TY - JOUR
T1 - Remodelling of femoral head-neck junction in slipped capital femoral epiphysis
T2 - A multicentre study
AU - Akiyama, Mio
AU - Nakashima, Yasuharu
AU - Kitano, Toshio
AU - Nakamura, Tomoyuki
AU - Takamura, Kazuyuki
AU - Kohno, Yusuke
AU - Yamamoto, Takuaki
AU - Motomura, Goro
AU - Ohishi, Masanobu
AU - Hamai, Satoshi
AU - Iwamoto, Yukihide
PY - 2013/12
Y1 - 2013/12
N2 - Purpose: We examined the remodelling of the femoral head-neck junction in patients with slipped capital femoral epiphysis (SCFE) and the frequency of residual cam deformities. Methods: We reviewed 69 hips in 56 patients with stable SCFE who had undergone in situ pinning. Mean age at slip was 11.7 years and the follow-up period 63.4 months. Cam deformity was evaluated using the anterior offset alpha (α) angle and head-neck offset ratio (HNOR). Results: The average α angle and HNOR significantly improved from 76.2 to 51.3 and 0.086 to 0.135, respectively; 25 hips (36.2 %) still had an α angle greater than 50, and 32 hips (46.4 %) had an HNOR of under 0.145. A multivariate analysis selected age at onset and slip angle as risk factors for cam deformity, with cutoff values 11.1 years and 21.0, respectively. Conclusions: Although most hips had remodelling of the head-neck junction, 29.4 % had residual cam deformities that may be susceptible to femoroacetabular impingement.
AB - Purpose: We examined the remodelling of the femoral head-neck junction in patients with slipped capital femoral epiphysis (SCFE) and the frequency of residual cam deformities. Methods: We reviewed 69 hips in 56 patients with stable SCFE who had undergone in situ pinning. Mean age at slip was 11.7 years and the follow-up period 63.4 months. Cam deformity was evaluated using the anterior offset alpha (α) angle and head-neck offset ratio (HNOR). Results: The average α angle and HNOR significantly improved from 76.2 to 51.3 and 0.086 to 0.135, respectively; 25 hips (36.2 %) still had an α angle greater than 50, and 32 hips (46.4 %) had an HNOR of under 0.145. A multivariate analysis selected age at onset and slip angle as risk factors for cam deformity, with cutoff values 11.1 years and 21.0, respectively. Conclusions: Although most hips had remodelling of the head-neck junction, 29.4 % had residual cam deformities that may be susceptible to femoroacetabular impingement.
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U2 - 10.1007/s00264-013-2047-6
DO - 10.1007/s00264-013-2047-6
M3 - Article
C2 - 24022736
AN - SCOPUS:84890549526
SN - 0341-2695
VL - 37
SP - 2331
EP - 2336
JO - International Orthopaedics
JF - International Orthopaedics
IS - 12
ER -