TY - JOUR
T1 - Intraarticular abnormalities in residual perthes and perthes-like hip deformities
AU - Ross, James R.
AU - Nepple, Jeffrey J.
AU - Baca, Geneva
AU - Schoenecker, Perry L.
AU - Clohisy, John C.
N1 - Funding Information:
The institution of one or more of the authors (JJN) has received, in any one year, funding from the Arthrex Hip Anatomical Study. One author (JCC) certifies that he has or may receive payments or benefits, in any one year, an amount less than $10,000, from Biomet (Warsaw, IN, USA). The institution of one of the authors (JCC) received research support from Zimmer, Inc (Warsaw, IN, USA) and the Curing Hip Disease Fund (St Louis, MO, USA). All ICMJE Conflict of Interest Forms for authors and Clinical Orthopaedics and Related Research editors and board members are on file with the publication and can be viewed on request. Each author certifies that his or her institution approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.
PY - 2012/11
Y1 - 2012/11
N2 - Background Residual Perthes and Perthes-like hip deformities are complex and may encompass proximal femoral deformity, secondary acetabular dysplasia, and associated intraarticular abnormalities. These intraarticular abnormalities have not been well characterized but may influence surgical technique and treatment outcomes. Questions/purposes We (1) determined the characteristics of intraarticular disease associated with residual Perthes-like hip deformities; and (2) correlated these intraarticular abnormalities with clinical characteristics and radiographic parameters of hip morphology. Methods We retrospectively reviewed 35 patients (36 hips) with residual Perthes or Perthes-like deformities and hip symptoms treated using a surgical dislocation. There were 24 males and 11 females; mean age was 18.5 years (range, 10-36 years). We prospectively documented all intraoperative findings and comprehensively reviewed all radiographs. Results Labral abnormalities and acetabular and femoral head cartilage abnormalities were present in 76%, 59%, and 81% of hips, respectively. Male sex was associated with severe chondromalacia (64% versus 27%), femoral head chondromalacia (92% versus 55%), and advanced radiographic osteoarthritis (44% versus 9%). Stulberg classification of 3 or greater was associated with moderate to severe acetabular chondromalacia (71%versus30%). Lateral center-edge angle>20° and acetabular inclination<15° correlated with severe chondromalacia (73% versus 38%; 23% versus 70%). Center-trochanteric distance<1.7 was associated with labral tears (90% versus 57%). Conclusions Chondral lesions and labral tears are common in symptomatic patients with residual Perthes or Perthes-like deformities. Male sex, a high trochanter, and joint incongruity are associated with more advanced intraarticular disease. Secondary acetabular dysplasia seems to protect the articular cartilage in that hips with acetabular dysplasia had less chondromalacia.
AB - Background Residual Perthes and Perthes-like hip deformities are complex and may encompass proximal femoral deformity, secondary acetabular dysplasia, and associated intraarticular abnormalities. These intraarticular abnormalities have not been well characterized but may influence surgical technique and treatment outcomes. Questions/purposes We (1) determined the characteristics of intraarticular disease associated with residual Perthes-like hip deformities; and (2) correlated these intraarticular abnormalities with clinical characteristics and radiographic parameters of hip morphology. Methods We retrospectively reviewed 35 patients (36 hips) with residual Perthes or Perthes-like deformities and hip symptoms treated using a surgical dislocation. There were 24 males and 11 females; mean age was 18.5 years (range, 10-36 years). We prospectively documented all intraoperative findings and comprehensively reviewed all radiographs. Results Labral abnormalities and acetabular and femoral head cartilage abnormalities were present in 76%, 59%, and 81% of hips, respectively. Male sex was associated with severe chondromalacia (64% versus 27%), femoral head chondromalacia (92% versus 55%), and advanced radiographic osteoarthritis (44% versus 9%). Stulberg classification of 3 or greater was associated with moderate to severe acetabular chondromalacia (71%versus30%). Lateral center-edge angle>20° and acetabular inclination<15° correlated with severe chondromalacia (73% versus 38%; 23% versus 70%). Center-trochanteric distance<1.7 was associated with labral tears (90% versus 57%). Conclusions Chondral lesions and labral tears are common in symptomatic patients with residual Perthes or Perthes-like deformities. Male sex, a high trochanter, and joint incongruity are associated with more advanced intraarticular disease. Secondary acetabular dysplasia seems to protect the articular cartilage in that hips with acetabular dysplasia had less chondromalacia.
UR - http://www.scopus.com/inward/record.url?scp=84867572314&partnerID=8YFLogxK
U2 - 10.1007/s11999-012-2375-7
DO - 10.1007/s11999-012-2375-7
M3 - Article
C2 - 22569718
AN - SCOPUS:84867572314
SN - 0009-921X
VL - 470
SP - 2968
EP - 2977
JO - Clinical orthopaedics and related research
JF - Clinical orthopaedics and related research
IS - 11
ER -