the treatment of many patients with ... Read more >>

J Bone Joint Surg Am (The Journal of bone and joint surgery. American volume)
[2020, 102(Suppl 2):3-7]

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What Proportion of Patients Undergoing Bernese Periacetabular Osteotomy Experience Nonunion, and What Factors are Associated with Nonunion?

Courtney M Selberg, Ariel D Davila-Parrilla, Kathryn A Williams, Young-Jo Kim, Michael B Millis, Eduardo N Novais,

<h4>Background</h4>The Bernese periacetabular osteotomy (PAO) is one of the most-used surgical techniques to treat symptomatic acetabular dysplasia. Although good functional and radiographic short-term and long-term outcomes have been reported, several complications after PAO have been described. One complication that may compromise clinical results is nonunion of an osteotomy. However, the ... Read more >>

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2020, 478(7):1648-1656]

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Surgical treatment of symptomatic post-slipped capital femoral epiphysis deformity: a comparative study between hip arthroscopy and surgical hip dislocation with or without intertrochanteric osteotomy.

James D Wylie, Michael P McClincy, Nishant Uppal, Patricia E Miller, Young-Jo Kim, Michael B Millis, Yi-Meng Yen, Eduardo N Novais,

Purpose:Our primary research question was to investigate the severity of deformity and articular damage as well as outcomes in patients undergoing hip arthroscopy compared with open surgery for the treatment of symptomatic slipped capital femoral epiphysis (SCFE) deformity. Methods:Retrospective review of surgical treatment of symptomatic SCFE deformity with a minimum ... Read more >>

J Child Orthop (Journal of children's orthopaedics)
[2020, 14(2):98-105]

Cited: 2 times

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What Is the Impact of Periacetabular Osteotomy Surgery on Patient Function and Activity Levels?

Jeff R Petrie, Eduardo N Novais, Tonya W An, , John Clohisy,

<h4>Background</h4>Periacetabular osteotomy (PAO) is a hip preserving procedure performed often in younger, highly active patients. However, counseling patients is difficult, as there are limited data regarding activity level after PAO. The purpose of this study is to analyze the physical activity levels after PAO in a large, prospective multicenter cohort.<h4>Methods</h4>Prospectively ... Read more >>

J Arthroplasty (The Journal of arthroplasty)
[2020, 35(6S):S113-S118]

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Slipped Capital Femoral Epiphysis in Children without Obesity.

Kyle K Obana, Ali A Siddiqui, Alexander M Broom, Kody Barrett, Lindsay M Andras, Michael B Millis, Rachel Y Goldstein,

OBJECTIVE:To evaluate rates and characteristics of slipped capital femoral epiphysis (SCFE) in children who are not obese to prevent missed diagnoses and subsequent complications. STUDY DESIGN:A multicenter, retrospective review identified all patients with SCFE from January 1, 2003 to December 31, 2012. Patients were excluded if they received previous surgery ... Read more >>

J Pediatr (The Journal of pediatrics)
[2020, 218:192-197.e1]

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Vascular Supply to the Femoral Head in Patients With Healed Slipped Capital Femoral Epiphysis.

Benjamin J Shore, Sami W Mardam-Bey, Young-Jo Kim, Travis Matheney, Eduardo N Novais, Michael B Millis, Yi-Meng Yen,

<h4>Background</h4>Slipped capital femoral epiphysis (SCFE) is one of the most common hip disorders. The vascularity of the lateral epiphyseal vessels supplying the femoral head in patients with healed SCFE has not been well defined. The purpose of this study was to characterize the location and number of lateral epiphyseal vessels ... Read more >>

J Pediatr Orthop (Journal of pediatric orthopedics)
[2020, 40(1):e53-e57]

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The borderline dysplastic hip: when and how is it abnormal?

Sarah D Bixby, Michael B Millis,

Borderline acetabular dysplasia refers to mildly sub-normal patterns of acetabular shape and coverage that might predispose children to mechanical dysfunction and instability. Borderline dysplasia generally includes children with a lateral center edge angle (CEA) of 18-24°. Some children with borderline radiographic measurements have normal joint mechanics and function while others ... Read more >>

Pediatr Radiol (Pediatric radiology)
[2019, 49(12):1669-1677]

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SCFE diagnosis delayed among patients with referred pain.

Michael B Millis,

J Pediatr (The Journal of pediatrics)
[2019, 212:242]

Cited: 1 time

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What factors affect fluoroscopy use during Bernese periacetabular osteotomy for acetabular dysplasia?

James D Wylie, Michael P McClincy, Evan K Stieler, Michael B Millis, Young-Jo Kim, Christopher L Peters, Eduardo N Novais,

Periacetabular osteotomy (PAO) is the treatment of choice for acetabular dysplasia in the skeletally mature. Little is known about factors affecting fluoroscopy use in PAO. Therefore, we strived to determine patient and surgery factors are associated with the amount of fluoroscopy time and radiation dose during PAO. We performed a ... Read more >>

J Hip Preserv Surg (Journal of hip preservation surgery)
[2019, 6(3):259-264]

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Hipology, Happology, and POSNA: Presidential Guest Lecture.

Michael B Millis,

J Pediatr Orthop (Journal of pediatric orthopedics)
[2019, 39(6 Suppl 1):S1-S5]

Cited: 1 time

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Periacetabular Osteotomy Improves Pain and Function in Patients With Lateral Center-edge Angle Between 18° and 25°, but Are These Hips Really Borderline Dysplastic?

Michael P McClincy, James D Wylie, Young-Jo Kim, Michael B Millis, Eduardo N Novais,

<h4>Background</h4>The treatment of mild or borderline acetabular dysplasia is controversial with surgical options including both arthroscopic labral repair with capsular closure or plication and periacetabular osteotomy (PAO). The degree to which improvements in pain and function might be achieved using these approaches may be a function of acetabular morphology and ... Read more >>

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2019, 477(5):1145-1153]

Cited: 9 times

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What Is the Reliability and Accuracy of Intraoperative Fluoroscopy in Evaluating Anterior, Lateral, and Posterior Coverage During Periacetabular Osteotomy?

James D Wylie, Mariana G Ferrer, Michael P McClincy, Patricia E Miller, Michael B Millis, Young-Jo Kim, Eduardo N Novais,

<h4>Background</h4>Periacetabular osteotomy (PAO) is an established treatment for acetabular dysplasia in the skeletally mature individual. Fluoroscopy is used intraoperatively for osteotomy completion and to judge fragment correction. However, a comprehensive study validating fluoroscopy to judge anterior, lateral, and posterior coverage in PAO has not been reported.<h4>Questions/purposes</h4>(1) Are radiographic and fluoroscopic ... Read more >>

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2019, 477(5):1138-1144]

Cited: 3 times

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Can Dynamic Ultrasonography of the Hip Reliably Assess Anterior Femoral Head Translation?

Pierre A d'Hemecourt, Dai Sugimoto, Maxwell McKee-Proctor, Rebecca L Zwicker, Sarah S Jackson, Eduardo N Novais, Young-Jo Kim, Michael B Millis, Andrea Stracciolini,

<h4>Background</h4>Hip microinstability has gained attention recently as a potential cause of hip pain. Currently there is a lack of evidence-based objective diagnostic criteria surrounding this diagnosis. Previous studies have shown translation of the femoral head during extreme hip positions. However, reliable assessment of femoral head translation is lacking.<h4>Questions/purposes</h4>(1) How precise ... Read more >>

Clin Orthop Relat Res (Clinical orthopaedics and related research)
[2019, 477(5):1086-1098]

Cited: 3 times

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Osteoid Osteoma About the Hip in Children and Adolescents.

Collin J May, Sarah D Bixby, Megan E Anderson, Young Jo Kim, Yi-Meng Yen, Michael B Millis, Benton E Heyworth,

<h4>Background</h4>The etiology of hip pain in pediatric and adolescent patients can be unclear. Osteoid osteoma (OO) about the hip in children has only been described in case reports or small studies. The present study assessed the clinical presentation and diagnostic course, imaging, and treatment approaches in a large cohort of ... Read more >>

J Bone Joint Surg Am (The Journal of bone and joint surgery. American volume)
[2019, 101(6):486-493]

Cited: 3 times

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How do the expectations of patients compare with their surgeons regarding outcomes of periacetabular osteotomy?

Gloria N Boye, James D Wylie, Patricia E Miller, Young-Jo Kim, Michael B Millis,

Our objective was to determine the frequency and strength of agreement between patients and their surgeons on preoperative expectations of the outcomes of periacetabular osteotomy (PAO) surgery. We also sought to determine whether patient preoperative function and pain levels were associated with patients' and surgeons' expectations and to identify the ... Read more >>

J Hip Preserv Surg (Journal of hip preservation surgery)
[2018, 5(4):378-385]

Cited: 1 time

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Analysis of Femoral Version in Patients Undergoing Periacetabular Osteotomy for Symptomatic Acetabular Dysplasia.

Wudbhav N Sankar, Eduardo Novais, Denise Koueiter, Christian Refakis, Ernest Sink, Michael B Millis, Young-Jo Kim, John Clohisy, Joel Wells, Jeffrey Nepple, Ira Zaltz,

<h4>Introduction</h4>A paucity of information exists on the range of femoral version, its effect on hip stability, clinical examination, and presentation in patients with symptomatic acetabular dysplasia. The purpose of this study was to describe the range of version in symptomatic acetabular dysplasia, the association between femoral version and proximal femoral ... Read more >>

J Am Acad Orthop Surg (The Journal of the American Academy of Orthopaedic Surgeons)
[2018, 26(15):545-551]

Cited: 1 time

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Functional Outcome Assessment in Hip Preservation Surgery.

James T Beckmann, Eren E Havrilak, Michael B Millis, James D Wylie,

JBJS Rev (JBJS reviews)
[2018, 6(7):e6]

Cited: 0 times

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Hip morphology predicts posterior hip impingement in a cadaveric model.

William Z Morris, Cody A Fowers, Douglas S Weinberg, Michael B Millis, Leigh-Anne Tu, Raymond W Liu,

INTRODUCTION:Posterior hip impingement is a recently-identified cause of hip pain. The purpose of this study is to characterise posterior femoroacetabular and ischiofemoral impingement and identify its predisposing morphologic traits. METHODS:Two hundred and six cadaveric hips were randomly selected and taken through controlled motion in two pure axes associated with posterior ... Read more >>

Hip Int (Hip international : the journal of clinical and experimental research on hip pathology and therapy)
[2019, 29(3):322-327]

Cited: 2 times

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Mid-Term Results of Periacetabular Osteotomy for the Treatment of Hip Dysplasia Associated with Down Syndrome: Minimum Follow-up of Five Years.

Daniel A Maranho, Kathryn A Williams, Michael B Millis, Young-Jo Kim, Eduardo N Novais,

BACKGROUND:The treatment of hip dysplasia in patients with Down syndrome is challenging. We investigated the clinical, functional, and radiographic outcomes of periacetabular osteotomy (PAO) as well as factors associated with its failure at a minimum of 5 years of follow-up. METHODS:Between 1992 and 2011, 19 patients with Down syndrome (26 ... Read more >>

J Bone Joint Surg Am (The Journal of bone and joint surgery. American volume)
[2018, 100(5):428-434]

Cited: 1 time

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Does Severity of Acetabular Dysplasia Influence Clinical Outcomes After Periacetabular Osteotomy?-A Case-Control Study.

George Grammatopoulos, Paul E Beaulé, Cecilia Pascual-Garrido, Jeff J Nepple, , John C Clohisy,

BACKGROUND:Detailed characterization of factors influencing post-periacetabular osteotomy (PAO) outcome could guide treatment offered. METHODS:Using a prospective, multicenter database of PAOs, 61 hips/patients (51 females) with lesser dysplasia (acetabular index < 15° and lateral center-edge angle > 15°) were case-control matched for age, gender, body mass index, Tönnis grade, and joint ... Read more >>

J Arthroplasty (The Journal of arthroplasty)
[2018, 33(7S):S66-S70]

Cited: 2 times

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Do young female dancers improve symptoms and return to dancing after periacetabular osteotomy for the treatment of symptomatic hip dysplasia?

Eduardo N Novais, Songkiat Thanacharoenpanich, Ali Seker, Matthew J Boyle, Patricia E Miller, Garrett Bowen, Michael B Millis, Young-Jo Kim,

Although preservation of high activity level has been reported in active young patients after periacetabular osteotomy (PAO) for the treatment of symptomatic hip dysplasia, there is limited evidence whether a dancer may be able to resume dancing after PAO. We asked whether female dancers experience improvement in pain and sports-related ... Read more >>

J Hip Preserv Surg (Journal of hip preservation surgery)
[2018, 5(2):150-156]

Cited: 1 time

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