Prominent publications by MICHAEL B MILLIS

KOL Index score: 23647

BACKGROUND: 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 the severity of the dysplasia, but detailed radiographic assessments of acetabular morphology in patients with a lateral ...

Known for Periacetabular Osteotomy |  Patients Lcea |  Edge Angle |  Hip Dysplasia |  25 °
KOL Index score: 20700

BACKGROUND: Residual acetabular dysplasia is seen in combination with femoral pathomorphologies including an aspherical femoral head and valgus neck-shaft angle with high antetorsion. It is unclear how these femoral pathomorphologies affect range of motion (ROM) and impingement zones after periacetabular osteotomy.

QUESTIONS/PURPOSES: (1) Does periacetabular osteotomy (PAO) restore the typically excessive ROM in dysplastic hips compared with normal hips; (2) how do impingement locations ...

Known for Periacetabular Osteotomy |  Dysplastic Hips |  Range Motion |  Internal Rotation |  ° Flexion
KOL Index score: 18553

BACKGROUND: The Bernese periacetabular osteotomy (PAO) continues to be a commonly performed nonarthroplasty option to treat symptomatic developmental hip dysplasia, but there are few long-term followup studies evaluating results after PAO.

QUESTIONS/PURPOSES: (1) What is the long-term survivorship of the hip after PAO? (2) What were the validated outcomes scores among patients who had PAO more than 14 years ago? (3) What factors are associated with long-term failure?

METHODS: One hundred ...

Known for Pao Tha |  Symptomatic Hips |  Womac Pain |  Bernese Periacetabular |  Hip Score
KOL Index score: 14789

BACKGROUND: Closed reduction and percutaneous pin fixation is the treatment of choice for completely displaced (type-III) extension supracondylar fractures of the humerus in children, although controversy persists regarding the optimal pin-fixation technique. The purpose of this study was to compare the efficacy of lateral entry pin fixation with that of medial and lateral entry pin fixation for the operative treatment of completely displaced extension supracondylar fractures of the ...

Known for Lateral Entry |  Pin Fixation |  Displaced Supracondylar |  Humeral Fractures |  Humerus Children
KOL Index score: 14300

BACKGROUND: The age when patients present for treatment of symptomatic developmental dysplasia of the hip with periacetabular osteotomy (PAO) varies widely. Modifiable factors influencing age at surgery include preexisting activity level and body mass index (BMI). The severity of the hip dysplasia has also been implicated as a factor influencing the age at arthritis onset. The purpose of this study was to determine whether activity level, BMI, and severity of dysplasia are independent ...

Known for Activity Level |  Hip Dysplasia |  Periacetabular Osteotomy Pao |  Center Edge |  Ucla Score
KOL Index score: 13820

BACKGROUND: The efficacy of surgical and medical treatment of osteoarthritis is difficult to assess because of the lack of a noninvasive, sensitive measure of cartilage integrity. Delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) was designed to specifically examine glycosaminoglycan changes in articular cartilage that occur during the development of osteoarthritis. Our primary goal was to compare this technique with measurement of the joint space width on ...

Known for Hip Dysplasia |  Early Osteoarthritis |  Resonance Imaging |  Correlation Dgemric |  Delayed Gadolinium
KOL Index score: 13452

INTRODUCTION: Avascular necrosis (AVN) of the femoral head remains a major complication in the treatment of developmental dysplasia of the hip (DDH) in infants. We performed a retrospective analysis to look at the predictive ability of postclosed reduction contrast-enhanced magnetic resonance imaging (MRI) for AVN after closed reduction in DDH.

METHODS: Twenty-eight hips in 27 infants (aged 1-11 months) with idiopathic hip dislocations who had failed brace treatment underwent closed ...

Known for Avascular Necrosis |  Closed Reduction |  Magnetic Resonance |  Developmental Hip Dysplasia |  Avn Ddh
KOL Index score: 13072

BACKGROUND: Hip dysplasia leads to abnormal loading of articular cartilage, which results in osteoarthritis. Pelvic osteotomies such as the Bernese periacetabular osteotomy can improve the mechanics of the joint, but the results are variable and appear to depend on the amount of preexisting arthritis. Delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) is a technique designed to measure early arthritis, and it potentially could be used to select hips with too ...

Known for Hip Dysplasia |  Bernese Periacetabular Osteotomy |  Magnetic Resonance |  Delayed Gadolinium |  Articular Cartilage
KOL Index score: 12598

BACKGROUND: Hip pain secondary to acetabular dysplasia can prevent participation in recreational activities.

QUESTIONS/PURPOSES: We retrospectively evaluated the physical activity level and pain after periacetabular osteotomy (PAO) for the treatment of symptomatic hip dysplasia.

METHODS: Forty-seven female and four male patients with a mean age of 27 years underwent a PAO. Physical activity (UCLA) and pain (WOMAC) were assessed preoperatively, at 1 year, and at minimum 2 years ...

Known for Activity Level |  Symptomatic Hip Dysplasia |  Periacetabular Osteotomy |  1 Year |  Hip Pain
KOL Index score: 12543

BACKGROUND: Femoral head overcoverage by a deep and retroverted acetabulum has been postulated as a mechanical factor in slipped capital femoral epiphysis (SCFE). We assessed acetabular depth, coverage, and version in the hips of patients with unilateral SCFE; in the contralateral, uninvolved hips; and in healthy control hips.

METHODS: Thirty-six patients affected by unilateral SCFE were matched to 36 controls on the basis of sex and age. The acetabular depth-width ratio (ADR), the ...

Known for Acetabular Retroversion |  Scfe Hips |  Slipped Capital |  Femoral Epiphysis |  Compared Controls
KOL Index score: 11847

BACKGROUND: The Bernese periacetabular osteotomy is a commonly used non-arthroplasty option to treat developmental hip dysplasia in symptomatic younger patients. Predicting which hips will remain preserved and which hips will go on to require arthroplasty following periacetabular osteotomy is a major challenge. In the present study, we assessed the intermediate to long-term results following periacetabular osteotomy to demonstrate the clinical outcomes for patients with varying amounts ...

Known for Years Hips |  Bernese Periacetabular |  Hip Osteotomy |  Pain Score |  95 Confidence Interval
KOL Index score: 11449

BACKGROUND: Chronic mechanical overload of the acetabular rim may lead to acetabular labral disease in patients with hip dysplasia. Although arthroscopic debridement of the labrum may provide symptomatic relief, the underlying mechanical abnormality remains. There is little information regarding how the results of periacetabular osteotomy are affected by a prior primary treatment for labral disease in the presence of acetabular dysplasia.

METHODS: In a retrospective matched-cohort study, ...

Known for Periacetabular Osteotomy |  Acetabular Dysplasia |  Labral Tears |  Hip Arthroscopy |  Functional Outcomes
KOL Index score: 11393

Hip arthroscopy has become an established procedure for certain indications in adults, but experience in children and adolescents has been more limited. The purpose of this study is to report the early-term results of hip arthroscopy in children and adolescents. A consecutive case series of 54 hip arthroscopies in 42 patients 18 years old and younger over a 3-year period at a tertiary-care children's hospital with a minimum of 1 year of follow-up was reviewed. Patients were assessed with ...

Known for Hip Arthroscopy |  Children Adolescents |  Surgery Patients |  Perthes Disease |  Labral Tear
KOL Index score: 11386

OBJECTIVE: Delay in diagnosis of slipped capital femoral epiphysis (SCFE) has important implications in terms of slip severity and long-term hip outcome. The purpose of this study was to identify predictors of delay in the diagnosis of SCFE.

METHODS: A review of 196 patients with SCFE was performed. The primary outcome measure was delay from onset of symptoms to diagnosis. Covariates included age, gender, side, weight, pain location, insurance status, family income, slip severity, and ...

Known for Delay Diagnosis |  Scfe Patients |  Slipped Capital |  Femoral Epiphysis |  Slip Severity
KOL Index score: 11307

BACKGROUND: A comprehensive evaluation of hip radiographs in the young adult with hip pain has become increasingly complex and time consuming. The interobserver reliability of manually performed measurements of femoroacetabular impingement, including the alpha angle, has been questioned. Methods to improve the reliability of a radiographic evaluation may increase the clinical utility of these parameters.

PURPOSE: To determine the interobserver and intraobserver reliability of a ...

Known for Femoroacetabular Impingement |  Intraobserver Reliability |  Alpha Angle |  Acetabular Morphology |  Hip Osteoarthritis


MICHAEL B MILLIS: Influence Statistics

Sample of concepts for which MICHAEL B MILLIS is among the top experts in the world.
Concept World rank
reverse periacetabular #1
congruency acetabulum #1
improved understanding ubiquity #1
fossa size #1
scfe diagnosis #1
average 58 months #1
17 406 #1
global decreased enhancement #1
injury situ fixation #1
femoroacetabular impingement factors #1
factors cumulative injury #1
complex deviations shape #1
fewer patients obesity #1
pao treatment #1
developmental hip #1
pao 75 #1
chiari acetabulum adult #1
scfe clinical problem #1
illness acetabulum #1
undergoing bernese #1
scfe #1
200 hips pao #1
bernese periacetabular osteotomy #1
hips 24 #1
paos performed #1
pao surgery methods #1
secondary evidence instability #1
hip periacetabular #1
common scfe #1
ddh necrosis follow #1
hip prevention #1
osteotomy 4 #1
corrective surgery cases #1
joint partners #1
scfe proposed #1
severity femoroacetabular impingement #1
interaction clinical experts #1
46 71 fractures #1
lcea anterior #1
avn factors #1
46 71 #1
cfw pao #1
pao major #1
afno #1
anterior arthrotomy #1
mm difference 95 #1
paos arthroscopic cohort #1
contact pressures acetabulum #1
scfe adolescent #1
reduction hip #1

Key People For Periacetabular Osteotomy

Top KOLs in the world
Reinhold Ganz
femoral head periacetabular osteotomy surgical dislocation
hallux valgus internal fixation new periacetabular osteotomy
Klaus Arno Siebenrock
femoral head periacetabular osteotomy hip joint
Jeffrey W Mast†
internal fixation periacetabular osteotomy indirect reduction
Tho Son Vinh
new periacetabular osteotomy peroneal artery bone tumour
periacetabular osteotomy acetabular dysplasia hip arthroscopy


Concepts for whichMICHAEL B MILLIShas direct influence:Periacetabular osteotomy,  Acetabular dysplasia,  Hip dysplasia,  Hip arthroscopy,  Activity level,  Lateral entry,  Capital femoral,  Femoral version.


Concepts related to the work of other authors for whichfor which MICHAEL B MILLIS has influence:Hip arthroscopy,  Periacetabular osteotomy,  Femoroacetabular impingement,  Developmental dysplasia,  Femoral head,  Alpha angle,  Closed reduction.



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Boston Children's Hospital, Boston, Massachusetts, USA. | Child and Adult Hip Program, Department of Orthopaedic Surgery, Boston Children's Hospital, Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA. | Boston Children's Hosp

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